您最多选择25个主题
主题必须以中文或者字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
1210 行
60 KiB
1210 行
60 KiB
using System;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics;
|
|
using UnityEngine.Rendering;
|
|
using UnityEngine.Rendering.PostProcessing;
|
|
using UnityEngine.XR;
|
|
|
|
namespace UnityEngine.Experimental.Rendering.LightweightPipeline
|
|
{
|
|
[Serializable]
|
|
public class ShadowSettings
|
|
{
|
|
public bool enabled;
|
|
public int shadowAtlasWidth;
|
|
public int shadowAtlasHeight;
|
|
|
|
public float maxShadowDistance;
|
|
public int directionalLightCascadeCount;
|
|
public Vector3 directionalLightCascades;
|
|
public float directionalLightNearPlaneOffset;
|
|
|
|
static ShadowSettings defaultShadowSettings = null;
|
|
|
|
public static ShadowSettings Default
|
|
{
|
|
get
|
|
{
|
|
if (defaultShadowSettings == null)
|
|
{
|
|
defaultShadowSettings = new ShadowSettings();
|
|
defaultShadowSettings.enabled = true;
|
|
defaultShadowSettings.shadowAtlasHeight = defaultShadowSettings.shadowAtlasWidth = 4096;
|
|
defaultShadowSettings.directionalLightCascadeCount = 1;
|
|
defaultShadowSettings.directionalLightCascades = new Vector3(0.05F, 0.2F, 0.3F);
|
|
defaultShadowSettings.directionalLightCascadeCount = 4;
|
|
defaultShadowSettings.directionalLightNearPlaneOffset = 5;
|
|
defaultShadowSettings.maxShadowDistance = 1000.0F;
|
|
}
|
|
return defaultShadowSettings;
|
|
}
|
|
}
|
|
}
|
|
|
|
public struct ShadowSliceData
|
|
{
|
|
public Matrix4x4 shadowTransform;
|
|
public int atlasX;
|
|
public int atlasY;
|
|
public int shadowResolution;
|
|
}
|
|
|
|
public struct LightData
|
|
{
|
|
public int pixelAdditionalLightsCount;
|
|
public int totalAdditionalLightsCount;
|
|
public int mainLightIndex;
|
|
public bool shadowsRendered;
|
|
}
|
|
|
|
public enum MixedLightingSetup
|
|
{
|
|
None = 0,
|
|
ShadowMask,
|
|
Subtractive,
|
|
};
|
|
|
|
public static class CameraRenderTargetID
|
|
{
|
|
// Camera color target. Not used when camera is rendering to backbuffer or camera
|
|
// is rendering to a texture (offscreen camera)
|
|
public static int color;
|
|
|
|
// Camera copy color texture. In case there is a single BeforeTransparent postFX
|
|
// we need use copyColor RT as a work RT.
|
|
public static int copyColor;
|
|
|
|
// Camera depth target. Only used when post processing or soft particles are enabled.
|
|
public static int depth;
|
|
|
|
// If soft particles are enabled and no depth prepass is performed we need to copy depth.
|
|
public static int depthCopy;
|
|
}
|
|
|
|
public class LightweightPipeline : RenderPipeline
|
|
{
|
|
private readonly LightweightPipelineAsset m_Asset;
|
|
|
|
// Maximum amount of visible lights the shader can process. This controls the constant global light buffer size.
|
|
// It must match the MAX_VISIBLE_LIGHTS in LightweightInput.cginc
|
|
private static readonly int kMaxVisibleLights = 16;
|
|
|
|
// Lights are culled per-object. This holds the maximum amount of lights that can be shaded per-object.
|
|
// The engine fills in the lights indices per-object in unity4_LightIndices0 and unity_4LightIndices1
|
|
private static readonly int kMaxPerObjectLights = 8;
|
|
|
|
private static readonly int kMaxVertexLights = 4;
|
|
|
|
private bool m_IsOffscreenCamera;
|
|
|
|
private Vector4[] m_LightPositions = new Vector4[kMaxVisibleLights];
|
|
private Vector4[] m_LightColors = new Vector4[kMaxVisibleLights];
|
|
private Vector4[] m_LightDistanceAttenuations = new Vector4[kMaxVisibleLights];
|
|
private Vector4[] m_LightSpotDirections = new Vector4[kMaxVisibleLights];
|
|
private Vector4[] m_LightSpotAttenuations = new Vector4[kMaxVisibleLights];
|
|
|
|
private Camera m_CurrCamera;
|
|
|
|
private static readonly int kMaxCascades = 4;
|
|
private int m_ShadowCasterCascadesCount = kMaxCascades;
|
|
private int m_ShadowMapRTID;
|
|
private RenderTargetIdentifier m_CurrCameraColorRT;
|
|
private RenderTargetIdentifier m_ShadowMapRT;
|
|
private RenderTargetIdentifier m_ColorRT;
|
|
private RenderTargetIdentifier m_CopyColorRT;
|
|
private RenderTargetIdentifier m_DepthRT;
|
|
private RenderTargetIdentifier m_CopyDepth;
|
|
private RenderTargetIdentifier m_Color;
|
|
|
|
private bool m_IntermediateTextureArray;
|
|
private bool m_RequiredDepth;
|
|
private MixedLightingSetup m_MixedLightingSetup;
|
|
|
|
private const int kShadowDepthBufferBits = 16;
|
|
private const int kCameraDepthBufferBits = 32;
|
|
private Vector4[] m_DirectionalShadowSplitDistances = new Vector4[kMaxCascades];
|
|
|
|
private ShadowSettings m_ShadowSettings = ShadowSettings.Default;
|
|
private ShadowSliceData[] m_ShadowSlices = new ShadowSliceData[kMaxCascades];
|
|
|
|
// Pipeline pass names
|
|
private static readonly ShaderPassName m_DepthPrePass = new ShaderPassName("DepthOnly");
|
|
private static readonly ShaderPassName m_LitPassName = new ShaderPassName("LightweightForward");
|
|
private static readonly ShaderPassName m_UnlitPassName = new ShaderPassName("SRPDefaultUnlit"); // Renders all shaders without a lightmode tag
|
|
|
|
// Legacy pass names
|
|
public static readonly ShaderPassName s_AlwaysName = new ShaderPassName("Always");
|
|
public static readonly ShaderPassName s_ForwardBaseName = new ShaderPassName("ForwardBase");
|
|
public static readonly ShaderPassName s_PrepassBaseName = new ShaderPassName("PrepassBase");
|
|
public static readonly ShaderPassName s_VertexName = new ShaderPassName("Vertex");
|
|
public static readonly ShaderPassName s_VertexLMRGBMName = new ShaderPassName("VertexLMRGBM");
|
|
public static readonly ShaderPassName s_VertexLMName = new ShaderPassName("VertexLM");
|
|
public static readonly ShaderPassName[] s_LegacyPassNames =
|
|
{
|
|
s_AlwaysName, s_ForwardBaseName, s_PrepassBaseName, s_VertexName, s_VertexLMRGBMName, s_VertexLMName
|
|
};
|
|
|
|
private RenderTextureFormat m_ColorFormat;
|
|
private PostProcessRenderContext m_PostProcessRenderContext;
|
|
private PostProcessLayer m_CameraPostProcessLayer;
|
|
|
|
private CameraComparer m_CameraComparer = new CameraComparer();
|
|
private LightComparer m_LightCompararer = new LightComparer();
|
|
|
|
// Maps from sorted light indices to original unsorted. We need this for shadow rendering
|
|
// and per-object light lists.
