root/OpenSceneGraph/trunk/include/osg/CollectOccludersVisitor @ 13041

Revision 13041, 4.3 kB (checked in by robert, 2 years ago)

Ran script to remove trailing spaces and tabs

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
Line 
1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSG_COLLECTOCCLUDERSVISITOR
15#define OSG_COLLECTOCCLUDERSVISITOR 1
16
17#include <osg/NodeVisitor>
18#include <osg/CullStack>
19
20#include <set>
21
22namespace osg {
23
24class OSG_EXPORT CollectOccludersVisitor : public osg::NodeVisitor, public osg::CullStack
25{
26    public:
27
28
29        typedef std::set<ShadowVolumeOccluder> ShadowVolumeOccluderSet;
30
31        CollectOccludersVisitor();
32        virtual ~CollectOccludersVisitor();
33
34        META_NodeVisitor("osg","CollectOccludersVisitor")
35
36        virtual CollectOccludersVisitor* cloneType() const { return new CollectOccludersVisitor(); }
37
38        virtual void reset();
39
40        virtual float getDistanceToEyePoint(const Vec3& pos, bool withLODScale) const;
41        virtual float getDistanceToViewPoint(const Vec3& pos, bool withLODScale) const;
42
43        virtual float getDistanceFromEyePoint(const Vec3& pos, bool withLODScale) const;
44
45        virtual void apply(osg::Node&);
46        virtual void apply(osg::Transform& node);
47        virtual void apply(osg::Projection& node);
48
49        virtual void apply(osg::Switch& node);
50        virtual void apply(osg::LOD& node);
51        virtual void apply(osg::OccluderNode& node);
52
53        /** Sets the minimum shadow occluder volume that an active occluder
54          * must have. vol is units relative the clip space volume where 1.0
55          * is the whole clip space. */
56        void setMinimumShadowOccluderVolume(float vol) { _minimumShadowOccluderVolume = vol; }
57        float getMinimumShadowOccluderVolume() const { return _minimumShadowOccluderVolume; }
58
59        /** Sets the maximum number of occluders to have active for culling
60          * purposes. */
61        void setMaximumNumberOfActiveOccluders(unsigned int num) { _maximumNumberOfActiveOccluders = num; }
62        unsigned int getMaximumNumberOfActiveOccluders() const { return _maximumNumberOfActiveOccluders; }
63
64        void setCreateDrawablesOnOccludeNodes(bool flag) { _createDrawables=flag; }
65        bool getCreateDrawablesOnOccludeNodes() const { return _createDrawables; }
66
67        void setCollectedOccluderSet(const ShadowVolumeOccluderSet& svol) { _occluderSet = svol; }
68        ShadowVolumeOccluderSet& getCollectedOccluderSet() { return _occluderSet; }
69        const ShadowVolumeOccluderSet& getCollectedOccluderSet() const { return _occluderSet; }
70
71        /** Removes occluded occluders for the collected occluders list, then
72          * discards all but MaximumNumberOfActiveOccluders of occluders,
73          * discarding the occluders with the lowest shadow occluder volume. */
74        void removeOccludedOccluders();
75
76
77    protected:
78
79        /** Prevents unwanted copy construction. */
80        //CollectOccludersVisitor(const CollectOccludersVisitor&):osg::NodeVisitor(),osg::CullStack() {}
81
82        /** Prevents unwanted copy operator. */
83        CollectOccludersVisitor& operator = (const CollectOccludersVisitor&) { return *this; }
84
85        inline void handle_cull_callbacks_and_traverse(osg::Node& node)
86        {
87            /*osg::NodeCallback* callback = node.getCullCallback();
88            if (callback) (*callback)(&node,this);
89            else*/ if (node.getNumChildrenWithOccluderNodes()>0) traverse(node);
90        }
91
92        inline void handle_cull_callbacks_and_accept(osg::Node& node,osg::Node* acceptNode)
93        {
94            /*osg::NodeCallback* callback = node.getCullCallback();
95            if (callback) (*callback)(&node,this);
96            else*/ if (node.getNumChildrenWithOccluderNodes()>0) acceptNode->accept(*this);
97        }
98
99        float                       _minimumShadowOccluderVolume;
100        unsigned                    _maximumNumberOfActiveOccluders;
101        bool                        _createDrawables;
102        ShadowVolumeOccluderSet     _occluderSet;
103
104};
105
106}
107
108#endif
109
Note: See TracBrowser for help on using the browser.