114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/**************************************************************************
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* mesh.c -- data structures and routines for processing terrain meshes
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*
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* Written by Curtis Olson, started May 1997.
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*
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* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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* (Log is kept at end of this file)
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**************************************************************************/
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#include <malloc.h>
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#include <stdio.h>
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#include <stdlib.h> /* atof(), atoi() */
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#include <string.h>
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#include "mesh.h"
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#include "common.h"
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/* return a pointer to a new mesh structure (no data array allocated yet) */
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struct mesh *(new_mesh)() {
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struct mesh *mesh_ptr;
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mesh_ptr = (struct mesh *)malloc(sizeof(struct mesh));
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if ( mesh_ptr == 0 ) {
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printf("Virtual memory exceeded\n");
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exit(-1);
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}
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mesh_ptr->cur_row = 0;
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mesh_ptr->cur_col = 0;
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return(mesh_ptr);
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}
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/* return a pointer to a dynamically allocated array */
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float *(new_mesh_data)(int nrows, int ncols) {
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float *mesh_data_ptr;
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mesh_data_ptr = (float *)malloc(nrows * ncols * sizeof(float));
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if ( mesh_data_ptr == 0 ) {
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printf("Virtual memory exceeded\n");
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exit(-1);
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}
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printf("Allocated float(%d, %d)\n", nrows, ncols);
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return(mesh_data_ptr);
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}
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/* set the option name in the mesh data structure */
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void mesh_set_option_name(struct mesh *m, char *name) {
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if ( strlen(name) < MAX_IDENT_LEN ) {
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strcpy(m->option_name, name);
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} else {
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strncpy(m->option_name, name, MAX_IDENT_LEN - 1);
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m->option_name[MAX_IDENT_LEN - 1] = '\0';
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}
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}
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/* set an option value in the mesh data structure */
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void mesh_set_option_value(struct mesh *m, char *value) {
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printf("Setting %s to %s\n", m->option_name, value);
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if ( strcmp(m->option_name, "origin_lat") == 0 ) {
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m->originx = atof(value);
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} else if ( strcmp(m->option_name, "origin_lon") == 0 ) {
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m->originy = atof(value);
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} else if ( strcmp(m->option_name, "rows") == 0 ) {
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m->rows = atoi(value);
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} else if ( strcmp(m->option_name, "cols") == 0 ) {
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m->cols = atoi(value);
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} else if ( strcmp(m->option_name, "row_step") == 0 ) {
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m->row_step = atof(value);
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} else if ( strcmp(m->option_name, "col_step") == 0 ) {
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m->col_step = atof(value);
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} else {
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printf("Unknown option %s with value %s, ignoring ...\n",
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m->option_name, value);
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}
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}
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/* $Log$
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/* Revision 1.3 1997/05/23 15:40:41 curt
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/* Added GNU copyright headers.
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/*
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* Revision 1.2 1997/05/19 18:20:50 curt
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* Slight change to origin key words.
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*
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* Revision 1.1 1997/05/16 16:07:04 curt
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* Initial revision.
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*
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*/
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