public MyShadowmapQuery GetShadowmapQueryForSingleShadow(int index, IDsvBindable dsvBindable)
{
MyProjectionInfo projInfo = new MyProjectionInfo();
projInfo.WorldCameraOffsetPosition = MyRender11.Environment.Matrices.CameraPosition;
projInfo.WorldToProjection = MatrixWorldAt0ToShadowSpace;
projInfo.LocalToProjection = Matrix.CreateTranslation(MyRender11.Environment.Matrices.CameraPosition) * MatrixWorldAt0ToShadowSpace;
MyShadowmapQuery query = new MyShadowmapQuery();
query.DepthBuffer = dsvBindable;
query.Viewport = new MyViewport(dsvBindable.Size.X, dsvBindable.Size.Y);
query.ProjectionInfo = projInfo;
query.ProjectionFactor = (float)Math.Sqrt(dsvBindable.Size.X * dsvBindable.Size.Y / (m_matrixShadowToWorldAt0Space.Left.Length() * m_matrixShadowToWorldAt0Space.Up.Length()));
query.QueryType = MyFrustumEnum.ShadowProjection;
query.Index = index;
return query;
}
public MyShadowmapQuery GetShadowmapQueryForSingleShadow(int index, IDsvBindable dsvBindable)
{
MyProjectionInfo projInfo = new MyProjectionInfo();
projInfo.WorldCameraOffsetPosition = MyRender11.Environment.Matrices.CameraPosition;
projInfo.WorldToProjection = MatrixWorldAt0ToShadowSpace;
projInfo.LocalToProjection = Matrix.CreateTranslation(MyRender11.Environment.Matrices.CameraPosition) * MatrixWorldAt0ToShadowSpace;
MyShadowmapQuery query = new MyShadowmapQuery();
query.DepthBuffer = dsvBindable;
query.Viewport = new MyViewport(dsvBindable.Size.X, dsvBindable.Size.Y);
query.ProjectionInfo = projInfo;
query.ProjectionFactor = (float)Math.Sqrt(dsvBindable.Size.X * dsvBindable.Size.Y / (m_matrixShadowToWorldAt0Space.Left.Length() * m_matrixShadowToWorldAt0Space.Up.Length()));
query.QueryType = MyFrustumEnum.ShadowProjection;
query.Index = index;
return(query);
}
static void AddShadowmapQueryIntoCullQuery(MyCullQuery cullQuery, MyShadowmapQuery shadowmapQuery)
{
cullQuery.AddDepthPass(shadowmapQuery);
if (shadowmapQuery.QueryType == MyFrustumEnum.ShadowCascade)
{
var smallCulling = new MyCullingSmallObjects
{
ProjectionFactor = shadowmapQuery.ProjectionFactor, // <- this disables culling of objects depending on the previous cascade
SkipThreshold = MyManagers.Shadow.GetSettingsSmallObjectSkipping(shadowmapQuery.Index),
};
cullQuery.FrustumCullQueries[cullQuery.Size - 1].SmallObjects = smallCulling;
}
cullQuery.FrustumCullQueries[cullQuery.Size - 1].Type = shadowmapQuery.QueryType;
cullQuery.FrustumCullQueries[cullQuery.Size - 1].Index = shadowmapQuery.Index;
cullQuery.FrustumCullQueries[cullQuery.Size - 1].Ignored = shadowmapQuery.IgnoredEntities;
}
internal void AddDepthPass(MyShadowmapQuery shadowmapQuery)
{
var worldToProjection = shadowmapQuery.ProjectionInfo.WorldToProjection;
int frustumMask = AddFrustum(ref worldToProjection);
MyDepthPass pass = MyObjectPoolManager.Allocate<MyDepthPass>();
pass.DebugName = MyVisibilityCuller.ToString(shadowmapQuery.QueryType);
pass.ProcessingMask = frustumMask;
pass.ViewProjection = shadowmapQuery.ProjectionInfo.CurrentLocalToProjection;
pass.Viewport = shadowmapQuery.Viewport;
pass.FrustumIndex = shadowmapQuery.Index;
pass.Dsv = shadowmapQuery.DepthBuffer;
bool isCascade = shadowmapQuery.QueryType == MyFrustumEnum.ShadowCascade;
pass.IsCascade = isCascade;