|
|
private List<int> m_SortedLightIndexMap = new List<int>();
|
|
|
|
private Mesh m_BlitQuad;
|
|
private Material m_BlitMaterial;
|
|
private Material m_CopyDepthMaterial;
|
|
private Material m_ErrorMaterial;
|
|
private int m_BlitTexID = Shader.PropertyToID("_BlitTex");
|
|
|
|
private CopyTextureSupport m_CopyTextureSupport;
|
|
|
|
public LightweightPipeline(LightweightPipelineAsset asset)
|
|
{
|
|
m_Asset = asset;
|
|
|
|
BuildShadowSettings();
|
|
|
|
PerFrameBuffer._GlossyEnvironmentColor = Shader.PropertyToID("_GlossyEnvironmentColor");
|
|
PerFrameBuffer._SubtractiveShadowColor = Shader.PropertyToID("_SubtractiveShadowColor");
|
|
|
|
// Lights are culled per-camera. Therefore we need to reset light buffers on each camera render
|
|
PerCameraBuffer._MainLightPosition = Shader.PropertyToID("_MainLightPosition");
|
|
PerCameraBuffer._MainLightColor = Shader.PropertyToID("_MainLightColor");
|
|
PerCameraBuffer._MainLightDistanceAttenuation = Shader.PropertyToID("_MainLightDistanceAttenuation");
|
|
PerCameraBuffer._MainLightSpotDir = Shader.PropertyToID("_MainLightSpotDir");
|
|
PerCameraBuffer._MainLightSpotAttenuation = Shader.PropertyToID("_MainLightSpotAttenuation");
|
|
PerCameraBuffer._MainLightCookie = Shader.PropertyToID("_MainLightCookie");
|
|
PerCameraBuffer._WorldToLight = Shader.PropertyToID("_WorldToLight");
|
|
PerCameraBuffer._AdditionalLightCount = Shader.PropertyToID("_AdditionalLightCount");
|
|
PerCameraBuffer._AdditionalLightPosition = Shader.PropertyToID("_AdditionalLightPosition");
|
|
PerCameraBuffer._AdditionalLightColor = Shader.PropertyToID("_AdditionalLightColor");
|
|
PerCameraBuffer._AdditionalLightDistanceAttenuation = Shader.PropertyToID("_AdditionalLightDistanceAttenuation");
|
|
PerCameraBuffer._AdditionalLightSpotDir = Shader.PropertyToID("_AdditionalLightSpotDir");
|
|
PerCameraBuffer._AdditionalLightSpotAttenuation = Shader.PropertyToID("_AdditionalLightSpotAttenuation");
|
|
|
|
m_ShadowMapRTID = Shader.PropertyToID("_ShadowMap");
|
|
|
|
CameraRenderTargetID.color = Shader.PropertyToID("_CameraColorRT");
|
|
CameraRenderTargetID.copyColor = Shader.PropertyToID("_CameraCopyColorRT");
|
|
CameraRenderTargetID.depth = Shader.PropertyToID("_CameraDepthTexture");
|
|
CameraRenderTargetID.depthCopy = Shader.PropertyToID("_CameraCopyDepthTexture");
|
|
|
|
m_ShadowMapRT = new RenderTargetIdentifier(m_ShadowMapRTID);
|
|
|
|
m_ColorRT = new RenderTargetIdentifier(CameraRenderTargetID.color);
|
|
m_CopyColorRT = new RenderTargetIdentifier(CameraRenderTargetID.copyColor);
|
|
m_DepthRT = new RenderTargetIdentifier(CameraRenderTargetID.depth);
|
|
m_CopyDepth = new RenderTargetIdentifier(CameraRenderTargetID.depthCopy);
|
|
m_PostProcessRenderContext = new PostProcessRenderContext();
|
|
|
|
m_CopyTextureSupport = SystemInfo.copyTextureSupport;
|
|
|
|
// Let engine know we have MSAA on for cases where we support MSAA backbuffer
|
|
if (QualitySettings.antiAliasing != m_Asset.MSAASampleCount)
|
|
QualitySettings.antiAliasing = m_Asset.MSAASampleCount;
|
|
|
|
Shader.globalRenderPipeline = "LightweightPipeline";
|
|
|
|
m_BlitQuad = LightweightUtils.CreateQuadMesh(false);
|
|
m_BlitMaterial = CoreUtils.CreateEngineMaterial(m_Asset.BlitShader);
|
|
m_CopyDepthMaterial = CoreUtils.CreateEngineMaterial(m_Asset.CopyDepthShader);
|
|
m_ErrorMaterial = CoreUtils.CreateEngineMaterial("Hidden/InternalErrorShader");
|
|
}
|
|
|
|
public override void Dispose()
|
|
{
|
|
base.Dispose();
|
|
Shader.globalRenderPipeline = "";
|
|
|
|
CoreUtils.Destroy(m_ErrorMaterial);
|
|
CoreUtils.Destroy(m_CopyDepthMaterial);
|
|
CoreUtils.Destroy(m_BlitMaterial);
|
|
}
|
|
|
|
CullResults m_CullResults;
|
|
public override void Render(ScriptableRenderContext context, Camera[] cameras)
|
|
{
|
|
base.Render(context, cameras);
|
|
|
|
// TODO: This is at the moment required for all pipes. We should not implicitly change user project settings
|
|
// instead this should be forced when using SRP, since all SRP use linear lighting.
|
|
GraphicsSettings.lightsUseLinearIntensity = true;
|
|
|
|
SetupPerFrameShaderConstants();
|
|
|
|
// Sort cameras array by camera depth
|
|
Array.Sort(cameras, m_CameraComparer);
|
|
foreach (Camera camera in cameras)
|
|
{
|
|
bool sceneViewCamera = camera.cameraType == CameraType.SceneView;
|
|
bool stereoEnabled = XRSettings.isDeviceActive && !sceneViewCamera;
|
|
m_CurrCamera = camera;
|
|
m_IsOffscreenCamera = m_CurrCamera.targetTexture != null && m_CurrCamera.cameraType != CameraType.SceneView;
|
|
|
|
ScriptableCullingParameters cullingParameters;
|
|
if (!CullResults.GetCullingParameters(m_CurrCamera, stereoEnabled, out cullingParameters))
|
|
continue;
|
|
|
|
cullingParameters.shadowDistance = Mathf.Min(m_ShadowSettings.maxShadowDistance,
|
|
m_CurrCamera.farClipPlane);
|
|
|
|
#if UNITY_EDITOR
|
|
// Emit scene view UI
|
|
if (sceneViewCamera)
|
|
ScriptableRenderContext.EmitWorldGeometryForSceneView(camera);
|
|
#endif
|
|
|
|
CullResults.Cull(ref cullingParameters, context, ref m_CullResults);
|
|
VisibleLight[] visibleLights = m_CullResults.visibleLights.ToArray();
|
|
|
|
LightData lightData;
|
|
InitializeLightData(visibleLights, out lightData);
|
|
|
|
ShadowPass(visibleLights, ref context, ref lightData);
|
|
|
|
FrameRenderingConfiguration frameRenderingConfiguration;
|
|
SetupFrameRendering(out frameRenderingConfiguration, stereoEnabled);
|
|
SetupIntermediateResources(frameRenderingConfiguration, ref context);
|
|
|
|
// SetupCameraProperties does the following:
|
|
// Setup Camera RenderTarget and Viewport
|
|
// VR Camera Setup and SINGLE_PASS_STEREO props
|
|
// Setup camera view, proj and their inv matrices.
