public void Initialize(RenderView renderView, RenderLight renderLight, IDirectLight light, LightShadowMap shadowMap, int size, ILightShadowMapRenderer renderer)
{
if (renderView == null)
{
throw new ArgumentNullException(nameof(renderView));
}
if (renderLight == null)
{
throw new ArgumentNullException(nameof(renderLight));
}
if (light == null)
{
throw new ArgumentNullException(nameof(light));
}
if (shadowMap == null)
{
throw new ArgumentNullException(nameof(shadowMap));
}
if (renderer == null)
{
throw new ArgumentNullException(nameof(renderer));
}
RenderView = renderView;
RenderLight = renderLight;
Light = light;
Shadow = shadowMap;
Size = size;
FilterType = Shadow.Filter == null || !Shadow.Filter.RequiresCustomBuffer() ? null : Shadow.Filter.GetType();
Renderer = renderer;
Atlas = null; // Reset the atlas, It will be setup after
CascadeCount = 1;
ShadowType = renderer.GetShadowType(Shadow);
}
protected override void OnSceneManagementGetObjectsForShadowGeneration( Camera camera,
RenderLight light, Set<SceneNode> outSceneNodes,
Set<StaticMeshObject> outStaticMeshObjects )
{
float farClipDistance = NearFarClipDistance.Maximum;
LowLevelSceneManagement.WalkForShadowGeneration( camera, light, farClipDistance,
outSceneNodes, outStaticMeshObjects );
}
public LightShadowMapTexture FindShadowMap(RenderView renderView, RenderLight light)
{
foreach (var shadowMap in shadowMaps)
{
if (shadowMap.RenderView == renderView && shadowMap.RenderLight == light)
{
return(shadowMap);
}
}
return(null);
}
public static void WalkForShadowGeneration( Camera camera, RenderLight light,
float farClipDistance, Set<SceneNode> outSceneNodes,
Set<StaticMeshObject> outStaticMeshObjects)
{
switch( light.Type )
{
case RenderLightType.Spot:
WalkSpotLightShadowGeneration( camera, light, outSceneNodes,
outStaticMeshObjects );
break;
case RenderLightType.Point:
WalkPointLightShadowGeneration( camera, light, outSceneNodes,
outStaticMeshObjects );
break;
case RenderLightType.Directional:
WalkDirectionalLightShadowGeneration( camera, light, farClipDistance,
outSceneNodes, outStaticMeshObjects );
break;
}
}
void GetShadowCastersForLight( Camera mainCamera, RenderLight light, int directionalLightPSSMTextureIndex,
Vec3 pointLightFaceDirection, List<SceneNode> outSceneNodes, List<StaticMeshObject> outStaticMeshObjects )
{
switch( light.Type )
{
case RenderLightType.Spot:
WalkSpotLightShadowGeneration( mainCamera, light, outSceneNodes, outStaticMeshObjects );
break;
case RenderLightType.Point:
WalkPointLightShadowGeneration( mainCamera, light, pointLightFaceDirection,
outSceneNodes, outStaticMeshObjects );
break;
case RenderLightType.Directional:
WalkDirectionalLightShadowGeneration( mainCamera, light,
directionalLightPSSMTextureIndex, outSceneNodes, outStaticMeshObjects );
break;
}
}
public bool Update(RenderLight light) => true;
public virtual LightShadowMapTexture CreateShadowMapTexture(RenderView renderView, RenderLight renderLight, IDirectLight light, int shadowMapSize)
{
var shadowMap = shadowMaps.Add();
shadowMap.Initialize(renderView, renderLight, light, light.Shadow, shadowMapSize, this);
return(shadowMap);
}
static bool IsIntersects( RenderLight light, Bounds bounds )
{
if( light.Type == RenderLightType.Point || light.Type == RenderLightType.Spot )
{
//check by bounding sphere
{
Sphere lightSphere = new Sphere( light.Position, light.AttenuationFar );
if( !lightSphere.IsIntersectsBounds( ref bounds ) )
return false;
}
//check by spot light clip planes
if( light.Type == RenderLightType.Spot )
{
Vec3 boundsCenter = bounds.GetCenter();
Vec3 boundsHalfSize = boundsCenter - bounds.Minimum;
foreach( Plane plane in light.SpotLightClipPlanes )
{
if( plane.GetSide( ref boundsCenter, ref boundsHalfSize ) == Plane.Side.Positive )
return false;
}
}
}
return true;
}
static Plane[] GetClipPlanesForPointLightShadowGeneration( Camera mainCamera,
RenderLight light, Vec3 pointLightFaceDirection )
{
Plane[] clipPlanes = new Plane[ 5 ];
Vec3 direction = pointLightFaceDirection;
float attenuationRange = light.AttenuationFar;
Vec3[] points = new Vec3[ 4 ];
if( direction.Equals( Vec3.XAxis, .01f ) )
{
points[ 0 ] = new Vec3( 1, -1, -1 );
points[ 1 ] = new Vec3( 1, -1, 1 );
points[ 2 ] = new Vec3( 1, 1, 1 );
points[ 3 ] = new Vec3( 1, 1, -1 );
clipPlanes[ 4 ] = new Plane( direction, light.Position.X + attenuationRange );
}
else if( direction.Equals( -Vec3.XAxis, .01f ) )
{
points[ 0 ] = new Vec3( -1, 1, -1 );
points[ 1 ] = new Vec3( -1, 1, 1 );
points[ 2 ] = new Vec3( -1, -1, 1 );
points[ 3 ] = new Vec3( -1, -1, -1 );
clipPlanes[ 4 ] = new Plane( direction, -( light.Position.X - attenuationRange ) );
}
else if( direction.Equals( Vec3.YAxis, .01f ) )
{
points[ 0 ] = new Vec3( 1, 1, -1 );
points[ 1 ] = new Vec3( 1, 1, 1 );