pass.DefaultRasterizer = isCascade
? MyRasterizerStateManager.CascadesRasterizerStateOld
: MyRasterizerStateManager.ShadowRasterizerState;
pass.PerFrame();
RenderingPasses[Size - 1] = pass;
}
/// <summary>
/// Creates shadowmap queries and appends them to the provided list
/// </summary>
internal unsafe void PrepareQueries(List<MyShadowmapQuery> appendShadowmapQueries)
{
Debug.Assert(appendShadowmapQueries != null, "Shadowmap query list cannot be null!");
if (!MyRender11.Settings.EnableShadows || !MyRender11.DebugOverrides.Shadows || MyRender11.RenderSettings.ShadowQuality.GetShadowsQuality() == MyShadowsQuality.DISABLED)
return;
MyGpuProfiler.IC_BeginBlock("PrepareCascades");
MyImmediateRC.RC.CopyResource(m_cascadeShadowmapArray, m_cascadeShadowmapBackup);
bool stabilize = true;
const float DirectionDifferenceThreshold = 0.0175f;
float shadowChangeDelayMultiplier = 180;
for (int cascadeIndex = 0; cascadeIndex < m_initializedShadowCascadesCount; ++cascadeIndex)
{
++m_shadowCascadeFramesSinceLightUpdate[cascadeIndex];
if (m_shadowCascadeFramesSinceLightUpdate[cascadeIndex] > cascadeIndex * shadowChangeDelayMultiplier ||
MyRender11.Environment.Data.EnvironmentLight.SunLightDirection.Dot(m_shadowCascadeLightDirections[cascadeIndex]) < (1 - DirectionDifferenceThreshold))
{
m_shadowCascadeLightDirections[cascadeIndex] = MyRender11.Environment.Data.EnvironmentLight.SunLightDirection;
m_shadowCascadeFramesSinceLightUpdate[cascadeIndex] = 0;
}
}
var globalMatrix = CreateGlobalMatrix();
float cascadesNearClip = 1f;
float backOffset = MyRender11.RenderSettings.ShadowQuality.BackOffset();
float shadowmapSize = MyRender11.RenderSettings.ShadowQuality.ShadowCascadeResolution();
for (int cascadeIndex = 0; cascadeIndex < ShadowCascadeSplitDepths.Length; ++cascadeIndex)
ShadowCascadeSplitDepths[cascadeIndex] = MyRender11.RenderSettings.ShadowQuality.ShadowCascadeSplit(cascadeIndex);
double unitWidth = 1.0 / MyRender11.Environment.Matrices.Projection.M11;
double unitHeight = 1.0 / MyRender11.Environment.Matrices.Projection.M22;
Vector3D* untransformedVertices = stackalloc Vector3D[4];
untransformedVertices[0] = new Vector3D(-unitWidth, -unitHeight, -1);
untransformedVertices[1] = new Vector3D(-unitWidth, unitHeight, -1);
untransformedVertices[2] = new Vector3D(unitWidth, unitHeight, -1);
untransformedVertices[3] = new Vector3D(unitWidth, -unitHeight, -1);
MatrixD* cascadesMatrices = stackalloc MatrixD[MaxShadowCascades];
for (int cascadeIndex = 0; cascadeIndex < m_initializedShadowCascadesCount; ++cascadeIndex)
{
for (int vertexIndex = 0; vertexIndex < 4; ++vertexIndex)
{
m_frustumVerticesWS[vertexIndex] = untransformedVertices[vertexIndex] * ShadowCascadeSplitDepths[cascadeIndex];
m_frustumVerticesWS[vertexIndex + 4] = untransformedVertices[vertexIndex] * ShadowCascadeSplitDepths[cascadeIndex + 1];
}
bool skipCascade = MyCommon.FrameCounter % (ulong)m_shadowCascadeUpdateIntervals[cascadeIndex].Item1 != (ulong)m_shadowCascadeUpdateIntervals[cascadeIndex].Item2;
bool forceUpdate = ShadowCascadeSplitDepths[cascadeIndex] > 1000f && Vector3D.DistanceSquared(m_shadowCascadeUpdatePositions[cascadeIndex], MyRender11.Environment.Matrices.CameraPosition) > Math.Pow(1000, 2);
