root/OpenSceneGraph/trunk/include/osgAnimation/RigTransformHardware @ 13041

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1/*  -*-c++-*-
2 *  Copyright (C) 2009 Cedric Pinson <cedric.pinson@plopbyte.net>
3 *
4 * This library is open source and may be redistributed and/or modified under
5 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
6 * (at your option) any later version.  The full license is in LICENSE file
7 * included with this distribution, and on the openscenegraph.org website.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * OpenSceneGraph Public License for more details.
13 */
14
15#ifndef OSGANIMATION_RIG_TRANSFORM_HARDWARE
16#define OSGANIMATION_RIG_TRANSFORM_HARDWARE 1
17
18#include <osgAnimation/Export>
19#include <osgAnimation/RigTransform>
20#include <osgAnimation/VertexInfluence>
21#include <osgAnimation/Bone>
22#include <osg/Matrix>
23#include <osg/Array>
24
25namespace osgAnimation
26{
27    class RigGeometry;
28
29    /// This class manage format for hardware skinning
30    class OSGANIMATION_EXPORT RigTransformHardware : public RigTransform
31    {
32    public:
33        typedef osg::Matrix MatrixType;
34        typedef osgAnimation::Bone BoneType;
35        typedef std::vector<osg::ref_ptr<osg::Vec4Array> > BoneWeightAttribList;
36        typedef std::vector<osg::ref_ptr<BoneType> > BonePalette;
37
38        typedef std::vector<osg::Matrix> MatrixPalette;
39        struct IndexWeightEntry
40        {
41            int _boneIndex;
42            float _boneWeight;
43            IndexWeightEntry() { _boneIndex = 0; _boneWeight = 0;}
44            IndexWeightEntry(int index, float weight) { _boneIndex = index; _boneWeight = weight;}
45            int getIndex() const { return _boneIndex; }
46            float getWeight() const { return _boneWeight; }
47        };
48        typedef std::vector<std::vector<IndexWeightEntry> > VertexIndexWeightList;
49
50        RigTransformHardware();
51
52        osg::Vec4Array* getVertexAttrib(int index);
53        int getNumVertexAttrib();
54
55        osg::Uniform* getMatrixPaletteUniform();
56        void computeMatrixPaletteUniform(const osg::Matrix& transformFromSkeletonToGeometry, const osg::Matrix& invTransformFromSkeletonToGeometry);
57
58        int getNumBonesPerVertex() const;
59        int getNumVertexes() const;
60
61        bool createPalette(int nbVertexes, BoneMap boneMap, const VertexInfluenceSet::VertexIndexToBoneWeightMap& vertexIndexToBoneWeightMap);
62
63        virtual void operator()(RigGeometry&);
64        void setShader(osg::Shader*);
65
66    protected:
67
68        bool init(RigGeometry&);
69
70        BoneWeightAttribList createVertexAttribList();
71        osg::Uniform* createVertexUniform();
72
73        int _bonesPerVertex;
74        int _nbVertexes;
75        VertexIndexWeightList _vertexIndexMatrixWeightList;
76        BonePalette _bonePalette;
77        BoneWeightAttribList _boneWeightAttribArrays;
78        osg::ref_ptr<osg::Uniform> _uniformMatrixPalette;
79        osg::ref_ptr<osg::Shader> _shader;
80
81        bool _needInit;
82    };
83}
84
85#endif
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