!> @agent_preprocessing.f90 !------------------------------------------------------------------------------! ! This file is part of the PALM model system. ! ! PALM is free software: you can redistribute it and/or modify it under the ! terms of the GNU General Public License as published by the Free Software ! Foundation, either version 3 of the License, or (at your option) any later ! version. ! ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. ! ! You should have received a copy of the GNU General Public License along with ! PALM. If not, see . ! ! Copyright 1997-2019 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ------------------ ! ! ! Former revisions: ! -----------------! ! $Id: agent_preprocessing.f90 3665 2019-01-10 08:28:24Z knoop $ ! Changed getcwd to GET_ENVIRONMENT_VARIABLE and changed X to 1X in format ! statements to have code conform to fortran 2008 standard ! ! 3259 2018-09-18 09:53:18Z sward ! Removed unused variables and fixed real to real comparisons ! ! 3216 2018-08-29 10:22:12Z sward ! Bubfix for gfortran: reordering of type definitions ! ! 3210 2018-08-28 07:31:13Z sward ! Bugfix: changed intrinsic SIZEOF to STORAGE_SIZE ! ! 3208 2018-08-27 13:10:50Z sward ! Renamed nav_mesh to agent_preprocessing, adapted terminal output ! ! 3198 2018-08-15 09:23:10Z sward ! Reduced tolerance_dp to 3 entries, fixed its initialization ! ! 3168 2018-07-25 06:40:29Z sward ! Updated NetCDF ororgraphy and building input ! ! Initial revision ! ! ! Description: ! ------------ !> Reads topography and building data and converts this information into a !> navigation mesh (NavMesh, a visibility graph). This mesh is necessary for !> the use of the Multi Agent System in PALM for the agents to navigate in !> complex (urban) terrain. !------------------------------------------------------------------------------! MODULE kinds IMPLICIT NONE ! !-- Floating point kinds INTEGER, PARAMETER :: sp = 4 !< single precision (32 bit) INTEGER, PARAMETER :: dp = 8 !< double precision (64 bit) ! !-- Integer kinds INTEGER, PARAMETER :: isp = SELECTED_INT_KIND( 9 ) !< single precision (32 bit) INTEGER, PARAMETER :: idp = SELECTED_INT_KIND( 14 ) !< double precision (64 bit) ! !-- Set kinds to be used as defaults INTEGER, PARAMETER :: wp = dp !< default real kind INTEGER, PARAMETER :: iwp = isp !< default integer kind SAVE END MODULE kinds MODULE variables USE kinds CHARACTER(LEN=3) :: char_lod = 'lod' !< name of level-of-detail attribute in NetCDF file CHARACTER(LEN=10) :: char_fill = '_FillValue' !< name of fill value attribute in NetCDF file CHARACTER(LEN=128) :: runname !< Run name LOGICAL :: internal_buildings = .FALSE. !< Flag that indicates whether buildings within closed courtyards should be deleted LOGICAL :: flag_2d = .FALSE. !< Flag that indicates that 2d buildings will be used in all cases INTEGER(iwp) :: i !< Index along x INTEGER(iwp) :: j !< Index along y INTEGER(iwp) :: nx = 99999 !< Number of grid points in x-direction INTEGER(iwp) :: ny = 99999 !< Number of grid points in x-direction INTEGER(iwp) :: nov !< Number of vertices INTEGER(iwp) :: polygon_counter !< Iterator for the number of building polygons INTEGER(iwp) :: number_of_connections = 0 !< Counter for number of connections in mesh INTEGER(iwp) :: i_cn !< Min number of corners left in polygons after Douglas Poiker algorithm INTEGER(iwp) :: i_sc !< Cycle number for Douglas-Peucker algorithm INTEGER(iwp) :: nc_stat !< return value of nf90 function call INTEGER(iwp) :: vertex_counter !< Counter: total number of vertices INTEGER, DIMENSION(:,:), ALLOCATABLE :: wall_flags_0 !< Bit-array containing surface information INTEGER, DIMENSION(:,:), ALLOCATABLE :: polygon_id !< Identifies each grid point as part of exactly one building REAL(wp) :: ddx !< inverse of dx REAL(wp) :: ddy !< inverse of dy REAL(wp) :: dx = 99999.9_wp !< grid spacing in x-direction REAL(wp) :: dy = 99999.9_wp !< grid spacing in x-direction REAL(wp) :: dz = 99999.9_wp !< grid spacing in x-direction REAL(wp) :: finish !< variable for CPU time measurement REAL(wp) :: start !< variable for CPU time measurement REAL(wp), DIMENSION(0:2) :: tolerance_dp = 999999.0_wp !< tolerance in Douglas-Peucker algorithm REAL(wp), DIMENSION(:,:), ALLOCATABLE :: obstacle_height !< height of obstacles ! !-- Define data structure where the dimension and type of the input depends !-- on the given level of detail. !-- For buildings, the input is either 2D float, or 3d byte. TYPE build_in INTEGER(iwp) :: lod = 1 !< level of detail INTEGER(KIND=1) :: fill2 = -127 !< fill value for lod = 2 INTEGER(iwp) :: nz !< number of vertical layers in file INTEGER(KIND=1), DIMENSION(:,:,:), ALLOCATABLE :: var_3d !< 3d variable (lod = 2) REAL(wp), DIMENSION(:), ALLOCATABLE :: z !< vertical coordinate for 3D building, used for consistency check LOGICAL :: from_file = .FALSE. !< flag indicating whether an input variable is available and read from file or default values are used REAL(wp) :: fill1 = -9999.9_wp !< fill values for lod = 1 REAL(wp), DIMENSION(:,:), ALLOCATABLE :: var_2d !< 2d variable (lod = 1) END TYPE build_in ! !-- Topography grid point TYPE grid_point LOGICAL :: checked !< Flag to indicate whether this grid point has been evaluated already INTEGER(iwp) :: i !< x-index INTEGER(iwp) :: j !< y-index INTEGER(iwp) :: polygon_id !< ID of the polygon this grid point belongs to END TYPE grid_point ! !-- Node in the visibility graph navigation mesh TYPE mesh_point INTEGER(iwp) :: polygon_id !< Polygon the point belongs to INTEGER(iwp) :: vertex_id !< Vertex in the polygon INTEGER(iwp) :: noc !< number of connections INTEGER(iwp) :: origin_id !< ID of previous mesh point on path (A*) REAL(wp) :: cost_so_far !< Cost to reach this mesh point (A*) REAL(wp) :: x !< x-coordinate REAL(wp) :: y !< y-coordinate REAL(wp) :: x_s !< corner shifted outward from building by 1m (x) REAL(wp) :: y_s !< corner shifted outward from building by 1m (y) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: connected_vertices !< Index of connected vertices REAL(wp), DIMENSION(:), ALLOCATABLE :: distance_to_vertex !< Distance to each vertex END TYPE mesh_point ! !-- Vertex of a polygon TYPE vertex_type LOGICAL :: delete !< Flag to mark vertex for deletion REAL(wp) :: x !< x-coordinate REAL(wp) :: y !< y-coordinate END TYPE vertex_type ! !-- Polygon containing a number of vertices TYPE polygon_type INTEGER(iwp) :: nov !< Number of vertices in this polygon TYPE(vertex_type), DIMENSION(:), ALLOCATABLE :: vertices !< Array of vertices END TYPE polygon_type ! !-- Define data type to read 2D real variables TYPE real_2d LOGICAL :: from_file = .FALSE. !< flag indicating whether an input variable is available and read from file or default values are used REAL(wp) :: fill = -9999.9_wp !< fill value REAL(wp), DIMENSION(:,:), ALLOCATABLE :: var !< respective variable END TYPE real_2d ! !-- Define data type to read 2D real variables TYPE real_3d LOGICAL :: from_file = .FALSE. !< flag indicating whether an input variable is available and read from file or default values are used INTEGER(iwp) :: nz !< number of grid points along vertical dimension REAL(wp) :: fill = -9999.9_wp !< fill value REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: var !< respective variable END TYPE real_3d TYPE(grid_point), DIMENSION(:,:), ALLOCATABLE :: grid !< 2d Topography grid TYPE(mesh_point), DIMENSION(:), ALLOCATABLE, TARGET :: mesh !< Navigation mesh TYPE(real_2d) :: terrain_height_f !< input variable for terrain height TYPE(vertex_type) :: dummy_vertex !< placeholder vertex used for data copying TYPE(vertex_type) :: null_vertex !< placeholder vertex used for initialisation TYPE(vertex_type), DIMENSION(:), ALLOCATABLE :: dummy_v_list !< Dummy for reallocation of polygon array TYPE(polygon_type), POINTER :: polygon !< Current polygon TYPE(polygon_type), DIMENSION(:), ALLOCATABLE, TARGET :: polygons !< Building polygons TYPE(build_in) :: buildings_f !< input variable for buildings END MODULE variables MODULE data_input USE kinds USE variables #if defined ( __netcdf ) USE NETCDF #endif INTERFACE get_variable MODULE PROCEDURE get_variable_1d_int MODULE PROCEDURE get_variable_1d_real MODULE PROCEDURE get_variable_2d_int8 MODULE PROCEDURE get_variable_2d_int32 MODULE PROCEDURE get_variable_2d_real MODULE PROCEDURE get_variable_3d_int8 MODULE PROCEDURE get_variable_3d_real MODULE PROCEDURE get_variable_4d_real END INTERFACE get_variable INTERFACE get_attribute MODULE PROCEDURE get_attribute_real MODULE PROCEDURE get_attribute_int8 MODULE PROCEDURE get_attribute_int32 MODULE PROCEDURE get_attribute_string END INTERFACE get_attribute CONTAINS !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads orography and building information. !------------------------------------------------------------------------------! SUBROUTINE netcdf_data_input_topo ( input_trunk ) IMPLICIT NONE CHARACTER(LEN=*) :: input_trunk !< run path CHARACTER(LEN=200) :: input_filename !< filename CHARACTER(LEN=100), DIMENSION(:), ALLOCATABLE :: var_names !< variable names in static input file INTEGER(iwp) :: i !< running index along x-direction INTEGER(iwp) :: k_head !< minimum k index for agents to walk underneath overhanging buildings INTEGER(iwp) :: id_topo !< NetCDF id of topograhy input file INTEGER(iwp) :: j !< running index along y-direction INTEGER(iwp) :: num_vars !< number of variables in netcdf input file LOGICAL :: netcdf_flag = .FALSE. !< indicates whether netcdf file is used for input LOGICAL :: lod_flag = .FALSE. !< true if 3d building data is used LOGICAL :: topo_file_flag = .FALSE. !< true if 3d building data is used WRITE(*,'((1X,A,/))') 'Looking for topography/building information' INQUIRE( FILE = TRIM( input_trunk )//'_static', EXIST = netcdf_flag ) IF ( netcdf_flag ) THEN input_filename = TRIM( input_trunk )//'_static' WRITE(*,'(2(3X,A,/))') 'Topography/building data will be used from', & TRIM( input_trunk )//'_static' ELSE WRITE(*,'(2(3X,A,/))') 'No static driver was found.', & 'Trying to read building data from _topo file.' input_filename = TRIM( input_trunk )//'_topo' INQUIRE( FILE = TRIM( input_filename ), EXIST = topo_file_flag ) IF ( .NOT. topo_file_flag ) THEN WRITE(*,'(6(3X,A,/))') & 'No ASCII topography file was found in INPUT directory.', & 'Make sure you provided building data in the form of either', & ' (A) a static driver (_static) or', & ' (B) an ASCII topography file (_topo).', & NEW_LINE('A')//'Aborting nav_mesh program...' STOP ENDIF WRITE(*,'(2(3X,A,/))') 'Topography/building data will be used from', & TRIM( input_trunk )//'_topo' ENDIF ! !-- Input via palm-input data standard IF ( netcdf_flag ) THEN #if defined ( __netcdf ) ! !-- Open file in read-only mode CALL open_read_file( TRIM(input_filename) , id_topo ) ! !-- At first, inquire all variable names. !-- This will be used to check whether an input variable exist or not. nc_stat = NF90_INQUIRE( id_topo, NVARIABLES = num_vars ) CALL handle_error( 'inquire_num_variables', 534 ) ! !