|
|
// Setup properties: _WorldSpaceCameraPos, _ProjectionParams, _ScreenParams, _ZBufferParams, unity_OrthoParams
|
|
// Setup camera world clip planes props
|
|
// setup HDR keyword
|
|
// Setup global time properties (_Time, _SinTime, _CosTime)
|
|
context.SetupCameraProperties(m_CurrCamera, stereoEnabled);
|
|
|
|
if (LightweightUtils.HasFlag(frameRenderingConfiguration, FrameRenderingConfiguration.DepthPass))
|
|
DepthPass(ref context);
|
|
ForwardPass(visibleLights, frameRenderingConfiguration, ref context, ref lightData, stereoEnabled);
|
|
|
|
// Release temporary RT
|
|
var cmd = CommandBufferPool.Get("After Camera Render");
|
|
cmd.ReleaseTemporaryRT(m_ShadowMapRTID);
|
|
cmd.ReleaseTemporaryRT(CameraRenderTargetID.depthCopy);
|
|
cmd.ReleaseTemporaryRT(CameraRenderTargetID.depth);
|
|
cmd.ReleaseTemporaryRT(CameraRenderTargetID.color);
|
|
cmd.ReleaseTemporaryRT(CameraRenderTargetID.copyColor);
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
|
|
context.Submit();
|
|
}
|
|
}
|
|
|
|
private void ShadowPass(VisibleLight[] visibleLights, ref ScriptableRenderContext context, ref LightData lightData)
|
|
{
|
|
if (m_Asset.AreShadowsEnabled() && lightData.mainLightIndex != -1)
|
|
{
|
|
VisibleLight mainLight = visibleLights[lightData.mainLightIndex];
|
|
|
|
if (mainLight.light.shadows != LightShadows.None)
|
|
{
|
|
if (!LightweightUtils.IsSupportedShadowType(mainLight.lightType))
|
|
{
|
|
Debug.LogWarning("Only directional and spot shadows are supported by LightweightPipeline.");
|
|
return;
|
|
}
|
|
|
|
// There's no way to map shadow light indices. We need to pass in the original unsorted index.
|
|
// If no additional lights then no light sorting is performed and the indices match.
|
|
int shadowOriginalIndex = (lightData.totalAdditionalLightsCount > 0) ? GetLightUnsortedIndex(lightData.mainLightIndex) : lightData.mainLightIndex;
|
|
lightData.shadowsRendered = RenderShadows(ref m_CullResults, ref mainLight,
|
|
shadowOriginalIndex, ref context);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void DepthPass(ref ScriptableRenderContext context)
|
|
{
|
|
CommandBuffer cmd = CommandBufferPool.Get("Depth Prepass");
|
|
SetRenderTarget(cmd, m_DepthRT);
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
|
|
var opaqueDrawSettings = new DrawRendererSettings(m_CurrCamera, m_DepthPrePass);
|
|
opaqueDrawSettings.sorting.flags = SortFlags.CommonOpaque;
|
|
|
|
var opaqueFilterSettings = new FilterRenderersSettings(true)
|
|
{
|
|
renderQueueRange = RenderQueueRange.opaque
|
|
};
|
|
|
|
context.DrawRenderers(m_CullResults.visibleRenderers, ref opaqueDrawSettings, opaqueFilterSettings);
|
|
}
|
|
|
|
private void ForwardPass(VisibleLight[] visibleLights, FrameRenderingConfiguration frameRenderingConfiguration, ref ScriptableRenderContext context, ref LightData lightData, bool stereoEnabled)
|
|
{
|
|
SetupShaderConstants(visibleLights, ref context, ref lightData);
|
|
|
|
RendererConfiguration rendererSettings = GetRendererSettings(ref lightData);
|
|
|
|
BeginForwardRendering(ref context, frameRenderingConfiguration);
|
|
RenderOpaques(ref context, rendererSettings);
|
|
AfterOpaque(ref context, frameRenderingConfiguration);
|
|
RenderTransparents(ref context, rendererSettings);
|
|
AfterTransparent(ref context, frameRenderingConfiguration);
|
|
EndForwardRendering(ref context, frameRenderingConfiguration);
|
|
}
|
|
|
|
private void RenderOpaques(ref ScriptableRenderContext context, RendererConfiguration settings)
|
|
{
|
|
var opaqueDrawSettings = new DrawRendererSettings(m_CurrCamera, m_LitPassName);
|
|
opaqueDrawSettings.SetShaderPassName(1, m_UnlitPassName);
|
|
opaqueDrawSettings.sorting.flags = SortFlags.CommonOpaque;
|
|
opaqueDrawSettings.rendererConfiguration = settings;
|
|
|
|
var opaqueFilterSettings = new FilterRenderersSettings(true)
|
|
{
|
|
renderQueueRange = RenderQueueRange.opaque
|
|
};
|
|
|
|
context.DrawRenderers(m_CullResults.visibleRenderers, ref opaqueDrawSettings, opaqueFilterSettings);
|
|
|
|
// Render objects that did not match any shader pass with error shader
|
|
RenderObjectsWithError(ref context, opaqueFilterSettings, SortFlags.None);
|
|
|
|
if (m_CurrCamera.clearFlags == CameraClearFlags.Skybox)
|
|
context.DrawSkybox(m_CurrCamera);
|
|
}
|
|
|
|
private void AfterOpaque(ref ScriptableRenderContext context, FrameRenderingConfiguration config)
|
|
{
|
|
if (!m_RequiredDepth)
|
|
return;
|
|
|
|
CommandBuffer cmd = CommandBufferPool.Get("After Opaque");
|
|
cmd.SetGlobalTexture(CameraRenderTargetID.depth, m_DepthRT);
|
|
|
|
// When only one opaque effect is active we need to blit to a work RT. We blit to copy color.
|
|
// TODO: We can check if there are more than one opaque postfx and avoid an extra blit.
|
|
// TODO: There's currently an issue in the PostFX stack that has a one frame delay when an effect is enabled/disabled
|
|
// when an effect is disabled, HasOpaqueOnlyEffects returns true in the first frame, however inside render the effect
|
|
// state is update, causing RenderPostProcess here to not blit to FinalColorRT. Until the next frame the RT will have garbage.
|
|
if (LightweightUtils.HasFlag(config, FrameRenderingConfiguration.BeforeTransparentPostProcess))
|
|
{
|
|
RenderPostProcess(cmd, m_ColorRT, m_CopyColorRT, true);
|
|
m_CurrCameraColorRT = (m_IsOffscreenCamera) ? BuiltinRenderTextureType.CameraTarget : m_ColorRT;
|
|
}
|
|
|
|
if (LightweightUtils.HasFlag(config, FrameRenderingConfiguration.DepthCopy))
|
|
{
|
|
RenderTargetIdentifier colorRT = (m_IsOffscreenCamera) ? BuiltinRenderTextureType.CameraTarget : m_ColorRT;
|
|
CopyTexture(cmd, m_DepthRT, m_CopyDepth, m_CopyDepthMaterial);
|
|
SetRenderTarget(cmd, colorRT, m_CopyDepth);
|
|
}
|
|
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
}
|
|
|
|
private void RenderTransparents(ref ScriptableRenderContext context, RendererConfiguration config)
|
|
{
|
|
var transparentSettings = new DrawRendererSettings(m_CurrCamera, m_LitPassName);
|
|
transparentSettings.SetShaderPassName(1, m_UnlitPassName);
|
|
transparentSettings.sorting.flags = SortFlags.CommonTransparent;
|
|
transparentSettings.rendererConfiguration = config;
|
|
|
|
var transparentFilterSettings = new FilterRenderersSettings(true)
|
|
{
|
|
renderQueueRange = RenderQueueRange.transparent
|
|
};
|
|
|
|
context.DrawRenderers(m_CullResults.visibleRenderers, ref transparentSettings, transparentFilterSettings);
|
|
|
|
// Render objects that did not match any shader pass with error shader
|
|
RenderObjectsWithError(ref context, transparentFilterSettings, SortFlags.None);
|
|
}
|
|
|
|
private void AfterTransparent(ref ScriptableRenderContext context, FrameRenderingConfiguration config)
|
|
{
|
|
if (!LightweightUtils.HasFlag(config, FrameRenderingConfiguration.PostProcess))
|
|
return;
|
|
|
|
CommandBuffer cmd = CommandBufferPool.Get("After Transparent");
|
|
RenderPostProcess(cmd, BuiltinRenderTextureType.CurrentActive, BuiltinRenderTextureType.CameraTarget, false);
