Hi folks, I have a strange problem: I want to draw a cube out of 6 PrimitiveSets containing Triangle Strips. Unfortunately, only the one PrimitiveSet out of the first 4 vertices is displayed.
It does not matter, if I set a different starting index than 0 in the DrawArrays (seems to be ignored), only the first 4 vertices are used. If I switch the order of the push_back instruction e.g. for the back and the top plane (so that the top plane vertices are at the beginning of the array), then only the top plane will be displayed. If I set the start index in the first DrawArrays e.g. to 4 and comment out all other PrimitiveSets, still the back plane is displayed, not the top plane as expected. Does anyone know what is wrong with my code? Or any other suggestions? Code: double f64HalfCarLength = 2.0; double f64HalfCarWidth = 1.0; double f64CarHeight = 1.5; m_pCarModelBoxGeode = new osg::Geode(); m_pCarModelTrafo->addChild(m_pCarModelBoxGeode); m_pCarModelBoxDrawable = new osg::Geometry(); m_pCarModelBoxGeode->addDrawable(m_pCarModelBoxDrawable); m_pCarModelBoxDrawable->setUseDisplayList(true); //Set Vertices m_pCarModelBoxVertices = new osg::Vec3Array(); m_pCarModelBoxVertices->reserve(24); m_pCarModelBoxDrawable->setVertexArray(m_pCarModelBoxVertices); //Back plane of the car m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,-f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,-f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,f64HalfCarWidth,f64CarHeight)); //Top plane of the car m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,-f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,-f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,f64HalfCarWidth,f64CarHeight)); //Front plane of the car m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,-f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,-f64HalfCarWidth,0.0)); //Right plane of the car m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,-f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,-f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,-f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,-f64HalfCarWidth,0.0)); //Bottom plane of the car m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,+f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,-f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,-f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,+f64HalfCarWidth,0.0)); //Left plane of the car m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxVertices->push_back(osg::Vec3(f64HalfCarLength,f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,f64HalfCarWidth,0.0)); m_pCarModelBoxVertices->push_back(osg::Vec3(-f64HalfCarLength,f64HalfCarWidth,f64CarHeight)); m_pCarModelBoxDrawable->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_STRIP,0,4)); m_pCarModelBoxDrawable->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_STRIP,4,4)); m_pCarModelBoxDrawable->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_STRIP,8,4)); m_pCarModelBoxDrawable->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_STRIP,12,4)); m_pCarModelBoxDrawable->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_STRIP,16,4)); m_pCarModelBoxDrawable->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLE_STRIP,20,4)); //Set plane normals m_pCarModelBoxNormals = new osg::Vec3Array(); m_pCarModelBoxNormals->reserve(6); m_pCarModelBoxDrawable->setNormalArray(m_pCarModelBoxNormals); m_pCarModelBoxDrawable->setNormalBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET); m_pCarModelBoxNormals->push_back(osg::Vec3(-1.0,0.0,0.0)); //back m_pCarModelBoxNormals->push_back(osg::Vec3(0.0,0.0,1.0)); //top m_pCarModelBoxNormals->push_back(osg::Vec3(1.0,0.0,0.0)); //front m_pCarModelBoxNormals->push_back(osg::Vec3(0.0,-1.0,0.0)); //right m_pCarModelBoxNormals->push_back(osg::Vec3(0.0,0.0,-1.0)); //bottom m_pCarModelBoxNormals->push_back(osg::Vec3(0.0,1.0,0.0)); //left //Set box color m_pCarModelBoxColor = new osg::Vec4Array(); m_pCarModelBoxDrawable->setColorArray(m_pCarModelBoxColor); m_pCarModelBoxDrawable->setColorBinding(osg::Geometry::BIND_OVERALL); m_pCarModelBoxColor->push_back(osg::Vec4(0.5,0.5,0.5,1.0)); Thank you! Cheers, Nicolas ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46292#46292 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