-- Allocate memory to store variable names and inquire them. ALLOCATE( var_names(1:num_vars) ) CALL inquire_variable_names( id_topo, var_names ) ! !-- Terrain height. First, get variable-related _FillValue attribute IF ( check_existence( var_names, 'zt' ) ) THEN terrain_height_f%from_file = .TRUE. CALL get_attribute( id_topo, char_fill, & terrain_height_f%fill, & .FALSE., 'zt' ) ! !-- PE-wise reading of 2D terrain height. ALLOCATE ( terrain_height_f%var(0:ny,0:nx) ) DO i = 0, nx CALL get_variable( id_topo, 'zt', & i, terrain_height_f%var(:,i) ) ENDDO ELSE terrain_height_f%from_file = .FALSE. ENDIF ! !-- Read building height. First, read its _FillValue attribute, !-- as well as lod attribute buildings_f%from_file = .FALSE. IF ( check_existence( var_names, 'buildings_2d' ) ) THEN buildings_f%from_file = .TRUE. CALL get_attribute( id_topo, char_lod, buildings_f%lod, & .FALSE., 'buildings_2d' ) CALL get_attribute( id_topo, char_fill, & buildings_f%fill1, & .FALSE., 'buildings_2d' ) ! !-- Read 2D topography IF ( buildings_f%lod == 1 ) THEN ALLOCATE ( buildings_f%var_2d(0:ny,0:nx) ) DO i = 0, nx CALL get_variable( id_topo, 'buildings_2d', & i, buildings_f%var_2d(:,i) ) ENDDO ELSE WRITE(*,'(A)') 'NetCDF attribute lod ' // & '(level of detail) is not set properly.' ENDIF ENDIF ! !-- If available, also read 3D building information. If both are !-- available, use 3D information. Do this only if the flag that indicates !-- that 2d buildings shall be used no matter what is false. IF ( check_existence( var_names, 'buildings_3d' ) & .AND. .NOT. flag_2d ) & THEN lod_flag = .TRUE. buildings_f%from_file = .TRUE. CALL get_attribute( id_topo, char_lod, buildings_f%lod, & .FALSE., 'buildings_3d' ) CALL get_attribute( id_topo, char_fill, & buildings_f%fill2, & .FALSE., 'buildings_3d' ) CALL get_dimension_length( id_topo, buildings_f%nz, 'z' ) IF ( buildings_f%lod == 2 ) THEN ALLOCATE( buildings_f%z(0:buildings_f%nz-1) ) CALL get_variable( id_topo, 'z', buildings_f%z ) ALLOCATE( buildings_f%var_3d(0:buildings_f%nz-1, & 0:ny,0:nx) ) buildings_f%var_3d = 0 ! !-- Read data PE-wise. Read yz-slices. DO i = 0, nx DO j = 0, ny CALL get_variable( id_topo, 'buildings_3d', & i, j, & buildings_f%var_3d(:,j,i) ) ENDDO ENDDO ELSE WRITE(*,'(A)') 'NetCDF attribute lod ' // & '(level of detail) is not set properly.' ENDIF ENDIF ! !-- Close topography input file CALL close_input_file( id_topo ) #endif ! !-- ASCII input ELSE OPEN( 90, FILE= input_filename, & STATUS='OLD', FORM='FORMATTED' ) ! !-- Read data from nyn to nys and nxl to nxr. Therefore, skip !-- column until nxl-1 is reached ALLOCATE ( buildings_f%var_2d(0:ny,0:nx) ) DO j = ny, 0, -1 READ( 90, *, ERR=11, END=11 ) & ( buildings_f%var_2d(j,i), i = 0, nx ) ENDDO GOTO 12 11 WRITE(*,'(2A)') 'errors in file ',input_filename 12 CLOSE( 90 ) buildings_f%from_file = .TRUE. ENDIF ! !-- In case no terrain height is provided by static input file, allocate !-- array nevertheless and set terrain height to 0, which simplifies !-- topography initialization. IF ( .NOT. terrain_height_f%from_file ) THEN ALLOCATE ( terrain_height_f%var(0:ny,0:nx) ) terrain_height_f%var = 0.0_wp ENDIF ! !-- Transfer read data to uniform format: For agents the only relevant !-- information is whether they can walk or not at ground level. k_head = CEILING(2./dz) IF ( buildings_f%from_file ) THEN IF ( lod_flag ) THEN obstacle_height(0:nx,0:ny) = 1. DO j = 0, ny DO i = 0, nx ! !-- For this purpose, an overhanging structure that an angent !-- can walk beneath (e.g. a doorway) is not considered an !-- obstacle. IF ( ALL( buildings_f%var_3d(0:k_head,j,i) == 0 ) ) THEN obstacle_height(i,j) = 0. ENDIF ENDDO ENDDO ELSE DO j = 0, ny DO i = 0, nx obstacle_height(i,j) = buildings_f%var_2d(j,i) ENDDO ENDDO ENDIF ELSE WRITE(*,*) 'No building data was read from file. There will be no' //& 'navigation data available to agents.' ENDIF END SUBROUTINE netcdf_data_input_topo !------------------------------------------------------------------------------! ! Description: ! ------------ !> Checks if a given variables is on file !------------------------------------------------------------------------------! FUNCTION check_existence( vars_in_file, var_name ) IMPLICIT NONE CHARACTER(LEN=*) :: var_name !< variable to be checked CHARACTER(LEN=*), DIMENSION(:) :: vars_in_file !< list of variables in file INTEGER(iwp) :: i !< loop variable LOGICAL :: check_existence !< flag indicating whether a variable exist or not - actual return value i = 1 check_existence = .FALSE. DO WHILE ( i <= SIZE( vars_in_file ) ) check_existence = TRIM( vars_in_file(i) ) == TRIM( var_name ) .OR. & check_existence i = i + 1 ENDDO RETURN END FUNCTION check_existence !------------------------------------------------------------------------------! ! Description: ! ------------ !> Closes an existing netCDF file. !------------------------------------------------------------------------------! SUBROUTINE close_input_file( id ) #if defined( __netcdf ) IMPLICIT NONE INTEGER(iwp), INTENT(INOUT) :: id !< file id nc_stat = NF90_CLOSE( id ) CALL handle_error( 'close', 537 ) #endif END SUBROUTINE close_input_file !------------------------------------------------------------------------------! ! Description: ! ------------ !> Opens an existing netCDF file for reading only and returns its id. !------------------------------------------------------------------------------! SUBROUTINE open_read_file( filename, id ) #if defined( __netcdf ) IMPLICIT NONE CHARACTER (LEN=*), INTENT(IN) :: filename !< filename INTEGER(iwp), INTENT(INOUT) :: id !< file id nc_stat = NF90_OPEN( filename, NF90_NOWRITE, id ) CALL handle_error( 'open_read_file', 536 ) #endif END SUBROUTINE open_read_file !------------------------------------------------------------------------------! ! Description: ! ------------ !> Get dimension array for a given dimension !------------------------------------------------------------------------------! SUBROUTINE get_dimension_length( id, dim_len, variable_name ) #if defined( __netcdf ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< dimension name CHARACTER(LEN=100) :: dum !< dummy variable to receive return character INTEGER(iwp) :: dim_len !< dimension size INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_dim !< dimension id ! !-- First, inquire dimension ID nc_stat = NF90_INQ_DIMID( id, TRIM( variable_name ), id_dim ) CALL handle_error( 'get_dimension_length', 526 ) ! !-- Inquire dimension length nc_stat = NF90_INQUIRE_DIMENSION( id, id_dim, dum, LEN = dim_len ) CALL handle_error( 'get_dimension_length', 526 ) #endif END SUBROUTINE get_dimension_length !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 1D integer variable from file. !------------------------------------------------------------------------------! SUBROUTINE get_variable_1d_int( id, variable_name, var ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< dimension id INTEGER(iwp), DIMENSION(:), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- First, inquire variable ID nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) CALL handle_error( 'get_variable_1d_int', 527 ) ! !-- Inquire dimension length nc_stat = NF90_GET_VAR( id, id_var, var ) CALL handle_error( 'get_variable_1d_int', 527 ) #endif END SUBROUTINE get_variable_1d_int !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 1D float variable from file. !------------------------------------------------------------------------------! SUBROUTINE get_variable_1d_real( id, variable_name, var ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< dimension id REAL(wp), DIMENSION(:), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- First, inquire variable ID nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) CALL handle_error( 'get_variable_1d_real', 527 ) ! !-- Inquire dimension length nc_stat = NF90_GET_VAR( id, id_var, var ) CALL handle_error( 'get_variable_1d_real', 527 ) #endif END SUBROUTINE get_variable_1d_real !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 2D REAL variable from a file. Reading is done processor-wise, !> i.e. each core reads its own domain in slices along x. !------------------------------------------------------------------------------! SUBROUTINE get_variable_2d_real( id, variable_name, i, var ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: i !< index along x direction INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id REAL(wp), DIMENSION(0:ny), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- Inquire variable id nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) ! !-- Get variable nc_stat = NF90_GET_VAR( id, id_var, var(0:ny), & start = (/ i+1, 1 /), & count = (/ 1, ny + 1 /) ) CALL handle_error( 'get_variable_2d_real', 528 ) #endif END SUBROUTINE get_variable_2d_real !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 2D 32-bit INTEGER variable from file. Reading is done processor-wise, !> i.e. each core reads its own domain in slices along x. !------------------------------------------------------------------------------! SUBROUTINE get_variable_2d_int32( id, variable_name, i, var ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: i !< index along x direction INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id INTEGER(iwp), DIMENSION(0:ny), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- Inquire variable id nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) ! !-- Get variable nc_stat = NF90_GET_VAR( id, id_var, var(0:ny), & start = (/ i+1, 1 /), & count = (/ 1, ny + 1 /) ) CALL handle_error( 'get_variable_2d_int32', 529 ) #endif END SUBROUTINE get_variable_2d_int32 !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 2D 8-bit INTEGER variable from file. Reading is done processor-wise, !> i.e. each core reads its own domain in slices along x. !------------------------------------------------------------------------------! SUBROUTINE get_variable_2d_int8( id, variable_name, i, var ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: i !< index along x direction INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id INTEGER(KIND=1), DIMENSION(0:ny), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- Inquire variable id nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) ! !-- Get variable nc_stat = NF90_GET_VAR( id, id_var, var(0:ny), & start = (/ i+1, 1 /), & count = (/ 1, ny + 1 /) ) CALL handle_error( 'get_variable_2d_int8', 530 ) #endif END SUBROUTINE get_variable_2d_int8 !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 3D 8-bit INTEGER variable from file. !------------------------------------------------------------------------------! SUBROUTINE get_variable_3d_int8( id, variable_name, i, j, var ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: i !< index along x direction INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id INTEGER(iwp), INTENT(IN) :: j !< index along y direction INTEGER(iwp) :: n_file !< number of data-points along 3rd dimension INTEGER(iwp), DIMENSION(1:3) :: id_dim INTEGER( KIND = 1 ), DIMENSION(0:buildings_f%nz-1), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- Inquire variable id nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) ! !