private void ShadowMapping(SceneNodeBase sceneElement, ShdowMappingEventArgs arg)
{
if (sceneElement != null)
{
var lightContainer = sceneElement as ILocalLightContainer;
if (lightContainer != null)
{
foreach (var light in lightContainer.LightList)
{
arg.CurrentLight = light;
light.Begin();
foreach (var child in sceneElement.Children)
{
this.CastShadow(child, arg);
}
light.End();
arg.CurrentLight = null;
}
}
foreach (var child in sceneElement.Children)
{
this.ShadowMapping(child, arg);
}
}
}
/// <summary>
/// Cast shadow.(Prepare shadow mapping texture)
/// </summary>
public override void Act()
{
GL.Instance.ClearColor(1, 1, 1, 1);
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT);
var arg = new ShdowMappingEventArgs();
this.ShadowMapping(this.Scene.RootElement, arg);
}
private void CastShadow(SceneNodeBase sceneElement, ShdowMappingEventArgs arg)
{
if (sceneElement != null)
{
var renderable = sceneElement as IShadowMapping;
if (renderable != null && renderable.EnableShadowMapping)
{
renderable.CastShadow(arg);
}
foreach (var item in sceneElement.Children)
{
CastShadow(item, arg);
}
}
}
public void CastShadow(ShdowMappingEventArgs arg)
{
if (!this.IsInitialized)
{
this.Initialize();
}
LightBase light = arg.CurrentLight;
mat4 projection = light.GetProjectionMatrix();
mat4 view = light.GetViewMatrix();
mat4 model = this.GetModelMatrix();
var method = this.RenderUnit.Methods[0]; // shadowmapBuilder
ShaderProgram program = method.Program;
program.SetUniform(mvpMatrix, projection * view * model);
method.Render();
}