points[ 2 ] = new Vec3( -1, 1, 1 );
points[ 3 ] = new Vec3( -1, 1, -1 );
clipPlanes[ 4 ] = new Plane( direction, light.Position.Y + attenuationRange );
}
else if( direction.Equals( -Vec3.YAxis, .01f ) )
{
points[ 0 ] = new Vec3( -1, -1, -1 );
points[ 1 ] = new Vec3( -1, -1, 1 );
points[ 2 ] = new Vec3( 1, -1, 1 );
points[ 3 ] = new Vec3( 1, -1, -1 );
clipPlanes[ 4 ] = new Plane( direction, -( light.Position.Y - attenuationRange ) );
}
else if( direction.Equals( Vec3.ZAxis, .01f ) )
{
points[ 0 ] = new Vec3( -1, 1, 1 );
points[ 1 ] = new Vec3( 1, 1, 1 );
points[ 2 ] = new Vec3( 1, -1, 1 );
points[ 3 ] = new Vec3( -1, -1, 1 );
clipPlanes[ 4 ] = new Plane( direction, light.Position.Z + attenuationRange );
}
else if( direction.Equals( -Vec3.ZAxis, .01f ) )
{
points[ 0 ] = new Vec3( -1, -1, -1 );
points[ 1 ] = new Vec3( 1, -1, -1 );
points[ 2 ] = new Vec3( 1, 1, -1 );
points[ 3 ] = new Vec3( -1, 1, -1 );
clipPlanes[ 4 ] = new Plane( direction, -( light.Position.Z - attenuationRange ) );
}
else
{
Log.Fatal( "MyRenderingLowLevelMethods: GetClipPlanesForPointLightShadowGeneration: Internal error." );
}
for( int n = 0; n < 4; n++ )
{
clipPlanes[ n ] = Plane.FromPoints( light.Position,
light.Position + points[ n ], light.Position + points[ ( n + 1 ) % 4 ] );
}
return clipPlanes;
}
public override void OnGetShadowmapCameraSetup( Camera mainCamera, RenderLight light,
int directionalLightPSSMTextureIndex, int pointLightFaceIndex, Camera lightCamera,
ref bool skipThisShadowmap )
{
if( light.Type == RenderLightType.Directional )
{
//Directional light
float orthoWindowSize;
Vec3 lightCameraPosition;
Vec3 lightCameraUp;
Vec3[] cornerPoints;
{
if( SceneManager.Instance.IsShadowTechniquePSSM() )
{
float[] splitDistances = SceneManager.Instance.ShadowDirectionalLightSplitDistances;
float nearSplitDistance = splitDistances[ directionalLightPSSMTextureIndex ];
float farSplitDistance = splitDistances[ directionalLightPSSMTextureIndex + 1 ];
bool lastTextureIndex = directionalLightPSSMTextureIndex ==
SceneManager.Instance.ShadowDirectionalLightSplitTextureCount - 1;
GetDirectionalLightCameraCornerPoints( mainCamera, nearSplitDistance, farSplitDistance,
lastTextureIndex, out cornerPoints );
}
else
{
GetDirectionalLightCameraCornerPoints( mainCamera, mainCamera.NearClipDistance,
SceneManager.Instance.ShadowFarDistance, true, out cornerPoints );
}
}
Vec3 destinationPoint = GetDirectionalLightCameraDestinationPoint( mainCamera, cornerPoints );
lightCameraPosition = destinationPoint - light.Direction * directionalLightExtrusionDistance;
lightCameraUp = Vec3.ZAxis;
if( Math.Abs( Vec3.Dot( lightCameraUp, light.Direction ) ) >= .99f )
lightCameraUp = Vec3.YAxis;
float maxDistance = 0;
{
foreach( Vec3 point in cornerPoints )
{
float distance = ( point - destinationPoint ).Length();
if( distance > maxDistance )
maxDistance = distance;
}
}
orthoWindowSize = maxDistance * 2 * 1.05f;
//fix epsilon error
orthoWindowSize = ( (int)( orthoWindowSize / 5 ) ) * 5 + 5;
//fix jittering
{
Quat lightRotation = Quat.FromDirectionZAxisUp( light.Direction );
//convert world space camera position into light space
Vec3 lightSpacePos = lightRotation.GetInverse() * lightCameraPosition;
//snap to nearest texel
float textureSize = SceneManager.Instance.ShadowDirectionalLightTextureSize;
float worldTexelSize = orthoWindowSize / textureSize;
lightSpacePos.Y -= (float)Math.IEEERemainder( lightSpacePos.Y, worldTexelSize );
lightSpacePos.Z -= (float)Math.IEEERemainder( lightSpacePos.Z, worldTexelSize );
//convert back to world space
lightCameraPosition = lightRotation * lightSpacePos;
}
lightCamera.ProjectionType = ProjectionTypes.Orthographic;
lightCamera.AspectRatio = 1;
lightCamera.OrthoWindowHeight = orthoWindowSize;
lightCamera.NearClipDistance = mainCamera.NearClipDistance;
lightCamera.FarClipDistance = shadowMapFarClipDistance;
lightCamera.Position = lightCameraPosition;
lightCamera.FixedUp = lightCameraUp;
lightCamera.Direction = light.Direction;
}
else if( light.Type == RenderLightType.Spot )
{
//Spot light
Degree fov = new Radian( light.SpotlightOuterAngle * 1.05f ).InDegrees();
if( fov > 179 )
fov = 179;
Vec3 up = Vec3.ZAxis;
if( Math.Abs( Vec3.Dot( up, light.Direction ) ) >= 1.0f )
up = Vec3.YAxis;
lightCamera.ProjectionType = ProjectionTypes.Perspective;
lightCamera.AspectRatio = 1;
lightCamera.Fov = fov;
lightCamera.NearClipDistance = mainCamera.NearClipDistance;
lightCamera.FarClipDistance = shadowMapFarClipDistance;// light.AttenuationFar * 1.05f;
lightCamera.Position = light.Position;
lightCamera.FixedUp = up;
lightCamera.Direction = light.Direction;
}
else
{
//Point light
//you can completely skip specified faces for better performance.
//use "skipThisShadowmap" parameter for this.