-- Get length of first dimension, required for the count parameter. !-- Therefore, first inquired dimension ids nc_stat = NF90_INQUIRE_VARIABLE( id, id_var, DIMIDS = id_dim ) nc_stat = NF90_INQUIRE_DIMENSION( id, id_dim(3), LEN = n_file ) ! !-- Get variable nc_stat = NF90_GET_VAR( id, id_var, var, & start = (/ i+1, j+1, 1 /), & count = (/ 1, 1, n_file /) ) CALL handle_error( 'get_variable_3d_int8', 531 ) #endif END SUBROUTINE get_variable_3d_int8 !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 3D float variable from file. !------------------------------------------------------------------------------! SUBROUTINE get_variable_3d_real( id, variable_name, i, j, var ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: i !< index along x direction INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id INTEGER(iwp), INTENT(IN) :: j !< index along y direction INTEGER(iwp) :: n3 !< number of data-points along 3rd dimension INTEGER(iwp), DIMENSION(3) :: id_dim REAL(wp), DIMENSION(:), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- Inquire variable id nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) ! !-- Get length of first dimension, required for the count parameter. !-- Therefore, first inquired dimension ids nc_stat = NF90_INQUIRE_VARIABLE( id, id_var, DIMIDS = id_dim ) nc_stat = NF90_INQUIRE_DIMENSION( id, id_dim(3), LEN = n3 ) ! !-- Get variable nc_stat = NF90_GET_VAR( id, id_var, var, & start = (/ i+1, j+1, 1 /), & count = (/ 1, 1, n3 /) ) CALL handle_error( 'get_variable_3d_real', 532 ) #endif END SUBROUTINE get_variable_3d_real !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads a 4D float variable from file. Note, in constrast to 3D versions, !> dimensions are already inquired and passed so that they are known here. !------------------------------------------------------------------------------! SUBROUTINE get_variable_4d_real( id, variable_name, i, j, var, n3, n4 ) IMPLICIT NONE CHARACTER(LEN=*) :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: i !< index along x direction INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id INTEGER(iwp), INTENT(IN) :: j !< index along y direction INTEGER(iwp), INTENT(IN) :: n3 !< number of data-points along 3rd dimension INTEGER(iwp), INTENT(IN) :: n4 !< number of data-points along 4th dimension REAL(wp), DIMENSION(:,:), INTENT(INOUT) :: var !< variable to be read #if defined( __netcdf ) ! !-- Inquire variable id nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) ! !-- Get variable nc_stat = NF90_GET_VAR( id, id_var, var, & start = (/ i+1, j+1, 1, 1 /), & count = (/ 1, 1, n3, n4 /) ) CALL handle_error( 'get_variable_4d_real', 533 ) #endif END SUBROUTINE get_variable_4d_real !------------------------------------------------------------------------------! ! Description: ! ------------ !> Prints out a text message corresponding to the current status. !------------------------------------------------------------------------------! SUBROUTINE handle_error( routine_name, errno ) IMPLICIT NONE CHARACTER(LEN=6) :: message_identifier CHARACTER(LEN=*) :: routine_name CHARACTER(LEN=100) :: message_string INTEGER(iwp) :: errno #if defined( __netcdf ) IF ( nc_stat /= NF90_NOERR ) THEN WRITE( message_identifier, '(''NC'',I4.4)' ) errno message_string = TRIM( NF90_STRERROR( nc_stat ) ) WRITE(*,*) routine_name,' ', message_identifier,' ', TRIM(message_string) WRITE(*,*) 'Aborting NavMesh-tool' ENDIF #endif END SUBROUTINE handle_error !------------------------------------------------------------------------------! ! Description: ! ------------ !> Inquires the variable names belonging to a file. !------------------------------------------------------------------------------! SUBROUTINE inquire_variable_names( id, var_names ) IMPLICIT NONE CHARACTER(LEN=*), DIMENSION(:), INTENT(INOUT) :: var_names !< return variable - variable names INTEGER(iwp) :: i !< loop variable INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: num_vars !< number of variables (unused return parameter) INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: varids !< dummy array to strore variable ids temporarily #if defined( __netcdf ) ALLOCATE( varids(1:SIZE(var_names)) ) nc_stat = NF90_INQ_VARIDS( id, NVARS = num_vars, VARIDS = varids ) CALL handle_error( 'inquire_variable_names', 535 ) DO i = 1, SIZE(var_names) nc_stat = NF90_INQUIRE_VARIABLE( id, varids(i), NAME = var_names(i) ) CALL handle_error( 'inquire_variable_names', 535 ) ENDDO DEALLOCATE( varids ) #endif END SUBROUTINE inquire_variable_names !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads global or variable-related attributes of type INTEGER (32-bit) !------------------------------------------------------------------------------! SUBROUTINE get_attribute_int32( id, attribute_name, value, global, & variable_name ) IMPLICIT NONE CHARACTER(LEN=*) :: attribute_name !< attribute name CHARACTER(LEN=*), OPTIONAL :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id INTEGER(iwp), INTENT(INOUT) :: value !< read value LOGICAL, INTENT(IN) :: global !< flag indicating global attribute #if defined( __netcdf ) ! !-- Read global attribute IF ( global ) THEN nc_stat = NF90_GET_ATT( id, NF90_GLOBAL, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_int32 global', 522 ) ! !-- Read attributes referring to a single variable. Therefore, first inquire !-- variable id ELSE nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) CALL handle_error( 'get_attribute_int32', 522 ) nc_stat = NF90_GET_ATT( id, id_var, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_int32', 522 ) ENDIF #endif END SUBROUTINE get_attribute_int32 !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads global or variable-related attributes of type INTEGER (8-bit) !------------------------------------------------------------------------------! SUBROUTINE get_attribute_int8( id, attribute_name, value, global, & variable_name ) IMPLICIT NONE CHARACTER(LEN=*) :: attribute_name !< attribute name CHARACTER(LEN=*), OPTIONAL :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id INTEGER(KIND=1), INTENT(INOUT) :: value !< read value LOGICAL, INTENT(IN) :: global !< flag indicating global attribute #if defined( __netcdf ) ! !-- Read global attribute IF ( global ) THEN nc_stat = NF90_GET_ATT( id, NF90_GLOBAL, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_int8 global', 523 ) ! !-- Read attributes referring to a single variable. Therefore, first inquire !-- variable id ELSE nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) CALL handle_error( 'get_attribute_int8', 523 ) nc_stat = NF90_GET_ATT( id, id_var, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_int8', 523 ) ENDIF #endif END SUBROUTINE get_attribute_int8 !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads global or variable-related attributes of type REAL !------------------------------------------------------------------------------! SUBROUTINE get_attribute_real( id, attribute_name, value, global, & variable_name ) IMPLICIT NONE CHARACTER(LEN=*) :: attribute_name !< attribute name CHARACTER(LEN=*), OPTIONAL :: variable_name !< variable name INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id LOGICAL, INTENT(IN) :: global !< flag indicating global attribute REAL(wp), INTENT(INOUT) :: value !< read value #if defined( __netcdf ) ! !-- Read global attribute IF ( global ) THEN nc_stat = NF90_GET_ATT( id, NF90_GLOBAL, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_real global', 524 ) ! !-- Read attributes referring to a single variable. Therefore, first inquire !-- variable id ELSE nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) CALL handle_error( 'get_attribute_real', 524 ) nc_stat = NF90_GET_ATT( id, id_var, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_real', 524 ) ENDIF #endif END SUBROUTINE get_attribute_real !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reads global or variable-related attributes of type CHARACTER !> Remark: reading attributes of type NF_STRING return an error code 56 - !> Attempt to convert between text & numbers. !------------------------------------------------------------------------------! SUBROUTINE get_attribute_string( id, attribute_name, value, global, & variable_name ) IMPLICIT NONE CHARACTER(LEN=*) :: attribute_name !< attribute name CHARACTER(LEN=*), OPTIONAL :: variable_name !< variable name CHARACTER(LEN=*), INTENT(INOUT) :: value !< read value INTEGER(iwp), INTENT(IN) :: id !< file id INTEGER(iwp) :: id_var !< variable id LOGICAL, INTENT(IN) :: global !< flag indicating global attribute #if defined( __netcdf ) ! !-- Read global attribute IF ( global ) THEN nc_stat = NF90_GET_ATT( id, NF90_GLOBAL, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_string global', 525 ) ! !-- Read attributes referring to a single variable. Therefore, first inquire !-- variable id ELSE nc_stat = NF90_INQ_VARID( id, TRIM( variable_name ), id_var ) CALL handle_error( 'get_attribute_string', 525 ) nc_stat = NF90_GET_ATT( id, id_var, TRIM( attribute_name ), value ) CALL handle_error( 'get_attribute_string',525 ) ENDIF #endif END SUBROUTINE get_attribute_string END MODULE MODULE mod_functions USE kinds PRIVATE PUBLIC dist_point_to_edge, intersect, is_left, is_right CONTAINS ! !-- Calculates distance of point P to edge (A,B). If A = B, calculates !-- point-to-point distance from A/B to P FUNCTION dist_point_to_edge ( a_x, a_y, b_x, b_y, p_x, p_y ) IMPLICIT NONE REAL(wp) :: ab_x !< x-coordinate of vector from A to B REAL(wp) :: ab_y !< y-coordinate of vector from A to B REAL(wp) :: ab_d !< inverse length of vector from A to B REAL(wp) :: ab_u_x !< x-coordinate of vector with direction of ab and length 1 REAL(wp) :: ab_u_y !< y-coordinate of vector with direction of ab and length 1 REAL(wp) :: ba_x !< x-coordinate of vector from B to A REAL(wp) :: ba_y !< y-coordinate of vector from B to A REAL(wp) :: ap_x !< x-coordinate of vector from A to P REAL(wp) :: ap_y !< y-coordinate of vector from A to P REAL(wp) :: bp_x !< x-coordinate of vector from B to P REAL(wp) :: bp_y !< y-coordinate of vector from B to P REAL(wp) :: a_x !< x-coordinate of point A of edge REAL(wp) :: a_y !< y-coordinate of point A of edge REAL(wp) :: b_x !< x-coordinate of point B of edge REAL(wp) :: b_y !< y-coordinate of point B of edge REAL(wp) :: p_x !< x-coordinate of point P REAL(wp) :: p_y !< y-coordinate of point P REAL(wp) :: dist_x !< x-coordinate of point P REAL(wp) :: dist_y !< y-coordinate of point P REAL(wp) :: dist_point_to_edge !< y-coordinate of point P ab_x = - a_x + b_x ab_y = - a_y + b_y ba_x = - b_x + a_x ba_y = - b_y + a_y ap_x = - a_x + p_x ap_y = - a_y + p_y bp_x = - b_x + p_x bp_y = - b_y + p_y IF ( ab_x * ap_x + ab_y * ap_y <= 0. ) THEN dist_point_to_edge = SQRT((a_x - p_x)**2 + (a_y - p_y)**2) ELSEIF ( ba_x * bp_x + ba_y * bp_y <= 0. ) THEN dist_point_to_edge = SQRT((b_x - p_x)**2 + (b_y - p_y)**2) ELSE ab_d = 1./SQRT((ab_x)**2+(ab_y)**2) ab_u_x = ab_x*ab_d ab_u_y = ab_y*ab_d dist_x = ap_x - (ap_x*ab_u_x+ap_y*ab_u_y)*ab_u_x dist_y = ap_y - (ap_x*ab_u_x+ap_y*ab_u_y)*ab_u_y dist_point_to_edge = SQRT( dist_x**2 + dist_y**2 ) ENDIF RETURN END FUNCTION dist_point_to_edge ! !