private void SetGlContext()
{
GL.ClearDepth(1.0);
GL.Clear(ClearBufferMask.DepthBufferBit); // Clear the Depth Buffer
GL.PushAttrib(AttribMask.ViewportBit);
RectangleDouble screenRect = this.TransformToScreenSpace(LocalBounds);
GL.Viewport((int)screenRect.Left, (int)screenRect.Bottom, (int)screenRect.Width, (int)screenRect.Height);
GL.ShadeModel(ShadingModel.Smooth);
GL.FrontFace(FrontFaceDirection.Ccw);
GL.CullFace(CullFaceMode.Back);
GL.DepthFunc(DepthFunction.Lequal);
GL.Disable(EnableCap.DepthTest);
ClearToGradient();
#if DO_LIGHTING
GL.Light(LightName.Light0, LightParameter.Ambient, ambientLight);
GL.Light(LightName.Light0, LightParameter.Diffuse, diffuseLight0);
GL.Light(LightName.Light0, LightParameter.Specular, specularLight0);
GL.Light(LightName.Light0, LightParameter.Ambient, new float[] { 0, 0, 0, 0 });
GL.Light(LightName.Light1, LightParameter.Diffuse, diffuseLight1);
GL.Light(LightName.Light1, LightParameter.Specular, specularLight1);
GL.ColorMaterial(MaterialFace.FrontAndBack, ColorMaterialParameter.AmbientAndDiffuse);
GL.Enable(EnableCap.Light0);
GL.Enable(EnableCap.Light1);
GL.Enable(EnableCap.DepthTest);
GL.Enable(EnableCap.Blend);
GL.Enable(EnableCap.Normalize);
GL.Enable(EnableCap.Lighting);
GL.Enable(EnableCap.ColorMaterial);
Vector3 lightDirectionVector = new Vector3(lightDirection0[0], lightDirection0[1], lightDirection0[2]);
lightDirectionVector.Normalize();
lightDirection0[0] = (float)lightDirectionVector.x;
lightDirection0[1] = (float)lightDirectionVector.y;
lightDirection0[2] = (float)lightDirectionVector.z;
GL.Light(LightName.Light0, LightParameter.Position, lightDirection0);
GL.Light(LightName.Light1, LightParameter.Position, lightDirection1);
#endif
// set the projection matrix
GL.MatrixMode(MatrixMode.Projection);
GL.PushMatrix();
GL.LoadMatrix(ProjectionMatrix.GetAsDoubleArray());
// set the modelview matrix
GL.MatrixMode(MatrixMode.Modelview);
GL.PushMatrix();
GL.LoadMatrix(ModelviewMatrix.GetAsDoubleArray());
}
/// <summary>
/// Converts ModelviewMatrix to a float[].
/// </summary>
/// <returns>A float[] containing all the values from the initial matrix.</returns>
public float[] ToArray()
{
return(ModelviewMatrix.to_array());
}
