X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frender%2Fzsortedscene.cpp;fp=source%2Frender%2Fzsortedscene.cpp;h=46b14dbb6a672dbfd044b1ffa7463695e9212244;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/render/zsortedscene.cpp b/source/render/zsortedscene.cpp
new file mode 100644
index 00000000..46b14dbb
--- /dev/null
+++ b/source/render/zsortedscene.cpp
@@ -0,0 +1,132 @@
+#include "camera.h"
+#include "renderer.h"
+#include "zsortedscene.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+ZSortedScene::ZSortedScene():
+	order(BACK_TO_FRONT),
+	reference(FURTHEST)
+{ }
+
+void ZSortedScene::add(Renderable &r)
+{
+	if(renderables.insert(&r).second && !sorted_cache.empty())
+		sorted_cache.push_back(&r);
+}
+
+void ZSortedScene::remove(Renderable &r)
+{
+	renderables.erase(&r);
+	sorted_cache.clear();
+}
+
+void ZSortedScene::set_order(SortOrder o)
+{
+	order = o;
+}
+
+void ZSortedScene::set_reference(DepthReference r)
+{
+	reference = r;
+}
+
+void ZSortedScene::populate_cache() const
+{
+	if(sorted_cache.empty() && !renderables.empty())
+	{
+		sorted_cache.reserve(renderables.size());
+		sorted_cache.insert(sorted_cache.end(), renderables.begin(), renderables.end());
+	}
+}
+
+void ZSortedScene::setup_frame(Renderer &renderer)
+{
+	populate_cache();
+	for(SortedArray::const_iterator i=sorted_cache.begin(); i!=sorted_cache.end(); ++i)
+		i->renderable->setup_frame(renderer);
+}
+
+void ZSortedScene::finish_frame()
+{
+	for(SortedArray::const_iterator i=sorted_cache.begin(); i!=sorted_cache.end(); ++i)
+		i->renderable->finish_frame();
+}
+
+void ZSortedScene::render(Renderer &renderer, const Tag &tag) const
+{
+	if(renderables.empty())
+		return;
+
+	populate_cache();
+
+	const Camera *camera = renderer.get_camera();
+	if(!camera)
+	{
+		for(SortedArray::const_iterator i=sorted_cache.begin(); i!=sorted_cache.end(); ++i)
+			renderer.render(*i->renderable, tag);
+		return;
+	}
+
+	const Vector3 &camera_pos = camera->get_position();
+	const Vector3 &look_dir = camera->get_look_direction();
+	float radius_factor = reference-1.0f;
+	float sign = 1.0f-order*2.0f;
+
+	bool use_frustum = setup_frustum(renderer);
+	for(SortedArray::iterator i=sorted_cache.begin(); i!=sorted_cache.end(); ++i)
+	{
+		i->in_frustum = (!use_frustum || !frustum_cull(*i->renderable));
+		if(!i->in_frustum)
+			continue;
+
+		if(const Matrix *matrix = i->renderable->get_matrix())
+		{
+			if(const Geometry::BoundingSphere<float, 3> *bsphere = i->renderable->get_bounding_sphere())
+				i->depth = dot(*matrix*bsphere->get_center()-camera_pos, look_dir)+bsphere->get_radius()*radius_factor;
+			else
+				i->depth = dot(*matrix*Vector3()-camera_pos, look_dir);
+			i->depth *= sign;
+		}
+		else
+			i->depth = 0;
+	}
+
+	for(SortedArray::iterator i=sorted_cache.begin(), j=i; i!=sorted_cache.end(); ++i)
+		if(i->in_frustum)
+		{
+			if(i!=j)
+				swap(*i, *j);
+
+			if(j!=sorted_cache.begin() && *j<*(j-1))
+			{
+				SortedRenderable sr = *j;
+				SortedArray::iterator k = j-1;
+				*j = *k;
+				while(k!=sorted_cache.begin() && sr<*(k-1))
+				{
+					*k = *(k-1);
+					--k;
+				}
+				*k = sr;
+			}
+
+			++j;
+		}
+
+	for(SortedArray::const_iterator i=sorted_cache.begin(); (i!=sorted_cache.end() && i->in_frustum); ++i)
+		renderer.render(*i->renderable, tag);
+}
+
+
+ZSortedScene::SortedRenderable::SortedRenderable(Renderable *r):
+	renderable(r),
+	in_frustum(false),
+	depth(0.0f)
+{ }
+
+} // namespace GL
+} // namespace Msp