-- Returns true if the line segments AB and PQ share an intersection FUNCTION intersect ( ax, ay, bx, by, px, py, qx, qy ) IMPLICIT NONE LOGICAL :: intersect !< return value; TRUE if intersection was found LOGICAL :: la !< T if a is left of PQ LOGICAL :: lb !< T if b is left of PQ LOGICAL :: lp !< T if p is left of AB LOGICAL :: lq !< T if q is left of AB LOGICAL :: poss !< flag that indicates if an intersection is still possible LOGICAL :: ra !< T if a is right of PQ LOGICAL :: rb !< T if b is right of PQ LOGICAL :: rp !< T if p is right of AB LOGICAL :: rq !< T if q is right of AB REAL(wp) :: ax !< x-coordinate of point A REAL(wp) :: ay !< y-coordinate of point A REAL(wp) :: bx !< x-coordinate of point B REAL(wp) :: by !< y-coordinate of point B REAL(wp) :: px !< x-coordinate of point P REAL(wp) :: py !< y-coordinate of point P REAL(wp) :: qx !< x-coordinate of point Q REAL(wp) :: qy !< y-coordinate of point Q intersect = .FALSE. poss = .FALSE. ! !-- Intersection is possible only if P and Q are on opposing sides of AB lp = is_left(ax,ay,bx,by,px,py) rq = is_right(ax,ay,bx,by,qx,qy) IF ( lp .AND. rq ) poss = .TRUE. IF ( .NOT. poss ) THEN lq = is_left(ax,ay,bx,by,qx,qy) rp = is_right(ax,ay,bx,by,px,py) IF ( lq .AND. rp ) poss = .TRUE. ENDIF ! !-- Intersection occurs only if above test (poss) was true AND !-- A and B are on opposing sides of PQ IF ( poss ) THEN la = is_left(px,py,qx,qy,ax,ay) rb = is_right(px,py,qx,qy,bx,by) IF ( la .AND. rb ) intersect = .TRUE. IF ( .NOT. intersect ) THEN lb = is_left(px,py,qx,qy,bx,by) ra = is_right(px,py,qx,qy,ax,ay) IF ( lb .AND. ra ) intersect = .TRUE. ENDIF ENDIF RETURN END FUNCTION intersect ! !-- Calculates if point P is left of the infinite !-- line that contains A and B (direction: A to B) !-- Concept: 2D rotation of two vectors FUNCTION is_left ( ax, ay, bx, by, px, py ) IMPLICIT NONE LOGICAL :: is_left !< return value; TRUE if P is left of AB REAL(wp) :: ax !< x-coordinate of point A REAL(wp) :: ay !< y-coordinate of point A REAL(wp) :: bx !< x-coordinate of point B REAL(wp) :: by !< y-coordinate of point B REAL(wp) :: px !< x-coordinate of point P REAL(wp) :: py !< y-coordinate of point P ! !-- 2D-rotation is_left = (bx-ax)*(py-ay)-(px-ax)*(by-ay) > 0 ! !-- False if the point is on the line (or very close) IF ( (ABS(ax-px) < .001 .AND. ABS(ay-py) < .001) .OR. & (ABS(bx-px) < .001 .AND. ABS(by-py) < .001) ) & THEN is_left = .FALSE. ENDIF RETURN END FUNCTION is_left ! !-- Calculates if point P is right of the infinite !-- line that contains A and B (direction: A to B) !-- Concept: 2D rotation of two vectors FUNCTION is_right ( ax, ay, bx, by, px, py ) IMPLICIT NONE LOGICAL :: is_right !< return value; TRUE if P is right of AB REAL(wp), INTENT(IN) :: ax !< x-coordinate of point A REAL(wp), INTENT(IN) :: ay !< y-coordinate of point A REAL(wp), INTENT(IN) :: bx !< x-coordinate of point B REAL(wp), INTENT(IN) :: by !< y-coordinate of point B REAL(wp), INTENT(IN) :: px !< x-coordinate of point P REAL(wp), INTENT(IN) :: py !< y-coordinate of point P ! !-- 2D-rotation is_right = (bx-ax)*(py-ay)-(px-ax)*(by-ay) < 0 ! !-- False if the point is on the line (or very close) IF ( (ABS(ax-px) < .001 .AND. ABS(ay-py) < .001) .OR. & (ABS(bx-px) < .001 .AND. ABS(by-py) < .001) ) & THEN is_right = .FALSE. ENDIF RETURN END FUNCTION is_right END MODULE mod_functions MODULE polygon_creation USE kinds USE mod_functions USE variables USE data_input CONTAINS !------------------------------------------------------------------------------! ! Description: ! ------------ !> Initialisation, allocation, and reading of some input !------------------------------------------------------------------------------! SUBROUTINE init IMPLICIT NONE CHARACTER(LEN=255) :: dirname !< dummy to read current working directory CHARACTER(LEN=255) :: rundir !< base run directory CHARACTER(LEN=255) :: input_trunk !< base filename for run including path CHARACTER(LEN=80) :: line !< string to identify namelist CHARACTER(LEN=80) :: line_dum !< line dummy for error output CHARACTER(LEN=2),DIMENSION(1:5) :: run_pars !< parameters from other namelist INTEGER(iwp) :: ie !< end index (string manipulation) INTEGER(iwp) :: is !< start index (string manipulation) INTEGER(iwp) :: line_counter !< line on which reading error occured LOGICAL :: p3d_flag = .FALSE. !< indicates whether p3d file was found NAMELIST /prepro_par/ flag_2d, internal_buildings, tolerance_dp WRITE(*,'(1X,A)') & "o----------------------------------------------o", & "| o------------------------------------------o |", & "| | __ ____ ____ ____ | |", & "| | / _\ ( _ \(_ _) ___ ( _ \ | |", & "| | / \ ) __/ )( (___) ) __/ | |", & "| | \_/\_/(__) (__) (__) | |", & "| | | |", & "| | Agent Preprocessing Tool for PALM | |", & "| o------------------------------------------o |", & "o----------------------------------------------o" ! !-- Identify run name and Input files CALL GET_ENVIRONMENT_VARIABLE('PWD', dirname) ie = INDEX(dirname, '/', BACK=.TRUE.) is = INDEX(dirname(1:ie-1), '/', BACK=.TRUE.) IF ( TRIM(ADJUSTL(dirname(ie+1:))) /= 'INPUT' ) THEN WRITE(*,'(3X,A)') 'NavMesh was called from', & ' ', TRIM(ADJUSTL(dirname)), ' ', & 'and is now aborting. Please call this tool', & 'from the INPUT-folder of your job directory.' STOP ENDIF runname = TRIM(ADJUSTL(dirname(is+1:ie-1))) rundir = TRIM(ADJUSTL(dirname(1:ie))) input_trunk = TRIM(rundir)//'INPUT/'//TRIM(runname) ! !-- Check for parameter file INQUIRE( FILE = TRIM( input_trunk )//'_p3d', EXIST = p3d_flag ) IF ( .NOT. p3d_flag ) THEN WRITE(*,'(3(3X,A,/))') 'No _p3d file was found. Aborting.', & 'I was looking for the file', & TRIM( input_trunk )//'_p3d' STOP ELSE WRITE(*,'(2(3X,A,/))') 'The following input file will be used:', & TRIM( input_trunk )//'_p3d' ENDIF ! !-- Read run parameters from run parameter file (_p3d), though not from !-- namelist. run_pars = (/'dx','dy','dz','nx','ny'/) OPEN ( 11, FILE=TRIM(input_trunk)//'_p3d', FORM='FORMATTED', & STATUS='OLD' ) DO i = 1, SIZE(run_pars) REWIND ( 11 ) line = ' ' DO WHILE ( INDEX( line, run_pars(i) ) == 0 ) READ ( 11, '(A)', END=10 ) line IF ( INDEX(line, '!') /= 0 ) THEN IF ( INDEX(line, run_pars(i)) > INDEX(line, '!' ) ) THEN line = ' ' CYCLE ENDIF ENDIF ENDDO line = TRIM(ADJUSTL(line(INDEX(line,'=')+1:INDEX(line,',')-1))) SELECT CASE (i) CASE(1) READ(line,*) dx CASE(2) READ(line,*) dy CASE(3) READ(line,*) dz CASE(4) READ(line,*) nx CASE(5) READ(line,*) ny CASE DEFAULT END SELECT ENDDO 10 CONTINUE ! !-- Try to find prepro package REWIND ( 11 ) line = ' ' DO WHILE ( INDEX( line, '&prepro_par' ) == 0 ) READ ( 11, '(A)', END=40 ) line ENDDO BACKSPACE ( 11 ) ! !-- Read user-defined namelist READ ( 11, prepro_par, ERR = 20, END = 40 ) GOTO 40 20 BACKSPACE( 11 ) READ( 11 , '(A)') line line_dum = ' ' line_counter = 0 REWIND( 11 ) DO WHILE ( INDEX( line_dum, TRIM(line) ) == 0 ) READ ( 11, '(A)', END=30 ) line_dum line_counter = line_counter + 1 ENDDO 30 WRITE( *, '(A,/,A,I3,A,/,A)' ) 'Error(s) in NAMELIST prepro_par.', & 'Reading fails on line ', line_counter, & ' at ', TRIM(ADJUSTL(line)) STOP 40 CONTINUE CLOSE( 11 ) ! !-- If tolerance_dp was not set, put in default values DO i = 0, 2 IF ( tolerance_dp(i) > 999998.0_wp ) THEN tolerance_dp(i) = SQRT(dx*dy)*1.41/(2**i) ELSE tolerance_dp(i) = tolerance_dp(i)*SQRT(dx*dy) ENDIF ENDDO ! !-- Allocate arrays ALLOCATE(obstacle_height(-3:nx+3,-3:ny+3), polygon_id(-3:nx+3,-3:ny+3), & wall_flags_0(-3:nx+3,-3:ny+3), grid(-3:nx+3,-3:ny+3)) ! !-- Set null_vertex CALL set_vertex(null_vertex,0.0_wp,0.0_wp) ! !-- Some initializations ddx = 1./dx ddy = 1./dy polygon_id = 0 obstacle_height = 0. grid%checked = .FALSE. grid(-3:-1,:)%checked = .TRUE. grid(nx+1:nx+3,:)%checked = .TRUE. grid(:,-3:-1)%checked = .TRUE. grid(:,ny+1:ny+3)%checked = .TRUE. grid%polygon_id = 0 ! !-- Open files and topography/building data CALL netcdf_data_input_topo ( TRIM(input_trunk) ) END SUBROUTINE init !------------------------------------------------------------------------------! ! Description: ! ------------ !> Identifies all grid boxes that belong to a building and assigns a building !> number to each grid box. !> Method: Scans each grid point. If a grid point was not previously checked !> and contains a building, it is added to a new polygon and marked as !> checked. Then, all its neighbors that also contain a building are !> added to the same polygon and marked as checked. All neighbors of !> neighbors are subsequently found, added and checked until none are !> left. Then, the initial scan continues, skipping already checked !> grid points. Once a grid point with a new building is found, the !> polygon_id increases and the grid point and all others that belong !> to the same building are added as described above. !> NOTE: This procedure will identify grid points that are only connected !> diagonally (share only one point with each other) as connected and !> have them belonging to the same building. This is necessary, as an !> agent will not be able to traverse between these grid points and the !> navigation mesh will therefore have to make him circumvent this !> point. !------------------------------------------------------------------------------! SUBROUTINE identify_polygons IMPLICIT NONE INTEGER(iwp) :: ii !< local counter INTEGER(iwp) :: il !< local counter INTEGER(iwp) :: jj !< local counter INTEGER(iwp) :: jl !< local counter INTEGER(iwp) :: gpil !< number of grid points in list INTEGER(iwp) :: gpta !< number of grid points to add to grid_list TYPE(grid_point), DIMENSION(1:7) :: add_to_grid_list !< grid points to be added to the list TYPE(grid_point), DIMENSION(:), ALLOCATABLE :: dummy_grid_list !< dummy for reallocation of grid_list TYPE(grid_point), DIMENSION(:), ALLOCATABLE :: grid_list !< list of grid points that belong to the current building but whose neighbors have not been checked yet ! !-- Initialize wall_flags array: 1 where no buildings, 0 where buildings wall_flags_0 = 1 DO i = 0, nx DO j = 0, ny IF ( obstacle_height(i,j) > 0 ) THEN wall_flags_0(i,j) = 0 ENDIF ENDDO ENDDO DEALLOCATE(obstacle_height) polygon_counter = 0 gpil = 0 gpta = 0 ALLOCATE(grid_list(1:100)) ! !-- Declare all grid points that contain no buildings as already checked. !-- This way, these points will be skipped in the following calculation and !-- will have polygon_id = 0 DO i = 0, nx DO j = 0, ny IF ( BTEST( wall_flags_0(i,j), 0 ) ) THEN grid(i,j)%checked = .TRUE. ENDIF ENDDO ENDDO ! !-- Check all grid points and process them DO i = 0, nx DO j = 0, ny ! !-- If the current grid point has not been checked, mark it as checked. !-- As it is the first point belonging to a new building, increase the !-- polygon_id counter and associate the grid point with that id. IF ( .NOT. grid(i,j)%checked ) THEN polygon_counter = polygon_counter + 1 grid(i,j)%polygon_id = polygon_counter grid(i,j)%checked = .TRUE. ! !