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
}
|
|
|
|
[Conditional("DEVELOPMENT_BUILD"), Conditional("UNITY_EDITOR")]
|
|
private void RenderObjectsWithError(ref ScriptableRenderContext context, FilterRenderersSettings filterSettings, SortFlags sortFlags)
|
|
{
|
|
if (m_ErrorMaterial != null)
|
|
{
|
|
DrawRendererSettings errorSettings = new DrawRendererSettings(m_CurrCamera, s_LegacyPassNames[0]);
|
|
for (int i = 1; i < s_LegacyPassNames.Length; ++i)
|
|
errorSettings.SetShaderPassName(i, s_LegacyPassNames[i]);
|
|
|
|
errorSettings.sorting.flags = sortFlags;
|
|
errorSettings.rendererConfiguration = RendererConfiguration.None;
|
|
errorSettings.SetOverrideMaterial(m_ErrorMaterial, 0);
|
|
context.DrawRenderers(m_CullResults.visibleRenderers, ref errorSettings, filterSettings);
|
|
}
|
|
}
|
|
|
|
private void BuildShadowSettings()
|
|
{
|
|
m_ShadowSettings = ShadowSettings.Default;
|
|
m_ShadowSettings.directionalLightCascadeCount = m_Asset.CascadeCount;
|
|
|
|
m_ShadowSettings.shadowAtlasWidth = m_Asset.ShadowAtlasResolution;
|
|
m_ShadowSettings.shadowAtlasHeight = m_Asset.ShadowAtlasResolution;
|
|
m_ShadowSettings.maxShadowDistance = m_Asset.ShadowDistance;
|
|
|
|
switch (m_ShadowSettings.directionalLightCascadeCount)
|
|
{
|
|
case 1:
|
|
m_ShadowSettings.directionalLightCascades = new Vector3(1.0f, 0.0f, 0.0f);
|
|
break;
|
|
|
|
case 2:
|
|
m_ShadowSettings.directionalLightCascades = new Vector3(m_Asset.Cascade2Split, 1.0f, 0.0f);
|
|
break;
|
|
|
|
default:
|
|
m_ShadowSettings.directionalLightCascades = m_Asset.Cascade4Split;
|
|
break;
|
|
}
|
|
}
|
|
|
|
private void SetupFrameRendering(out FrameRenderingConfiguration configuration, bool stereoEnabled)
|
|
{
|
|
configuration = (stereoEnabled) ? FrameRenderingConfiguration.Stereo : FrameRenderingConfiguration.None;
|
|
if (stereoEnabled && XRSettings.eyeTextureDesc.dimension == TextureDimension.Tex2DArray)
|
|
m_IntermediateTextureArray = true;
|
|
else
|
|
m_IntermediateTextureArray = false;
|
|
|
|
bool intermediateTexture = m_CurrCamera.targetTexture != null || m_CurrCamera.cameraType == CameraType.SceneView ||
|
|
m_Asset.RenderScale < 1.0f || m_CurrCamera.allowHDR;
|
|
|
|
m_ColorFormat = m_CurrCamera.allowHDR ? RenderTextureFormat.ARGBHalf : RenderTextureFormat.ARGB32;
|
|
m_RequiredDepth = false;
|
|
m_CameraPostProcessLayer = m_CurrCamera.GetComponent<PostProcessLayer>();
|
|
|
|
bool msaaEnabled = m_CurrCamera.allowMSAA && m_Asset.MSAASampleCount > 1 && (m_CurrCamera.targetTexture == null || m_CurrCamera.targetTexture.antiAliasing > 1);
|
|
|
|
// TODO: PostProcessing and SoftParticles are currently not support for VR
|
|
bool postProcessEnabled = m_CameraPostProcessLayer != null && m_CameraPostProcessLayer.enabled && !stereoEnabled;
|
|
bool softParticlesEnabled = m_Asset.RequireCameraDepthTexture && !stereoEnabled;
|
|
if (postProcessEnabled)
|
|
{
|
|
m_RequiredDepth = true;
|
|
intermediateTexture = true;
|
|
|
|
configuration |= FrameRenderingConfiguration.PostProcess;
|
|
|
|
if (m_CameraPostProcessLayer.HasOpaqueOnlyEffects(m_PostProcessRenderContext))
|
|
configuration |= FrameRenderingConfiguration.BeforeTransparentPostProcess;
|
|
|
|
// Resolving depth msaa requires texture2DMS. Currently if msaa is enabled we do a depth pre-pass.
|
|
if (msaaEnabled)
|
|
configuration |= FrameRenderingConfiguration.DepthPass;
|
|
}
|
|
|
|
// In case of soft particles we need depth copy. If depth copy not supported fallback to depth prepass
|
|
if (softParticlesEnabled)
|
|
{
|
|
m_RequiredDepth = true;
|
|
intermediateTexture = true;
|
|
|
|
bool supportsDepthCopy = m_CopyTextureSupport != CopyTextureSupport.None && m_Asset.CopyDepthShader.isSupported;
|
|
|
|
// currently fallback to depth prepass if msaa is enabled since. We need texture2DMS to support depth resolve.
|
|
configuration |= (msaaEnabled || !supportsDepthCopy) ? FrameRenderingConfiguration.DepthPass : FrameRenderingConfiguration.DepthCopy;
|
|
}
|
|
|
|
if (msaaEnabled)
|
|
{
|
|
configuration |= FrameRenderingConfiguration.Msaa;
|
|
intermediateTexture = intermediateTexture || !LightweightUtils.PlatformSupportsMSAABackBuffer();
|
|
}
|
|
|
|
Rect cameraRect = m_CurrCamera.rect;
|
|
if (cameraRect.x > 0.0f || cameraRect.y > 0.0f || cameraRect.width < 1.0f || cameraRect.height < 1.0f)
|
|
intermediateTexture = true;
|
|
else
|
|
configuration |= FrameRenderingConfiguration.DefaultViewport;
|
|
|
|
if (intermediateTexture)
|
|
configuration |= FrameRenderingConfiguration.IntermediateTexture;
|
|
}
|
|
|
|
private void SetupIntermediateResources(FrameRenderingConfiguration renderingConfig, ref ScriptableRenderContext context)
|
|
{
|
|
CommandBuffer cmd = CommandBufferPool.Get("Setup Intermediate Resources");
|
|
|
|
int msaaSamples = (m_IsOffscreenCamera) ? Math.Min(m_CurrCamera.targetTexture.antiAliasing, m_Asset.MSAASampleCount) : m_Asset.MSAASampleCount;
|
|
msaaSamples = (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.Msaa)) ? msaaSamples : 1;
|
|
m_CurrCameraColorRT = BuiltinRenderTextureType.CameraTarget;
|
|
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.IntermediateTexture))
|
|
{
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.Stereo))
|
|
SetupIntermediateResourcesStereo(cmd, msaaSamples);
|
|
else
|
|
SetupIntermediateResourcesSingle(cmd, renderingConfig, msaaSamples);
|
|
}
|
|
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
}
|
|
|
|
private void SetupIntermediateResourcesSingle(CommandBuffer cmd, FrameRenderingConfiguration renderingConfig, int msaaSamples)
|
|
{
|
|
float renderScale = (m_CurrCamera.cameraType == CameraType.Game) ? m_Asset.RenderScale : 1.0f;
|
|
int rtWidth = (int)((float)m_CurrCamera.pixelWidth * renderScale);
|
|
int rtHeight = (int)((float)m_CurrCamera.pixelHeight * renderScale);
|
|
|
|
if (m_RequiredDepth)
|
|
{
|
|
RenderTextureDescriptor depthRTDesc = new RenderTextureDescriptor(rtWidth, rtHeight, RenderTextureFormat.Depth, kCameraDepthBufferBits);
|
|
cmd.GetTemporaryRT(CameraRenderTargetID.depth, depthRTDesc, FilterMode.Bilinear);
|
|
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.DepthCopy))
|
|
cmd.GetTemporaryRT(CameraRenderTargetID.depthCopy, depthRTDesc, FilterMode.Bilinear);
|
|
}
|
|
|
|
RenderTextureDescriptor colorRTDesc = new RenderTextureDescriptor(rtWidth, rtHeight, m_ColorFormat, kCameraDepthBufferBits);
|
|
colorRTDesc.msaaSamples = msaaSamples;
|
|
colorRTDesc.enableRandomWrite = false;
|
|
|
|
// When offscreen camera current rendertarget is CameraTarget
|
|
if (!m_IsOffscreenCamera)
|
|
{
|
|
cmd.GetTemporaryRT(CameraRenderTargetID.color, colorRTDesc, FilterMode.Bilinear);
|
|
m_CurrCameraColorRT = m_ColorRT;
|
|
}
|
|
|
|
// When postprocessing is enabled we might have a before transparent effect. In that case we need to
|
|
// use the camera render target as input. We blit to an opaque RT and then after before postprocessing is done
|
|
// we blit to the final camera RT. If no postprocessing we blit to final camera RT from beginning.
