/// <summary>
/// Handles the OpenGLDraw event of the openGLControl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="RenderEventArgs"/> instance containing the event data.</param>
private void openGLControl_OpenGLDraw(object sender, RenderEventArgs e)
{
// Get the OpenGL object.
OpenGL gl = openGLControl.OpenGL;
// Clear the color and depth buffer.
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
// Load the identity matrix.
gl.LoadIdentity();
// Rotate around the Y axis.
gl.Rotate(rotation, 0.0f, 1.0f, 0.0f);
// Draw a coloured pyramid.
DrawPyramid(gl);
gl.LineWidth(3);// LINES
this.legacyModel.RenderLegacyOpenGL(gl, SharpGL.SceneGraph.Core.RenderMode.Render);
gl.PointSize(20);// POINTS
this.vertexArrayModel.RenderVertexArray(gl, SharpGL.SceneGraph.Core.RenderMode.Render);
gl.LineWidth(1);// LINE_STRIP
SharpGL.SceneGraph.Core.IRenderable renderable = this.element;
renderable.Render(gl, SharpGL.SceneGraph.Core.RenderMode.Render);
// Nudge the rotation.
rotation += 3.0f;
}
/// <summary>
/// Render the element that inherts <see cref="IColorCodedPicking"/> for color coded picking.
/// </summary>
/// <param name="picking"></param>
/// <param name="gl"></param>
/// <param name="renderMode"></param>
public virtual void RenderForPicking(IColorCodedPicking picking, OpenGL gl, SceneGraph.Core.RenderMode renderMode)
{
if (picking != null)
{
picking.PickingBaseID = this.RenderedVertexCount;
// render the element.
SharpGL.SceneGraph.Core.IRenderable renderable = picking;
renderable.Render(gl, renderMode);
uint rendered = this.RenderedVertexCount + picking.GetVertexCount();
if (this.RenderedVertexCount <= rendered)
{
this.RenderedVertexCount = rendered;
}
else
{
throw new OverflowException(
string.Format("Too many geometries({0} + {1} > {2}) for color coded picking.",
this.RenderedVertexCount, picking.GetVertexCount(), uint.MaxValue));
}
}
}
