/// <summary>
/// Render to the provided instance of OpenGL.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
/// <param name="renderMode">The render mode.</param>
public override void Render(OpenGL gl, RenderMode renderMode)
{
// Create the evaluator.
gl.Map1(OpenGL.GL_MAP1_VERTEX_3, // Use and produce 3D points.
0, // Low order value of 'u'.
1, // High order value of 'u'.
3, // Size (bytes) of a control point.
ControlPoints.Width, // Order (i.e degree plus one).
ControlPoints.ToFloatArray()); // The control points.
// Enable the type of evaluator we wish to use.
gl.Enable(OpenGL.GL_MAP1_VERTEX_3);
// Beging drawing a line strip.
gl.Begin(OpenGL.GL_LINE_STRIP);
// Now draw it.
for (int i = 0; i <= segments; i++)
{
gl.EvalCoord1((float)i / segments);
}
gl.End();
// Draw the control points.
ControlPoints.Draw(gl, DrawControlPoints, DrawControlGrid);
}
