152 lines
4.8 KiB
C++
152 lines
4.8 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file pipeOcclusionCullTraverser.h
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* @author drose
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* @date 2007-05-29
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*/
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#ifndef PIPEOCCLUSIONCULLTRAVERSER_H
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#define PIPEOCCLUSIONCULLTRAVERSER_H
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#include "pandabase.h"
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#include "cullTraverser.h"
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#include "graphicsOutput.h"
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#include "displayRegion.h"
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#include "cullHandler.h"
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#include "texture.h"
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class GraphicsEngine;
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class GraphicsPipe;
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class GraphicsStateGuardian;
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/**
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* This specialization of CullTraverser uses the graphics pipe itself to
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* perform occlusion culling. As such, it's likely to be inefficient (since
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* it interferes with the pipe's normal mode of rendering), and is mainly
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* useful to test other, CPU-based occlusion algorithms.
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*
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* This cannot be used in a multithreaded pipeline environment where cull and
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* draw are operating simultaneously.
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*
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* It can't be defined in the cull subdirectory, because it needs access to
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* GraphicsPipe and DisplayRegion and other classes in display. So we put it
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* in grutil instead, for lack of any better ideas.
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*/
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class EXPCL_PANDA_GRUTIL PipeOcclusionCullTraverser : public CullTraverser,
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public CullHandler {
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PUBLISHED:
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explicit PipeOcclusionCullTraverser(GraphicsOutput *host);
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PipeOcclusionCullTraverser(const PipeOcclusionCullTraverser ©) = delete;
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virtual void set_scene(SceneSetup *scene_setup,
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GraphicsStateGuardianBase *gsg,
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bool dr_incomplete_render);
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virtual void end_traverse();
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INLINE GraphicsOutput *get_buffer() const;
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Texture *get_texture();
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INLINE void set_occlusion_mask(const DrawMask &occlusion_mask);
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INLINE const DrawMask &get_occlusion_mask() const;
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protected:
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virtual bool is_in_view(CullTraverserData &data);
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virtual void traverse_below(CullTraverserData &data);
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virtual void record_object(CullableObject *object,
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const CullTraverser *traverser);
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private:
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void make_sphere();
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static LVertex compute_sphere_point(PN_stdfloat latitude, PN_stdfloat longitude);
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void make_box();
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void make_solid_test_state();
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bool get_volume_viz(const BoundingVolume *vol,
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CPT(Geom) &geom, // OUT
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CPT(TransformState) &net_transform, // IN-OUT
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CPT(TransformState) &internal_transform // OUT
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);
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PT(OcclusionQueryContext)
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perform_occlusion_test(const Geom *geom,
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const TransformState *net_transform,
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const TransformState *internal_transform);
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void show_results(int num_fragments, const Geom *geom,
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const TransformState *net_transform,
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const TransformState *internal_transform);
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private:
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bool _live;
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PT(GraphicsOutput) _buffer;
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PT(Texture) _texture;
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PT(DisplayRegion) _display_region;
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DrawMask _occlusion_mask;
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PT(SceneSetup) _scene;
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PT(CullTraverser) _internal_trav;
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CPT(TransformState) _inv_cs_world_transform;
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CullHandler *_internal_cull_handler;
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CullHandler *_true_cull_handler;
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// This is the query that has already been performed on the current node or
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// a parent.
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PT(OcclusionQueryContext) _current_query;
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// This is the query that has been performed for any children.
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PT(OcclusionQueryContext) _next_query;
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PT(Geom) _sphere_geom;
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PT(Geom) _box_geom;
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CPT(RenderState) _solid_test_state;
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class PendingObject {
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public:
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INLINE PendingObject(CullableObject *object);
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INLINE ~PendingObject();
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CullableObject *_object;
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PT(OcclusionQueryContext) _query;
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};
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typedef pvector<PendingObject> PendingObjects;
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PendingObjects _pending_objects;
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static PStatCollector _setup_occlusion_pcollector;
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static PStatCollector _draw_occlusion_pcollector;
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static PStatCollector _test_occlusion_pcollector;
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static PStatCollector _finish_occlusion_pcollector;
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static PStatCollector _occlusion_untested_pcollector;
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static PStatCollector _occlusion_passed_pcollector;
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static PStatCollector _occlusion_failed_pcollector;
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static PStatCollector _occlusion_tests_pcollector;
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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CullTraverser::init_type();
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register_type(_type_handle, "PipeOcclusionCullTraverser",
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CullTraverser::get_class_type());
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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};
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#include "pipeOcclusionCullTraverser.I"
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#endif
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