78 lines
2.2 KiB
Plaintext
78 lines
2.2 KiB
Plaintext
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_TRANSFERFUNCTION
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#define OSG_TRANSFERFUNCTION 1
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#include <osg/Texture>
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#include <osg/Shader>
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namespace osg {
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/** TransferFunction used to manage the mapping for 1D, 2D or 3D input to output Vec4 values.
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*/
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class OSG_EXPORT TransferFunction
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{
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public :
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TransferFunction();
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virtual ~TransferFunction();
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osg::Image* getImage() { return _image.get(); }
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const osg::Image* getImage() const { return _image.get(); }
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osg::Texture* getTexture() { return _texture.get(); }
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const osg::Texture* getTexture() const { return _texture.get(); }
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osg::Shader* getShader() { return _shader.get(); }
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const osg::Shader* getShader() const { return _shader.get(); }
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protected:
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typedef std::vector<osg::Vec4> Colors;
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Colors _colors;
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osg::ref_ptr<osg::Image> _image;
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osg::ref_ptr<osg::Texture> _texture;
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osg::ref_ptr<osg::Shader> _shader;
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};
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class OSG_EXPORT TransferFunction1D : public osg::TransferFunction
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{
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public:
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TransferFunction1D();
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void setInputRange(float minimum, float maximum);
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void allocate(unsigned int numX);
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void clear(const osg::Vec4& color = osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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unsigned int getNumberCellsX() const { return _colors.size(); }
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osg::Vec4& getValue(unsigned int i) { return _colors[i]; }
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const osg::Vec4& getValue(unsigned int i) const { return _colors[i]; }
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protected:
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float _minimum;
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float _maximum;
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};
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}
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#endif
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