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Merge branch 'lw/shadow-optimization'

/main
Felipe Lira 7 年前
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1e0a5a30
共有 2 个文件被更改,包括 23 次插入8 次删除
  1. 27
      ScriptableRenderPipeline/LightweightPipeline/LWRP/LightweightPipeline.cs
  2. 4
      ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/Shadows.hlsl

27
ScriptableRenderPipeline/LightweightPipeline/LWRP/LightweightPipeline.cs


private int m_ScreenSpaceShadowMapRTID;
private Matrix4x4[] m_ShadowMatrices = new Matrix4x4[kMaxCascades + 1];
private RenderTargetIdentifier m_CurrCameraColorRT;
private RenderTargetIdentifier m_ShadowMapRT;
private RenderTexture m_ShadowMapRT;
private RenderTargetIdentifier m_ScreenSpaceShadowMapRT;
private RenderTargetIdentifier m_ColorRT;
private RenderTargetIdentifier m_CopyColorRT;

CameraRenderTargetID.depth = Shader.PropertyToID("_CameraDepthTexture");
CameraRenderTargetID.depthCopy = Shader.PropertyToID("_CameraCopyDepthTexture");
m_ShadowMapRT = new RenderTargetIdentifier(m_ShadowMapRTID);
m_ScreenSpaceShadowMapRT = new RenderTargetIdentifier(m_ScreenSpaceShadowMapRTID);
m_ColorRT = new RenderTargetIdentifier(CameraRenderTargetID.color);

if (sceneViewCamera)
CopyTexture(cmd, CameraRenderTargetID.depth, BuiltinRenderTextureType.CameraTarget, m_CopyDepthMaterial, true);
#endif
cmd.ReleaseTemporaryRT(m_ShadowMapRTID);
if (m_ShadowMapRT)
{
cmd.ReleaseTemporaryRT(m_ShadowMapRTID);
m_ShadowMapRT = null;
}
cmd.ReleaseTemporaryRT(m_ScreenSpaceShadowMapRTID);
cmd.ReleaseTemporaryRT(CameraRenderTargetID.depthCopy);
cmd.ReleaseTemporaryRT(CameraRenderTargetID.depth);

private bool ShadowPass(List<VisibleLight> visibleLights, ref ScriptableRenderContext context, ref LightData lightData)
{
m_ShadowMapRT = null;
if (m_Asset.AreShadowsEnabled() && lightData.mainLightIndex != -1)
{
VisibleLight mainLight = visibleLights[lightData.mainLightIndex];

float invShadowResolution = 1.0f / m_Asset.ShadowAtlasResolution;
float invHalfShadowResolution = 0.5f * invShadowResolution;
cmd.Clear();
cmd.SetGlobalTexture(m_ShadowMapRTID, m_ShadowMapRT);
cmd.SetGlobalMatrixArray(ShadowConstantBuffer._WorldToShadow, m_ShadowMatrices);
cmd.SetGlobalVector(ShadowConstantBuffer._ShadowData, new Vector4(light.shadowStrength, 0.0f, 0.0f, 0.0f));
cmd.SetGlobalVectorArray(ShadowConstantBuffer._DirShadowSplitSpheres, m_DirectionalShadowSplitDistances);

bool success = false;
var cmd = CommandBufferPool.Get("Prepare Shadowmap");
cmd.GetTemporaryRT(m_ShadowMapRTID, m_ShadowSettings.shadowAtlasWidth,
m_ShadowSettings.shadowAtlasHeight, kShadowBufferBits, FilterMode.Bilinear, m_ShadowSettings.shadowmapTextureFormat);
RenderTextureDescriptor shadowmapDescriptor = new RenderTextureDescriptor(m_ShadowSettings.shadowAtlasWidth,
m_ShadowSettings.shadowAtlasHeight, m_ShadowSettings.shadowmapTextureFormat, kShadowBufferBits);
shadowmapDescriptor.shadowSamplingMode = ShadowSamplingMode.CompareDepths;
m_ShadowMapRT = RenderTexture.GetTemporary(shadowmapDescriptor);
m_ShadowMapRT.filterMode = FilterMode.Bilinear;
m_ShadowMapRT.wrapMode = TextureWrapMode.Clamp;
// LightweightPipeline.SetRenderTarget is meant to be used with camera targets, not shadowmaps
CoreUtils.SetRenderTarget(cmd, m_ShadowMapRT, ClearFlag.Depth, CoreUtils.ConvertSRGBToActiveColorSpace(m_CurrCamera.backgroundColor));

{
cmd.SetViewport(new Rect(m_ShadowSlices[cascadeIndex].atlasX, m_ShadowSlices[cascadeIndex].atlasY,
m_ShadowSlices[cascadeIndex].shadowResolution, m_ShadowSlices[cascadeIndex].shadowResolution));
cmd.EnableScissorRect(new Rect(m_ShadowSlices[cascadeIndex].atlasX + 4, m_ShadowSlices[cascadeIndex].atlasY + 4,
m_ShadowSlices[cascadeIndex].shadowResolution - 8, m_ShadowSlices[cascadeIndex].shadowResolution - 8));
cmd.Clear();
cmd.DisableScissorRect();
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
}

4
ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/Shadows.hlsl


#define BEYOND_SHADOW_FAR(shadowCoord) shadowCoord.z >= UNITY_RAW_FAR_CLIP_VALUE
#endif
#define OUTSIDE_SHADOW_BOUNDS(shadowCoord) shadowCoord.x <= 0 || shadowCoord.x >= 1 || shadowCoord.y <= 0 || shadowCoord.y >= 1 || BEYOND_SHADOW_FAR(shadowCoord)
half GetShadowStrength()
{
return _ShadowData.x;

#endif
// Shadow coords that fall out of the light frustum volume must always return attenuation 1.0
return (OUTSIDE_SHADOW_BOUNDS(shadowCoord)) ? 1.0 : attenuation;
return BEYOND_SHADOW_FAR(shadowCoord) ? 1.0 : attenuation;
}
inline half ComputeCascadeIndex(float3 positionWS)

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