void Mesh::render(const MaterialMap &mats) const {
// index aktualni skupiny
size_t index = 0;
// pomocny seznam materialu pro predavani vertexgrupe pri renderu
MaterialMap localMats;
// iterace nad skupinami a jejich vykresleni
for (VGList::const_iterator pos = vg.begin(); pos != vg.end(); pos++, index++) {
// vyhodnoceni materialu
// pokud index v danem seznamu existuje, zapise se
MaterialMap::const_iterator matPos = mats.find(index);
if (matPos != mats.end()) {
localMats[0] = matPos->second;
} else {
localMats[0] = 0x0;
}
pos->render(localMats);
}
}
bool load_scene( Scene* scene, const char* filename )
{
TiXmlDocument doc( filename );
const TiXmlElement* root = 0;
const TiXmlElement* elem = 0;
MaterialMap materials;
MeshMap meshes;
TriVertMap triverts;
assert( scene );
// load the document
if ( !doc.LoadFile() ) {
std::cout << "ERROR, " << doc.ErrorRow() << ":" << doc.ErrorCol() << "; "
<< "parse error: " << doc.ErrorDesc() << "\n";
return false;
}
// check for root element
root = doc.RootElement();
if ( !root ) {
std::cout << "No root element.\n";
return false;
}
// reset the scene
scene->reset();
try {
// parse the camera
elem = get_unique_child( root, true, STR_CAMERA );
parse_camera( elem, &scene->camera );
// parse background color
parse_elem( root, true, STR_BACKGROUND, &scene->background_color );
// parse refractive index
parse_elem( root, true, STR_REFRACT, &scene->refractive_index );
// parse ambient light
parse_elem( root, false, STR_AMLIGHT, &scene->ambient_light );
// parse the lights
elem = root->FirstChildElement( STR_PLIGHT );
while ( elem ) {
PointLight pl;
parse_point_light( elem, &pl );
scene->add_light( pl );
elem = elem->NextSiblingElement( STR_PLIGHT );
}
// parse the materials
elem = root->FirstChildElement( STR_MATERIAL );
while ( elem ) {
Material* mat = new Material();
check_mem( mat );
scene->add_material( mat );
const char* name = parse_material( elem, mat );
assert( name );
// place each material in map by it's name, so we can associate geometries
// with them when loading geometries
// check for repeat name
if ( !materials.insert( std::make_pair( name, mat ) ).second ) {
print_error_header( elem );
std::cout << "Material '" << name << "' multiply defined.\n";
throw std::exception();
}
elem = elem->NextSiblingElement( STR_MATERIAL );
}
// parse the meshes
elem = root->FirstChildElement( STR_MESH );
while ( elem ) {
Mesh* mesh = new Mesh();
check_mem( mesh );
scene->add_mesh( mesh );
const char* name = parse_mesh( elem, mesh );
assert( name );
// place each mesh in map by it's name, so we can associate geometries
// with them when loading geometries
if ( !meshes.insert( std::make_pair( name, mesh ) ).second ) {
print_error_header( elem );
std::cout << "Mesh '" << name << "' multiply defined.\n";
throw std::exception();
}
elem = elem->NextSiblingElement( STR_MESH );
}
// parse vertices (used by triangles)
elem = root->FirstChildElement( STR_VERTEX );
while ( elem ) {
Triangle::Vertex v;
const char* name = parse_triangle_vertex( materials, elem, &v );
assert( name );
// place each vertex in map by it's name, so we can associate triangles
// with them when loading geometries
if ( !triverts.insert( std::make_pair( name, v ) ).second ) {
print_error_header( elem );
std::cout << "Triangle vertex '" << name << "' multiply defined.\n";
throw std::exception();
}
elem = elem->NextSiblingElement( STR_VERTEX );
}
// parse the geometries
// spheres
elem = root->FirstChildElement( STR_SPHERE );
while ( elem ) {
Sphere* geom = new Sphere();
check_mem( geom );
scene->add_geometry( geom );
parse_geom_sphere( materials, elem, geom );
elem = elem->NextSiblingElement( STR_SPHERE );
}
// triangles
elem = root->FirstChildElement( STR_TRIANGLE );
while ( elem ) {
Triangle* geom = new Triangle();
check_mem( geom );
scene->add_geometry( geom );
parse_geom_triangle( materials, triverts, elem, geom );
elem = elem->NextSiblingElement( STR_TRIANGLE );
}
// models
elem = root->FirstChildElement( STR_MODEL );
while ( elem ) {
Model* geom = new Model();
check_mem( geom );
scene->add_geometry( geom );
parse_geom_model( materials, meshes, elem, geom );
elem = elem->NextSiblingElement( STR_MODEL );
}
// TODO add you own geometries here
} catch ( std::bad_alloc const& ) {
std::cout << "Out of memory error while loading scene\n.";
scene->reset();
return false;
} catch ( ... ) {
scene->reset();
return false;
}
return true;
}
//------------------------------------------------------------------------
Mtl::MaterialIterator::MaterialIterator( const MaterialMap& _materialMap )
: IteratorWrapper<MaterialMap, MaterialMap::const_iterator, MaterialPtr>
( _materialMap.begin(), _materialMap.end() )
{
}