//example:
//if( pointLightFaceIndex == 3 )
// skipThisShadowmap = true;
Vec3 dir = Vec3.Zero;
Vec3 up = Vec3.Zero;
switch( pointLightFaceIndex )
{
case 0: dir = -Vec3.YAxis; up = Vec3.ZAxis; break;
case 1: dir = Vec3.YAxis; up = Vec3.ZAxis; break;
case 2: dir = Vec3.ZAxis; up = -Vec3.XAxis; break;
case 3: dir = -Vec3.ZAxis; up = Vec3.XAxis; break;
case 4: dir = Vec3.XAxis; up = Vec3.ZAxis; break;
case 5: dir = -Vec3.XAxis; up = Vec3.ZAxis; break;
}
lightCamera.ProjectionType = ProjectionTypes.Perspective;
lightCamera.AspectRatio = 1;
lightCamera.Fov = 90;
lightCamera.NearClipDistance = mainCamera.NearClipDistance;
lightCamera.FarClipDistance = shadowMapFarClipDistance;// light.AttenuationFar * 1.05f;
lightCamera.Position = light.Position;
lightCamera.FixedUp = up;
lightCamera.Direction = dir;
}
}
static Plane[] GetClipPlanesForDirectionalLightShadowGeneration( Camera camera,
RenderLight light, float farClipDistance)
{
float shadowFarDistance = SceneManager.Instance.ShadowFarDistance;
Frustum cameraFrustum = FrustumUtils.GetFrustumByCamera( camera, farClipDistance );
Vec3 cameraPosition = cameraFrustum.Origin;
Vec3 farCenterPoint;
{
float distance = shadowFarDistance;
//small border
distance *= 1.05f;
//not optimal
distance *= MathFunctions.Sqrt( 2 );
farCenterPoint = cameraPosition + cameraFrustum.Axis.Item0 * distance;
}
Vec3 pyramidCenter = ( cameraPosition + farCenterPoint ) * .5f;
Plane farPlane;
{
Vec3 normal = ( farCenterPoint - cameraPosition ).GetNormalize();
float distance = Vec3.Dot( normal, farCenterPoint );
farPlane = new Plane( normal, distance );
}
Vec3[] farCorners = new Vec3[ 4 ];
{
//4 - top-right far, 5 - top-left far, 6 - bottom-left far, 7 - bottom-right far.
Vec3[] points = camera.GetWorldSpaceCorners();
for( int n = 0; n < 4; n++ )
{
Ray ray = new Ray( cameraPosition, points[ n + 4 ] - cameraPosition );
float scale;
farPlane.RayIntersection( ray, out scale );
farCorners[ n ] = ray.GetPointOnRay( scale );
}
}
Vec3[] pyramidPoints = new Vec3[ 5 ];
{
pyramidPoints[ 0 ] = cameraPosition;
for( int n = 0; n < 4; n++ )
pyramidPoints[ n + 1 ] = farCorners[ n ];
}
Line[] pyramidEdges = new Line[ 8 ];
{
for( int n = 0; n < 4; n++ )
{
pyramidEdges[ n ] = new Line( cameraPosition, farCorners[ n ] );
pyramidEdges[ n + 4 ] = new Line( farCorners[ n ],
farCorners[ ( n + 1 ) % 4 ] );
}
}
List<Plane> clipPlanes = new List<Plane>( 7 );
{
Vec3 lightDirectionOffset = light.Direction * 10000.0f;
//back planes
{
if( farPlane.GetSide( farCenterPoint - lightDirectionOffset ) ==
Plane.Side.Negative )
{
clipPlanes.Add( farPlane );
}
for( int n = 0; n < 4; n++ )
{
Plane plane = Plane.FromPoints( cameraPosition, farCorners[ n ],
farCorners[ ( n + 1 ) % 4 ] );
if( plane.GetSide( cameraPosition - lightDirectionOffset ) ==
Plane.Side.Negative )
{
clipPlanes.Add( farPlane );
}
}
}
//generate edge planes
foreach( Line pyramidEdge in pyramidEdges )
{
Vec3 p1 = pyramidEdge.Start;
Vec3 p2 = pyramidEdge.End;
Vec3 p3 = p1 - lightDirectionOffset;
Plane plane;
{
plane = Plane.FromPoints( p1, p2, p3 );
if( plane.GetSide( pyramidCenter ) == Plane.Side.Positive )
plane = Plane.FromPoints( p2, p1, p3 );
}
bool existsPyramidPointsOnBothSides = false;
{
Plane.Side side = Plane.Side.No;
bool sideInitialized = false;
foreach( Vec3 pyramidPoint in pyramidPoints )
{
if( pyramidPoint.Equals( pyramidEdge.Start, .00001f ) )
continue;
if( pyramidPoint.Equals( pyramidEdge.End, .00001f ) )
continue;
Plane.Side s = plane.GetSide( pyramidPoint );
if( sideInitialized )
{
if( side == Plane.Side.Negative && s == Plane.Side.Positive ||
side == Plane.Side.Positive && s == Plane.Side.Negative )
{
existsPyramidPointsOnBothSides = true;
break;
}
}
else
{
side = s;
sideInitialized = true;
}
}
}
if( existsPyramidPointsOnBothSides )
continue;
clipPlanes.Add( plane );
}
}
return clipPlanes.ToArray();
}
static void WalkSpotLightShadowGeneration( Camera camera, RenderLight light,
Set<SceneNode> outSceneNodes, Set<StaticMeshObject> outStaticMeshObjects)
{
Plane[] clipPlanes = GetClipPlanesForSpotLightShadowGeneration( camera, light );
Sphere clipSphere = new Sphere( light.Position, light.AttenuationRange );
SceneManager.Instance._SceneGraph.GetObjects( clipPlanes,
_SceneObjectGroups.SceneNode | _SceneObjectGroups.StaticMeshObject,
delegate( _ISceneObject sceneObject )
{
//clip by sphere
if( !clipSphere.IsIntersectsBounds( sceneObject._SceneData.Bounds ) )
return;
_SceneObjectGroups objGroups = sceneObject._SceneData.Groups;
//StaticMeshObject
if( ( objGroups & _SceneObjectGroups.StaticMeshObject ) != 0 )
{
StaticMeshObject staticMeshObject = (StaticMeshObject)sceneObject;
if( !staticMeshObject.Visible )
return;
if( !staticMeshObject.CastShadows )
return;
outStaticMeshObjects.Add( staticMeshObject );
return;
}
//SceneNode
if( ( objGroups & _SceneObjectGroups.SceneNode ) != 0 )
{
SceneNode sceneNode = (SceneNode)sceneObject;
if( !sceneNode.Visible )
return;
//if( !x.CastShadows )
//{
// can be optimized
//}
outSceneNodes.Add( sceneNode );
return;
}
Log.Fatal( "InternalSceneManagement: WalkSpotLightShadowGeneration: invalid sceneObject." );
} );
}
static void WalkPointLightShadowGeneration( Camera camera, RenderLight light,
Set<SceneNode> outSceneNodes, Set<StaticMeshObject> outStaticMeshObjects)
{
//not optimal. need consider camera frustum.