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.BeforeTransparentPostProcess))
|
|
cmd.GetTemporaryRT(CameraRenderTargetID.copyColor, colorRTDesc, FilterMode.Point);
|
|
}
|
|
|
|
private void SetupIntermediateResourcesStereo(CommandBuffer cmd, int msaaSamples)
|
|
{
|
|
RenderTextureDescriptor rtDesc = new RenderTextureDescriptor();
|
|
rtDesc = XRSettings.eyeTextureDesc;
|
|
rtDesc.colorFormat = m_ColorFormat;
|
|
rtDesc.msaaSamples = msaaSamples;
|
|
|
|
cmd.GetTemporaryRT(CameraRenderTargetID.color, rtDesc, FilterMode.Bilinear);
|
|
}
|
|
|
|
private void SetupShaderConstants(VisibleLight[] visibleLights, ref ScriptableRenderContext context, ref LightData lightData)
|
|
{
|
|
CommandBuffer cmd = CommandBufferPool.Get("SetupShaderConstants");
|
|
SetupShaderLightConstants(cmd, visibleLights, ref lightData);
|
|
SetShaderKeywords(cmd, ref lightData, visibleLights);
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
}
|
|
|
|
private void InitializeLightData(VisibleLight[] visibleLights, out LightData lightData)
|
|
{
|
|
int visibleLightsCount = Math.Min(visibleLights.Length, m_Asset.MaxPixelLights);
|
|
m_SortedLightIndexMap.Clear();
|
|
|
|
lightData.shadowsRendered = false;
|
|
|
|
if (visibleLightsCount <= 1)
|
|
lightData.mainLightIndex = GetMainLight(visibleLights);
|
|
else
|
|
lightData.mainLightIndex = SortLights(visibleLights);
|
|
|
|
// If we have a main light we don't shade it in the per-object light loop. We also remove it from the per-object cull list
|
|
int mainLightPresent = (lightData.mainLightIndex >= 0) ? 1 : 0;
|
|
int additionalPixelLightsCount = visibleLightsCount - mainLightPresent;
|
|
int vertexLightCount = (m_Asset.SupportsVertexLight) ? Math.Min(visibleLights.Length, kMaxPerObjectLights) - additionalPixelLightsCount : 0;
|
|
vertexLightCount = Math.Min(vertexLightCount, kMaxVertexLights);
|
|
|
|
lightData.pixelAdditionalLightsCount = additionalPixelLightsCount;
|
|
lightData.totalAdditionalLightsCount = additionalPixelLightsCount + vertexLightCount;
|
|
|
|
m_MixedLightingSetup = MixedLightingSetup.None;
|
|
}
|
|
|
|
private int SortLights(VisibleLight[] visibleLights)
|
|
{
|
|
int totalVisibleLights = visibleLights.Length;
|
|
|
|
Dictionary<int, int> visibleLightsIDMap = new Dictionary<int, int>();
|
|
for (int i = 0; i < totalVisibleLights; ++i)
|
|
visibleLightsIDMap.Add(visibleLights[i].GetHashCode(), i);
|
|
|
|
// Sorts light so we have all directionals first, then local lights.
|
|
// Directionals are sorted further by shadow, cookie and intensity
|
|
// Locals are sorted further by shadow, cookie and distance to camera
|
|
m_LightCompararer.CurrCamera = m_CurrCamera;
|
|
Array.Sort(visibleLights, m_LightCompararer);
|
|
|
|
for (int i = 0; i < totalVisibleLights; ++i)
|
|
m_SortedLightIndexMap.Add(visibleLightsIDMap[visibleLights[i].GetHashCode()]);
|
|
|
|
return GetMainLight(visibleLights);
|
|
}
|
|
|
|
// How main light is decided:
|
|
// If shadows enabled, main light is always a shadow casting light. Directional has priority over local lights.
|
|
// Otherwise directional lights have priority based on cookie support and intensity
|
|
private int GetMainLight(VisibleLight[] visibleLights)
|
|
{
|
|
int totalVisibleLights = visibleLights.Length;
|
|
bool shadowsEnabled = m_Asset.AreShadowsEnabled();
|
|
|
|
if (totalVisibleLights == 0 || m_Asset.MaxPixelLights == 0)
|
|
return -1;
|
|
|
|
int brighestDirectionalIndex = -1;
|
|
for (int i = 0; i < totalVisibleLights; ++i)
|
|
{
|
|
VisibleLight currLight = visibleLights[i];
|
|
|
|
// Particle system lights have the light property as null. We sort lights so all particles lights
|
|
// come last. Therefore, if first light is particle light then all lights are particle lights.
|
|
// In this case we either have no main light or already found it.
|
|
if (currLight.light == null)
|
|
break;
|
|
|
|
if (shadowsEnabled && currLight.light.shadows != LightShadows.None && LightweightUtils.IsSupportedShadowType(currLight.lightType))
|
|
return i;
|
|
|
|
if (currLight.lightType == LightType.Directional && brighestDirectionalIndex == -1)
|
|
brighestDirectionalIndex = i;
|
|
}
|
|
|
|
return brighestDirectionalIndex;
|
|
}
|
|
|
|
private void InitializeLightConstants(VisibleLight[] lights, int lightIndex, out Vector4 lightPos, out Vector4 lightColor, out Vector4 lightDistanceAttenuation, out Vector4 lightSpotDir,
|
|
out Vector4 lightSpotAttenuation)
|
|
{
|
|
float directContributionNotBaked = 1.0f;
|
|
lightPos = new Vector4(0.0f, 0.0f, 1.0f, 0.0f);
|
|
lightColor = Color.black;
|
|
lightDistanceAttenuation = new Vector4(0.0f, 1.0f, 0.0f, directContributionNotBaked);
|
|
lightSpotDir = new Vector4(0.0f, 0.0f, 1.0f, 0.0f);
|
|
lightSpotAttenuation = new Vector4(0.0f, 1.0f, 0.0f, 0.0f);
|
|
|
|
// When no lights are visible, main light will be set to -1.
|
|
// In this case we initialize it to default values and return
|
|
if (lightIndex < 0)
|
|
return;
|
|
|
|
VisibleLight lightData = lights[lightIndex];
|
|
if (lightData.lightType == LightType.Directional)
|
|
{
|
|
Vector4 dir = -lightData.localToWorld.GetColumn(2);
|
|
lightPos = new Vector4(dir.x, dir.y, dir.z, 0.0f);
|
|
}
|
|
else
|
|
{
|
|
Vector4 pos = lightData.localToWorld.GetColumn(3);
|
|
lightPos = new Vector4(pos.x, pos.y, pos.z, 1.0f);
|
|
}
|
|
|
|
lightColor = lightData.finalColor;
|
|
|
|
// Directional Light attenuation is initialize so distance attenuation always be 1.0
|
|
if (lightData.lightType != LightType.Directional)
|
|
{
|
|
// Light attenuation in lightweight matches the unity vanilla one.
