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         const Matrix &matrix = camera->get_object_matrix();
  31
  32         float y = tan(camera->get_field_of_view()/2.0f);
  33         float s = sqrt(y*y+1);
  34         frustum_edges[0] = matrix*Vector4(0, 1/s, y/s, 0);
  35         frustum_edges[1] = matrix*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] = matrix*Vector4(1/s, 0, x/s, 0);
  40         frustum_edges[3] = matrix*Vector4(-1/s, 0, x/s, 0);
  41
  42         const Vector3 &camera_pos = camera->get_position();
  43         Vector4 pos4 = compose(camera_pos, 0.0f);
  44         for(unsigned i=0; i<4; ++i)
  45                 frustum_edges[i].w = -inner_product(frustum_edges[i], pos4);
  46
  47         const Vector3 &look_dir = camera->get_look_direction();
  48         frustum_edges[4] = compose(look_dir, -dot(camera_pos, look_dir)-camera->get_far_clip());
  49         frustum_edges[5] = compose(-look_dir, dot(camera_pos, look_dir)+camera->get_near_clip());
  50
  51         return true;
  52 }
  53
  54 bool Scene::frustum_cull(const Renderable &renderable) const
  55 {
  56         const Matrix *matrix = renderable.get_matrix();
  57         const Geometry::BoundingSphere<float, 3> *bsphere = renderable.get_bounding_sphere();
  58         if(!matrix || !bsphere)
  59                 return false;
  60
  61         Vector4 center = *matrix*compose(bsphere->get_center(), 1.0f);
  62         float radius = bsphere->get_radius();
  63
  64         for(unsigned i=0; i<6; ++i)
  65                 if(inner_product(center, frustum_edges[i])>radius)
  66                         return true;
  67
  68         return false;
  69 }
  70
  71
  72 Scene::Loader::Loader(Scene &s, Collection &c):
  73         DataFile::CollectionObjectLoader<Scene>(s, &c)
  74 {
  75         add("object", &Loader::object);
  76 }
  77
  78 void Scene::Loader::object(const string &n)
  79 {
  80         RefPtr<AnimatedObject> anob = new AnimatedObject(get_collection().get<GL::Object>(n));
  81         load_sub(*anob);
  82         obj.add(*anob);
  83         obj.owned_data.push_back(anob.release());
  84 }
  85
  86 } // namespace GL
  87 } // namespace Msp