float range = light.AttenuationRange;
if( range >= 10000.0f )
range = 10000.0f;
Sphere sphere = new Sphere( light.Position, range );
SceneManager.Instance._SceneGraph.GetObjects( ref sphere,
_SceneObjectGroups.SceneNode | _SceneObjectGroups.StaticMeshObject,
delegate( _ISceneObject sceneObject )
{
_SceneObjectGroups objGroups = sceneObject._SceneData.Groups;
//StaticMeshObject
if( ( objGroups & _SceneObjectGroups.StaticMeshObject ) != 0 )
{
StaticMeshObject staticMeshObject = (StaticMeshObject)sceneObject;
if( !staticMeshObject.Visible )
return;
if( !staticMeshObject.CastShadows )
return;
outStaticMeshObjects.Add( staticMeshObject );
return;
}
//SceneNode
if( ( objGroups & _SceneObjectGroups.SceneNode ) != 0 )
{
SceneNode sceneNode = (SceneNode)sceneObject;
if( !sceneNode.Visible )
return;
//if( !x.CastShadows )
//{
// can be optimized
//}
outSceneNodes.Add( sceneNode );
return;
}
Log.Fatal( "InternalSceneManagement: WalkPointLightShadowGeneration: invalid sceneObject." );
} );
}
static void WalkDirectionalLightShadowGeneration( Camera camera, RenderLight light,
float farClipDistance, Set<SceneNode> outSceneNodes,
Set<StaticMeshObject> outStaticMeshObjects)
{
Plane[] clipPlanes = GetClipPlanesForDirectionalLightShadowGeneration( camera,
light, farClipDistance );
SceneManager.Instance._SceneGraph.GetObjects( clipPlanes,
_SceneObjectGroups.SceneNode | _SceneObjectGroups.StaticMeshObject,
delegate( _ISceneObject sceneObject )
{
_SceneObjectGroups objGroups = sceneObject._SceneData.Groups;
//StaticMeshObject
if( ( objGroups & _SceneObjectGroups.StaticMeshObject ) != 0 )
{
StaticMeshObject staticMeshObject = (StaticMeshObject)sceneObject;
if( !staticMeshObject.Visible )
return;
if( !staticMeshObject.CastShadows )
return;
outStaticMeshObjects.Add( staticMeshObject );
return;
}
//SceneNode
if( ( objGroups & _SceneObjectGroups.SceneNode ) != 0 )
{
SceneNode sceneNode = (SceneNode)sceneObject;
if( !sceneNode.Visible )
return;
//if( !x.CastShadows )
//{
// can be optimized
//}
outSceneNodes.Add( sceneNode );
return;
}
Log.Fatal( "InternalSceneManagement: WalkDirectionalLightShadowGeneration: invalid sceneObject." );
} );
}
static Plane[] GetClipPlanesForSpotLightShadowGeneration( Camera camera, RenderLight light )
{
Quat rotation = Quat.FromDirectionZAxisUp( light.Direction );
Plane[] clipPlanes = new Plane[ 9 ];
//side planes
Plane[] sideClipPlanes = light.GetSpotSideClipPlanes();
for( int n = 0; n < 8; n++ )
clipPlanes[ n ] = sideClipPlanes[ n ];
//far plane
float range = light.AttenuationRange;
if( range > 10000 )
range = 10000;
Vec3 dir1 = rotation * Vec3.YAxis;
Vec3 dir2 = rotation * Vec3.ZAxis;
Vec3 p = light.Position + light.Direction * range;
clipPlanes[ 8 ] = Plane.FromVectors( dir1, dir2, p );
return clipPlanes;
}
//static bool IsIntersects( RenderLight light, Sphere boundingSphere )
//{
// if( light.Type == RenderLightType.Point || light.Type == RenderLightType.Spot )
// {
// //check by bounding sphere
// {
// float range = light.AttenuationFar;
// Sphere lightSphere = new Sphere( light.Position, range );
// if( !lightSphere.IsIntersectsSphere( ref boundingSphere ) )
// return false;
// }
// //check by spot light clip planes
// if( light.Type == RenderLightType.Spot )
// {
// foreach( Plane plane in light.SpotLightClipPlanes )
// {
// if( plane.GetDistance( boundingSphere.Origin ) > boundingSphere.Radius )
// return false;
// }
// }
// }
// return true;
//}
public override void OnSceneManagementGetAffectingLightsForObject( Camera camera,
RenderLight[] affectingLights, StaticMeshObject staticMeshObject )
{
if( tempLightArray.Length != affectingLights.Length )
tempLightArray = new RenderLight[ affectingLights.Length ];
int count = 0;
foreach( RenderLight light in affectingLights )
{
if( light.Type == RenderLightType.Point || light.Type == RenderLightType.Spot )
{
if( !IsIntersects( light, staticMeshObject.Bounds ) )
continue;
}
tempLightArray[ count ] = light;
count++;
}
staticMeshObject.SetAffectingLights( tempLightArray, count );
}
static ConvexPolyhedron MakeConvexPolyhedronForPointLight( RenderLight light )
{
float radius = light.AttenuationFar;
radius /= MathFunctions.Cos( MathFunctions.PI * 2.0f / 32.0f );
Vec3[] vertices;
int[] indices;
GeometryGenerator.GenerateSphere( radius, 8, 8, false, out vertices, out indices );
for( int n = 0; n < vertices.Length; n++ )
