151 lines
5.5 KiB
C++
151 lines
5.5 KiB
C++
/* -*-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.
|
|
*/
|
|
|
|
#include <osg/TexEnv>
|
|
#include <osg/TexEnvCombine>
|
|
|
|
#include <osgFX/MultiTextureControl>
|
|
|
|
using namespace osg;
|
|
using namespace osgFX;
|
|
|
|
MultiTextureControl::MultiTextureControl()
|
|
{
|
|
}
|
|
|
|
MultiTextureControl::MultiTextureControl(const MultiTextureControl& copy, const osg::CopyOp& copyop):
|
|
Group(copy,copyop),
|
|
_textureWeightList(copy._textureWeightList)
|
|
{
|
|
updateStateSet();
|
|
}
|
|
|
|
void MultiTextureControl::setTextureWeight(unsigned int unit, float weight)
|
|
{
|
|
if (unit >= _textureWeightList.size())
|
|
{
|
|
_textureWeightList.resize(unit+1,0.0f);
|
|
}
|
|
_textureWeightList[unit] = weight;
|
|
|
|
updateStateSet();
|
|
}
|
|
|
|
void MultiTextureControl::updateStateSet()
|
|
{
|
|
osg::ref_ptr<osg::StateSet> stateset = new osg::StateSet;
|
|
|
|
unsigned int numTextureUnitsOn = 0;
|
|
unsigned int unit;
|
|
for(unit=0;unit<_textureWeightList.size();++unit)
|
|
{
|
|
if (_textureWeightList[unit]>0.0f) ++numTextureUnitsOn;
|
|
}
|
|
|
|
if (numTextureUnitsOn<=1)
|
|
{
|
|
for(unit=0;unit<_textureWeightList.size();++unit)
|
|
{
|
|
if (_textureWeightList[unit]>0.0f)
|
|
{
|
|
osg::TexEnv* texenv = new osg::TexEnv(osg::TexEnv::MODULATE);
|
|
stateset->setTextureAttribute(unit, texenv);
|
|
stateset->setTextureMode(unit, GL_TEXTURE_2D, osg::StateAttribute::ON);
|
|
}
|
|
else
|
|
{
|
|
stateset->setTextureMode(unit, GL_TEXTURE_2D, osg::StateAttribute::OFF | osg::StateAttribute::OVERRIDE);
|
|
}
|
|
}
|
|
|
|
}
|
|
else if (_textureWeightList.size()==2)
|
|
{
|
|
{
|
|
osg::TexEnvCombine* texenv = new osg::TexEnvCombine;
|
|
texenv->setCombine_RGB(osg::TexEnvCombine::INTERPOLATE);
|
|
texenv->setSource0_RGB(osg::TexEnvCombine::TEXTURE0+0);
|
|
texenv->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource1_RGB(osg::TexEnvCombine::TEXTURE0+1);
|
|
texenv->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource2_RGB(osg::TexEnvCombine::CONSTANT);
|
|
texenv->setOperand2_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
|
|
float r = _textureWeightList[0]/(_textureWeightList[0]+_textureWeightList[1]);
|
|
texenv->setConstantColor(osg::Vec4(r,r,r,r));
|
|
|
|
stateset->setTextureAttribute(0, texenv);
|
|
}
|
|
|
|
{
|
|
osg::TexEnvCombine* texenv = new osg::TexEnvCombine;
|
|
texenv->setCombine_RGB(osg::TexEnvCombine::MODULATE);
|
|
texenv->setSource0_RGB(osg::TexEnvCombine::PREVIOUS);
|
|
texenv->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource1_RGB(osg::TexEnvCombine::PRIMARY_COLOR);
|
|
texenv->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
|
|
stateset->setTextureAttribute(1, texenv);
|
|
}
|
|
}
|
|
else if (_textureWeightList.size()==3)
|
|
{
|
|
float b = (_textureWeightList[0]+_textureWeightList[1])/(_textureWeightList[0]+_textureWeightList[1]+_textureWeightList[2]);
|
|
float a = _textureWeightList[0]/(_textureWeightList[0]+_textureWeightList[1]);
|
|
|
|
{
|
|
osg::TexEnvCombine* texenv = new osg::TexEnvCombine;
|
|
texenv->setCombine_RGB(osg::TexEnvCombine::INTERPOLATE);
|
|
texenv->setSource0_RGB(osg::TexEnvCombine::TEXTURE0+0);
|
|
texenv->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource1_RGB(osg::TexEnvCombine::TEXTURE0+1);
|
|
texenv->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource2_RGB(osg::TexEnvCombine::CONSTANT);
|
|
texenv->setOperand2_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
|
|
texenv->setConstantColor(osg::Vec4(a,a,a,a));
|
|
|
|
stateset->setTextureAttribute(0, texenv);
|
|
}
|
|
|
|
{
|
|
osg::TexEnvCombine* texenv = new osg::TexEnvCombine;
|
|
texenv->setCombine_RGB(osg::TexEnvCombine::INTERPOLATE);
|
|
texenv->setSource0_RGB(osg::TexEnvCombine::PREVIOUS);
|
|
texenv->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource1_RGB(osg::TexEnvCombine::TEXTURE0+2);
|
|
texenv->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource2_RGB(osg::TexEnvCombine::CONSTANT);
|
|
texenv->setOperand2_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
|
|
texenv->setConstantColor(osg::Vec4(b,b,b,b));
|
|
|
|
stateset->setTextureAttribute(1, texenv);
|
|
}
|
|
|
|
{
|
|
osg::TexEnvCombine* texenv = new osg::TexEnvCombine;
|
|
texenv->setCombine_RGB(osg::TexEnvCombine::MODULATE);
|
|
texenv->setSource0_RGB(osg::TexEnvCombine::PREVIOUS);
|
|
texenv->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
texenv->setSource1_RGB(osg::TexEnvCombine::PRIMARY_COLOR);
|
|
texenv->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR);
|
|
|
|
stateset->setTextureAttribute(2, texenv);
|
|
}
|
|
}
|
|
|
|
setStateSet(stateset.get());
|
|
}
|
|
|