void RenderAdditionalShadowmapAtlas(ref ScriptableRenderContext context, ref CullResults cullResults, ref LightData lightData, ref ShadowData shadowData)
{
List <VisibleLight> visibleLights = lightData.visibleLights;
bool additionalLightHasSoftShadows = false;
CommandBuffer cmd = CommandBufferPool.Get(k_RenderAdditionalLightShadows);
using (new ProfilingSample(cmd, k_RenderAdditionalLightShadows))
{
int shadowmapWidth = shadowData.additionalLightsShadowmapWidth;
int shadowmapHeight = shadowData.additionalLightsShadowmapHeight;
m_AdditionalLightsShadowmapTexture = RenderTexture.GetTemporary(shadowmapWidth, shadowmapHeight,
k_ShadowmapBufferBits, m_AdditionalShadowmapFormat);
m_AdditionalLightsShadowmapTexture.filterMode = FilterMode.Bilinear;
m_AdditionalLightsShadowmapTexture.wrapMode = TextureWrapMode.Clamp;
SetRenderTarget(cmd, m_AdditionalLightsShadowmapTexture, RenderBufferLoadAction.DontCare, RenderBufferStoreAction.Store,
ClearFlag.Depth, Color.black, TextureDimension.Tex2D);
for (int i = 0; i < m_AdditionalShadowCastingLightIndices.Count; ++i)
{
int shadowLightIndex = m_AdditionalShadowCastingLightIndices[i];
VisibleLight shadowLight = visibleLights[shadowLightIndex];
if (m_AdditionalShadowCastingLightIndices.Count > 1)
{
ShadowUtils.ApplySliceTransform(ref m_AdditionalLightSlices[i], shadowmapWidth, shadowmapHeight);
}
var settings = new DrawShadowsSettings(cullResults, shadowLightIndex);
Vector4 shadowBias = ShadowUtils.GetShadowBias(ref shadowLight, shadowLightIndex,
ref shadowData, m_AdditionalLightSlices[i].projectionMatrix, m_AdditionalLightSlices[i].resolution);
ShadowUtils.SetupShadowCasterConstantBuffer(cmd, ref shadowLight, shadowBias);
ShadowUtils.RenderShadowSlice(cmd, ref context, ref m_AdditionalLightSlices[i], ref settings, m_AdditionalLightSlices[i].projectionMatrix, m_AdditionalLightSlices[i].viewMatrix);
additionalLightHasSoftShadows |= shadowLight.light.shadows == LightShadows.Soft;
}
SetupAdditionalLightsShadowReceiverConstants(cmd, ref shadowData);
}
// 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, true);
CoreUtils.SetKeyword(cmd, ShaderKeywordStrings.SoftShadows, softShadows);
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
public bool Setup(RenderTargetHandle destination, ref RenderingData renderingData)
{
Clear();
this.destination = destination;
int shadowLightIndex = renderingData.lightData.mainLightIndex;
if (shadowLightIndex == -1)
{
return(false);
}
VisibleLight shadowLight = renderingData.lightData.visibleLights[shadowLightIndex];
Light light = shadowLight.light;
if (light.shadows == LightShadows.None)
{
return(false);
}
if (shadowLight.lightType != LightType.Directional)
{
Debug.LogWarning("Only directional lights are supported as main light.");
}
Bounds bounds;
if (!renderingData.cullResults.GetShadowCasterBounds(shadowLightIndex, out bounds))
{
return(false);
}
m_ShadowCasterCascadesCount = renderingData.shadowData.mainLightShadowCascadesCount;
int shadowResolution = ShadowUtils.GetMaxTileResolutionInAtlas(renderingData.shadowData.mainLightShadowmapWidth,
renderingData.shadowData.mainLightShadowmapHeight, m_ShadowCasterCascadesCount);
for (int cascadeIndex = 0; cascadeIndex < m_ShadowCasterCascadesCount; ++cascadeIndex)
{
bool success = ShadowUtils.ExtractDirectionalLightMatrix(ref renderingData.cullResults, ref renderingData.shadowData,
shadowLightIndex, cascadeIndex, shadowResolution, light.shadowNearPlane,
out m_CascadeSplitDistances[cascadeIndex], out m_CascadeSlices[cascadeIndex], out m_CascadeSlices[cascadeIndex].viewMatrix, out m_CascadeSlices[cascadeIndex].projectionMatrix);
if (!success)
{
return(false);
}
}
return(true);
}
void RenderMainLightCascadeShadowmap(ref ScriptableRenderContext context, ref CullResults cullResults, ref LightData lightData, ref ShadowData shadowData)
{
int shadowLightIndex = lightData.mainLightIndex;
if (shadowLightIndex == -1)
{
return;
}
VisibleLight shadowLight = lightData.visibleLights[shadowLightIndex];
CommandBuffer cmd = CommandBufferPool.Get(k_RenderMainLightShadowmapTag);
using (new ProfilingSample(cmd, k_RenderMainLightShadowmapTag))
{
var settings = new DrawShadowsSettings(cullResults, shadowLightIndex);
m_MainLightShadowmapTexture = RenderTexture.GetTemporary(shadowData.mainLightShadowmapWidth,
shadowData.mainLightShadowmapHeight, k_ShadowmapBufferBits, m_ShadowmapFormat);