-- Check if any neighbors of the found grid point are part of a !-- building too. If so, add them to the list of grid points !-- that have to be checked and associate them with the same polygon gpta = 0 DO ii = i-1, i+1 DO jj = j-1, j+1 IF ( ii == i .AND. jj == j ) CYCLE IF ( .NOT. grid(ii,jj)%checked ) THEN gpta = gpta + 1 add_to_grid_list(gpta)%i = ii add_to_grid_list(gpta)%j = jj ENDIF ENDDO ENDDO ! !-- Change size of grid_list if it becomes too small IF ( gpil + gpta > SIZE(grid_list) ) THEN ALLOCATE(dummy_grid_list(1:gpil)) dummy_grid_list = grid_list(1:gpil) DEALLOCATE(grid_list) ALLOCATE(grid_list(1:2*(gpil+gpta))) grid_list(1:gpil) = dummy_grid_list(1:gpil) DEALLOCATE(dummy_grid_list) ENDIF ! !-- If there are grid points to add to grid_list, add them IF ( gpta > 0 ) THEN grid_list(gpil+1:gpil+gpta) = add_to_grid_list(1:gpta) gpil = gpil + gpta ENDIF ! !-- Handle all grid points in grid_list until there are none left DO WHILE (gpil>0) il = grid_list(gpil)%i jl = grid_list(gpil)%j grid(il,jl)%polygon_id = polygon_counter grid(il,jl)%checked = .TRUE. ! !-- this grid point in the list is processed, so the number of !-- grid points in the list can be reduced by one gpil = gpil - 1 gpta = 0 ! !-- For the current grid point, check if any unchecked !-- neighboring grid points also contain a building. All such !-- grid points are added to the list of grid points to be !-- handled in this loop DO ii = il-1, il+1 DO jj = jl-1, jl+1 IF ( jj == jl .AND. ii == il ) CYCLE IF ( .NOT. grid(ii,jj)%checked ) & THEN gpta = gpta + 1 add_to_grid_list(gpta)%i = ii add_to_grid_list(gpta)%j = jj ENDIF ENDDO ENDDO ! !-- Change size of grid list if it becomes too small IF ( gpil + gpta > SIZE(grid_list) ) THEN ALLOCATE(dummy_grid_list(1:gpil)) dummy_grid_list = grid_list(1:gpil) DEALLOCATE(grid_list) ALLOCATE(grid_list(1:2*(gpil+gpta))) grid_list(1:gpil) = dummy_grid_list(1:gpil) DEALLOCATE(dummy_grid_list) ENDIF ! !-- If there are grid points to add to list, add them IF ( gpta > 0 ) THEN grid_list(gpil+1:gpil+gpta) = add_to_grid_list(1:gpta) gpil = gpil + gpta ENDIF ENDDO ENDIF ENDDO ENDDO DEALLOCATE(grid_list) ! !-- Set size of polygon array and initialize ALLOCATE(polygons(1:polygon_counter)) polygons%nov = 0 END SUBROUTINE identify_polygons !------------------------------------------------------------------------------! ! Description: ! ------------ !> Identifies the corners of the PALM building topography and adds them to !> a specific polygon for each building as vertices. This converts the gridded !> building data into one polygon per building that contains the coordinates of !> each inner and outer corner of that building as vertices. !> A grid point contains an outer corner if it's part of a building and exactly !> one of its horizontal and one of its vertical neighbors is also part of a !> building (4 cases). !> A grid point contains an inner corner if it's not part of a building and !> exactly one of its horizontal, one of its diagonal and one of its vertical !> neighbors are each part of a building and in turn neighbors !> to each other (4 cases). !------------------------------------------------------------------------------! SUBROUTINE identify_corners IMPLICIT NONE INTEGER(iwp) :: p_id !< current polygon_id ! !-- For all grid points, check whether it contains one or more corners DO i = 0, nx DO j = 0, ny ! !-- First, check if grid contains topography and has a corner. IF ( .NOT. BTEST( wall_flags_0(i,j), 0 ) ) THEN ! !-- Corner at south left edge of grid cell IF ( BTEST( wall_flags_0(i-1,j), 0 ) .AND. & BTEST( wall_flags_0(i,j-1), 0 )) & THEN p_id = grid(i,j)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, i*dx, j*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ! !-- Corner at north left edge of grid cell IF ( BTEST( wall_flags_0(i-1,j), 0 ) .AND. & BTEST( wall_flags_0(i,j+1), 0 )) & THEN p_id = grid(i,j)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, i*dx, (j+1)*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ! !-- Corner at north right edge of grid cell IF ( BTEST( wall_flags_0(i+1,j), 0 ) .AND. & BTEST( wall_flags_0(i,j+1), 0 )) & THEN p_id = grid(i,j)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, (i+1)*dx, (j+1)*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ! !-- Corner at south right edge of grid cell IF ( BTEST( wall_flags_0(i+1,j), 0 ) .AND. & BTEST( wall_flags_0(i,j-1), 0 )) & THEN p_id = grid(i,j)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, (i+1)*dx, j*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ! !-- Second, check if grid contains no topography and has a corner. ELSE ! !-- Corner at south left edge of grid cell IF ( .NOT. BTEST( wall_flags_0(i-1,j), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i,j-1), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i-1,j-1), 0 ) ) & THEN p_id = grid(i-1,j-1)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, i*dx, j*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ! !-- Corner at north left edge of grid cell IF ( .NOT. BTEST( wall_flags_0(i-1,j), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i,j+1), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i-1,j+1), 0 ) ) & THEN p_id = grid(i-1,j+1)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, i*dx, (j+1)*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ! !-- Corner at north right edge of grid cell IF ( .NOT. BTEST( wall_flags_0(i+1,j), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i,j+1), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i+1,j+1), 0 ) ) & THEN p_id = grid(i+1,j+1)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, (i+1)*dx, (j+1)*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ! !-- Corner at south right edge of grid cell IF ( .NOT. BTEST( wall_flags_0(i+1,j), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i,j-1), 0 ) .AND. & .NOT. BTEST( wall_flags_0(i+1,j-1), 0 ) ) & THEN p_id = grid(i+1,j-1)%polygon_id polygons(p_id)%nov = polygons(p_id)%nov + 1 nov = polygons(p_id)%nov CALL set_vertex(dummy_vertex, (i+1)*dx, j*dy) CALL add_vertex_to_polygon(dummy_vertex, p_id, nov) ENDIF ENDIF ENDDO ENDDO END SUBROUTINE identify_corners !------------------------------------------------------------------------------! ! Description: ! ------------ !> Initializes a vertex !------------------------------------------------------------------------------! SUBROUTINE set_vertex (in_vertex, x, y) IMPLICIT NONE REAL(wp) :: x !< x-coordinate of vertex position REAL(wp) :: y !< y-coordinate of vertex position TYPE(vertex_type) :: in_vertex !< vertex to be set in_vertex%delete = .FALSE. in_vertex%x = x in_vertex%y = y END SUBROUTINE set_vertex !------------------------------------------------------------------------------! ! Description: ! ------------ !> Adds an existing vertex to the polygon with ID p_id at position in_nov !------------------------------------------------------------------------------! SUBROUTINE add_vertex_to_polygon ( in_vertex, p_id, in_nov) IMPLICIT NONE INTEGER(iwp) :: in_nov !< counter of vertex being added to polygon INTEGER(iwp) :: p_id !< polygon ID INTEGER(iwp) :: sop !< size of vertices array TYPE(vertex_type) :: in_vertex !< vertex to be added TYPE(vertex_type), DIMENSION(:), ALLOCATABLE :: dummy_v_list !< for reallocation polygon => polygons(p_id) ! !-- Allocate and initialize the vertex array of the polygon, if necessary IF ( .NOT. ALLOCATED(polygon%vertices) ) THEN ALLOCATE(polygon%vertices(1:100)) polygon%vertices = null_vertex ENDIF ! !-- Adjust size of polygon, if necessary sop = SIZE(polygon%vertices) IF ( in_nov > sop ) THEN ALLOCATE(dummy_v_list(1:sop)) dummy_v_list(1:sop) = polygon%vertices(1:sop) DEALLOCATE(polygon%vertices) ALLOCATE(polygon%vertices(1:2*sop)) polygon%vertices = null_vertex polygon%vertices(1:sop) = dummy_v_list(1:sop) DEALLOCATE(dummy_v_list) ENDIF polygon%vertices(in_nov) = in_vertex END SUBROUTINE add_vertex_to_polygon !------------------------------------------------------------------------------! ! Description: ! ------------ !> Sorts the vertices of a polygon in a counter-clockwise fashion. During this !> process, all vertices that are not part of the hull of the building !> (inner courtyards) are deleted. !------------------------------------------------------------------------------! SUBROUTINE sort_polygon(i_p) IMPLICIT NONE LOGICAL :: starting_vertex_found INTEGER(iwp) :: counter !< counter for potential starting vertices INTEGER(iwp) :: id_neighbor !< final ID of neighboring vertex INTEGER(iwp) :: id_neighbor1 !< ID of first potential neighbor INTEGER(iwp) :: id_neighbor2 !< ID of second potential neighbor INTEGER(iwp) :: il !< local counter INTEGER(iwp) :: i_p !< index of the current polygon INTEGER(iwp) :: noc !< number of candidates INTEGER(iwp) :: nosv !< number of sorted vertices INTEGER(iwp) :: xe !< x-end-index for building search INTEGER(iwp) :: xs !< x-start-index for building search INTEGER(iwp) :: ye !< y-end-index for building search INTEGER(iwp) :: ys !< y-start-index for building search INTEGER, DIMENSION(:), ALLOCATABLE :: candidate_id !< ID of the potential neighbors stored in 'candidates' INTEGER, DIMENSION(:), ALLOCATABLE :: dummy_id_arr !< used for resizing REAL(wp) :: dist !< distance of one vertex to its neighbor REAL(wp) :: m_x !< min/max x-value of polygon used for starting vertex REAL(wp) :: m_y !< min/max y-value of polygon used for starting vertex TYPE(vertex_type) :: current_v !< current vertex TYPE(vertex_type) :: dummy_vertex !< dummy vertex for reordering TYPE(vertex_type), DIMENSION(:), ALLOCATABLE :: candidates !< potential neighbors of the current vertex TYPE(vertex_type), DIMENSION(:), ALLOCATABLE :: dummy_vertex_arr !< used for resizing TYPE(vertex_type), DIMENSION(:), ALLOCATABLE :: sorted_p !< vertices that have been sorted starting_vertex_found = .FALSE. ALLOCATE(sorted_p(1:nov)) sorted_p(1:nov) = polygon%vertices(1:nov) ! !-- Identify a vertex that is certainly a part of the outer hull of the !-- current polygon: Get rightmost border of polygon (or if that !-- coincides with model border, leftmost) border. Then of those points, !-- get northmost (or if that coincides with model domain border, southmost). !-- This identifies exactly one point that is then set to the first index. counter = 0 IF ( MAXVAL(sorted_p%x) < nx*dx ) THEN m_x = MAXVAL(sorted_p%x) ELSE m_x = MINVAL(sorted_p%x) ENDIF DO il = 1, nov IF ( ABS( sorted_p(il)%x - m_x ) < .01 * dx ) THEN counter = counter + 1 dummy_vertex = sorted_p(il) sorted_p(il) = sorted_p(counter) sorted_p(counter) = dummy_vertex ENDIF ENDDO IF ( MAXVAL(sorted_p(1:counter)%y) < ny*dy ) THEN m_y = MAXVAL(sorted_p(1:counter)%y) ELSE m_y = MINVAL(sorted_p(1:counter)%y) ENDIF DO il = 1, counter IF ( ABS(sorted_p(il)%y - m_y) < .01 * dy ) THEN dummy_vertex = sorted_p(il) sorted_p(il) = sorted_p(1) sorted_p(1) = dummy_vertex starting_vertex_found = .TRUE. EXIT ENDIF ENDDO ! !-- If no starting vertex was found for the current polygon, it will be !