/// <summary>
/// This is the main function of the class, it'll create a triangulated polygon
/// from and SceneObject.
/// </summary>
/// <param name="gl">The gl.</param>
/// <param name="sourceObject">The object to convert.</param>
/// <param name="guarenteedView">A camera that can see the whole object.</param>
/// <returns>
/// A polygon created from 'sourceObject'.
/// </returns>
public Polygon CreatePolygon(OpenGL gl, IRenderable sourceObject, Camera guarenteedView)
{
// Save the current camera data.
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.PushMatrix();
// Look through the camera that can see the object.
guarenteedView.Project(gl);
// Start triangulation.
Begin(gl);
// Draw the object.
sourceObject.Render(gl, RenderMode.Design);
// End triangulation.
End(gl);
Polygon newPoly = Triangle;
newPoly.Name = (sourceObject is SceneElement ? ((SceneElement)sourceObject).Name : "Object") + " (Triangulated Poly)";
return newPoly;
}
/// <summary>
/// This function draws all of the objects in the scene (i.e. every quadric
/// in the quadrics arraylist etc).
/// </summary>
public virtual void Draw(Camera camera = null)
{
// TODO: we must decide what to do about drawing - are
// cameras completely outside of the responsibility of the scene?
// If no camera has been provided, use the current one.
if (camera == null)
camera = currentCamera;
// Set the clear color.
float[] clear = clearColour;
gl.ClearColor(clear[0], clear[1], clear[2], clear[3]);
// Reproject.
if (camera != null)
camera.Project(gl);
// Clear.
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT |
OpenGL.GL_STENCIL_BUFFER_BIT);
//gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
// Render the root element, this will then render the whole
// of the scene tree.
RenderElement(sceneContainer, RenderMode.Design);
// TODO: Adding this code here re-enables textures- it should work without it but it
// doesn't, look into this.
//gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
//gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.Flush();
}