lwObject *lw_object_read(const char *lw_file)
{
FILE *f = NULL;
lwObject *lw_object = NULL;
gint32 form_bytes = 0;
gint32 read_bytes = 0;
/* open file */
f = fopen(lw_file, "rb");
if (f == NULL) {
g_warning("can't open file %s", lw_file);
return NULL;
}
/* check for headers */
if (read_long(f) != ID_FORM) {
g_warning("file %s is not an IFF file", lw_file);
fclose(f);
return NULL;
}
form_bytes = read_long(f);
read_bytes += 4;
if (read_long(f) != ID_LWOB) {
g_warning("file %s is not a LWOB file", lw_file);
fclose(f);
return NULL;
}
/* create new lwObject */
lw_object = g_malloc0(sizeof(lwObject));
/* read chunks */
while (read_bytes < form_bytes) {
gint32 id = read_long(f);
gint32 nbytes = read_long(f);
read_bytes += 8 + nbytes + (nbytes%2);
switch (id) {
case ID_PNTS:
read_pnts(f, nbytes, lw_object);
break;
case ID_POLS:
read_pols(f, nbytes, lw_object);
break;
case ID_SRFS:
read_srfs(f, nbytes, lw_object);
break;
case ID_SURF:
read_surf(f, nbytes, lw_object);
break;
default:
fseek(f, nbytes + (nbytes%2), SEEK_CUR);
}
}
fclose(f);
return lw_object;
}
lwObject *lw_object_read(const char *lw_file)
{
/* open file */
FILE *f = fopen(lw_file, "rb");
if (f == NULL) {
return NULL;
}
/* check for headers */
if (read_long(f) != ID_FORM) {
fclose(f);
return NULL;
}
wxInt32 read_bytes = 0;
wxInt32 form_bytes = read_long(f);
read_bytes += 4;
if (read_long(f) != ID_LWOB) {
fclose(f);
return NULL;
}
/* create new lwObject */
lwObject *lw_object = (lwObject*) calloc(sizeof(lwObject),1);
/* read chunks */
while (read_bytes < form_bytes) {
wxInt32 id = read_long(f);
wxInt32 nbytes = read_long(f);
read_bytes += 8 + nbytes + (nbytes%2);
switch (id) {
case ID_PNTS:
read_pnts(f, nbytes, lw_object);
break;
case ID_POLS:
read_pols(f, nbytes, lw_object);
break;
case ID_SRFS:
read_srfs(f, nbytes, lw_object);
break;
case ID_SURF:
read_surf(f, nbytes, lw_object);
break;
default:
fseek(f, nbytes + (nbytes%2), SEEK_CUR);
}
}
fclose(f);
return lw_object;
}
lwObject *lw_object_read(const char *lw_file, std::ostream& output)
{
FILE *f = NULL;
lwObject *lw_object = NULL;
gint32 form_bytes = 0;
gint32 read_bytes = 0;
/* open file */
f = osgDB::fopen(lw_file, "rb");
if (f == NULL) {
output << "can't open file "<<lw_file<<std::endl;
return NULL;
}
/* check for headers */
if (read_long(f) != ID_FORM) {
output << "file "<<lw_file<<" is not an IFF file"<<std::endl;
fclose(f);
return NULL;
}
form_bytes = read_long(f);
read_bytes += 4;
if (read_long(f) != ID_LWOB) {
output << "file "<<lw_file<<" is not a LWOB file"<<std::endl;
fclose(f);
return NULL;
}
/* create new lwObject */
lw_object = (lwObject*) g_malloc0(sizeof(lwObject));
lw_object->init();
/* read chunks */
while (read_bytes < form_bytes) {
gint32 id = read_long(f);
gint32 nbytes = read_long(f);
read_bytes += 8 + nbytes + (nbytes%2);
switch (id) {
case ID_PNTS:
read_pnts(f, nbytes, lw_object);
break;
case ID_POLS:
read_pols(f, nbytes, lw_object);
break;
case ID_SRFS:
read_srfs(f, nbytes, lw_object);
break;
case ID_SURF:
read_surf(f, nbytes, lw_object);
break;
default:
fseek(f, nbytes + (nbytes%2), SEEK_CUR);
}
}
fclose(f);
for (int i = 0; i < lw_object->face_cnt; i++) {
int mati = lw_object->face[i].material;
if (mati == 0)
continue;
/* fetch material */
lwMaterial* mat = &lw_object->material[mati];
unsigned int flags = mat->ctex.flags;
if (flags == 0)
continue;
/* calculate texture coordinates */
lwFace* face = &lw_object->face[i];
face->texcoord = (float*) g_malloc0(face->index_cnt * sizeof(float) * 2);
for (int j = 0; j < face->index_cnt; j++) {
int vi = face->index[j];
GLfloat* vtx = &lw_object->vertex[vi*3];
GLfloat u,v;
u = v = 0.0f;
if (flags & X_AXIS) {
u = (vtx[1] - mat->ctex.cy) / mat->ctex.sy;
v = (vtx[2] - mat->ctex.cz) / mat->ctex.sz;
}
else if (flags & Y_AXIS) {
u = (vtx[0] - mat->ctex.cx) / mat->ctex.sx;
v = (vtx[2] - mat->ctex.cz) / mat->ctex.sz;
}
else if (flags & Z_AXIS) {
u = (vtx[0] - mat->ctex.cx) / mat->ctex.sx;
v = (vtx[1] - mat->ctex.cy) / mat->ctex.sy;
}
face->texcoord[j*2] = u + 0.5f;
face->texcoord[j*2+1] = v + 0.5f;
//printf("%.2f %.2f\n", u,v);
}
}
return lw_object;
}