|
|
// attenuation = 1.0 / 1.0 + distanceToLightSqr * quadraticAttenuation
|
|
// then a smooth factor is applied to linearly fade attenuation to light range
|
|
// the attenuation smooth factor starts having effect at 80% of light range
|
|
// smoothFactor = (lightRangeSqr - distanceToLightSqr) / (lightRangeSqr - fadeStartDistanceSqr)
|
|
// We rewrite smoothFactor to be able to pre compute the constant terms below and apply the smooth factor
|
|
// with one MAD instruction
|
|
// smoothFactor = distanceSqr * (1.0 / (fadeDistanceSqr - lightRangeSqr)) + (-lightRangeSqr / (fadeDistanceSqr - lightRangeSqr)
|
|
// distanceSqr * oneOverFadeRangeSqr + lightRangeSqrOverFadeRangeSqr
|
|
float lightRangeSqr = lightData.range * lightData.range;
|
|
float fadeStartDistanceSqr = 0.8f * 0.8f * lightRangeSqr;
|
|
float fadeRangeSqr = (fadeStartDistanceSqr - lightRangeSqr);
|
|
float oneOverFadeRangeSqr = 1.0f / fadeRangeSqr;
|
|
float lightRangeSqrOverFadeRangeSqr = -lightRangeSqr / fadeRangeSqr;
|
|
float quadAtten = 25.0f / lightRangeSqr;
|
|
lightDistanceAttenuation = new Vector4(quadAtten, oneOverFadeRangeSqr, lightRangeSqrOverFadeRangeSqr, directContributionNotBaked);
|
|
}
|
|
|
|
if (lightData.lightType == LightType.Spot)
|
|
{
|
|
Vector4 dir = lightData.localToWorld.GetColumn(2);
|
|
lightSpotDir = new Vector4(-dir.x, -dir.y, -dir.z, 0.0f);
|
|
|
|
// Spot Attenuation with a linear falloff can be defined as
|
|
// (SdotL - cosOuterAngle) / (cosInnerAngle - cosOuterAngle)
|
|
// This can be rewritten as
|
|
// invAngleRange = 1.0 / (cosInnerAngle - cosOuterAngle)
|
|
// SdotL * invAngleRange + (-cosOuterAngle * invAngleRange)
|
|
// If we precompute the terms in a MAD instruction
|
|
float spotAngle = Mathf.Deg2Rad * lightData.spotAngle;
|
|
float cosOuterAngle = Mathf.Cos(spotAngle * 0.5f);
|
|
float cosInneAngle = Mathf.Cos(spotAngle * 0.25f);
|
|
float smoothAngleRange = cosInneAngle - cosOuterAngle;
|
|
if (Mathf.Approximately(smoothAngleRange, 0.0f))
|
|
smoothAngleRange = 1.0f;
|
|
|
|
float invAngleRange = 1.0f / smoothAngleRange;
|
|
float add = -cosOuterAngle * invAngleRange;
|
|
lightSpotAttenuation = new Vector4(invAngleRange, add, 0.0f);
|
|
}
|
|
|
|
Light light = lightData.light;
|
|
if (light.bakingOutput.mixedLightingMode == MixedLightingMode.Subtractive && light.bakingOutput.lightmapBakeType == LightmapBakeType.Mixed)
|
|
{
|
|
// TODO: Add support to shadow mask
|
|
if (m_MixedLightingSetup == MixedLightingSetup.None && lightData.light.shadows != LightShadows.None)
|
|
{
|
|
m_MixedLightingSetup = MixedLightingSetup.Subtractive;
|
|
lightDistanceAttenuation.w = 0.0f;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void SetupPerFrameShaderConstants()
|
|
{
|
|
// When glossy reflections are OFF in the shader we set a constant color to use as indirect specular
|
|
SphericalHarmonicsL2 ambientSH = RenderSettings.ambientProbe;
|
|
Vector4 glossyEnvColor = new Vector4(ambientSH[0, 0], ambientSH[1, 0], ambientSH[2, 0]) * RenderSettings.reflectionIntensity;
|
|
Shader.SetGlobalVector(PerFrameBuffer._GlossyEnvironmentColor, glossyEnvColor);
|
|
|
|
// Used when subtractive mode is selected
|
|
Shader.SetGlobalColor(PerFrameBuffer._SubtractiveShadowColor, RenderSettings.subtractiveShadowColor.linear);
|
|
}
|
|
|
|
private void SetupShaderLightConstants(CommandBuffer cmd, VisibleLight[] lights, ref LightData lightData)
|
|
{
|
|
// Main light has an optimized shader path for main light. This will benefit games that only care about a single light.
|
|
// Lightweight pipeline also supports only a single shadow light, if available it will be the main light.
|
|
SetupMainLightConstants(cmd, lights, lightData.mainLightIndex);
|
|
if (lightData.shadowsRendered)
|
|
SetupShadowShaderConstants(cmd, ref lights[lightData.mainLightIndex], m_ShadowCasterCascadesCount);
|
|
|
|
if (lightData.totalAdditionalLightsCount > 0)
|
|
SetupAdditionalListConstants(cmd, lights, ref lightData);
|
|
}
|
|
|
|
private void SetupMainLightConstants(CommandBuffer cmd, VisibleLight[] lights, int lightIndex)
|
|
{
|
|
Vector4 lightPos, lightColor, lightDistanceAttenuation, lightSpotDir, lightSpotAttenuation;
|
|
InitializeLightConstants(lights, lightIndex, out lightPos, out lightColor, out lightDistanceAttenuation, out lightSpotDir, out lightSpotAttenuation);
|
|
|
|
if (lightIndex >= 0)
|
|
{
|
|
LightType mainLightType = lights[lightIndex].lightType;
|
|
Light mainLight = lights[lightIndex].light;
|
|
|
|
if (LightweightUtils.IsSupportedCookieType(mainLightType) && mainLight.cookie != null)
|
|
{
|
|
Matrix4x4 lightCookieMatrix;
|
|
LightweightUtils.GetLightCookieMatrix(lights[lightIndex], out lightCookieMatrix);
|
|
cmd.SetGlobalTexture(PerCameraBuffer._MainLightCookie, mainLight.cookie);
|
|
cmd.SetGlobalMatrix(PerCameraBuffer._WorldToLight, lightCookieMatrix);
|
|
}
|
|
}
|
|
|
|
cmd.SetGlobalVector(PerCameraBuffer._MainLightPosition, lightPos);
|
|
cmd.SetGlobalColor(PerCameraBuffer._MainLightColor, lightColor);
|
|
cmd.SetGlobalVector(PerCameraBuffer._MainLightDistanceAttenuation, lightDistanceAttenuation);
|
|
cmd.SetGlobalVector(PerCameraBuffer._MainLightSpotDir, lightSpotDir);
|
|
cmd.SetGlobalVector(PerCameraBuffer._MainLightSpotAttenuation, lightSpotAttenuation);
|
|
}
|
|
|
|
private void SetupAdditionalListConstants(CommandBuffer cmd, VisibleLight[] lights, ref LightData lightData)
|
|
{
|
|
int additionalLightIndex = 0;
|
|
|
|
// We need to update per-object light list with the proper map to our global additional light buffer
|
|
// First we initialize all lights in the map to -1 to tell the system to discard main light index and
|
|
// remaining lights in the scene that don't fit the max additional light buffer (kMaxVisibileAdditionalLights)
|
|
int[] perObjectLightIndexMap = m_CullResults.GetLightIndexMap();
|
|
for (int i = 0; i < lights.Length; ++i)
|
|
perObjectLightIndexMap[i] = -1;
|
|
|
|
for (int i = 0; i < lights.Length && additionalLightIndex < kMaxVisibleLights; ++i)
|
|
{
|
|
if (i != lightData.mainLightIndex)
|
|
{
|
|
// The engine performs per-object light culling and initialize 8 light indices into two vec4 constants unity_4LightIndices0 and unity_4LightIndices1.
