- const Camera *camera = renderer.get_camera();
- if(!camera)
- return false;
-
- culling_matrix = camera->get_view_matrix()*renderer.get_matrix();
-
- if(camera->is_orthographic())
- {
- float h = camera->get_orthographic_height();
- frustum_edges[0] = Vector4(0, 1, 0, -h);
- frustum_edges[1] = Vector4(0, -1, 0, -h);
-
- float w = camera->get_orthographic_width();
- frustum_edges[2] = Vector4(1, 0, 0, -w);
- frustum_edges[3] = Vector4(-1, 0, 0, -w);
- }
- else
- {
- float y = tan(camera->get_field_of_view()/2.0f);
- float s = sqrt(y*y+1);
- frustum_edges[0] = Vector4(0, 1/s, y/s, 0);
- frustum_edges[1] = Vector4(0, -1/s, y/s, 0);
-
- float x = y*camera->get_aspect_ratio();
- s = sqrt(x*x+1);
- frustum_edges[2] = Vector4(1/s, 0, x/s, 0);
- frustum_edges[3] = Vector4(-1/s, 0, x/s, 0);
- }
-
- frustum_edges[4] = Vector4(0, 0, -1, -camera->get_far_clip());
- frustum_edges[5] = Vector4(0, 0, 1, camera->get_near_clip());
-
- return true;
-}
-
-bool Scene::frustum_cull(const Renderable &renderable) const
-{
- const Matrix *matrix = renderable.get_matrix();
- const Geometry::BoundingSphere<float, 3> *bsphere = renderable.get_bounding_sphere();
- if(!matrix || !bsphere)
- return false;
-
- Vector4 center = culling_matrix*(*matrix*compose(bsphere->get_center(), 1.0f));
- Vector3 x_axis = (matrix->column(0)*bsphere->get_radius()).slice<3>(0);
- float radius_sq = inner_product(x_axis, x_axis);
-
- for(unsigned i=0; i<6; ++i)
- {
- float distance = inner_product(center, frustum_edges[i]);
- if(distance>0 && distance*distance>radius_sq)
- return true;
- }
-
- return false;
-}
-
-Scene::SceneRegistry &Scene::get_scene_registry()
-{
- static SceneRegistry registry;