vertices[ n ] = light.Position + vertices[ n ];
return new ConvexPolyhedron( vertices, indices, .0001f );
}
public override void OnSceneManagementGetAffectingLightsForObject( Camera camera,
RenderLight[] affectingLights, SceneNode sceneNode )
{
if( tempLightArray.Length != affectingLights.Length )
tempLightArray = new RenderLight[ affectingLights.Length ];
int count = 0;
foreach( RenderLight light in affectingLights )
{
//Sphere boundingSphere = new Sphere( sceneNode.Position, 0 );
//{
// for( int n = 0; n < sceneNode.MovableObjects.Count; n++ )
// {
// MovableObject movableObject = sceneNode.MovableObjects[ n ];
// float radius = movableObject._GetBoundingRadius();
// if( radius > boundingSphere.Radius )
// boundingSphere.Radius = radius;
// }
//}
if( light.Type == RenderLightType.Point || light.Type == RenderLightType.Spot )
{
Bounds bounds;
sceneNode.GetWorldBounds( out bounds );
if( !IsIntersects( light, bounds ) )
continue;
}
tempLightArray[ count ] = light;
count++;
}
sceneNode.SetAffectingLights( tempLightArray, count );
}
static ConvexPolyhedron MakeConvexPolyhedronForSpotLight( RenderLight light )
{
float outerAngle = light.SpotlightOuterAngle;
if( outerAngle < new Degree( 1 ).InRadians() )
outerAngle = new Degree( 1 ).InRadians();
if( outerAngle > new Degree( 179 ).InRadians() )
outerAngle = new Degree( 179 ).InRadians();
List<Vec3> vertices = new List<Vec3>( 10 );
List<ConvexPolyhedron.Face> faces = new List<ConvexPolyhedron.Face>( 16 );
Mat3 worldRotation = Quat.FromDirectionZAxisUp( light.Direction ).ToMat3();
float sideAngle;
{
float radius = MathFunctions.Sin( outerAngle / 2 ) * light.AttenuationFar;
float l = MathFunctions.Sqrt( light.AttenuationFar * light.AttenuationFar - radius * radius );
radius /= MathFunctions.Cos( MathFunctions.PI * 2 / 16 );
sideAngle = MathFunctions.ATan( radius / l );
}
Vec3 farPoint;
{
Mat3 pointRotation = worldRotation * Mat3.FromRotateByY( outerAngle / 4 );
Vec3 direction = pointRotation * Vec3.XAxis;
Vec3 point = light.Position + direction * light.AttenuationFar;
Plane plane = Plane.FromPointAndNormal( point, direction );
Ray ray = new Ray( light.Position, light.Direction * light.AttenuationFar );
float scale;
plane.RayIntersection( ray, out scale );
farPoint = ray.GetPointOnRay( scale * 1.05f );
}
vertices.Add( light.Position );
vertices.Add( farPoint );
for( int nAxisAngle = 0; nAxisAngle < 8; nAxisAngle++ )
{
float axisAngle = ( MathFunctions.PI * 2 ) * ( (float)nAxisAngle / 8 );
Mat3 worldAxisRotation = worldRotation * Mat3.FromRotateByX( axisAngle );
Plane sidePlane;
{
Mat3 sideAngleRotation = Mat3.FromRotateByY( sideAngle + MathFunctions.PI / 2 );
Mat3 pointRotation = worldAxisRotation * sideAngleRotation;
sidePlane = Plane.FromPointAndNormal( light.Position, pointRotation * Vec3.XAxis );
}
{
Mat3 pointRotation = worldAxisRotation * Mat3.FromRotateByY( outerAngle / 4 );
Vec3 direction = pointRotation * Vec3.XAxis;
Vec3 point = light.Position + direction * ( light.AttenuationFar * 1.05f );
Ray ray = new Ray( farPoint, point - farPoint );
float scale;
sidePlane.RayIntersection( ray, out scale );
Vec3 p = ray.GetPointOnRay( scale );
vertices.Add( p );
}
}
for( int n = 0; n < 8; n++ )
{
faces.Add( new ConvexPolyhedron.Face( 0, n + 2, ( n + 1 ) % 8 + 2 ) );
faces.Add( new ConvexPolyhedron.Face( 1, ( n + 1 ) % 8 + 2, n + 2 ) );
}
//foreach( ConvexPolyhedron.Face face in faces )
//{
// camera.DebugGeometry.Color = new ColorValue( 0, 0, 1 );
// Vec3 p0 = vertices[ face.Vertex0 ];
// Vec3 p1 = vertices[ face.Vertex1 ];
// Vec3 p2 = vertices[ face.Vertex2 ];
// camera.DebugGeometry.AddLine( p0, p1 );
// camera.DebugGeometry.AddLine( p1, p2 );
// camera.DebugGeometry.AddLine( p2, p0 );
// Vec3[] v = new Vec3[ 3 ] { p0, p1, p2 };
// int[] i = new int[] { 0, 1, 2 };
// camera.DebugGeometry.Color = new ColorValue( 0, 0, 1, .5f );
// camera.DebugGeometry.AddVertexIndexBuffer( v, i, Mat4.Identity, false, true );
//}
//camera.DebugGeometry.Color = new ColorValue( 1, 0, 0 );
//foreach( Vec3 vertex in vertices )
// camera.DebugGeometry.AddSphere( new Sphere( vertex, .1f ) );
return new ConvexPolyhedron( vertices.ToArray(), faces.ToArray(), .0001f );
}
static Plane[] GetClipPlanesForDirectionalLightShadowGeneration( Camera mainCamera,
RenderLight light, int pssmTextureIndex )
{
Frustum mainFrustum = FrustumUtils.GetFrustumByCamera( mainCamera );
