/**************************************************************************
 * mesh.c -- data structures and routines for processing terrain meshes
 *
 * Written by Curtis Olson, started May 1997.
 *
 * $Id$
 * (Log is kept at end of this file)
 **************************************************************************/


#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>  /* atof(), atoi() */
#include <string.h>

#include "mesh.h"
#include "common.h"


/* return a pointer to a new mesh structure (no data array allocated yet) */
struct mesh *(new_mesh)() {
    struct mesh *mesh_ptr;

    mesh_ptr = (struct mesh *)malloc(sizeof(struct mesh));

    if ( mesh_ptr == 0 ) {
	printf("Virtual memory exceeded\n");
	exit(-1);
    }

    mesh_ptr->cur_row = 0;
    mesh_ptr->cur_col = 0;

    return(mesh_ptr);
}


/* return a pointer to a dynamically allocated array */
float *(new_mesh_data)(int nrows, int ncols) {
    float *mesh_data_ptr;

    mesh_data_ptr = (float *)malloc(nrows * ncols * sizeof(float));

    if ( mesh_data_ptr == 0 ) {
	printf("Virtual memory exceeded\n");
	exit(-1);
    }

    printf("Allocated float(%d, %d)\n", nrows, ncols);

    return(mesh_data_ptr);
}


/* set the option name in the mesh data structure */
void mesh_set_option_name(struct mesh *m, char *name) {
    if ( strlen(name) < MAX_IDENT_LEN ) {
	strcpy(m->option_name, name);
    } else {
	strncpy(m->option_name, name, MAX_IDENT_LEN - 1);
	m->option_name[MAX_IDENT_LEN - 1] = '\0';
    }
}

/* set an option value in the mesh data structure */
void mesh_set_option_value(struct mesh *m, char *value) {
    printf("Setting %s to %s\n", m->option_name, value);

    if ( strcmp(m->option_name, "originx") == 0 ) {
	m->originx = atof(value);
    } else if ( strcmp(m->option_name, "originy") == 0 ) {
	m->originy = atof(value);
    } else if ( strcmp(m->option_name, "rows") == 0 ) {
	m->rows = atoi(value);
    } else if ( strcmp(m->option_name, "cols") == 0 ) {
	m->cols = atoi(value);
    } else if ( strcmp(m->option_name, "row_step") == 0 ) {
	m->row_step = atof(value);
    } else if ( strcmp(m->option_name, "col_step") == 0 ) {
	m->col_step = atof(value);
    } else {
	printf("Unknown option %s with value %s, ignoring ...\n", 
	       m->option_name, value);
    }
}


/* $Log$
/* Revision 1.1  1997/05/16 16:07:04  curt
/* Initial revision.
/*
 */