source/render/scene.cpp

   1 #include <msp/datafile/collection.h>
   2 #include "camera.h"
   3 #include "objectinstance.h"
   4 #include "orderedscene.h"
   5 #include "renderer.h"
   6 #include "scene.h"
   7 #include "simplescene.h"
   8 #include "zsortedscene.h"
   9
  10 using namespace std;
  11
  12 namespace Msp {
  13 namespace GL {
  14
  15 Scene::~Scene()
  16 {
  17         for(vector<Renderable *>::iterator i=owned_data.begin(); i!=owned_data.end(); ++i)
  18                 delete *i;
  19 }
  20
  21 bool Scene::setup_frustum(const Renderer &renderer) const
  22 {
  23         const Camera *camera = renderer.get_camera();
  24         if(!camera)
  25                 return false;
  26
  27         culling_matrix = camera->get_view_matrix()*renderer.get_matrix();
  28
  29         if(camera->is_orthographic())
  30         {
  31                 float h = camera->get_orthographic_height();
  32                 frustum_edges[0] = Vector4(0, 1, 0, -h);
  33                 frustum_edges[1] = Vector4(0, -1, 0, -h);
  34
  35                 float w = camera->get_orthographic_width();
  36                 frustum_edges[2] = Vector4(1, 0, 0, -w);
  37                 frustum_edges[3] = Vector4(-1, 0, 0, -w);
  38         }
  39         else
  40         {
  41                 float y = tan(camera->get_field_of_view()/2.0f);
  42                 float s = sqrt(y*y+1);
  43                 frustum_edges[0] = Vector4(0, 1/s, y/s, 0);
  44                 frustum_edges[1] = Vector4(0, -1/s, y/s, 0);
  45
  46                 float x = y*camera->get_aspect_ratio();
  47                 s = sqrt(x*x+1);
  48                 frustum_edges[2] = Vector4(1/s, 0, x/s, 0);
  49                 frustum_edges[3] = Vector4(-1/s, 0, x/s, 0);
  50         }
  51
  52         frustum_edges[4] = Vector4(0, 0, -1, -camera->get_far_clip());
  53         frustum_edges[5] = Vector4(0, 0, 1, camera->get_near_clip());
  54
  55         return true;
  56 }
  57
  58 bool Scene::frustum_cull(const Renderable &renderable) const
  59 {
  60         const Matrix *matrix = renderable.get_matrix();
  61         const Geometry::BoundingSphere<float, 3> *bsphere = renderable.get_bounding_sphere();
  62         if(!matrix || !bsphere)
  63                 return false;
  64
  65         Vector4 center = culling_matrix*(*matrix*compose(bsphere->get_center(), 1.0f));
  66         Vector3 x_axis = (matrix->column(0)*bsphere->get_radius()).slice<3>(0);
  67         float radius_sq = inner_product(x_axis, x_axis);
  68
  69         for(unsigned i=0; i<6; ++i)
  70         {
  71                 float distance = inner_product(center, frustum_edges[i]);
  72                 if(distance>0 && distance*distance>radius_sq)
  73                         return true;
  74         }
  75
  76         return false;
  77 }
  78
  79 Scene::SceneRegistry &Scene::get_scene_registry()
  80 {
  81         static SceneRegistry registry;
  82         static bool initialized = false;
  83         if(!initialized)
  84         {
  85                 initialized = true;
  86                 register_type<SimpleScene>("simple");
  87                 register_type<ZSortedScene>("zsorted");
  88                 register_type<OrderedScene>("ordered");
  89                 // TODO OccludedScene requires a collection as a constructor parameter
  90                 //register_type<OccludedScene>("occluded");
  91         }
  92         return registry;
  93 }
  94
  95
  96 Scene::Loader::Loader(Scene &s, Collection &c):
  97         DataFile::CollectionObjectLoader<Scene>(s, &c),
  98         content(0)
  99 {
 100         init();
 101 }
 102
 103 Scene::Loader::Loader(Scene &s, Collection &c, ContentMap &m):
 104         DataFile::CollectionObjectLoader<Scene>(s, &c),
 105         content(&m)
 106 {
 107         init();
 108 }
 109
 110 void Scene::Loader::init()
 111 {
 112         add("object", &Loader::object);
 113         add("object", &Loader::object_tagged);
 114         add("scene", &Loader::scene);
 115 }
 116
 117 void Scene::Loader::object(const string &n)
 118 {
 119         object_tagged(n, string());
 120 }
 121
 122 void Scene::Loader::object_tagged(const string &n, const string &t)
 123 {
 124         RefPtr<ObjectInstance> inst = new ObjectInstance(get_collection().get<GL::Object>(n));
 125         load_sub(*inst);
 126         obj.add(*inst);
 127         if(content && !t.empty())
 128                 (*content)[t] = inst.get();
 129         obj.owned_data.push_back(inst.release());
 130 }
 131
 132 void Scene::Loader::scene(const string &n)
 133 {
 134         obj.add(get_collection().get<Scene>(n));
 135 }
 136
 137
 138 DataFile::Loader::ActionMap Scene::GenericLoader::shared_actions;
 139
 140 Scene::GenericLoader::GenericLoader(DataFile::Collection &c):
 141         coll(c),
 142         scene(0),
 143         scene_loader(0)
 144 {
 145         set_actions(shared_actions);
 146 }
 147
 148 Scene::GenericLoader::~GenericLoader()
 149 {
 150         delete scene;
 151         delete scene_loader;
 152 }
 153
 154 void Scene::GenericLoader::init_actions()
 155 {
 156         add("type", &GenericLoader::type);
 157 }
 158
 159 void Scene::GenericLoader::type(const DataFile::Symbol &sym)
 160 {
 161         get_scene_registry().invoke(sym.name, *this);
 162 }
 163
 164 } // namespace GL
 165 } // namespace Msp