m_MainLightShadowmapTexture.filterMode = FilterMode.Bilinear;
m_MainLightShadowmapTexture.wrapMode = TextureWrapMode.Clamp;
SetRenderTarget(cmd, m_MainLightShadowmapTexture, RenderBufferLoadAction.DontCare,
RenderBufferStoreAction.Store, ClearFlag.Depth, Color.black, TextureDimension.Tex2D);
for (int cascadeIndex = 0; cascadeIndex < m_ShadowCasterCascadesCount; ++cascadeIndex)
{
settings.splitData.cullingSphere = m_CascadeSplitDistances[cascadeIndex];
Vector4 shadowBias = ShadowUtils.GetShadowBias(ref shadowLight, shadowLightIndex, ref shadowData, m_CascadeSlices[cascadeIndex].projectionMatrix, m_CascadeSlices[cascadeIndex].resolution);
ShadowUtils.SetupShadowCasterConstantBuffer(cmd, ref shadowLight, shadowBias);
ShadowUtils.RenderShadowSlice(cmd, ref context, ref m_CascadeSlices[cascadeIndex],
ref settings, m_CascadeSlices[cascadeIndex].projectionMatrix, m_CascadeSlices[cascadeIndex].viewMatrix);
}
SetupMainLightShadowReceiverConstants(cmd, ref shadowData, shadowLight);
}
CoreUtils.SetKeyword(cmd, ShaderKeywordStrings.MainLightShadows, true);
CoreUtils.SetKeyword(cmd, ShaderKeywordStrings.MainLightShadowCascades, shadowData.mainLightShadowCascadesCount > 1);
CoreUtils.SetKeyword(cmd, ShaderKeywordStrings.SoftShadows, shadowLight.light.shadows == LightShadows.Soft && shadowData.supportsSoftShadows);
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
public bool Setup(RenderTargetHandle destination, ref RenderingData renderingData, int maxVisibleAdditinalLights)
{
Clear();
this.destination = destination;
if (m_AdditionalLightShadowMatrices.Length != maxVisibleAdditinalLights)
{
m_AdditionalLightShadowMatrices = new Matrix4x4[maxVisibleAdditinalLights];
m_AdditionalLightSlices = new ShadowSliceData[maxVisibleAdditinalLights];
m_AdditionalLightsShadowStrength = new float[maxVisibleAdditinalLights];
}
m_AdditionalShadowCastingLightIndices.Clear();
Bounds bounds;
List <VisibleLight> visibleLights = renderingData.lightData.visibleLights;
int additionalLightsCount = renderingData.lightData.additionalLightsCount;
for (int i = 0; i < visibleLights.Count && m_AdditionalShadowCastingLightIndices.Count < additionalLightsCount; ++i)
{
if (i == renderingData.lightData.mainLightIndex)
{
continue;
}
VisibleLight shadowLight = visibleLights[i];
Light light = shadowLight.light;
if (shadowLight.lightType == LightType.Spot && light != null && light.shadows != LightShadows.None)
{
if (renderingData.cullResults.GetShadowCasterBounds(i, out bounds))
{
m_AdditionalShadowCastingLightIndices.Add(i);
}
}
}
int shadowCastingLightsCount = m_AdditionalShadowCastingLightIndices.Count;
if (shadowCastingLightsCount == 0)
{
return(false);
}
// TODO: Add support to point light shadows. We make a simplification here that only works
// for spot lights and with max spot shadows per pass.
int atlasWidth = renderingData.shadowData.additionalLightsShadowmapWidth;
int atlasHeight = renderingData.shadowData.additionalLightsShadowmapHeight;
int sliceResolution = ShadowUtils.GetMaxTileResolutionInAtlas(atlasWidth, atlasHeight, shadowCastingLightsCount);
bool anyShadows = false;
int shadowSlicesPerRow = (atlasWidth / sliceResolution);
for (int i = 0; i < shadowCastingLightsCount; ++i)
{
int shadowLightIndex = m_AdditionalShadowCastingLightIndices[i];
VisibleLight shadowLight = visibleLights[shadowLightIndex];
// Currently Only Spot Lights are supported in additional lights
Debug.Assert(shadowLight.lightType == LightType.Spot);
Matrix4x4 shadowTransform;
bool success = ShadowUtils.ExtractSpotLightMatrix(ref renderingData.cullResults, ref renderingData.shadowData,
shadowLightIndex, out shadowTransform, out m_AdditionalLightSlices[i].viewMatrix, out m_AdditionalLightSlices[i].projectionMatrix);
if (success)
{
// TODO: We need to pass bias and scale list to shader to be able to support multiple
// shadow casting additional lights.
m_AdditionalLightSlices[i].offsetX = (i % shadowSlicesPerRow) * sliceResolution;
m_AdditionalLightSlices[i].offsetY = (i / shadowSlicesPerRow) * sliceResolution;
m_AdditionalLightSlices[i].resolution = sliceResolution;
m_AdditionalLightSlices[i].shadowTransform = shadowTransform;
m_AdditionalLightsShadowStrength[i] = shadowLight.light.shadowStrength;
anyShadows = true;
}
else
{
m_AdditionalShadowCastingLightIndices.RemoveAt(i--);
}
}
return(anyShadows);
}