if( EngineDebugSettings.FrustumTest && mainCamera.AllowFrustumTestMode )
{
mainFrustum.HalfWidth *= .5f;
mainFrustum.HalfHeight *= .5f;
}
if( SceneManager.Instance.IsShadowTechniquePSSM() )
{
float[] splitDistances = SceneManager.Instance.ShadowDirectionalLightSplitDistances;
float nearSplitDistance = splitDistances[ pssmTextureIndex ];
float farSplitDistance = splitDistances[ pssmTextureIndex + 1 ];
const float splitPadding = 1;
float splitCount = splitDistances.Length - 1;
if( pssmTextureIndex > 0 )
nearSplitDistance -= splitPadding;
if( pssmTextureIndex < splitCount - 1 )
farSplitDistance += splitPadding;
if( nearSplitDistance < mainCamera.NearClipDistance )
nearSplitDistance = mainCamera.NearClipDistance;
if( farSplitDistance <= nearSplitDistance + .001f )
farSplitDistance = nearSplitDistance + .001f;
mainFrustum.NearDistance = nearSplitDistance;
mainFrustum.MoveFarDistance( farSplitDistance );
}
else
{
if( SceneManager.Instance.ShadowFarDistance > mainFrustum.NearDistance )
mainFrustum.MoveFarDistance( SceneManager.Instance.ShadowFarDistance );
}
List<Plane> clipPlanes = new List<Plane>( 64 );
{
Quat lightRotation = Quat.FromDirectionZAxisUp( light.Direction );
Vec3[] frustumPoints = null;
mainFrustum.ToPoints( ref frustumPoints );
Vec3 frustumCenterPoint;
{
frustumCenterPoint = Vec3.Zero;
foreach( Vec3 point in frustumPoints )
frustumCenterPoint += point;
frustumCenterPoint /= frustumPoints.Length;
}
//calculate frustum points projected to 2d from light direction.
Vec2[] projectedFrustumPoints = new Vec2[ frustumPoints.Length ];
{
//Quat invertFrustumAxis = lightCameraFrustum.Rotation.GetInverse();
Quat lightRotationInv = lightRotation.GetInverse();
Vec3 translate = frustumCenterPoint - light.Direction * 1000;
for( int n = 0; n < frustumPoints.Length; n++ )
{
Vec3 point = frustumPoints[ n ] - translate;
Vec3 localPoint = lightRotationInv * point;
projectedFrustumPoints[ n ] = new Vec2( localPoint.Y, localPoint.Z );
}
}
int[] edges = ConvexPolygon.GetFromPoints( projectedFrustumPoints, .001f );
for( int n = 0; n < edges.Length; n++ )
{
Vec3 point1 = frustumPoints[ edges[ n ] ];
Vec3 point2 = frustumPoints[ edges[ ( n + 1 ) % edges.Length ] ];
Plane plane = Plane.FromVectors( light.Direction,
( point2 - point1 ).GetNormalize(), point1 );
clipPlanes.Add( plane );
}
}
//add main frustum clip planes
{
foreach( Plane plane in mainFrustum.Planes )
{
if( Vec3.Dot( plane.Normal, light.Direction ) < 0 )
continue;
clipPlanes.Add( plane );
}
}
//add directionalLightExtrusionDistance clip plane
{
Quat rot = Quat.FromDirectionZAxisUp( light.Direction );
Vec3 p = mainCamera.Position - light.Direction * directionalLightExtrusionDistance;
Plane plane = Plane.FromVectors( rot * Vec3.ZAxis, rot * Vec3.YAxis, p );
clipPlanes.Add( plane );
}
return clipPlanes.ToArray();
}
public override void Dispose()
{
base.Dispose();
if(mMainLight != null)
mMainLight.Dispose();
if (mBillboardSet != null)
mBillboardSet.Dispose();
mMainLight = null;
mBillboardSet = null;
}
static Plane[] GetClipPlanesOfConvexHullAroundMainCameraAndLightPosition(
Camera mainCamera, RenderLight light )
{
Frustum mainFrustum = FrustumUtils.GetFrustumByCamera( mainCamera );
if( EngineDebugSettings.FrustumTest && mainCamera.AllowFrustumTestMode )
{
mainFrustum.HalfWidth *= .5f;
mainFrustum.HalfHeight *= .5f;
}
if( SceneManager.Instance.ShadowFarDistance > mainFrustum.NearDistance )
mainFrustum.MoveFarDistance( SceneManager.Instance.ShadowFarDistance );
Vec3[] frustumPoints = null;
mainFrustum.ToPoints( ref frustumPoints );
//create convex hull from all camera corner points and light position.
List<Vec3> convexHullVertices = new List<Vec3>();
convexHullVertices.Add( mainFrustum.Origin );
for( int n = 4; n < 8; n++ )
convexHullVertices.Add( frustumPoints[ n ] );
convexHullVertices.Add( light.Position );
Plane[] hullPlanes = ConvexPolyhedron.GetConvexPolyhedronPlanesFromVertices(
convexHullVertices, .0001f );
return hullPlanes;
}
public override LightShadowMapTexture CreateShadowMapTexture(RenderView renderView, RenderLight renderLight, IDirectLight light, int shadowMapSize)
{
var shadowMap = base.CreateShadowMapTexture(renderView, renderLight, light, shadowMapSize);
shadowMap.CascadeCount = ((LightDirectionalShadowMap)light.Shadow).GetCascadeCount();
// Views with orthographic cameras cannot use cascades, we force it to 1 shadow map here.
