133 lines
4.2 KiB
C++
133 lines
4.2 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 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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#include <osg/TexGen>
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#include <osg/Notify>
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#include <osg/io_utils>
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using namespace osg;
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TexGen::TexGen()
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{
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_mode = OBJECT_LINEAR;
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_plane_s.set(1.0f, 0.0f, 0.0f, 0.0f);
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_plane_t.set(0.0f, 1.0f, 0.0f, 0.0f);
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_plane_r.set(0.0f, 0.0f, 1.0f, 0.0f);
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_plane_q.set(0.0f, 0.0f, 0.0f, 1.0f);
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}
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TexGen::~TexGen()
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{
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}
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void TexGen::setPlane(Coord which, const Plane& plane)
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{
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switch( which )
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{
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case S : _plane_s = plane; break;
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case T : _plane_t = plane; break;
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case R : _plane_r = plane; break;
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case Q : _plane_q = plane; break;
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default : notify(WARN)<<"Error: invalid 'which' passed TexGen::setPlane("<<(unsigned int)which<<","<<plane<<")"<<std::endl; break;
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}
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}
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const Plane& TexGen::getPlane(Coord which) const
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{
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switch( which )
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{
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case S : return _plane_s;
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case T : return _plane_t;
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case R : return _plane_r;
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case Q : return _plane_q;
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default : notify(WARN)<<"Error: invalid 'which' passed TexGen::getPlane(which)"<<std::endl; return _plane_r;
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}
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}
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Plane& TexGen::getPlane(Coord which)
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{
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switch( which )
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{
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case S : return _plane_s;
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case T : return _plane_t;
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case R : return _plane_r;
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case Q : return _plane_q;
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default : notify(WARN)<<"Error: invalid 'which' passed TexGen::getPlane(which)"<<std::endl; return _plane_r;
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}
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}
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void TexGen::setPlanesFromMatrix(const Matrixd& matrix)
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{
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_plane_s.set(matrix(0,0),matrix(1,0),matrix(2,0),matrix(3,0));
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_plane_t.set(matrix(0,1),matrix(1,1),matrix(2,1),matrix(3,1));
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_plane_r.set(matrix(0,2),matrix(1,2),matrix(2,2),matrix(3,2));
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_plane_q.set(matrix(0,3),matrix(1,3),matrix(2,3),matrix(3,3));
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}
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void TexGen::apply(State&) const
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{
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if (_mode == OBJECT_LINEAR)
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{
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glTexGenfv(GL_S, GL_OBJECT_PLANE, _plane_s.ptr());
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glTexGenfv(GL_T, GL_OBJECT_PLANE, _plane_t.ptr());
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glTexGenfv(GL_R, GL_OBJECT_PLANE, _plane_r.ptr());
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glTexGenfv(GL_Q, GL_OBJECT_PLANE, _plane_q.ptr());
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, _mode );
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}
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else if (_mode == EYE_LINEAR)
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{
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glTexGenfv(GL_S, GL_EYE_PLANE, _plane_s.ptr());
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glTexGenfv(GL_T, GL_EYE_PLANE, _plane_t.ptr());
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glTexGenfv(GL_R, GL_EYE_PLANE, _plane_r.ptr());
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glTexGenfv(GL_Q, GL_EYE_PLANE, _plane_q.ptr());
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, _mode );
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}
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else if (_mode == NORMAL_MAP)
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{
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, _mode );
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// glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, _mode );
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}
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else if (_mode == REFLECTION_MAP)
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{
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, _mode );
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// glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, _mode );
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}
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else // SPHERE_MAP
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{
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// We ignore the planes if we are not in OBJECT_ or EYE_LINEAR mode.
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// Also don't set the mode of GL_R & GL_Q as these will generate
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// GL_INVALID_ENUM (See OpenGL Refrence Guide, glTexGEn.)
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glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, _mode );
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glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, _mode );
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}
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}
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