/usr/include/osgUtil/CubeMapGenerator is in libopenscenegraph-dev 3.2.1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef OSGUTIL_CUBEMAPGENERATOR_
#define OSGUTIL_CUBEMAPGENERATOR_
#include <osgUtil/Export>
#include <osg/Vec3>
#include <osg/Vec4>
#include <osg/CopyOp>
#include <osg/Referenced>
#include <osg/TextureCubeMap>
#include <osg/Image>
#include <osg/Notify>
#include <vector>
namespace osgUtil
{
/** This is the base class for cube map generators.
It exposes the necessary interface to access the six generated images;
descendants should only override the compute_color() method.
*/
class OSGUTIL_EXPORT CubeMapGenerator: public osg::Referenced {
public:
explicit CubeMapGenerator(int texture_size = 64);
CubeMapGenerator(const CubeMapGenerator ©, const osg::CopyOp ©op = osg::CopyOp::SHALLOW_COPY);
inline osg::Image *getImage(osg::TextureCubeMap::Face face);
inline const osg::Image *getImage(osg::TextureCubeMap::Face face) const;
/** Generate the six cube images.
If use_osg_system is true, then the OSG's coordinate system is used instead
of the default OpenGL one.
*/
void generateMap(bool use_osg_system = true);
protected:
virtual ~CubeMapGenerator() {}
CubeMapGenerator &operator=(const CubeMapGenerator &) { return *this; }
inline void set_pixel(int index, int c, int r, const osg::Vec4 &color);
inline static osg::Vec4 vector_to_color(const osg::Vec3 &vec);
/** Override this method to define how colors are computed.
The parameter R is the reflection vector, pointing from the center of the cube.
The return value should be the RGBA color associated with that reflection ray.
*/
virtual osg::Vec4 compute_color(const osg::Vec3 &R) const = 0;
private:
int texture_size_;
typedef std::vector<osg::ref_ptr<osg::Image> > Image_list;
Image_list images_;
};
// INLINE METHODS
inline osg::Image *CubeMapGenerator::getImage(osg::TextureCubeMap::Face face)
{
switch (face) {
case osg::TextureCubeMap::POSITIVE_X: return images_[0].get();
case osg::TextureCubeMap::NEGATIVE_X: return images_[1].get();
case osg::TextureCubeMap::POSITIVE_Y: return images_[2].get();
case osg::TextureCubeMap::NEGATIVE_Y: return images_[3].get();
case osg::TextureCubeMap::POSITIVE_Z: return images_[4].get();
case osg::TextureCubeMap::NEGATIVE_Z: return images_[5].get();
default: return 0;
}
}
inline const osg::Image *CubeMapGenerator::getImage(osg::TextureCubeMap::Face face) const
{
switch (face) {
case osg::TextureCubeMap::POSITIVE_X: return images_[0].get();
case osg::TextureCubeMap::NEGATIVE_X: return images_[1].get();
case osg::TextureCubeMap::POSITIVE_Y: return images_[2].get();
case osg::TextureCubeMap::NEGATIVE_Y: return images_[3].get();
case osg::TextureCubeMap::POSITIVE_Z: return images_[4].get();
case osg::TextureCubeMap::NEGATIVE_Z: return images_[5].get();
default: return 0;
}
}
inline void CubeMapGenerator::set_pixel(int index, int c, int r, const osg::Vec4 &color)
{
osg::Image *i = images_[index].get();
if (i) {
*(i->data(c, r)+0) = static_cast<unsigned char>(osg::clampBetween(color.x(),0.0f,1.0f) * 255);
*(i->data(c, r)+1) = static_cast<unsigned char>(osg::clampBetween(color.y(),0.0f,1.0f) * 255);
*(i->data(c, r)+2) = static_cast<unsigned char>(osg::clampBetween(color.z(),0.0f,1.0f) * 255);
*(i->data(c, r)+3) = static_cast<unsigned char>(osg::clampBetween(color.w(),0.0f,1.0f) * 255);
} else {
osg::notify(osg::WARN) << "Warning: CubeMapGenerator::set_pixel(): invalid image index\n";
}
}
inline osg::Vec4 CubeMapGenerator::vector_to_color(const osg::Vec3 &vec)
{
return osg::Vec4(
vec.x() / vec.length() / 2 + 0.5f,
vec.y() / vec.length() / 2 + 0.5f,
vec.z() / vec.length() / 2 + 0.5f,
1);
}
}
#endif
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