if (renderView.Projection.M44 == 1.0f)
{
shadowMap.ShadowType &= ~(LightShadowType.CascadeMask);
shadowMap.ShadowType |= LightShadowType.Cascade1;
shadowMap.CascadeCount = (int)LightShadowMapCascadeCount.OneCascade;
}
return(shadowMap);
}
/// <summary>
/// Creates the element in the world. It automatically
/// sets up the mesh and the node.</summary>
protected virtual void Initialise(RenderQueueGroupID renderGroup, string materialName, Vec3 scale)
{
mBillboardSet = SceneManager.Instance.CreateBillboardSet(2);
mBillboardSet.CastShadows = false;
mBillboardSet.RenderQueueGroup = renderGroup;
mBillboardSet.MaterialName = materialName;
mBillboardSet.DefaultSize = new Vec2(1, 1);
// Attaches the mesh on a node
if (mBillboardSet.ParentSceneNode == null)
{
mNode = new SceneNode();
mNode.Attach(mBillboardSet);
}
else
mNode = mBillboardSet.ParentSceneNode;
// Sets up the node (Position, Scale and Rotation)
mBillboardSet.CreateBillboard(Vec3.Zero);
mNode.Position = Vec3.Zero;
mNode.Scale = scale;
mMainLight = SceneManager.Instance.CreateLight();
mMainLight.Type = RenderLightType.Directional;
mMainLight.AllowStaticLighting = false;
mMainLight.CastShadows = true;
mMainLight.Position = new Vec3(0, 0, 150);
}
public bool Update(RenderLight light)
{
return(true);
}
public override LightShadowMapTexture CreateShadowMapTexture(RenderView renderView, RenderLight renderLight, IDirectLight light, int shadowMapSize)
{
var shadowMapTexture = base.CreateShadowMapTexture(renderView, renderLight, light, shadowMapSize);
shadowMapTexture.CascadeCount = 6; // 6 faces
return(shadowMapTexture);
}
static void WalkDirectionalLightShadowGeneration( Camera mainCamera, RenderLight light,
int pssmTextureIndex, List<SceneNode> outSceneNodes, List<StaticMeshObject> outStaticMeshObjects )
{
int[] sceneGraphIndexes;
if( SceneManager.Instance.OverrideVisibleObjects != null )
{
sceneGraphIndexes = GetOverrideVisibleObjectsSceneGraphIndexes();
}
else
{
Plane[] clipPlanes = GetClipPlanesForDirectionalLightShadowGeneration( mainCamera, light, pssmTextureIndex );
uint groupMask = 0;
if( outSceneNodes != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.SceneNode;
if( outStaticMeshObjects != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.StaticMeshObject;
sceneGraphIndexes = SceneManager.Instance.SceneGraph.GetObjects( clipPlanes, groupMask );
}
foreach( int sceneGraphIndex in sceneGraphIndexes )
{
SceneManager.SceneGraphObjectData data = SceneManager.Instance.SceneGraphObjects[ sceneGraphIndex ];
//SceneNode
SceneNode sceneNode = data.SceneNode;
if( sceneNode != null && sceneNode.Visible && sceneNode.IsContainsObjectWithCastsShadowsEnabled() )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( sceneNode.GetWorldBounds() ) )
outSceneNodes.Add( sceneNode );
}
//StaticMeshObject
StaticMeshObject staticMeshObject = data.StaticMeshObject;
if( staticMeshObject != null && staticMeshObject.Visible && staticMeshObject.CastShadows )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( staticMeshObject.Bounds ) )
outStaticMeshObjects.Add( staticMeshObject );
}
}
}
static void WalkPointLightShadowGeneration( Camera mainCamera, RenderLight light,
Vec3 pointLightFaceDirection, List<SceneNode> outSceneNodes,
List<StaticMeshObject> outStaticMeshObjects )
{
Sphere lightSphere = new Sphere( light.Position, light.AttenuationFar );
if( !pointLightFaceDirection.Equals( Vec3.Zero, .001f ) )
{
//shadowmap. 6 render targets.
int[] sceneGraphIndexes;
if( SceneManager.Instance.OverrideVisibleObjects != null )
{
sceneGraphIndexes = GetOverrideVisibleObjectsSceneGraphIndexes();
}
else
{
Plane[] clipPlanes;
{
//add point light clip planes
Plane[] array1 = GetClipPlanesForPointLightShadowGeneration( mainCamera, light, pointLightFaceDirection );
//add main frustum clip planes and light position
Plane[] array2 = GetClipPlanesOfConvexHullAroundMainCameraAndLightPosition( mainCamera, light );
clipPlanes = new Plane[ array1.Length + array2.Length ];
Array.Copy( array1, 0, clipPlanes, 0, array1.Length );
Array.Copy( array2, 0, clipPlanes, array1.Length, array2.Length );
}
Bounds clipBounds = lightSphere.ToBounds();
uint groupMask = 0;
if( outSceneNodes != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.SceneNode;
if( outStaticMeshObjects != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.StaticMeshObject;
sceneGraphIndexes = SceneManager.Instance.SceneGraph.GetObjects( clipPlanes, clipBounds, groupMask );
}
foreach( int sceneGraphIndex in sceneGraphIndexes )
{
SceneManager.SceneGraphObjectData data = SceneManager.Instance.SceneGraphObjects[ sceneGraphIndex ];
//SceneNode
SceneNode sceneNode = data.SceneNode;
if( sceneNode != null && sceneNode.Visible && sceneNode.IsContainsObjectWithCastsShadowsEnabled() )
{
Bounds sceneNodeBounds = sceneNode.GetWorldBounds();
//clip by sphere
if( lightSphere.IsIntersectsBounds( sceneNodeBounds ) )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( sceneNodeBounds ) )
outSceneNodes.Add( sceneNode );
}
}
//StaticMeshObject
StaticMeshObject staticMeshObject = data.StaticMeshObject;
if( staticMeshObject != null && staticMeshObject.Visible && staticMeshObject.CastShadows )
{
//clip by sphere
if( lightSphere.IsIntersectsBounds( staticMeshObject.Bounds ) )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( staticMeshObject.Bounds ) )
outStaticMeshObjects.Add( staticMeshObject );
}
}
}
}
else
{
//stencil shadows.