-- deleted and an error message thrown IF ( .NOT. starting_vertex_found ) THEN WRITE(*,'(A,/,A,1X,I6,/,A)') & 'An error occured during polygon sorting:', & 'no starting vertex could be found for polygon', & i_p, 'This polygon contains the following vertices (x/y)' DO il = 1, nov WRITE(*,'(4X,F8.1,1X,F8.1)') & polygon%vertices(il)%x, polygon%vertices(il)%x ENDDO WRITE(*,'(A,/,A)') & 'This polygon will be skipped during sorting and deleted',& 'For details on the procedure, see SUBROUTINE sort_polygon.' polygon%vertices%delete = .TRUE. polygons(i_p)%nov = 0 CALL delete_empty_polygons ! !-- Find the unique neighbor of the current vertex. For this, first !-- determine all possible candidates. Of those, keep only the ones that !-- are connected to the current vertex along a building edge (the polygon !-- is sorted counter-clockwise. Therefore, the building is always on the !-- left-hand side of the connecting line from the current vertex to its !-- potential neighbor). This leaves a maximum of two possible neighbors. !-- This is only the case if the current vertex is the point that diagonally !-- connects two parts of the same building. In that case, the vertex that !-- lies to the right of the connecting line between the previous and !-- current vertex is the neighbor. ELSE DO nosv = 1, nov current_v = sorted_p(nosv) noc = 0 ALLOCATE(candidates(1:100), candidate_id(1:100)) ! !-- Find all candidates that could be neighbors of current vertex: !-- these are those vertices that share the same x- or y-coordinate !-- with the current vertex, as the vertices are all inner and outer !-- corners of the gridded building data IF ( nosv < nov ) THEN DO il = nosv+1, nov IF ( ABS( current_v%x - sorted_p(il)%x ) < .01 * dx .OR. & ABS( current_v%y - sorted_p(il)%y ) < .01 * dy ) & THEN ! !-- If necessary, resize arrays for candidates IF ( noc >= SIZE(candidates) ) THEN ALLOCATE(dummy_vertex_arr(1:noc), dummy_id_arr(1:noc)) dummy_vertex_arr(1:noc) = candidates(1:noc) dummy_id_arr(1:noc) = candidate_id(1:noc) DEALLOCATE(candidates, candidate_id) ALLOCATE(candidates(1:2*noc), candidate_id(1:2*noc)) candidates(1:noc) = dummy_vertex_arr(1:noc) candidate_id(1:noc) = dummy_id_arr(1:noc) DEALLOCATE(dummy_vertex_arr, dummy_id_arr) ENDIF noc = noc +1 candidates(noc) = sorted_p(il) candidate_id(noc) = il ENDIF ENDDO ENDIF ! !-- Check which one of the candidates is the neighbor of the current !-- vertex. This is done by several tests that would exclude the !-- candidate from being the neighbor. Each successful test will !-- therefore result in a cycle to the next candidate. Only if all !-- all tests fail, is the candidate one of a maximum of two possible !-- neighbors. id_neighbor = -999 id_neighbor1 = -999 id_neighbor2 = -999 DO il = 1, noc ! !-- Exclude the possibility of a vertex with the same coordinates !-- being chosen as the neighbor. (dist < .9*dx) !-- NOTE: this could happen, if part of a building is only connected !-- to the rest of the building diagonally. In that case, the !-- same point is added to the polygon twice. This is necessary !-- and not redundant! Two such points can never be neighbors. !-- Example: the north right corner of grid point i,j !-- AND the south left corner of grid point i+1,j+1. !-- See SUBROUTINE identify_corners for the identification !-- method. !-- Also, exclude a connection back to the coordinates of the !-- previous vertex. dist = SQRT( (candidates(il)%x - current_v%x)**2 + & (candidates(il)%y - current_v%y)**2 ) IF ( nosv > 1 ) THEN IF ( dist < .9 * dx .OR. & ( ( ABS( sorted_p(nosv-1)%x & - candidates(il)%x ) < .01 * dx ) .AND. & ( ABS( sorted_p(nosv-1)%y & - candidates(il)%y ) < .01 * dy ) ) ) & THEN CYCLE ENDIF ENDIF ! !-- Check if there is a building all along only the left-hand side !-- of the connecting line from current vertex to potential neighbor !-- (4 cases) !-- First: for vertical connection IF ( ABS( candidates(il)%x - current_v%x ) < .01 * dx ) THEN xs = NINT(current_v%x*ddx)-1 xe = xs + 1 ! !-- Case 1: ys < ye, edge from south to north, building must be !-- exclusively in all grid cells left of the edge IF ( current_v%y < candidates(il)%y ) THEN ys = NINT(current_v%y*ddy) ye = NINT(candidates(il)%y*ddy)-1 IF ( .NOT.( ALL( .NOT. BTEST( wall_flags_0(xs,ys:ye), 0))& .AND.( ALL( BTEST( wall_flags_0(xe,ys:ye), 0 ) ) )))& THEN CYCLE ENDIF ! !-- Case 2: ys > ye, edge from north to south, building must be !-- exclusively in all grid cells right of the edge ELSEIF ( current_v%y > candidates(il)%y ) THEN ys = NINT(current_v%y*ddy)-1 ye = NINT(candidates(il)%y*ddy) IF ( .NOT.( ALL( .NOT. BTEST( wall_flags_0(xe,ye:ys), 0))& .AND.( ALL( BTEST( wall_flags_0(xs,ye:ys), 0 ) ) )))& THEN CYCLE ENDIF ENDIF ! !-- Horizontal connection ELSEIF ( ABS( candidates(il)%y - current_v%y ) < .01 * dy ) THEN ys = NINT(current_v%y*ddy)-1 ye = ys + 1 ! !-- Case 3: xs > xe, edge from right to left, building must be !-- exclusively in all grid cells south of the edge IF ( current_v%x > candidates(il)%x ) THEN xs = NINT(current_v%x*ddx)-1 xe = NINT(candidates(il)%x*ddx) IF ( .NOT.( ALL( .NOT. BTEST( wall_flags_0(xe:xs,ys), 0))& .AND.( ALL( BTEST( wall_flags_0(xe:xs,ye), 0 ) ) )))& THEN CYCLE ENDIF ! !-- Case 4: xs < xe, edge from left to right, building must be !-- exclusively in all grid cells north of the edge ELSEIF ( current_v%x < candidates(il)%x ) THEN xs = NINT(current_v%x*ddx) xe = NINT(candidates(il)%x*ddx)-1 IF ( .NOT.( ALL( .NOT. BTEST( wall_flags_0(xs:xe,ye), 0))& .AND.( ALL( BTEST( wall_flags_0(xs:xe,ys), 0 ) ) )))& THEN CYCLE ENDIF ENDIF ENDIF ! !-- After the tests, only two potential neighbors are possible. The !-- one found first will get id_neighbor1, the possible 2nd one will !-- get id_neighbor2 IF ( id_neighbor1 == -999 ) THEN id_neighbor1 = candidate_id(il) ELSEIF ( id_neighbor1 /= -999 .AND. & ( ( ABS( sorted_p(id_neighbor1)%x - candidates(il)%x ) & > .01 * dx ) .OR. & ( ABS( sorted_p(id_neighbor1)%y - candidates(il)%y ) & > .01 * dy ) ) ) & THEN id_neighbor2 = candidate_id(il) ENDIF ENDDO ! !-- If two potential neighbors were found, determine the one that is on !-- the right hand side of the line connecting the current and previous !-- vertex. It is the real neighbor. IF ( id_neighbor2 /= -999 .AND. nosv > 1 ) THEN IF ( is_right(sorted_p(nosv-1)%x,sorted_p(nosv-1)%y, & current_v%x,current_v%y, & sorted_p(id_neighbor1)%x,sorted_p(id_neighbor1)%y) )& THEN id_neighbor = id_neighbor1 ELSEIF ( is_right(sorted_p(nosv-1)%x,sorted_p(nosv-1)%y, & current_v%x,current_v%y, & sorted_p(id_neighbor2)%x,sorted_p(id_neighbor2)%y) )& THEN id_neighbor = id_neighbor2 ENDIF ELSE id_neighbor = id_neighbor1 ENDIF ! !-- Put the found neighbor at next index in sorted array and move the !-- unsorted vertices back one index. This way, only yet unsorted !-- vertices are eligible to be candidates during the next iteration. IF (id_neighbor /= nosv + 1 .AND. id_neighbor /= -999) THEN dummy_vertex = sorted_p(id_neighbor) sorted_p(nosv+2:id_neighbor) = sorted_p(nosv+1:id_neighbor-1) sorted_p(nosv+1) = dummy_vertex ! !-- If no neighbor was found, sorting is done for this polygon ELSEIF ( id_neighbor == -999 ) THEN DEALLOCATE(candidates,candidate_id) EXIT ENDIF DEALLOCATE(candidates,candidate_id) ENDDO ! !-- Sorting is done. Reduce size (which means get rid of vertices !-- that are not part of the outer hull of the building: holes) !-- of sorted polygon and put it back in polygon%vertices. !-- Also add first vertex to the end of polygon and last vertex !-- before the beginning of polygon. DEALLOCATE(polygon%vertices) ALLOCATE(polygon%vertices(0:nosv+1)) polygon%vertices(1:nosv) = sorted_p(1:nosv) polygon%vertices(0) = sorted_p(nosv) polygon%vertices(nosv+1) = sorted_p(1) polygons(i_p)%nov = nosv nov = polygons(i_p)%nov DEALLOCATE(sorted_p) ENDIF END SUBROUTINE sort_polygon !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reduces the number of vertices in a polygon using the !> Douglas-Poiker-Algorithm (1973) !------------------------------------------------------------------------------! RECURSIVE SUBROUTINE simplify_polygon( id_s, id_e, tol ) IMPLICIT NONE INTEGER(iwp) :: max_dist_ind !< Index of vertex with maximum distance INTEGER(iwp) :: il !< counter INTEGER(iwp) :: id_s !< End index in polygon INTEGER(iwp) :: id_e !< End index in polygon REAL(wp) :: max_dist !< Maximum distance from line REAL(wp) :: dum_dist !< Distance from line: dummy REAL(wp) :: tol !< factor that determines how far a vertex can be from the polygon approximation so that the approximation is still accepted max_dist = 0. max_dist_ind = -999999 ! !-- Find vertex with max distance to id_s and id_e DO il = id_s + 1, id_e -1 dum_dist = dist_point_to_edge(polygon%vertices(id_s)%x, & polygon%vertices(id_s)%y, & polygon%vertices(id_e)%x, & polygon%vertices(id_e)%y, & polygon%vertices(il)%x, & polygon%vertices(il)%y) IF ( dum_dist > max_dist ) THEN max_dist = dum_dist max_dist_ind = il ENDIF ENDDO IF ( max_dist > tol ) THEN CALL simplify_polygon( id_s, max_dist_ind, tol ) CALL simplify_polygon( max_dist_ind, id_e, tol ) ELSE polygon%vertices(id_s+1:id_e-1)%delete = .TRUE. ENDIF END SUBROUTINE simplify_polygon !------------------------------------------------------------------------------! ! Description: ! ------------ !> Checks if a vertex of a polygon is inside another polygon and if so, deletes !> it. The check is done using the crossing number algorithm. If a straight !> ray starting at a point crosses the borders of one polygon an odd !> number of times, the point is inside that polygon. !> This algorithm detects buildings that are completely surrounded by !> another building. They can be deleted since they can never be navigated. !> TODO: Maybe add a flag to turn this off and on as it might not be needed. !> also, if the domain has buildings at all boundary points, there would !> only be one giant building and everything in it deleted. So nothing !> could be navigated. relevant?! !------------------------------------------------------------------------------! SUBROUTINE inside_other_polygon( i_p ) IMPLICIT NONE LOGICAL :: exit_flag !< flag to exit loops if an odd crossing number was found for any of a polygons vertices INTEGER(iwp) :: cn !< number of crossings INTEGER(iwp) :: i_p !< index of current polygon INTEGER(iwp) :: il !< index of tested polygon INTEGER(iwp) :: nov_test !< no. of vertices of test-polygon INTEGER(iwp) :: ref_vert !< vertex currently being tested if it is inside another polygon INTEGER(iwp) :: test_edge !< index of edge being tested REAL(wp) :: px !< x-coord of the point at the crossing of the ray and the vertex REAL(wp) :: xe !< x-coordinate of end point of edge REAL(wp) :: xr !< x-coordinate of reference point REAL(wp) :: xs !< x-coordinate of start point of edge REAL(wp) :: ye !< y-coordinate of end point of edge REAL(wp) :: yr !< y-coordinate of reference point REAL(wp) :: ys !< y-coordinate of start point of edge TYPE(polygon_type), POINTER :: test_pol !< Polygon to be tested exit_flag = .FALSE. ! !