//
if (!forceUpdate && skipCascade && !Settings.Data.UpdateCascadesEveryFrame)
continue;
if (Settings.ShadowCascadeFrozen[cascadeIndex])
continue;
m_shadowCascadeUpdatePositions[cascadeIndex] = MyRender11.Environment.Matrices.CameraPosition;
MatrixD invView = MyRender11.Environment.Matrices.InvView;
Vector3D.Transform(m_frustumVerticesWS, ref invView, m_frustumVerticesWS);
var bSphere = BoundingSphereD.CreateFromPoints(m_frustumVerticesWS);
if (stabilize)
{
bSphere.Center = bSphere.Center.Round();
bSphere.Radius = Math.Ceiling(bSphere.Radius);
}
var shadowCameraPosWS = bSphere.Center + m_shadowCascadeLightDirections[cascadeIndex] * (bSphere.Radius + cascadesNearClip);
var lightView = VRageMath.MatrixD.CreateLookAt(shadowCameraPosWS, shadowCameraPosWS - m_shadowCascadeLightDirections[cascadeIndex], Math.Abs(Vector3.UnitY.Dot(m_shadowCascadeLightDirections[cascadeIndex])) < 0.99f ? Vector3.UnitY : Vector3.UnitX);
var offset = bSphere.Radius + cascadesNearClip + backOffset;
Vector3D vMin = new Vector3D(-bSphere.Radius, -bSphere.Radius, cascadesNearClip);
Vector3D vMax = new Vector3D(bSphere.Radius, bSphere.Radius, offset + bSphere.Radius);
var cascadeProjection = MatrixD.CreateOrthographicOffCenter(vMin.X, vMax.X, vMin.Y, vMax.Y, vMax.Z, vMin.Z);
cascadesMatrices[cascadeIndex] = lightView * cascadeProjection;
var transformed = Vector3D.Transform(Vector3D.Zero, cascadesMatrices[cascadeIndex]) * shadowmapSize / 2;
var smOffset = (transformed.Round() - transformed) * 2 / shadowmapSize;
// stabilize 1st cascade only
if (stabilize)
{
cascadeProjection.M41 += smOffset.X;
cascadeProjection.M42 += smOffset.Y;
cascadesMatrices[cascadeIndex] = lightView * cascadeProjection;
}
var inverseCascadeMatrix = MatrixD.Invert(cascadesMatrices[cascadeIndex]);
var corner0 = Vector3D.Transform(Vector3D.Transform(new Vector3D(-1, -1, 0), inverseCascadeMatrix), globalMatrix);
var corner1 = Vector3D.Transform(Vector3D.Transform(new Vector3D(1, 1, 1), inverseCascadeMatrix), globalMatrix);
var diameter = corner1 - corner0;
var cascadeScale = 1f / diameter;
ShadowCascadeScales[cascadeIndex] = new Vector4D(cascadeScale, 0);
var query = new MyShadowmapQuery();
query.DepthBuffer = m_cascadeShadowmapArray.SubresourceDsv(cascadeIndex);
query.Viewport = new MyViewport(shadowmapSize, shadowmapSize);
m_cascadeInfo[cascadeIndex].WorldCameraOffsetPosition = MyRender11.Environment.Matrices.CameraPosition;
m_cascadeInfo[cascadeIndex].WorldToProjection = cascadesMatrices[cascadeIndex];
// todo: skip translation, recalculate matrix in local space, keep world space matrix only for bounding frustum
m_cascadeInfo[cascadeIndex].LocalToProjection = Matrix.CreateTranslation(MyRender11.Environment.Matrices.CameraPosition) * cascadesMatrices[cascadeIndex];
query.ProjectionInfo = m_cascadeInfo[cascadeIndex];
query.ProjectionDir = m_shadowCascadeLightDirections[cascadeIndex];
query.ProjectionFactor = (float)(shadowmapSize * shadowmapSize / (bSphere.Radius * bSphere.Radius * 4));
query.QueryType = MyFrustumEnum.ShadowCascade;
query.Index = cascadeIndex;
appendShadowmapQueries.Add(query);
}
DebugProcessFrustrums();
FillConstantBuffer(m_csmConstants);
MyGpuProfiler.IC_EndBlock();
}