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         if(camera->is_orthographic())
  33         {
  34                 float h = camera->get_orthographic_height();
  35                 frustum_edges[0] = Vector4(0, 1, 0, -h);
  36                 frustum_edges[1] = Vector4(0, -1, 0, -h);
  37
  38                 float w = camera->get_orthographic_width();
  39                 frustum_edges[2] = Vector4(1, 0, 0, -w);
  40                 frustum_edges[3] = Vector4(-1, 0, 0, -w);
  41         }
  42         else
  43         {
  44                 float y = tan(camera->get_field_of_view()/2.0f);
  45                 float s = sqrt(y*y+1);
  46                 frustum_edges[0] = Vector4(0, 1/s, y/s, 0);
  47                 frustum_edges[1] = Vector4(0, -1/s, y/s, 0);
  48
  49                 float x = y*camera->get_aspect();
  50                 s = sqrt(x*x+1);
  51                 frustum_edges[2] = Vector4(1/s, 0, x/s, 0);
  52                 frustum_edges[3] = Vector4(-1/s, 0, x/s, 0);
  53         }
  54
  55         frustum_edges[4] = Vector4(0, 0, -1, -camera->get_far_clip());
  56         frustum_edges[5] = Vector4(0, 0, 1, camera->get_near_clip());
  57
  58         return true;
  59 }
  60
  61 bool Scene::frustum_cull(const Renderable &renderable) const
  62 {
  63         const Matrix *matrix = renderable.get_matrix();
  64         const Geometry::BoundingSphere<float, 3> *bsphere = renderable.get_bounding_sphere();
  65         if(!matrix || !bsphere)
  66                 return false;
  67
  68         Vector4 center = culling_matrix*(*matrix*compose(bsphere->get_center(), 1.0f));
  69         Vector4 x_axis = *matrix*Vector4(bsphere->get_radius(), 0.0f, 0.0f, 0.0f);
  70         float radius_sq = inner_product(x_axis, x_axis);
  71
  72         for(unsigned i=0; i<6; ++i)
  73         {
  74                 float distance = inner_product(center, frustum_edges[i]);
  75                 if(distance>0 && distance*distance>radius_sq)
  76                         return true;
  77         }
  78
  79         return false;
  80 }
  81
  82
  83 Scene::Loader::Loader(Scene &s, Collection &c):
  84         DataFile::CollectionObjectLoader<Scene>(s, &c)
  85 {
  86         add("object", &Loader::object);
  87 }
  88
  89 void Scene::Loader::object(const string &n)
  90 {
  91         RefPtr<AnimatedObject> anob = new AnimatedObject(get_collection().get<GL::Object>(n));
  92         load_sub(*anob);
  93         obj.add(*anob);
  94         obj.owned_data.push_back(anob.release());
  95 }
  96
  97 } // namespace GL
  98 } // namespace Msp