-- Loop over all polygons other than the one being tested DO il = 1, polygon_counter IF ( il == i_p ) CYCLE test_pol => polygons(il) nov_test = polygons(il)%nov ! !-- Inclusion test is done for every vertex of the polygon DO ref_vert = 1, nov cn = 0 xr = polygon%vertices(ref_vert)%x yr = polygon%vertices(ref_vert)%y ! !-- All edges of the every polygon il is tested for ray crossing DO test_edge = 1, nov_test !-- It is tested wether the current edge crosses a ray that extends !-- from the current point to the right indefinitely. !-- Check if start point of edge is lower than end point. If they !-- are the same, ignore, since horizontal edges are excluded IF ( test_pol%vertices(test_edge)%y < & test_pol%vertices(test_edge+1)%y ) & THEN xs = test_pol%vertices(test_edge)%x xe = test_pol%vertices(test_edge+1)%x ys = test_pol%vertices(test_edge)%y ye = test_pol%vertices(test_edge+1)%y ELSEIF ( test_pol%vertices(test_edge)%y > & test_pol%vertices(test_edge+1)%y ) & THEN xs = test_pol%vertices(test_edge+1)%x xe = test_pol%vertices(test_edge)%x ys = test_pol%vertices(test_edge+1)%y ye = test_pol%vertices(test_edge)%y ELSE CYCLE ENDIF ! !-- Only such edges where the starting point of the edge is south of !-- (or equal to) the reference point and the end point is north of !-- it are relevant. Note: an edge includes its southern endpoint !-- and excludes its northern endpoint. IF ( .NOT. (ys <= yr .AND. ye > yr )) CYCLE ! !-- Only edges that are crossed on the right side of the reference !-- point are relevant, those on the left are ignored IF ( xs <= xr .AND. xe <= xr ) CYCLE IF ( ( xs <= xr .AND. xe >= xr ) .OR. & ( xs >= xr .AND. xe <= xr ) ) & THEN px = xe - (xe-xs)*(ye-yr)/(ye-ys) IF ( px <= xr ) CYCLE ENDIF ! !-- If none of the previous if clauses were true, a crossing with !-- an eligible edge was found and the count increases cn = cn + 1 ENDDO ! !-- If the number of crossings is odd, the point is inside another !-- polyon. The polygon associated with the point will be deleted IF ( MOD(cn, 2) /= 0 ) THEN exit_flag = .TRUE. EXIT ENDIF ENDDO IF ( exit_flag ) EXIT ENDDO IF ( exit_flag ) polygon%vertices%delete = .TRUE. END SUBROUTINE inside_other_polygon !------------------------------------------------------------------------------! ! Description: ! ------------ !> Deletes thoses vertices that are marked for deletion (%delete flag) and !> resizes the polygon !------------------------------------------------------------------------------! SUBROUTINE delete_extra_vertices (i_p) IMPLICIT NONE INTEGER(iwp) :: il !< local counter INTEGER(iwp) :: vcounter !< vertex counter INTEGER(iwp) :: i_p !< polygon ID TYPE(vertex_type), DIMENSION(:), ALLOCATABLE :: dummy_pol !< Temporarily stores non-deleted vertices ALLOCATE(dummy_pol(1:nov)) vcounter = 0 ! !-- Check all vertices and only keep those not marked for deletion DO il = 1, nov IF ( .NOT. polygon%vertices(il)%delete ) THEN vcounter = vcounter + 1 dummy_pol(vcounter) = polygon%vertices(il) ENDIF ENDDO ! !-- Set new number of vertices in the polygon nov = vcounter polygons(i_p)%nov = nov ! !-- Resize DEALLOCATE(polygon%vertices) ALLOCATE(polygon%vertices(0:nov+1)) polygon%vertices(1:nov) = dummy_pol(1:nov) polygon%vertices(0) = polygon%vertices(nov) polygon%vertices(nov+1) = polygon%vertices(1) DEALLOCATE(dummy_pol) END SUBROUTINE delete_extra_vertices !------------------------------------------------------------------------------! ! Description: ! ------------ !> Deletes polygons that contain no vertices (happens for those polygons that !> were entirely encompassed by another polygon) !------------------------------------------------------------------------------! SUBROUTINE delete_empty_polygons IMPLICIT NONE INTEGER(iwp) :: il !< local counter INTEGER(iwp) :: pc !< number of nonempty polygons INTEGER(iwp) :: sv !< size of vertex array TYPE(polygon_type), DIMENSION(:), ALLOCATABLE :: dummy_polygons !< temporarily stores non-deletd polygons pc = 0 sv = 0 ALLOCATE( dummy_polygons(1:polygon_counter) ) ! !-- Keep only those polygons that contain any vertices, skip the rest DO il = 1, polygon_counter IF ( polygons(il)%nov > 0 ) THEN pc = pc + 1 sv = SIZE(polygons(il)%vertices) ALLOCATE(dummy_polygons(pc)%vertices(0:sv-1)) dummy_polygons(pc) = polygons(il) ENDIF ENDDO polygon_counter = pc ! !-- Resize polygon array DEALLOCATE(polygons) ALLOCATE(polygons(1:polygon_counter)) DO il = 1, polygon_counter ! !-- give each %vertices array the correct size and information sv = SIZE(dummy_polygons(il)%vertices) polygons(il)%nov = sv - 2 ALLOCATE(polygons(il)%vertices(0:sv-1)) polygons(il) = dummy_polygons(il) ENDDO DEALLOCATE(dummy_polygons) END SUBROUTINE delete_empty_polygons END MODULE polygon_creation MODULE mesh_creation USE kinds USE mod_functions USE variables CONTAINS !------------------------------------------------------------------------------! ! Description: ! ------------ !> Creates the navigation mesh: !> 1) Finds eligible vertices (those that are locally convex) !> 2) Adds them to the mesh !> 3) Adds connections between mesh points if they are in line of sight !> of each other and the connecting line does not point into either of !> the originating polygons (this is known as a visibility graph) !------------------------------------------------------------------------------! SUBROUTINE create_nav_mesh IMPLICIT NONE LOGICAL :: add !< flag for second cycle of add loop LOGICAL :: intersection_found !< flag to indicate a found intersection INTEGER(iwp) :: cmp !< counter: current mesh point INTEGER(iwp) :: il !< local counter INTEGER(iwp) :: jl !< local counter INTEGER(iwp) :: pid !< polygon id of current mesh point INTEGER(iwp) :: pid_t !< polygon id of tested mesh point INTEGER(iwp) :: pl !< polygon counter INTEGER(iwp) :: vid !< vertex id of current mesh point INTEGER(iwp) :: vid_t !< vertex id of tested mesh point INTEGER(iwp) :: vl !< vertex counter REAL(wp) :: v1x !< x-coordinate of test vertex 1 for intersection test REAL(wp) :: v1y !< y-coordinate of test vertex 1 for intersection test REAL(wp) :: v2x !< x-coordinate of test vertex 2 for intersection test REAL(wp) :: v2y !< y-coordinate of test vertex 2 for intersection test REAL(wp) :: x !< x-coordinate of current mesh point REAL(wp) :: x_t !< x-coordinate of tested mesh point REAL(wp) :: y !< y-coordinate of current mesh point REAL(wp) :: y_t !< y-coordinate of tested mesh point REAL(wp) :: corner_x !< x-coordinate of shifted corner REAL(wp) :: corner_x_e !< x-coordinate of end of corner gate REAL(wp) :: corner_y !< y-coordinate of shifted corner REAL(wp) :: corner_y_e !< y-coordinate of end of corner gate REAL(wp) :: t_start !< CPU measure: start REAL(wp) :: t_inter !< CPU measure: output test time REAL(wp) :: t_inter1 !< CPU measure: output test time REAL(wp) :: t_end !< CPU measure: end REAL(wp) :: t_left !< CPU measure: estimate for time left REAL(wp) :: t_done !< CPU measure: elapsed time REAL(wp) :: percent_done !< CPU measure: proportion of mesh points checked ! !-- Add all convex vertices to the mesh. !-- DO loop will be executed twice. Once to count the mesh points to be !-- added and allocate the mesh point array, the second time (add == .TRUE.) !-- to fill the mesh point array. WRITE(*,'(1X,A)') 'Adding polygon vertices to mesh ...' add = .FALSE. DO cmp = 0 DO il = 1, polygon_counter polygon => polygons(il) nov = polygons(il)%nov DO jl = 1, nov ! !-- In a polygon that is sorted counter-clockwise, if the next vertex !-- is left of the line connecting the previous and the current vertex, !-- the current vertex is locally convex. IF ( is_left(polygon%vertices(jl-1)%x,polygon%vertices(jl-1)%y, & polygon%vertices(jl)%x,polygon%vertices(jl)%y, & polygon%vertices(jl+1)%x,polygon%vertices(jl+1)%y) ) & THEN corner_x = polygon%vertices(jl)%x corner_y = polygon%vertices(jl)%y ! !-- Create end point for corner navigation IF ( add ) THEN CALL shift_corner_outward( & polygon%vertices(jl-1)%x, polygon%vertices(jl-1)%y,& polygon%vertices(jl+1)%x, polygon%vertices(jl+1)%y,& polygon%vertices(jl)%x, polygon%vertices(jl)%y, & corner_x_e, corner_y_e, 1._wp ) ENDIF ! !-- Disregard corners outside of the domain IF ( corner_x<=(nx+1)*dx .AND. corner_x>=0 .AND. & corner_y<=(ny+1)*dy .AND. corner_y>=0) & THEN cmp = cmp + 1 IF ( add ) THEN CALL set_mesh_point( mesh(cmp), il, jl, & corner_x, corner_y, & corner_x_e, corner_y_e ) ENDIF ENDIF ENDIF ENDDO ENDDO IF ( add ) EXIT add = .TRUE. ALLOCATE( mesh(1:cmp) ) ENDDO WRITE(*,'(6X,A,1X,I10,1X,A,/)') 'Done. Added',cmp,'vertices to mesh.' WRITE(*,'(1X,A)') 'Establishing connections in mesh ...' ! !-- CPU measurement CALL CPU_TIME(t_start) CALL CPU_TIME(t_inter) DO il = 1, cmp !-- Output status of processing CALL CPU_TIME(t_inter1) IF ( t_inter1 - t_inter > 4. ) THEN t_done = (t_inter1-t_start)/60. percent_done = REAL(il)/cmp*100. t_left = t_done/percent_done*(100-percent_done) WRITE(*,'(3X,2(A,I8),A,F6.2,2(A,F7.1),A,I10)') & 'Mesh point ',il,' of ' ,cmp, & ': ' ,percent_done, & ' % || elapsed time : ' ,t_done, & ' min || ETA: ' ,t_left, & ' min || number of connections found: ',number_of_connections CALL CPU_TIME(t_inter) ENDIF x = mesh(il)%x y = mesh(il)%y pid = mesh(il)%polygon_id vid = mesh(il)%vertex_id DO jl = 1, cmp ! !-- No mesh point can be connected to itself IF ( il == jl ) CYCLE x_t = mesh(jl)%x y_t = mesh(jl)%y pid_t = mesh(jl)%polygon_id vid_t = mesh(jl)%vertex_id ! !-- Cycle, if a connection had already been established IF ( ANY(mesh(jl)%connected_vertices == il) ) CYCLE ! !-- If the distance between two nodes is larger than 600 m, !-- no connection will be made since there will typically no be such !-- long, straight ways in a city that a pedestrian will walk IF ( SQRT((x_t-x)**2 +(y_t-y)**2) > 400. ) CYCLE ! !-- If the connecting line between two mesh points points into either !-- or both of the corresponding polygons, no connection will be !-- established between the two points. This is the case if the !-- previous (next) vertex of the polygon is right of the connecting !-- line and the next (previous) vertex of the polygon is left of the !-- connecting line. This is checked for both polygons. IF ( ((is_left(x_t,y_t,x,y,polygons(pid)%vertices(vid-1)%x, & polygons(pid)%vertices(vid-1)%y) & .AND. is_right(x_t,y_t,x,y,polygons(pid)%vertices(vid+1)%x, & polygons(pid)%vertices(vid+1)%y) ) & .OR. (is_right(x_t,y_t,x,y,polygons(pid)%vertices(vid-1)%x, & polygons(pid)%vertices(vid-1)%y) & .AND. is_left(x_t,y_t,x,y,polygons(pid)%vertices(vid+1)%x, & polygons(pid)%vertices(vid+1)%y)) ) & .OR. ((is_left(x,y,x_t,y_t,polygons(pid_t)%vertices(vid_t-1)%x, & polygons(pid_t)%vertices(vid_t-1)%y) & .AND. is_right(x,y,x_t,y_t,polygons(pid_t)%vertices(vid_t+1)%x, & polygons(pid_t)%vertices(vid_t+1)%y) ) & .OR. (is_right(x,y,x_t,y_t,polygons(pid_t)%vertices(vid_t-1)%x, & polygons(pid_t)%vertices(vid_t-1)%y) & .AND. is_left(x,y,x_t,y_t,polygons(pid_t)%vertices(vid_t+1)%x, & polygons(pid_t)%vertices(vid_t+1)%y)) ) ) & THEN CYCLE ENDIF ! !-- For each edge of each polygon, check if it intersects with the !-- potential connection. If so, no connection can be made !