MaterialDef Topology {
    MaterialParameters {
        Float Interval      : 10.0
        Float LineWidth     : 0.12
        Float Opacity       : 0.55
    }
    Technique {
        VertexShader   GLSL150: Shaders/Topology.vert
        FragmentShader GLSL150: Shaders/Topology.frag
        WorldParameters {
            WorldViewProjectionMatrix
            WorldMatrix
        }
        RenderState {
            Blend Alpha
            DepthWrite Off
        }
    }
}