//check by sphere volume.
int[] sceneGraphIndexes;
if( SceneManager.Instance.OverrideVisibleObjects != null )
{
sceneGraphIndexes = GetOverrideVisibleObjectsSceneGraphIndexes();
}
else
{
Plane[] clipPlanes;
{
//add main frustum clip planes and light position
Plane[] array1 = GetClipPlanesOfConvexHullAroundMainCameraAndLightPosition( mainCamera, light );
clipPlanes = new Plane[ 6 + array1.Length ];
//add 6 light clip planes.
clipPlanes[ 0 ] = new Plane( Vec3.XAxis, lightSphere.Origin.X + lightSphere.Radius );
clipPlanes[ 1 ] = new Plane( -Vec3.XAxis, -( lightSphere.Origin.X - lightSphere.Radius ) );
clipPlanes[ 2 ] = new Plane( Vec3.YAxis, lightSphere.Origin.Y + lightSphere.Radius );
clipPlanes[ 3 ] = new Plane( -Vec3.YAxis, -( lightSphere.Origin.Y - lightSphere.Radius ) );
clipPlanes[ 4 ] = new Plane( Vec3.ZAxis, lightSphere.Origin.Z + lightSphere.Radius );
clipPlanes[ 5 ] = new Plane( -Vec3.ZAxis, -( lightSphere.Origin.Z - lightSphere.Radius ) );
Array.Copy( array1, 0, clipPlanes, 6, array1.Length );
}
Bounds clipBounds = lightSphere.ToBounds();
uint groupMask = 0;
if( outSceneNodes != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.SceneNode;
if( outStaticMeshObjects != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.StaticMeshObject;
sceneGraphIndexes = SceneManager.Instance.SceneGraph.GetObjects( clipPlanes, clipBounds, groupMask );
}
foreach( int sceneGraphIndex in sceneGraphIndexes )
{
SceneManager.SceneGraphObjectData data = SceneManager.Instance.SceneGraphObjects[ sceneGraphIndex ];
//SceneNode
SceneNode sceneNode = data.SceneNode;
if( sceneNode != null && sceneNode.Visible && sceneNode.IsContainsObjectWithCastsShadowsEnabled() )
{
Bounds sceneNodeBounds = sceneNode.GetWorldBounds();
//clip by sphere
if( lightSphere.IsIntersectsBounds( sceneNodeBounds ) )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( sceneNodeBounds ) )
outSceneNodes.Add( sceneNode );
}
}
//StaticMeshObject
StaticMeshObject staticMeshObject = data.StaticMeshObject;
if( staticMeshObject != null && staticMeshObject.Visible && staticMeshObject.CastShadows )
{
//clip by sphere
if( lightSphere.IsIntersectsBounds( staticMeshObject.Bounds ) )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( staticMeshObject.Bounds ) )
outStaticMeshObjects.Add( staticMeshObject );
}
}
}
}
}
static void WalkSpotLightShadowGeneration( Camera mainCamera, RenderLight light,
List<SceneNode> outSceneNodes, List<StaticMeshObject> outStaticMeshObjects )
{
Sphere lightSphere = new Sphere( light.Position, light.AttenuationFar );
int[] sceneGraphIndexes;
if( SceneManager.Instance.OverrideVisibleObjects != null )
{
sceneGraphIndexes = GetOverrideVisibleObjectsSceneGraphIndexes();
}
else
{
Plane[] clipPlanes;
{
//add spot light clip planes
Plane[] array1 = light.SpotLightClipPlanes;
//add main frustum clip planes and light position
Plane[] array2 = GetClipPlanesOfConvexHullAroundMainCameraAndLightPosition( mainCamera, light );
clipPlanes = new Plane[ array1.Length + array2.Length ];
Array.Copy( array1, 0, clipPlanes, 0, array1.Length );
Array.Copy( array2, 0, clipPlanes, array1.Length, array2.Length );
}
Bounds clipBounds = lightSphere.ToBounds();
uint groupMask = 0;
if( outSceneNodes != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.SceneNode;
if( outStaticMeshObjects != null )
groupMask |= 1 << (int)SceneManager.SceneGraphGroups.StaticMeshObject;
sceneGraphIndexes = SceneManager.Instance.SceneGraph.GetObjects( clipPlanes, clipBounds, groupMask );
}
foreach( int sceneGraphIndex in sceneGraphIndexes )
{
SceneManager.SceneGraphObjectData data = SceneManager.Instance.SceneGraphObjects[ sceneGraphIndex ];
//SceneNode
SceneNode sceneNode = data.SceneNode;
if( sceneNode != null && sceneNode.Visible && sceneNode.IsContainsObjectWithCastsShadowsEnabled() )
{
Bounds sceneNodeBounds = sceneNode.GetWorldBounds();
//clip by sphere
if( lightSphere.IsIntersectsBounds( sceneNodeBounds ) )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( sceneNodeBounds ) )
outSceneNodes.Add( sceneNode );
}
}
//StaticMeshObject
StaticMeshObject staticMeshObject = data.StaticMeshObject;
if( staticMeshObject != null && staticMeshObject.Visible && staticMeshObject.CastShadows )
{
//clip by sphere
if( lightSphere.IsIntersectsBounds( staticMeshObject.Bounds ) )
{
//clip volumes
if( !IsTotalClipVolumesContainsBounds( staticMeshObject.Bounds ) )
outStaticMeshObjects.Add( staticMeshObject );
}
}
}
}
public override LightShadowMapTexture CreateShadowMapTexture(RenderView renderView, RenderLight renderLight, IDirectLight light, int shadowMapSize)
{
var shadowMap = shadowMaps.Add();
shadowMap.Initialize(renderView, renderLight, light, light.Shadow, shadowMapSize, this);
shadowMap.CascadeCount = 2; // 2 faces
return(shadowMap);
}
private static bool CanRenderLight(RenderLight renderLight, LightGroupRendererBase.ProcessLightsParameters parameters)
{
// Just to do some minor fake work, but ensure this is true.
return(renderLight.Position == default);
}
