/*
read_gmsh: read the gmsh II file and output a pointer to mesh structure
ckecked: ok
*/
mesh *read_gmsh(const char *fname)
{
id i; // index cell
id j; // index for face in all faces
id k; // index for faces in one cell
gmsh_raw *gmsh;
mesh *m;
// open mesh file and allocate gmsh strucut
fp = sfopen(fname, "in read_gmsh() for fp");
gmsh = smalloc(sizeof(gmsh_raw)*1, "in read_gmsh, for gmsh");
/*find the opening mark, and read the text blocks*/
while(fgets(line, MAXLINE, fp) != NULL){ // read line by line
if (sscanf(line, "%s", w) == 1){
if (strcmp(w, "$PhysicalNames") == 0) read_physicalNames(fp, gmsh);
if (strcmp(w, "$Nodes") == 0) read_nodes(fp, gmsh);
if (strcmp(w, "$Elements") == 0) read_elems(fp, gmsh);
}
}
/* construct mesh from elements*/
m = elems_to_mesh(gmsh);
/* sort the faces according to its 3 types: boundary, salve, nb*/
sort_faces();
/*clean up*/
fclose(fp);
free(facetypes);
return m;
}
void
render_objects(r_context_t *c)
{
int i;
c->r_leafcount = 0;
#if 0
/* Useful for exploring face culling effectiveness */
if (g->r_lockpvs)
{
render_backend(&facelist);
return;
}
#endif
c->cos_fov = cos(g->r_eyefov/2.0f * DEG2RAD);
/* Get clip coordinate transformation matrix */
gen_clipmat(c);
c->facelist.numfaces = c->translist.numfaces = 0;
c->numsky = 0;
/* Clear "included" faces list */
memset(c->r_faceinc, 0, g->r_numfaces * sizeof(int));
/* "Walk" the BSP tree to generate a list of faces to render */
/* FIXME: include other models */
render_walk_model(c, 0);
/* Sort the face list */
sort_faces(c);
/* FIXME: Reset depth buffer range based on max/min Z in facelist */
/* Draw sky first -- on first pipe if geometry decomposed */
if (c->numsky && g->r_sky && c->range[0] == 0.0)
render_backend_sky(c);
/* Draw normal faces */
render_backend(c, &(c->facelist));
/* Draw visible mapents (md3 models) -- on last pipe if geometry decomposed */
if (g->r_drawitems && c->range[1] == 1.0)
{
for(i=0; i < g->g_mapent_numinst; i++)
{
if (c->r_eyecluster < 0 ||
BSP_TESTVIS(c->r_eyecluster, g->g_mapent_inst[i].cluster))
render_backend_mapent(c, i);
}
}
/* Draw transparent faces last */
if (c->translist.numfaces)
render_backend(c, &(c->translist));
}
