public static void RenderShadowSlice(CommandBuffer cmd, ref ScriptableRenderContext context,
ref ShadowSliceData shadowSliceData, ref ShadowDrawingSettings settings,
Matrix4x4 proj, Matrix4x4 view)
{
cmd.SetViewport(new Rect(shadowSliceData.offsetX, shadowSliceData.offsetY, shadowSliceData.resolution, shadowSliceData.resolution));
cmd.SetViewProjectionMatrices(view, proj);
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
context.DrawShadows(ref settings);
cmd.DisableScissorRect();
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
}
public static void ApplySliceTransform(ref ShadowSliceData shadowSliceData, int atlasWidth, int atlasHeight)
{
Matrix4x4 sliceTransform = Matrix4x4.identity;
float oneOverAtlasWidth = 1.0f / atlasWidth;
float oneOverAtlasHeight = 1.0f / atlasHeight;
sliceTransform.m00 = shadowSliceData.resolution * oneOverAtlasWidth;
sliceTransform.m11 = shadowSliceData.resolution * oneOverAtlasHeight;
sliceTransform.m03 = shadowSliceData.offsetX * oneOverAtlasWidth;
sliceTransform.m13 = shadowSliceData.offsetY * oneOverAtlasHeight;
// Apply shadow slice scale and offset
shadowSliceData.shadowTransform = sliceTransform * shadowSliceData.shadowTransform;
}
public static void RenderShadowSlice(CommandBuffer cmd, ref ScriptableRenderContext context,
ref ShadowSliceData shadowSliceData, ref ShadowDrawingSettings settings,
Matrix4x4 proj, Matrix4x4 view, Vector4 shadowBias, VisibleLight shadowLight, int cascadeIndex)
{
cmd.SetViewport(new Rect(shadowSliceData.offsetX, shadowSliceData.offsetY, shadowSliceData.resolution, shadowSliceData.resolution));
cmd.EnableScissorRect(new Rect(shadowSliceData.offsetX + 4, shadowSliceData.offsetY + 4, shadowSliceData.resolution - 8, shadowSliceData.resolution - 8));
cmd.SetViewProjectionMatrices(view, proj);
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
context.DrawShadows(ref settings);
CustomRenderShadowSlice?.Invoke(cmd, GL.GetGPUProjectionMatrix(proj, true) * view, shadowBias, shadowLight, cascadeIndex);
cmd.DisableScissorRect();
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
}
public static void RenderShadowSlice(CommandBuffer cmd, ref ScriptableRenderContext context,
ref ShadowSliceData shadowSliceData, ref ShadowDrawingSettings settings,
Matrix4x4 proj, Matrix4x4 view)
{
cmd.SetGlobalDepthBias(1.0f, 2.5f); // these values match HDRP defaults (see https://github.com/Unity-Technologies/Graphics/blob/9544b8ed2f98c62803d285096c91b44e9d8cbc47/com.unity.render-pipelines.high-definition/Runtime/Lighting/Shadow/HDShadowAtlas.cs#L197 )
cmd.SetViewport(new Rect(shadowSliceData.offsetX, shadowSliceData.offsetY, shadowSliceData.resolution, shadowSliceData.resolution));
cmd.SetViewProjectionMatrices(view, proj);
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
context.DrawShadows(ref settings);
cmd.DisableScissorRect();
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
cmd.SetGlobalDepthBias(0.0f, 0.0f); // Restore previous depth bias values
}
public static bool ExtractDirectionalLightMatrix(ref CullingResults cullResults, ref ShadowData shadowData, int shadowLightIndex, int cascadeIndex, int shadowmapWidth, int shadowmapHeight, int shadowResolution, float shadowNearPlane, out Vector4 cascadeSplitDistance, out ShadowSliceData shadowSliceData)
{
bool success = cullResults.ComputeDirectionalShadowMatricesAndCullingPrimitives(shadowLightIndex,
cascadeIndex, shadowData.mainLightShadowCascadesCount, shadowData.mainLightShadowCascadesSplit, shadowResolution, shadowNearPlane, out shadowSliceData.viewMatrix, out shadowSliceData.projectionMatrix,
out shadowSliceData.splitData);
cascadeSplitDistance = shadowSliceData.splitData.cullingSphere;
shadowSliceData.offsetX = (cascadeIndex % 2) * shadowResolution;
shadowSliceData.offsetY = (cascadeIndex / 2) * shadowResolution;
shadowSliceData.resolution = shadowResolution;
shadowSliceData.shadowTransform = GetShadowTransform(shadowSliceData.projectionMatrix, shadowSliceData.viewMatrix);
// If we have shadow cascades baked into the atlas we bake cascade transform
// in each shadow matrix to save shader ALU and L/S