-- THIS IS THE BOTTLENECK OF THE PROGRAM intersection_found = .FALSE. DO pl = pid, polygon_counter DO vl = 1, polygons(pl)%nov v1x = polygons(pl)%vertices(vl)%x v1y = polygons(pl)%vertices(vl)%y v2x = polygons(pl)%vertices(vl+1)%x v2y = polygons(pl)%vertices(vl+1)%y intersection_found = intersect(x,y,x_t,y_t,v1x,v1y,v2x,v2y) IF ( intersection_found ) EXIT ENDDO IF ( intersection_found ) EXIT ENDDO IF ( intersection_found ) CYCLE DO pl = pid, 1, -1 IF ( pl == pid ) CYCLE DO vl = 1, polygons(pl)%nov v1x = polygons(pl)%vertices(vl)%x v1y = polygons(pl)%vertices(vl)%y v2x = polygons(pl)%vertices(vl+1)%x v2y = polygons(pl)%vertices(vl+1)%y intersection_found = intersect(x,y,x_t,y_t,v1x,v1y,v2x,v2y) IF ( intersection_found ) EXIT ENDDO IF ( intersection_found ) EXIT ENDDO IF ( intersection_found ) CYCLE ! !-- If neither of the above two test was true, a connection will be !-- established between the two mesh points. number_of_connections = number_of_connections + 1 CALL add_connection(mesh(il),jl, mesh(jl)) CALL add_connection(mesh(jl),il, mesh(il)) ENDDO ENDDO ! !-- Adapt connected_vertices arrays DO il = 1, cmp CALL reduce_connections(mesh(il)) ENDDO CALL CPU_TIME(t_end) ! !-- Output to terminal WRITE(*,'(6X,A,I10,A)') 'Done. Established ',number_of_connections, & ' connections in mesh' WRITE(*,'(6X,A,F10.1,A)') 'Time needed for calculation: ', & t_end-t_start,' seconds' END SUBROUTINE create_nav_mesh !------------------------------------------------------------------------------! ! Description: ! ------------ !> Initializes a point of the navigation mesh !------------------------------------------------------------------------------! SUBROUTINE set_mesh_point (in_mp,pid,vid,x,y,x_s,y_s) IMPLICIT NONE INTEGER(iwp) :: pid !< polygon ID INTEGER(iwp) :: vid !< vertex ID REAL(wp) :: x !< x-value of mesh point for path calculation REAL(wp) :: x_s !< x-value shifted outward from corner REAL(wp) :: y !< y-value of mesh point for path calculation REAL(wp) :: y_s !< y-value shifted outward from corner TYPE(mesh_point) :: in_mp !< mesh point to be created in_mp%origin_id = -1 in_mp%polygon_id = pid in_mp%vertex_id = vid in_mp%cost_so_far = 1.d12 in_mp%x = x in_mp%y = y in_mp%x_s = x_s in_mp%y_s = y_s in_mp%noc = 0 ALLOCATE(in_mp%connected_vertices(1:100), & in_mp%distance_to_vertex(1:100)) in_mp%connected_vertices = -999 in_mp%distance_to_vertex = -999. END SUBROUTINE set_mesh_point !------------------------------------------------------------------------------! ! Description: ! ------------ !> Shifts a corner (middle one of three consecutive points a, b and p) outward !> by a given length along the angle bisector. Stores the result to res_x/res_y !------------------------------------------------------------------------------! SUBROUTINE shift_corner_outward ( a_x, a_y, b_x, b_y, p_x, p_y, res_x, & res_y, shift ) IMPLICIT NONE REAL(wp) :: a_x !< x-value of point A REAL(wp) :: a_y !< y-value of point A REAL(wp) :: abs_ap !< distance from A to P REAL(wp) :: abs_bp !< distance from B to P REAL(wp) :: abs_co !< length of angle bisector REAL(wp) :: b_x !< x-value of point B REAL(wp) :: b_y !< y-value of point B REAL(wp) :: eap_x !< x-value of unit vector from A to P REAL(wp) :: eap_y !< y-value of unit vector from A to P REAL(wp) :: ebp_x !< x-value of unit vector from B to P REAL(wp) :: ebp_y !< y-value of unit vector from B to P REAL(wp) :: p_x !< x-value of point P REAL(wp) :: p_y !< y-value of point P REAL(wp) :: res_x !< x-value of result REAL(wp) :: res_y !< y-value of result REAL(wp) :: shift !< distance of shift in meters ! !-- Get unit vector from previous to current vertex eap_x = p_x - a_x eap_y = p_y - a_y abs_ap = SQRT(eap_x**2+eap_y**2) eap_x = eap_x/abs_ap eap_y = eap_y/abs_ap ! !-- Get unit vector from next to current vertex ebp_x = p_x - b_x ebp_y = p_y - b_y abs_bp = SQRT(ebp_x**2+ebp_y**2) ebp_x = ebp_x/abs_bp ebp_y = ebp_y/abs_bp ! !-- Add previous two vectors to get angle bisector of corner. !-- Then, set its length to shift and add to original vertex !-- vector to shift it outward res_x = eap_x + ebp_x res_y = eap_y + ebp_y abs_co = SQRT(res_x**2+res_y**2) res_x = shift*res_x/abs_co + p_x res_y = shift*res_y/abs_co + p_y END SUBROUTINE shift_corner_outward !------------------------------------------------------------------------------! ! Description: ! ------------ !> Adds a connection between two points of the navigation mesh !> (one-way: in_mp1 to in_mp2) !------------------------------------------------------------------------------! SUBROUTINE add_connection (in_mp1,id2,in_mp2) IMPLICIT NONE LOGICAL :: connection_established !< Flag to indicate if connection has already been established INTEGER(iwp) :: id2 !< ID of in_mp2 INTEGER(iwp) :: il !< local counter INTEGER(iwp) :: noc1 !< number of connections in in_mp1 INTEGER, DIMENSION(:), ALLOCATABLE :: dum_cv !< dummy array for connected_vertices REAL(wp) :: dist !< Distance between the two points REAL(wp), DIMENSION(:), ALLOCATABLE :: dum_dtv TYPE(mesh_point) :: in_mp1 !< mesh point that gets a new connection TYPE(mesh_point) :: in_mp2 !< mesh point in_mp1 will be connected to connection_established = .FALSE. ! !-- Check if connection has already been established noc1 = SIZE(in_mp1%connected_vertices) DO il = 1, in_mp1%noc IF ( in_mp1%connected_vertices(il) == id2 ) THEN connection_established = .TRUE. EXIT ENDIF ENDDO IF ( .NOT. connection_established ) THEN ! !-- Resize arrays, if necessary IF ( in_mp1%noc >= noc1 ) THEN ALLOCATE( dum_cv(1:noc1),dum_dtv(1:noc1) ) dum_cv = in_mp1%connected_vertices dum_dtv = in_mp1%distance_to_vertex DEALLOCATE( in_mp1%connected_vertices, in_mp1%distance_to_vertex ) ALLOCATE( in_mp1%connected_vertices(1:2*noc1), & in_mp1%distance_to_vertex(1:2*noc1) ) in_mp1%connected_vertices = -999 in_mp1%distance_to_vertex = -999. in_mp1%connected_vertices(1:noc1) = dum_cv in_mp1%distance_to_vertex(1:noc1) = dum_dtv ENDIF ! !-- Add connection in_mp1%noc = in_mp1%noc+1 dist = SQRT( (in_mp1%x - in_mp2%x)**2 + (in_mp1%y - in_mp2%y)**2 ) in_mp1%connected_vertices(in_mp1%noc) = id2 in_mp1%distance_to_vertex(in_mp1%noc) = dist ENDIF END SUBROUTINE add_connection !------------------------------------------------------------------------------! ! Description: ! ------------ !> Reduces the size of connection array to the amount of actual connections !> after all connetions were added !------------------------------------------------------------------------------! SUBROUTINE reduce_connections (in_mp) IMPLICIT NONE INTEGER(iwp) :: noc !< Number of connections INTEGER, DIMENSION(:), ALLOCATABLE :: dum_cv !< dummy: connected_vertices REAL(wp), DIMENSION(:), ALLOCATABLE :: dum_dtv !< dummy: distance_to_vertex TYPE(mesh_point) :: in_mp !< Input mesh point noc = in_mp%noc ALLOCATE( dum_cv(1:noc),dum_dtv(1:noc) ) dum_cv = in_mp%connected_vertices(1:noc) dum_dtv = in_mp%distance_to_vertex(1:noc) DEALLOCATE( in_mp%connected_vertices, in_mp%distance_to_vertex ) ALLOCATE( in_mp%connected_vertices(1:noc), & in_mp%distance_to_vertex(1:noc) ) in_mp%connected_vertices(1:noc) = dum_cv(1:noc) in_mp%distance_to_vertex(1:noc) = dum_dtv(1:noc) END SUBROUTINE reduce_connections !------------------------------------------------------------------------------! ! Description: ! ------------ !> Writes all NavMesh information into binary file and building data to ASCII !------------------------------------------------------------------------------! SUBROUTINE bin_out_mesh IMPLICIT NONE INTEGER(iwp) :: il !< local counter INTEGER(iwp) :: jl !< local counter INTEGER(iwp) :: size_of_mesh !< size of mesh INTEGER(iwp) :: size_of_pols !< size of polygon WRITE(*,'(1X,A)') 'Writing binary output data ...' OPEN ( 14, FILE= TRIM(runname)//'_nav', FORM='UNFORMATTED', STATUS='replace' ) ! !-- Output of mesh data size_of_mesh = SIZE(mesh) WRITE(14) size_of_mesh DO il = 1, size_of_mesh WRITE(14) mesh(il)%polygon_id, mesh(il)%vertex_id, mesh(il)%noc, & mesh(il)%origin_id, mesh(il)%cost_so_far, mesh(il)%x, & mesh(il)%y, mesh(il)%x_s, mesh(il)%y_s DO jl = 1, mesh(il)%noc WRITE(14) mesh(il)%connected_vertices(jl), & mesh(il)%distance_to_vertex(jl) ENDDO ENDDO ! !-- Output of building polygon data size_of_pols = SIZE(polygons) WRITE(14) size_of_pols DO il = 1, size_of_pols WRITE(14) polygons(il)%nov DO jl = 0, polygons(il)%nov+1 WRITE(14) polygons(il)%vertices(jl)%delete, & polygons(il)%vertices(jl)%x, polygons(il)%vertices(jl)%y ENDDO ENDDO CLOSE(14) ! !-- Output building data to ASCII file OPEN(UNIT=7,FILE='topo.txt',STATUS='replace',ACTION='write') DO i = 1, polygon_counter IF (polygons(i)%nov == 0) CYCLE DO j = 1, polygons(i)%nov WRITE(7,150) i,j,polygons(i)%vertices(j)%x, & polygons(i)%vertices(j)%y ENDDO ENDDO CLOSE(7) WRITE(*,'(6X,A)') 'Done, tool terminating.', ' ', & 'Before starting your PALM run, please check the', & 'ASCII file topo.txt to see if you are satisfied', & 'with the polygon representation of the building', & 'data. If not, consider adjusting the parameter', & 'tolerance_dp accordingly.', ' ', 'Bye, Bye!', ' ' CALL CPU_TIME(finish) WRITE(*,'(1X,A,F10.4,A)') 'Total runtime: ', finish-start, ' seconds' 150 FORMAT (2(I7,1X),2(F9.2,1X) ) END SUBROUTINE bin_out_mesh END MODULE mesh_creation PROGRAM nav_mesh USE mesh_creation USE polygon_creation USE variables IMPLICIT NONE ! !-- Start CPU mesurement CALL CPU_TIME(start) ! !-- Initialization CALL init WRITE(*,*) "Converting building data to polygons ..." ! !-- Convert gridded building data to polygons CALL identify_polygons ! !-- Find corners in topography and add them to polygons CALL identify_corners ! !-- Sort polygons counter-clockwise, then simplify them DO i = 1, polygon_counter polygon => polygons(i) nov = polygons(i)%nov CALL sort_polygon(i) ! !-- Simplify each polygon using douglas-peucker algorithm. If the number !-- of vertices would fall below 4 due to this procedure, the tolerance !-- for the algorithm is reduced and it is run again. DO i_sc = 0, 2 CALL simplify_polygon(1,nov+1,tolerance_dp(i_sc)) i_cn = 0 DO j = 1, nov IF ( .NOT. polygon%vertices(j)%delete ) i_cn = i_cn + 1 ENDDO IF ( i_cn > 3 ) THEN EXIT ELSE polygon%vertices(:)%delete = .FALSE. ENDIF ENDDO CALL delete_extra_vertices(i) ENDDO ! !-- Remove buildings that are surrounded by another building IF ( .NOT. internal_buildings ) THEN DO i = 1, polygon_counter polygon => polygons(i) nov = polygons(i)%nov CALL inside_other_polygon(i) ENDDO ENDIF ! !-- Delete vertices that are marked for deletion DO i = 1, polygon_counter polygon => polygons(i) nov = polygons(i)%nov CALL delete_extra_vertices(i) ENDDO ! !-- Count number of vertices vertex_counter = 0 DO i = 1, polygon_counter polygon => polygons(i) nov = polygons(i)%nov vertex_counter = vertex_counter + nov ENDDO ! !-- Delete polygons with no vertices CALL delete_empty_polygons WRITE(*,'(2(6X,A,I10,1X,A,/))') & 'Done. Created a total of', polygon_counter, 'polygon(s)', & ' with a total of', vertex_counter, 'vertices' ! !-- Crate Navigation mesh from polygon data CALL create_nav_mesh ! !-- Binary mesh output CALL bin_out_mesh END PROGRAM nav_mesh