[osg-users] Visualizing a light cone in scene

[Ekaterina Fokina]

Hi,

I am doing something similar. If you want to have your cone tilted attach it to your air vehicle using MatrixTransform, like in the example "osgspheresegment":

        osg::MatrixTransform* positioned = new osg::MatrixTransform;
        positioned->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
        positioned->setDataVariance(osg::Object::STATIC);
        positioned->setMatrix(osg::Matrix::translate(-bs.center())*
                                     osg::Matrix::scale(size,size,size)*
                                     osg::Matrix::rotate(osg::inDegrees(180.0f),0.0f,0.0f,1.0f));

        positioned->addChild(cessna);
        positioned->addChild(lod);

        osg::MatrixTransform* xform = new osg::MatrixTransform;
        xform->setUpdateCallback(new
osg::AnimationPathCallback(animationPath,0.0f,2.0));
        xform->addChild(positioned);

       model->addChild(xform);


Could you please tell, how did you make the trace on the ground?

Thank you!

Cheers,
Ekaterina

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=69968#69968