Hi Gordon, Color matrix in OpenGL is used for color space conversion, for example using color matric you can convert RGB to BGR , RGB to CMY. Unfortunately i do not have any screen grabs for the moment, but i am trying to achieve night vision effect using this code , RJ
Gordon Tomlinson wrote: > Having never used a ColorMatrix in OpenGL or OSG > > What effect is this supposed to produce ? > > Do you have screen grabs of what it should look like if done in raw Opengl ? > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Rahul Jain > Sent: Monday, July 28, 2008 10:40 AM > To: 'OpenSceneGraph Users' > Subject: [osg-users] Problem using osg::ColorMatrix > > Hi all, > I am trying to use OpenFL color matrix functionality through > osg::ColorMatrix but not able to do so. When i apply this to a node > |(cessna.osg) i do not see any effect. I am pasting the code below for > you guys to have a look. > I don't know what am i doing wrong in this simple piece of code . > cheers RJ > > > int main(int argc, char** argv) > { > osg::MatrixTransform* cessnaMT = new osg::MatrixTransform; > > > osg::Node* cessna = osgDB::readNodeFile("cessna.osg"); > cessnaMT->addChild(cessna); > > // Set color matrix > osg::ColorMatrix* colorMatrix = new osg::ColorMatrix; > const osg::Matrix cm (0.15, 0.0, 0.0, 0.0, > 0.0, 0.3, 0.0, 0.0, > 0.05, 0.0, 0.0, 0.0, > 0.0, 0.0, 0.0, 1.0); > > colorMatrix->setMatrix(cm); > > cessnaMT->getOrCreateStateSet()->setAttributeAndModes(colorMatrix, > osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON); > > osgViewer::Viewer viewer; > > // add model to viewer. > viewer.setSceneData(cessnaMT); > > viewer.run(); > > return 0; > > } > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
