X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fscene.cpp;h=6c3d2910706db98d6f2ecd7ed67b3dd771c372e8;hb=7503b8514cfcc9861c74cfebb0c60db3f72fa29b;hp=ad9dcd151110724a62581f1a7190de332b3ea86e;hpb=0a20dd14a0d1fd027a7d411b4d427bd4252342cc;p=libs%2Fgl.git

diff --git a/source/scene.cpp b/source/scene.cpp
index ad9dcd15..6c3d2910 100644
--- a/source/scene.cpp
+++ b/source/scene.cpp
@@ -29,15 +29,28 @@ bool Scene::setup_frustum(const Renderer &renderer) const
 
 	culling_matrix = renderer.get_matrix();
 
-	float y = tan(camera->get_field_of_view()/2.0f);
-	float s = sqrt(y*y+1);
-	frustum_edges[0] = Vector4(0, 1/s, y/s, 0);
-	frustum_edges[1] = Vector4(0, -1/s, y/s, 0);
-
-	float x = y*camera->get_aspect();
-	s = sqrt(x*x+1);
-	frustum_edges[2] = Vector4(1/s, 0, x/s, 0);
-	frustum_edges[3] = Vector4(-1/s, 0, x/s, 0);
+	if(camera->is_orthographic())
+	{
+		float h = camera->get_orthographic_height();
+		frustum_edges[0] = Vector4(0, 1, 0, -h);
+		frustum_edges[1] = Vector4(0, -1, 0, -h);
+
+		float w = camera->get_orthographic_width();
+		frustum_edges[2] = Vector4(1, 0, 0, -w);
+		frustum_edges[3] = Vector4(-1, 0, 0, -w);
+	}
+	else
+	{
+		float y = tan(camera->get_field_of_view()/2.0f);
+		float s = sqrt(y*y+1);
+		frustum_edges[0] = Vector4(0, 1/s, y/s, 0);
+		frustum_edges[1] = Vector4(0, -1/s, y/s, 0);
+
+		float x = y*camera->get_aspect();
+		s = sqrt(x*x+1);
+		frustum_edges[2] = Vector4(1/s, 0, x/s, 0);
+		frustum_edges[3] = Vector4(-1/s, 0, x/s, 0);
+	}
 
 	frustum_edges[4] = Vector4(0, 0, -1, -camera->get_far_clip());
 	frustum_edges[5] = Vector4(0, 0, 1, camera->get_near_clip());
@@ -53,11 +66,15 @@ bool Scene::frustum_cull(const Renderable &renderable) const
 		return false;
 
 	Vector4 center = culling_matrix*(*matrix*compose(bsphere->get_center(), 1.0f));
-	float radius = bsphere->get_radius();
+	Vector4 x_axis = *matrix*Vector4(1.0f, 0.0f, 0.0f, 0.0f);
+	float radius_sq = bsphere->get_radius()*inner_product(x_axis, x_axis);
 
 	for(unsigned i=0; i<6; ++i)
-		if(inner_product(center, frustum_edges[i])>radius)
+	{
+		float distance = inner_product(center, frustum_edges[i]);
+		if(distance*distance>radius_sq)
 			return true;
+	}
 
 	return false;
 }