|
|
// In the shader we iterate over each visible light using the indices provided in these constants to index our global light buffer
|
|
// ex: first light position would be m_LightPosisitions[unity_4LightIndices[0]];
|
|
|
|
// However since we sorted the lights we need to tell the engine how to map the original/unsorted indices to our global buffer
|
|
// We do it by settings the perObjectLightIndexMap to the appropriate additionalLightIndex.
|
|
perObjectLightIndexMap[GetLightUnsortedIndex(i)] = additionalLightIndex;
|
|
InitializeLightConstants(lights, i, out m_LightPositions[additionalLightIndex],
|
|
out m_LightColors[additionalLightIndex],
|
|
out m_LightDistanceAttenuations[additionalLightIndex],
|
|
out m_LightSpotDirections[additionalLightIndex],
|
|
out m_LightSpotAttenuations[additionalLightIndex]);
|
|
additionalLightIndex++;
|
|
}
|
|
}
|
|
m_CullResults.SetLightIndexMap(perObjectLightIndexMap);
|
|
|
|
cmd.SetGlobalVector(PerCameraBuffer._AdditionalLightCount, new Vector4(lightData.pixelAdditionalLightsCount,
|
|
lightData.totalAdditionalLightsCount, 0.0f, 0.0f));
|
|
cmd.SetGlobalVectorArray(PerCameraBuffer._AdditionalLightPosition, m_LightPositions);
|
|
cmd.SetGlobalVectorArray(PerCameraBuffer._AdditionalLightColor, m_LightColors);
|
|
cmd.SetGlobalVectorArray(PerCameraBuffer._AdditionalLightDistanceAttenuation, m_LightDistanceAttenuations);
|
|
cmd.SetGlobalVectorArray(PerCameraBuffer._AdditionalLightSpotDir, m_LightSpotDirections);
|
|
cmd.SetGlobalVectorArray(PerCameraBuffer._AdditionalLightSpotAttenuation, m_LightSpotAttenuations);
|
|
}
|
|
|
|
private void SetupShadowShaderConstants(CommandBuffer cmd, ref VisibleLight shadowLight, int cascadeCount)
|
|
{
|
|
Light light = shadowLight.light;
|
|
float strength = 1.0f - light.shadowStrength;
|
|
float bias = light.shadowBias * 0.1f;
|
|
float normalBias = light.shadowNormalBias;
|
|
float nearPlane = light.shadowNearPlane;
|
|
float shadowResolution = m_ShadowSlices[0].shadowResolution;
|
|
|
|
const int maxShadowCascades = 4;
|
|
Matrix4x4[] shadowMatrices = new Matrix4x4[maxShadowCascades];
|
|
for (int i = 0; i < cascadeCount; ++i)
|
|
shadowMatrices[i] = (cascadeCount >= i) ? m_ShadowSlices[i].shadowTransform : Matrix4x4.identity;
|
|
|
|
// TODO: shadow resolution per cascade in case cascades endup being supported.
|
|
float invShadowResolution = 1.0f / shadowResolution;
|
|
float[] pcfKernel =
|
|
{
|
|
-0.5f * invShadowResolution, 0.5f * invShadowResolution,
|
|
0.5f * invShadowResolution, 0.5f * invShadowResolution,
|
|
-0.5f * invShadowResolution, -0.5f * invShadowResolution,
|
|
0.5f * invShadowResolution, -0.5f * invShadowResolution
|
|
};
|
|
|
|
cmd.SetGlobalMatrixArray("_WorldToShadow", shadowMatrices);
|
|
cmd.SetGlobalVectorArray("_DirShadowSplitSpheres", m_DirectionalShadowSplitDistances);
|
|
cmd.SetGlobalVector("_ShadowData", new Vector4(strength, bias, normalBias, nearPlane));
|
|
cmd.SetGlobalFloatArray("_PCFKernel", pcfKernel);
|
|
}
|
|
|
|
private void SetShaderKeywords(CommandBuffer cmd, ref LightData lightData, VisibleLight[] visibleLights)
|
|
{
|
|
int vertexLightsCount = lightData.totalAdditionalLightsCount - lightData.pixelAdditionalLightsCount;
|
|
CoreUtils.SetKeyword(cmd, "_VERTEX_LIGHTS", vertexLightsCount > 0);
|
|
|
|
int mainLightIndex = lightData.mainLightIndex;
|
|
|
|
CoreUtils.SetKeyword(cmd, "_MAIN_LIGHT_COOKIE", mainLightIndex != -1 && LightweightUtils.IsSupportedCookieType(visibleLights[mainLightIndex].lightType) && visibleLights[mainLightIndex].light.cookie != null);
|
|
CoreUtils.SetKeyword(cmd, "_MAIN_DIRECTIONAL_LIGHT", mainLightIndex == -1 || visibleLights[mainLightIndex].lightType == LightType.Directional);
|
|
CoreUtils.SetKeyword(cmd, "_MAIN_SPOT_LIGHT", mainLightIndex != -1 && visibleLights[mainLightIndex].lightType == LightType.Spot);
|
|
CoreUtils.SetKeyword(cmd, "_ADDITIONAL_LIGHTS", lightData.totalAdditionalLightsCount > 0);
|
|
CoreUtils.SetKeyword(cmd, "_MIXED_LIGHTING_SHADOWMASK", m_MixedLightingSetup == MixedLightingSetup.ShadowMask);
|
|
CoreUtils.SetKeyword(cmd, "_MIXED_LIGHTING_SUBTRACTIVE", m_MixedLightingSetup == MixedLightingSetup.Subtractive);
|
|
|
|
string[] shadowKeywords = new string[] { "_HARD_SHADOWS", "_SOFT_SHADOWS", "_HARD_SHADOWS_CASCADES", "_SOFT_SHADOWS_CASCADES" };
|
|
for (int i = 0; i < shadowKeywords.Length; ++i)
|
|
cmd.DisableShaderKeyword(shadowKeywords[i]);
|
|
|
|
if (m_Asset.AreShadowsEnabled() && lightData.shadowsRendered)
|
|
{
|
|
int keywordIndex = (int)m_Asset.ShadowSetting - 1;
|
|
if (m_Asset.CascadeCount > 1)
|
|
keywordIndex += 2;
|
|
cmd.EnableShaderKeyword(shadowKeywords[keywordIndex]);
|
|
}
|
|
|
|
CoreUtils.SetKeyword(cmd, "SOFTPARTICLES_ON", m_Asset.RequireCameraDepthTexture);
|
|
}
|
|
|
|
private bool RenderShadows(ref CullResults cullResults, ref VisibleLight shadowLight, int shadowLightIndex, ref ScriptableRenderContext context)
|
|
{
|
|
m_ShadowCasterCascadesCount = m_ShadowSettings.directionalLightCascadeCount;
|
|
|
|
if (shadowLight.lightType == LightType.Spot)
|
|
m_ShadowCasterCascadesCount = 1;
|
|
|
|
int shadowResolution = GetMaxTileResolutionInAtlas(m_ShadowSettings.shadowAtlasWidth, m_ShadowSettings.shadowAtlasHeight, m_ShadowCasterCascadesCount);
|
|
|
|
Bounds bounds;
|
|
if (!cullResults.GetShadowCasterBounds(shadowLightIndex, out bounds))
|
|
return false;
|
|
|
|
var cmd = CommandBufferPool.Get();
|
|
cmd.name = "Render packed shadows";
|
|
cmd.GetTemporaryRT(m_ShadowMapRTID, m_ShadowSettings.shadowAtlasWidth,
|
|
m_ShadowSettings.shadowAtlasHeight, kShadowDepthBufferBits, FilterMode.Bilinear, RenderTextureFormat.Depth);
|
|
SetRenderTarget(cmd, m_ShadowMapRT, ClearFlag.All);
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
|
|
float shadowNearPlane = m_Asset.ShadowNearOffset;
|
|
Vector3 splitRatio = m_ShadowSettings.directionalLightCascades;
|
|
|
|
Matrix4x4 view, proj;
