Hi, I try to build a very simple shape, represented in sketch.png.
Code: osg::Vec3Array *points = new osg::Vec3Array(); points->push_back( osg::Vec3( -0.5f, -0.5f, -0.5f ) ); points->push_back( osg::Vec3( 0.5f, -0.5f, -0.5f ) ); points->push_back( osg::Vec3( -0.5f, 0.5f, -0.5f ) ); points->push_back( osg::Vec3( 0.5f, 0.5f, -0.5f ) ); points->push_back( osg::Vec3( 0.5f, 0.5f, 0.5f ) ); points->push_back( osg::Vec3( -0.5f, 0.5f, 0.5f ) ); osg::DrawElementsUInt *faces = new osg::DrawElementsUInt(GL_TRIANGLES); faces->push_back(2); faces->push_back(0); faces->push_back(1); faces->push_back(2); faces->push_back(1); faces->push_back(3); Then three versions left Code: faces->push_back(2); faces->push_back(3); faces->push_back(4); faces->push_back(2); faces->push_back(4); faces->push_back(5); center Code: faces->push_back(3); faces->push_back(4); faces->push_back(2); faces->push_back(4); faces->push_back(5); faces->push_back(2); right Code: faces->push_back(4); faces->push_back(2); faces->push_back(3); faces->push_back(5); faces->push_back(2); faces->push_back(4); The order of vertices in center and right version is only rotated from the left version. Then I add the normals, with BIND_PER_VERTEX. I use a flat render mode. Why only the left version gives the correct result? Is there a rule for the vertex ordering? Thank you! ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53340#53340 Attachments: http://forum.openscenegraph.org//files/result_209.png http://forum.openscenegraph.org//files/sketch_204.png _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
