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(vector<Renderable *>::iterator i=owned_data.begin(); i!=owned_data.end(); ++i)
  15                 delete *i;
  16 }
  17
  18 bool Scene::setup_frustum(const Renderer &renderer) const
  19 {
  20         const Camera *camera = renderer.get_camera();
  21         if(!camera)
  22                 return false;
  23
  24         culling_matrix = renderer.get_matrix();
  25
  26         if(camera->is_orthographic())
  27         {
  28                 float h = camera->get_orthographic_height();
  29                 frustum_edges[0] = Vector4(0, 1, 0, -h);
  30                 frustum_edges[1] = Vector4(0, -1, 0, -h);
  31
  32                 float w = camera->get_orthographic_width();
  33                 frustum_edges[2] = Vector4(1, 0, 0, -w);
  34                 frustum_edges[3] = Vector4(-1, 0, 0, -w);
  35         }
  36         else
  37         {
  38                 float y = tan(camera->get_field_of_view()/2.0f);
  39                 float s = sqrt(y*y+1);
  40                 frustum_edges[0] = Vector4(0, 1/s, y/s, 0);
  41                 frustum_edges[1] = Vector4(0, -1/s, y/s, 0);
  42
  43                 float x = y*camera->get_aspect_ratio();
  44                 s = sqrt(x*x+1);
  45                 frustum_edges[2] = Vector4(1/s, 0, x/s, 0);
  46                 frustum_edges[3] = Vector4(-1/s, 0, x/s, 0);
  47         }
  48
  49         frustum_edges[4] = Vector4(0, 0, -1, -camera->get_far_clip());
  50         frustum_edges[5] = Vector4(0, 0, 1, camera->get_near_clip());
  51
  52         return true;
  53 }
  54
  55 bool Scene::frustum_cull(const Renderable &renderable) const
  56 {
  57         const Matrix *matrix = renderable.get_matrix();
  58         const Geometry::BoundingSphere<float, 3> *bsphere = renderable.get_bounding_sphere();
  59         if(!matrix || !bsphere)
  60                 return false;
  61
  62         Vector4 center = culling_matrix*(*matrix*compose(bsphere->get_center(), 1.0f));
  63         Vector3 x_axis = (matrix->column(0)*bsphere->get_radius()).slice<3>(0);
  64         float radius_sq = inner_product(x_axis, x_axis);
  65
  66         for(unsigned i=0; i<6; ++i)
  67         {
  68                 float distance = inner_product(center, frustum_edges[i]);
  69                 if(distance>0 && distance*distance>radius_sq)
  70                         return true;
  71         }
  72
  73         return false;
  74 }
  75
  76
  77 Scene::Loader::Loader(Scene &s, Collection &c):
  78         DataFile::CollectionObjectLoader<Scene>(s, &c)
  79 {
  80         add("object", &Loader::object);
  81 }
  82
  83 void Scene::Loader::object(const string &n)
  84 {
  85         RefPtr<AnimatedObject> anob = new AnimatedObject(get_collection().get<GL::Object>(n));
  86         load_sub(*anob);
  87         obj.add(*anob);
  88         obj.owned_data.push_back(anob.release());
  89 }
  90
  91 } // namespace GL
  92 } // namespace Msp