X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Foccludedscene.cpp;h=b3219123e8a2ed777d1a3a75d3691864e943712b;hp=8a3b74262430fcc134884b04c8d17c17bd8fd5a3;hb=HEAD;hpb=d31b672d002c685d15f01a59c17c99a8d164d13e

diff --git a/source/occludedscene.cpp b/source/occludedscene.cpp
deleted file mode 100644
index 8a3b7426..00000000
--- a/source/occludedscene.cpp
+++ /dev/null
@@ -1,191 +0,0 @@
-#include <algorithm>
-#include <msp/gl/extensions/arb_occlusion_query.h>
-#include <msp/gl/extensions/arb_occlusion_query2.h>
-#include "camera.h"
-#include "occludedscene.h"
-#include "programbuilder.h"
-#include "renderer.h"
-#include "sphere.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-OccludedScene::OccludedScene():
-	bounding_mesh((VERTEX3, NORMAL3)),
-	bounding_shader("occluder.glsl"),
-	occluder_min_size(0.25f),
-	cache_dirty(false)
-{
-	static Require req(ARB_occlusion_query);
-	static Require req2(ARB_occlusion_query2);
-
-	/* Use a slightly larger radius to ensure that all parts of the renderable
-	fit inside the icosahedron */
-	IcoSphereBuilder(1.26f, 1).build(bounding_mesh);
-	bounding_mesh.set_winding(&WindingTest::counterclockwise());
-}
-
-OccludedScene::~OccludedScene()
-{
-	vector<unsigned> queries;
-	queries.reserve(occluded_cache.size());
-	for(OccludedArray::iterator i=occluded_cache.begin(); i!=occluded_cache.end(); ++i)
-		queries.push_back(i->query);
-	glDeleteQueries(queries.size(), &queries[0]);
-}
-
-void OccludedScene::add(Renderable &r)
-{
-	renderables.insert(&r);
-	cache_dirty = true;
-}
-
-void OccludedScene::remove(Renderable &r)
-{
-	renderables.erase(&r);
-	cache_dirty = true;
-}
-
-void OccludedScene::populate_cache() const
-{
-	if(!cache_dirty)
-		return;
-
-	if(occluded_cache.size()<renderables.size())
-	{
-		unsigned old_size = occluded_cache.size();
-		occluded_cache.resize(renderables.size());
-		vector<unsigned> new_queries(occluded_cache.size()-old_size);
-		glGenQueries(new_queries.size(), &new_queries[0]);
-		for(unsigned i=0; i<new_queries.size(); ++i)
-			occluded_cache[old_size+i].query = new_queries[i];
-	}
-
-	OccludedArray::iterator j = occluded_cache.begin();
-	for(RenderableSet::iterator i=renderables.begin(); i!=renderables.end(); ++i, ++j)
-		j->renderable = *i;
-	for(; j!=occluded_cache.end(); ++j)
-	{
-		j->renderable = 0;
-		j->in_frustum = false;
-	}
-
-	cache_dirty = false;
-}
-
-void OccludedScene::setup_frame(Renderer &renderer)
-{
-	populate_cache();
-	for(OccludedArray::const_iterator i=occluded_cache.begin(); i!=occluded_cache.end(); ++i)
-		i->renderable->setup_frame(renderer);
-}
-
-void OccludedScene::finish_frame()
-{
-	for(OccludedArray::const_iterator i=occluded_cache.begin(); i!=occluded_cache.end(); ++i)
-		i->renderable->finish_frame();
-}
-
-void OccludedScene::render(Renderer &renderer, const Tag &tag) const
-{
-	if(renderables.empty())
-		return;
-
-	populate_cache();
-
-	const Camera *camera = renderer.get_camera();
-	if(!camera)
-	{
-		for(OccludedArray::const_iterator i=occluded_cache.begin(); i!=occluded_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 near_clip = camera->get_near_clip();
-	float frustum_h = tan(camera->get_field_of_view()/2.0f)*2.0f;
-
-	// Perform frustum culling and render any major occluders
-	bool use_frustum = setup_frustum(renderer);
-	for(OccludedArray::iterator i=occluded_cache.begin(); (i!=occluded_cache.end() && i->renderable); ++i)
-	{
-		i->in_frustum = (!use_frustum || !frustum_cull(*i->renderable));
-		if(!i->in_frustum)
-			continue;
-
-		const Matrix *matrix = i->renderable->get_matrix();
-		i->bounding_sphere = i->renderable->get_bounding_sphere();
-		if(matrix && i->bounding_sphere)
-		{
-			float depth = dot(*matrix*i->bounding_sphere->get_center()-camera_pos, look_dir);
-			float size = i->bounding_sphere->get_radius()*2/max(depth, near_clip);
-			i->occluder = (size>frustum_h*occluder_min_size);
-		}
-		else
-			// If the size can't be calculated, treat it as occluder
-			i->occluder = true;
-
-		if(i->occluder)
-			renderer.render(*i->renderable, tag);
-	}
-
-	// Move all objects within the frustum to the beginning of the array
-	for(OccludedArray::iterator i=occluded_cache.begin(), j=i+renderables.size()-1; i!=j; )
-	{
-		if(i->in_frustum)
-			++i;
-		else if(j->in_frustum)
-			swap(*i, *j);
-		else
-			--j;
-	}
-
-	{
-		Renderer::Push push(renderer);
-		renderer.set_shader_program(&bounding_shader);
-
-		glColorMask(false, false, false, false);
-		glDepthMask(false);
-
-		// Fire off the occlusion queries
-		for(OccludedArray::const_iterator i=occluded_cache.begin(); (i!=occluded_cache.end() && i->in_frustum); ++i)
-			if(!i->occluder)
-			{
-				glBeginQuery(GL_ANY_SAMPLES_PASSED, i->query);
-				Renderer::Push push2(renderer);
-				renderer.transform(Matrix(*i->renderable->get_matrix())
-					.translate(i->bounding_sphere->get_center())
-					.scale(i->bounding_sphere->get_radius()));
-				bounding_mesh.draw(renderer);
-				glEndQuery(GL_ANY_SAMPLES_PASSED);
-			}
-
-		glColorMask(true, true, true, true);
-		glDepthMask(true);
-	}
-
-	// Render anything that has a chance of being visible
-	for(OccludedArray::const_iterator i=occluded_cache.begin(); (i!=occluded_cache.end() && i->in_frustum); ++i)
-		if(!i->occluder)
-		{
-			unsigned any_passed = 0;
-			glGetQueryObjectuiv(i->query, GL_QUERY_RESULT, &any_passed);
-			if(any_passed)
-				renderer.render(*i->renderable, tag);
-		}
-}
-
-
-OccludedScene::OccludedRenderable::OccludedRenderable():
-	renderable(0),
-	bounding_sphere(0),
-	in_frustum(false),
-	occluder(false),
-	query(0)
-{ }
-
-} // namespace GL
-} // namespace Msp