if (shadowData.mainLightShadowCascadesCount > 1)
{
ApplySliceTransform(ref shadowSliceData, shadowmapWidth, shadowmapHeight);
}
return(success);
}
public static bool ExtractDirectionalLightMatrix(ref CullingResults cullResults, ref ShadowData shadowData, int shadowLightIndex, int cascadeIndex, int shadowmapWidth, int shadowmapHeight, int shadowResolution, float shadowNearPlane, out Vector4 cascadeSplitDistance, out ShadowSliceData shadowSliceData, out Matrix4x4 viewMatrix, out Matrix4x4 projMatrix)
{
bool result = ExtractDirectionalLightMatrix(ref cullResults, ref shadowData, shadowLightIndex, cascadeIndex, shadowmapWidth, shadowmapHeight, shadowResolution, shadowNearPlane, out cascadeSplitDistance, out shadowSliceData);
viewMatrix = shadowSliceData.viewMatrix;
projMatrix = shadowSliceData.projectionMatrix;
return(result);
}
public static void RenderShadowSlice(CommandBuffer cmd, ref ScriptableRenderContext context,
ref ShadowSliceData shadowSliceData, ref ShadowDrawingSettings settings)
{
RenderShadowSlice(cmd, ref context, ref shadowSliceData, ref settings,
shadowSliceData.projectionMatrix, shadowSliceData.viewMatrix);
}
void RenderAdditionalShadowmapAtlas(ref ScriptableRenderContext context, ref CullingResults cullResults, ref LightData lightData, ref ShadowData shadowData)
{
NativeArray <VisibleLight> visibleLights = lightData.visibleLights;
bool additionalLightHasSoftShadows = false;
CommandBuffer cmd = CommandBufferPool.Get(m_ProfilerTag);
using (new ProfilingSample(cmd, m_ProfilerTag))
{
bool anyShadowSliceRenderer = false;
int shadowSlicesCount = m_AdditionalShadowCastingLightIndices.Count;
for (int i = 0; i < shadowSlicesCount; ++i)
{
// we do the shadow strength check here again here because when using
// the uniform array path we might have zero strength shadow lights.
// In that case we need the shadow data buffer but we can skip
// rendering them to shadowmap.
if (!m_UseStructuredBuffer && Mathf.Approximately(m_AdditionalLightsShadowParams[i].x, 0.0f))
{
continue;
}
// Index of the VisibleLight
int shadowLightIndex = m_AdditionalShadowCastingLightIndices[i];
VisibleLight shadowLight = visibleLights[shadowLightIndex];
ShadowSliceData shadowSliceData = m_AdditionalLightSlices[i];
var settings = new ShadowDrawingSettings(cullResults, shadowLightIndex);
Vector4 shadowBias = ShadowUtils.GetShadowBias(ref shadowLight, shadowLightIndex,
ref shadowData, shadowSliceData.projectionMatrix, shadowSliceData.resolution);
ShadowUtils.SetupShadowCasterConstantBuffer(cmd, ref shadowLight, shadowBias);
ShadowUtils.RenderShadowSlice(cmd, ref context, ref shadowSliceData, ref settings);
additionalLightHasSoftShadows |= shadowLight.light.shadows == LightShadows.Soft;
anyShadowSliceRenderer = true;
}
// We share soft shadow settings for main light and additional lights to save keywords.
// So we check here if pipeline supports soft shadows and either main light or any additional light has soft shadows
// to enable the keyword.
// TODO: In PC and Consoles we can upload shadow data per light and branch on shader. That will be more likely way faster.
bool mainLightHasSoftShadows = shadowData.supportsMainLightShadows &&
lightData.mainLightIndex != -1 &&
visibleLights[lightData.mainLightIndex].light.shadows ==
LightShadows.Soft;
bool softShadows = shadowData.supportsSoftShadows &&
(mainLightHasSoftShadows || additionalLightHasSoftShadows);
CoreUtils.SetKeyword(cmd, ShaderKeywordStrings.AdditionalLightShadows, anyShadowSliceRenderer);
CoreUtils.SetKeyword(cmd, ShaderKeywordStrings.SoftShadows, softShadows);
if (anyShadowSliceRenderer)
{
SetupAdditionalLightsShadowReceiverConstants(cmd, ref shadowData, softShadows);
}
}
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
public static void RenderShadowSlice(CommandBuffer cmd, ref ScriptableRenderContext context,
ref ShadowSliceData shadowSliceData, ref ShadowDrawingSettings settings, Vector4 shadowBias, VisibleLight shadowLight, int cascadeIndex)
{
RenderShadowSlice(cmd, ref context, ref shadowSliceData, ref settings,
shadowSliceData.projectionMatrix, shadowSliceData.viewMatrix, shadowBias, shadowLight, cascadeIndex);
}
