/// <summary>
/// Update shadow map.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
public override void UpdateShadowMap(GraphicsContext ctx, SceneGraph shadowGraph)
{
CheckCurrentContext(ctx);
if (shadowGraph == null)
{
throw new ArgumentNullException("shadowGraph");
}
// Compute light matrix
IModelMatrix viewMatrix = new ModelMatrix(); // LocalModel.Multiply(LightMatrix.GetInverseMatrix()).GetInverseMatrix();
viewMatrix.LookAtDirection((Vertex3d)LocalModel.Position, (Vertex3f)Direction, Vertex3d.UnitY);
// Set light scene view
shadowGraph.ProjectionMatrix = new PerspectiveProjectionMatrix(FalloffAngle * 2.0f, 1.0f, 0.1f, 100.0f);
shadowGraph.ViewMatrix = viewMatrix;
_ShadowFramebuffer.BindDraw(ctx);
// Reset viewport
new ViewportState(0, 0, (int)_ShadowMap.Width, (int)_ShadowMap.Height).Apply(ctx, null);
_ShadowFramebuffer.Clear(ctx, ClearBufferMask.DepthBufferBit);
shadowGraph.Draw(ctx, _ShadowProgram);
_ShadowFramebuffer.UnbindDraw(ctx);
// Cache view matrix
_ShadowViewMatrix = _BiasMatrix.Multiply(shadowGraph.ProjectionMatrix.Multiply(viewMatrix));
}
public void GenerateShadowMaps(GraphicsContext ctx, SceneGraph sceneGraph)
{
if (sceneGraph == null)
{
throw new ArgumentNullException("sceneGraph");
}
// Push current viewport to be restore later
State.ViewportState currentViewport = new State.ViewportState(ctx);
foreach (SceneObjectLight sceneLight in ShadowLights)
{
using (SceneGraph shadowGraph = new SceneGraph(sceneGraph,
//SceneGraphFlags.CullingViewFrustum | SceneGraphFlags.StateSorting
SceneGraphFlags.None
))
{
shadowGraph.SceneRoot.ObjectState.DefineState(new State.CullFaceState(CullFaceMode.Back));
sceneLight.UpdateShadowMap(ctx, shadowGraph);
}
}
// Restore viewport
currentViewport.Apply(ctx, null);
// Restore cull face state to default
State.CullFaceState.DefaultState.Apply(ctx, null);
}
public SceneGraphContext(SceneGraph sceneGraph) : this(sceneGraph, null)
{
if (sceneGraph == null)
{
throw new ArgumentNullException("sceneGraph");
}
Scene = sceneGraph;
}
/// <summary>
/// Static constructor.
/// </summary>
static SceneObject()
{
// Static initialization
SceneGraph.Touch();
SceneObjectCamera.Touch();
SceneObjectGeometry.Touch();
SceneObjectLight.Touch();
SceneObjectLightZone.Touch();
}
public SceneGraphContext(SceneGraph sceneGraph)
{
if (sceneGraph == null)
{
throw new ArgumentNullException("sceneGraph");
}
Scene = sceneGraph;
ViewFrustumPlanes = Plane.GetFrustumPlanes(Scene.ProjectionMatrix);
}
public SceneGraphContext(SceneGraph sceneGraph, SceneObjectCamera currentView)
{
if (sceneGraph == null)
{
throw new ArgumentNullException("sceneGraph");
}
Scene = sceneGraph;
CurrentView = currentView;
}
/// <summary>
/// Construct a SceneGraph.
/// </summary>
/// <param name="otherScene">
/// The <see cref="SceneGraph"/> to be copied.
/// </param>
public SceneGraph(SceneGraph otherScene, SceneGraphFlags flags)
: this(flags)
{
if (otherScene == null)
{
throw new ArgumentNullException("otherScene");
}
CurrentView = otherScene.CurrentView;
ProjectionMatrix = otherScene.ProjectionMatrix;
ViewMatrix = otherScene.ViewMatrix;
SceneRoot = otherScene.SceneRoot;
}
/// <summary>
/// Update shadow map.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
public virtual void UpdateShadowMap(GraphicsContext ctx, SceneGraph shadowGraph)
{
}