void quadtree_foreach_leaf(quadtree_node node, void *data, void(*f)(quadtree_node , void *))
{
if(node->childs[0] == NULL || node->childs[1] == NULL ||
node->childs[2] == NULL || node->childs[3] == NULL) {
f(node, data);
return;
}
quadtree_foreach_leaf(node->childs[0], data, f);
quadtree_foreach_leaf(node->childs[1], data, f);
quadtree_foreach_leaf(node->childs[2], data, f);
quadtree_foreach_leaf(node->childs[3], data, f);
}
heightfield
heightfield_create_from_file(camera cam, char *heightmap_filename,
float sizex, float sizey, float sizez)
{
heightfield hf;
assert(heightmap_filename);
hf = (heightfield)malloc(sizeof(struct heightfield));
object3d_init(&hf->obj, matrix4_identity, NULL, NULL);
hf->sizex = sizex;
hf->sizey = sizey;
hf->sizez = sizez;
hf->patch_sizex = 17;
hf->cam = cam;
object3d_set_world_matrix(SF_OBJECT3D(hf), matrix4_identity);
hf->zvalues = create_zvalues(hf, heightmap_filename);
if(!hf->zvalues) {
free(hf);
fprintf(stderr, "heightfield_create_from_file: Can't create mesh\n");
return NULL;
}
hf->quadtree = quadtree_create(-hf->sizex/2, -hf->sizey/2, hf->sizex/2, hf->sizey/2, 4);
quadtree_foreach_leaf(hf->quadtree, hf, quadtree_fill);
return hf;
}
void
heightfield_set_textures_from_file(heightfield hf, char *land, char *details)
{
texture tex[2];
assert(land&&details);
tex[0] = texture_create_from_file(details);
tex[1] = texture_create_from_file(land);
texture_add_texture_env(tex[0], GL_TEXTURE_ENV_MODE, GL_REPLACE);
texture_add_texture_env(tex[1], GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
texture_add_texture_env(tex[1], GL_RGB_SCALE_ARB, 2);
texture_set_min_filter_mode(tex[0], LINEAR_MIPMAP_LINEAR);
texture_set_mag_filter_mode(tex[0], LINEAR);
texture_set_min_filter_mode(tex[1], LINEAR_MIPMAP);
texture_set_mag_filter_mode(tex[1], LINEAR);
SF_OBJECT3D(hf)->mat = material_create(tex, 2, NULL, 0, 0);
quadtree_foreach_leaf(hf->quadtree, SF_OBJECT3D(hf)->mat, quadtree_set_material);
}
