/// <summary>
/// Draw this SceneGraphObject.
/// </summary>
/// <param name="ctx">
/// The <see cref="GraphicsContext"/> used for drawing.
/// </param>
public void Draw(GraphicsContext ctx)
{
CheckCurrentContext(ctx);
using (SceneGraphContext ctxScene = new SceneGraphContext(this, _CurrentView)) {
// Override model-view-projection matrices if a camera is defined
if (_CurrentView != null)
{
LocalProjection = _CurrentView.ProjectionMatrix;
LocalModel = _CurrentView.LocalModel.GetInverseMatrix();
}
// Update
base.Update(ctx, ctxScene);
// Base implementation
base.Draw(ctx, ctxScene);
}
}
/// <summary>
/// Update this SceneGraphObject hierarchy.
/// </summary>
/// <param name="ctx">
/// The <see cref="GraphicsContext"/> used for drawing.
/// </param>
/// <param name="ctxScene">
/// The <see cref="SceneGraphContext"/> used for drawing.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="ctx"/> is null.
/// </exception>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="ctx"/> is not current on the calling thread.
/// </exception>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="ctxScene"/>.
/// </exception>
protected internal virtual void Update(GraphicsContext ctx, SceneGraphContext ctxScene)
{
CheckCurrentContext(ctx);
if (ctxScene == null)
{
throw new ArgumentNullException("ctxScene");
}
// Update this object
UpdateThis(ctx, ctxScene);
// Update all children
foreach (SceneGraphObject sceneGraphObject in _Children)
{
sceneGraphObject.Update(ctx, ctxScene);
}
}
/// <summary>
/// Draw this SceneGraphObject hierarchy.
/// </summary>
/// <param name="ctx">
/// The <see cref="GraphicsContext"/> used for drawing.
/// </param>
/// <param name="ctxScene">
/// The <see cref="SceneGraphContext"/> used for drawing.
/// </param>
protected internal override void Draw(GraphicsContext ctx, SceneGraphContext ctxScene)
{
if (ctxScene == null)
{
throw new ArgumentNullException("ctxScene");
}
CheckCurrentContext(ctx);
// Push and merge the graphics state
ctxScene.GraphicsStateStack.Push(_ObjectState);
try {
// Draw all children
foreach (SceneGraphObject sceneGraphObject in _Children)
{
sceneGraphObject.Draw(ctx, ctxScene);
}
} finally {
ctxScene.GraphicsStateStack.Pop();
}
}
/// <summary>
/// Draw this SceneGraphObject instance.
/// </summary>
/// <param name="ctx">
/// The <see cref="GraphicsContext"/> used for drawing.
/// </param>
/// <param name="ctxScene">
/// The <see cref="SceneGraphContext"/> used for drawing.
/// </param>
protected virtual void DrawThis(GraphicsContext ctx, SceneGraphContext ctxScene)
{
}
/// <summary>
/// Update this SceneGraphObject instance.
/// </summary>
/// <param name="ctx">
/// The <see cref="GraphicsContext"/> used for drawing.
/// </param>
/// <param name="ctxScene">
/// The <see cref="SceneGraphContext"/> used for drawing.
/// </param>
protected virtual void UpdateThis(GraphicsContext ctx, SceneGraphContext ctxScene)
{
}