public static void CreateShadowMapForAllLights(Scene scene)
{
if (scene == null)
{
throw new ArgumentNullException("scene");
}
Vector3 maxWorld = new Vector3(float.MinValue, float.MinValue, float.MinValue);
Vector3 minWorld = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
foreach (var n in scene.Geometries)
{
FrameSkin skin = n.Component as FrameSkin;
if (skin != null)
{
TransformSkin(skin.Skin, ref minWorld, ref maxWorld, Matrix.Identity);
}
FrameMesh meshContainer = n.Component as FrameMesh;
if (meshContainer != null)
{
Mesh mesh = meshContainer.Mesh;
var globalPose = n.GlobalPose;
var positionView = mesh.GetVertexBufferView <Vector3>(IASemantic.Position);
for (int i = 0; i < positionView.Count; i++)
{
var posWorld = Vector3.TransformCoordinates(positionView[i], globalPose);
maxWorld = Vector3.Max(posWorld, maxWorld);
minWorld = Vector3.Min(posWorld, minWorld);
}
mesh.ReleaseViews();
}
}
foreach (var lightInstance in scene.FrameLights)
{
lightInstance.CreateShadowMap(scene, EngineState.Shadow.ShadowMapping.Size, true, maxWorld, minWorld);
}
if (!EngineState.Shadow.ShadowMapping.Enable)
{
EngineState.Shadow.ShadowMapping.Enable = true;
EngineState.Shadow.Enable = true;
}
}
public ShadowMapTechnique CreateShadowMap(Scene scene, int size, bool isDynamic, Vector3 maxWorld, Vector3 minWorld)
{
if (scene == null)
{
throw new NullReferenceException("Scene");
}
var sm = new ShadowMapTechnique(size)
{
IsDynamic = isDynamic
};
var viewMat = Matrix.LookAt(_globalPosition, _globalPosition + _globalDirection, Vector3.UnitY);
var camera = new Camera();
camera.View = viewMat;
if (_light.Type == LightType.Directional)
{
var centerWorld = 0.5f * (maxWorld + minWorld);
float distance = Vector3.Distance(minWorld, maxWorld) * 0.5f;
var newPosition = centerWorld - _globalDirection * distance;
camera.Position = newPosition;
viewMat = camera.View;
}
Vector3 maxView = new Vector3(float.MinValue, float.MinValue, float.MinValue);
Vector3 minView = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
foreach (var n in scene.Geometries)
{
var meshContainer = n.Component as FrameMesh;
if (meshContainer != null)
{
Mesh mesh = meshContainer.Mesh;
var globalPose = n.GlobalPose;
var pose = globalPose * viewMat;
var positionView = mesh.GetVertexBufferView <Vector3>(IASemantic.Position);
for (int i = 0; i < positionView.Count; i++)
{
var pos = positionView[i];
var posView = Vector3.TransformCoordinates(pos, pose);
maxView = Vector3.Max(posView, maxView);
minView = Vector3.Min(posView, minView);
}
mesh.ReleaseViews();
}
FrameSkin skin = n.Component as FrameSkin;
if (skin != null)
{
TransformSkin(skin.Skin, ref minView, ref maxView, viewMat);
}
}
camera.ZNear = Math.Max(1, minView.Z);
camera.ZFar = Math.Max(2, maxView.Z);
camera.OrthoWidth = maxView.X - minView.X;
camera.OrthoHeight = maxView.Y - minView.Y;
camera.FieldOfView = Numerics.PIover2;
camera.Type = ProjectionType.Orthographic;
sm.Camera = camera;
sm.Affector = Node;
Node.Technique = sm;
sm.OnSceneAttach(scene);
return(sm);
}
