private RandomPointsRenderer(CSharpGL.IBufferable model, CSharpGL.ShaderCode[] shaderCodes, CSharpGL.AttributeMap attributeMap, params GLSwitch[] switches) :
     base(model, shaderCodes, attributeMap, switches)
 {
 }
 private PointCloudRenderer(CSharpGL.IBufferable model, CSharpGL.ShaderCode[] shaderCodes, CSharpGL.AttributeMap attributeMap, params GLState[] switches) :
     base(model, shaderCodes, attributeMap, switches)
 {
 }