source/scene.cpp

   1 #include <msp/datafile/collection.h>
   2 #include "animatedobject.h"
   3 #include "camera.h"
   4 #include "renderer.h"
   5 #include "scene.h"
   6
   7 using namespace std;
   8
   9 namespace Msp {
  10 namespace GL {
  11
  12 Scene::~Scene()
  13 {
  14         for(list<Renderable *>::iterator i=owned_data.begin(); i!=owned_data.end(); ++i)
  15                 delete *i;
  16 }
  17
  18 void Scene::render(const Tag &tag) const
  19 {
  20         Renderer renderer(0);
  21         render(renderer, tag);
  22 }
  23
  24 bool Scene::setup_frustum(const Renderer &renderer) const
  25 {
  26         const Camera *camera = renderer.get_camera();
  27         if(!camera)
  28                 return false;
  29
  30         culling_matrix = renderer.get_matrix();
  31
  32         float y = tan(camera->get_field_of_view()/2.0f);
  33         float s = sqrt(y*y+1);
  34         frustum_edges[0] = Vector4(0, 1/s, y/s, 0);
  35         frustum_edges[1] = Vector4(0, -1/s, y/s, 0);
  36
  37         float x = y*camera->get_aspect();
  38         s = sqrt(x*x+1);
  39         frustum_edges[2] = Vector4(1/s, 0, x/s, 0);
  40         frustum_edges[3] = Vector4(-1/s, 0, x/s, 0);
  41
  42         frustum_edges[4] = Vector4(0, 0, -1, -camera->get_far_clip());
  43         frustum_edges[5] = Vector4(0, 0, 1, camera->get_near_clip());
  44
  45         return true;
  46 }
  47
  48 bool Scene::frustum_cull(const Renderable &renderable) const
  49 {
  50         const Matrix *matrix = renderable.get_matrix();
  51         const Geometry::BoundingSphere<float, 3> *bsphere = renderable.get_bounding_sphere();
  52         if(!matrix || !bsphere)
  53                 return false;
  54
  55         Vector4 center = culling_matrix*(*matrix*compose(bsphere->get_center(), 1.0f));
  56         float radius = bsphere->get_radius();
  57
  58         for(unsigned i=0; i<6; ++i)
  59                 if(inner_product(center, frustum_edges[i])>radius)
  60                         return true;
  61
  62         return false;
  63 }
  64
  65
  66 Scene::Loader::Loader(Scene &s, Collection &c):
  67         DataFile::CollectionObjectLoader<Scene>(s, &c)
  68 {
  69         add("object", &Loader::object);
  70 }
  71
  72 void Scene::Loader::object(const string &n)
  73 {
  74         RefPtr<AnimatedObject> anob = new AnimatedObject(get_collection().get<GL::Object>(n));
  75         load_sub(*anob);
  76         obj.add(*anob);
  77         obj.owned_data.push_back(anob.release());
  78 }
  79
  80 } // namespace GL
  81 } // namespace Msp