1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/mesh.c	Fri Jan 13 09:34:16 2012 +0200
     1.3 @@ -0,0 +1,125 @@
     1.4 +#include <stdio.h>
     1.5 +#include <stdlib.h>
     1.6 +#include <string.h>
     1.7 +#include <errno.h>
     1.8 +#include "mesh.h"
     1.9 +
    1.10 +int mattr_init(struct mesh_attrib *ma)
    1.11 +{
    1.12 +	memset(ma, 0, sizeof *ma);
    1.13 +	return 0;
    1.14 +}
    1.15 +
    1.16 +void mattr_destroy(struct mesh_attrib *ma)
    1.17 +{
    1.18 +	if(ma) {
    1.19 +		free(ma->name);
    1.20 +		free(ma->data);
    1.21 +	}
    1.22 +}
    1.23 +
    1.24 +int mattr_set_name(struct mesh_attrib *ma, const char *name)
    1.25 +{
    1.26 +	char *tmp;
    1.27 +
    1.28 +	if(!(tmp = malloc(strlen(name) + 1))) {
    1.29 +		return -1;
    1.30 +	}
    1.31 +	strcpy(tmp, name);
    1.32 +
    1.33 +	free(ma->name);
    1.34 +	ma->name = tmp;
    1.35 +	return 0;
    1.36 +}
    1.37 +
    1.38 +#define INITSZ	(16 * ma->elem_size)
    1.39 +int mattr_add_elem(struct mesh_attrib *ma, void *data)
    1.40 +{
    1.41 +	int nsz = (ma->count + 1) * ma->elem_size;
    1.42 +
    1.43 +	if(nsz > ma->datasz) {
    1.44 +		void *tmp;
    1.45 +
    1.46 +		nsz = ma->datasz ? ma->datasz * 2 : INITSZ;
    1.47 +
    1.48 +		if(!(tmp = realloc(ma->data, nsz))) {
    1.49 +			return -1;
    1.50 +		}
    1.51 +		ma->data = tmp;
    1.52 +		ma->datasz = nsz;
    1.53 +	}
    1.54 +
    1.55 +	memcpy((char*)ma->data + ma->elem_size * ma->count++, data, ma->elem_size);
    1.56 +	return 0;
    1.57 +}
    1.58 +
    1.59 +/* -------- mesh -------- */
    1.60 +
    1.61 +int mesh_init(struct mesh *m)
    1.62 +{
    1.63 +	memset(m, 0, sizeof *m);
    1.64 +	return 0;
    1.65 +}
    1.66 +
    1.67 +void mesh_destroy(struct mesh *m)
    1.68 +{
    1.69 +	int i;
    1.70 +
    1.71 +	free(m->name);
    1.72 +
    1.73 +	for(i=0; i<m->num_attr; i++) {
    1.74 +		mattr_destroy(&m->attr[i]);
    1.75 +	}
    1.76 +	free(m->attr);
    1.77 +
    1.78 +	for(i=0; i<m->num_attr; i++) {
    1.79 +		free(m->polyidx[i]);
    1.80 +	}
    1.81 +	free(m->polyidx);
    1.82 +}
    1.83 +
    1.84 +int mesh_set_name(struct mesh *m, const char *name)
    1.85 +{
    1.86 +	char *tmp;
    1.87 +
    1.88 +	if(!(tmp = malloc(strlen(name) + 1))) {
    1.89 +		return -1;
    1.90 +	}
    1.91 +	strcpy(tmp, name);
    1.92 +
    1.93 +	free(m->name);
    1.94 +	m->name = tmp;
    1.95 +	return 0;
    1.96 +}
    1.97 +
    1.98 +int mesh_add_attrib(struct mesh *m, struct mesh_attrib *attr)
    1.99 +{
   1.100 +	void *tmp;
   1.101 +	int idx = m->num_attr++;
   1.102 +
   1.103 +	if(!(tmp = realloc(m->attr, m->num_attr * sizeof *attr))) {
   1.104 +		return -1;
   1.105 +	}
   1.106 +	m->attr = tmp;
   1.107 +	m->attr[idx] = *attr;
   1.108 +
   1.109 +	if(!(tmp = realloc(m->polyidx, m->num_attr * sizeof *m->polyidx))) {
   1.110 +		m->num_attr--;
   1.111 +		return -1;
   1.112 +	}
   1.113 +	m->polyidx[idx] = 0;
   1.114 +
   1.115 +	return 0;
   1.116 +}
   1.117 +
   1.118 +int mesh_find_attrib(struct mesh *m, const char *name)
   1.119 +{
   1.120 +	int i;
   1.121 +
   1.122 +	for(i=0; i<m->num_attr; i++) {
   1.123 +		if(strcmp(m->attr[i].name, name) == 0) {
   1.124 +			return i;
   1.125 +		}
   1.126 +	}
   1.127 +	return -1;
   1.128 +}