Martin Gräßlin authored Dec 05, 2010 and Martin Flöser committed Jan 30, 2011

A color can be specified to render the geometry of the VBO.
For legacy painting glColor is used, for shader a uniform is set.
In order to allow rendering without texcoords, it is possible to pass
a null pointer as texcoords.
Shader added to scene which just renders a colored geometry without texturing.