|
|
var settings = new DrawShadowsSettings(cullResults, shadowLightIndex);
|
|
bool needRendering = false;
|
|
|
|
if (shadowLight.lightType == LightType.Spot)
|
|
{
|
|
needRendering = cullResults.ComputeSpotShadowMatricesAndCullingPrimitives(shadowLightIndex, out view, out proj,
|
|
out settings.splitData);
|
|
|
|
if (!needRendering)
|
|
return false;
|
|
|
|
SetupShadowSliceTransform(0, shadowResolution, proj, view);
|
|
RenderShadowSlice(ref context, 0, proj, view, settings);
|
|
}
|
|
else if (shadowLight.lightType == LightType.Directional)
|
|
{
|
|
for (int cascadeIdx = 0; cascadeIdx < m_ShadowCasterCascadesCount; ++cascadeIdx)
|
|
{
|
|
needRendering = cullResults.ComputeDirectionalShadowMatricesAndCullingPrimitives(shadowLightIndex,
|
|
cascadeIdx, m_ShadowCasterCascadesCount, splitRatio, shadowResolution, shadowNearPlane, out view, out proj,
|
|
out settings.splitData);
|
|
|
|
m_DirectionalShadowSplitDistances[cascadeIdx] = settings.splitData.cullingSphere;
|
|
m_DirectionalShadowSplitDistances[cascadeIdx].w *= settings.splitData.cullingSphere.w;
|
|
|
|
if (!needRendering)
|
|
return false;
|
|
|
|
SetupShadowSliceTransform(cascadeIdx, shadowResolution, proj, view);
|
|
RenderShadowSlice(ref context, cascadeIdx, proj, view, settings);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Debug.LogWarning("Only spot and directional shadow casters are supported in lightweight pipeline");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private void SetupShadowSliceTransform(int cascadeIndex, int shadowResolution, Matrix4x4 proj, Matrix4x4 view)
|
|
{
|
|
// Assumes MAX_CASCADES = 4
|
|
m_ShadowSlices[cascadeIndex].atlasX = (cascadeIndex % 2) * shadowResolution;
|
|
m_ShadowSlices[cascadeIndex].atlasY = (cascadeIndex / 2) * shadowResolution;
|
|
m_ShadowSlices[cascadeIndex].shadowResolution = shadowResolution;
|
|
m_ShadowSlices[cascadeIndex].shadowTransform = Matrix4x4.identity;
|
|
|
|
var matScaleBias = Matrix4x4.identity;
|
|
matScaleBias.m00 = 0.5f;
|
|
matScaleBias.m11 = 0.5f;
|
|
matScaleBias.m22 = 0.5f;
|
|
matScaleBias.m03 = 0.5f;
|
|
matScaleBias.m23 = 0.5f;
|
|
matScaleBias.m13 = 0.5f;
|
|
|
|
// Later down the pipeline the proj matrix will be scaled to reverse-z in case of DX.
|
|
// We need account for that scale in the shadowTransform.
|
|
if (SystemInfo.usesReversedZBuffer)
|
|
matScaleBias.m22 = -0.5f;
|
|
|
|
var matTile = Matrix4x4.identity;
|
|
matTile.m00 = (float)m_ShadowSlices[cascadeIndex].shadowResolution /
|
|
(float)m_ShadowSettings.shadowAtlasWidth;
|
|
matTile.m11 = (float)m_ShadowSlices[cascadeIndex].shadowResolution /
|
|
(float)m_ShadowSettings.shadowAtlasHeight;
|
|
matTile.m03 = (float)m_ShadowSlices[cascadeIndex].atlasX / (float)m_ShadowSettings.shadowAtlasWidth;
|
|
matTile.m13 = (float)m_ShadowSlices[cascadeIndex].atlasY / (float)m_ShadowSettings.shadowAtlasHeight;
|
|
|
|
m_ShadowSlices[cascadeIndex].shadowTransform = matTile * matScaleBias * proj * view;
|
|
}
|
|
|
|
private void RenderShadowSlice(ref ScriptableRenderContext context, int cascadeIndex,
|
|
Matrix4x4 proj, Matrix4x4 view, DrawShadowsSettings settings)
|
|
{
|
|
var buffer = CommandBufferPool.Get("Prepare Shadowmap Slice");
|
|
buffer.SetViewport(new Rect(m_ShadowSlices[cascadeIndex].atlasX, m_ShadowSlices[cascadeIndex].atlasY,
|
|
m_ShadowSlices[cascadeIndex].shadowResolution, m_ShadowSlices[cascadeIndex].shadowResolution));
|
|
buffer.SetViewProjectionMatrices(view, proj);
|
|
context.ExecuteCommandBuffer(buffer);
|
|
|
|
context.DrawShadows(ref settings);
|
|
CommandBufferPool.Release(buffer);
|
|
}
|
|
|
|
private int GetMaxTileResolutionInAtlas(int atlasWidth, int atlasHeight, int tileCount)
|
|
{
|
|
int resolution = Mathf.Min(atlasWidth, atlasHeight);
|
|
if (tileCount > Mathf.Log(resolution))
|
|
{
|
|
Debug.LogError(
|
|
String.Format(
|
|
"Cannot fit {0} tiles into current shadowmap atlas of size ({1}, {2}). ShadowMap Resolution set to zero.",
|
|
tileCount, atlasWidth, atlasHeight));
|
|
return 0;
|
|
}
|
|
|
|
int currentTileCount = atlasWidth / resolution * atlasHeight / resolution;
|
|
while (currentTileCount < tileCount)
|
|
{
|
|
resolution = resolution >> 1;
|
|
currentTileCount = atlasWidth / resolution * atlasHeight / resolution;
|
|
}
|
|
return resolution;
|
|
}
|
|
|
|
private void BeginForwardRendering(ref ScriptableRenderContext context, FrameRenderingConfiguration renderingConfig)
|
|
{
|
|
RenderTargetIdentifier colorRT = BuiltinRenderTextureType.CameraTarget;
|
|
RenderTargetIdentifier depthRT = BuiltinRenderTextureType.None;
|
|
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.Stereo))
|
|
context.StartMultiEye(m_CurrCamera);
|
|
|
|
CommandBuffer cmd = CommandBufferPool.Get("SetCameraRenderTarget");
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.IntermediateTexture))
|
|
{
|
|
if (!m_IsOffscreenCamera)
|
|
colorRT = m_CurrCameraColorRT;
|
|
|
|
if (m_RequiredDepth && !LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.DepthPass))
|
|
depthRT = m_DepthRT;
|
|
}
|
|
|
|
|
|
if (ForceClear())
|
|
{
|
|
SetRenderTarget(cmd, colorRT, depthRT, ClearFlag.All);
|
|
}
|
|
else
|
|
{
|
|
ClearFlag clearFlag = ClearFlag.None;
|
|
CameraClearFlags cameraClearFlags = m_CurrCamera.clearFlags;
|
|
if (cameraClearFlags != CameraClearFlags.Nothing)
|
|
{
|
|
clearFlag |= ClearFlag.Depth;
|
|
if (cameraClearFlags == CameraClearFlags.Color || cameraClearFlags == CameraClearFlags.Skybox)
|
|
clearFlag |= ClearFlag.Color;
|
|
}
|
|
|
|
SetRenderTarget(cmd, colorRT, depthRT, clearFlag);
|
|
}
|
|
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
}
|
|
|
|
private void EndForwardRendering(ref ScriptableRenderContext context, FrameRenderingConfiguration renderingConfig)
|
|
{
|
|
// No additional rendering needs to be done if this is an off screen rendering camera
|
|
if (m_IsOffscreenCamera)
|
|
return;
|
|
|
|
var cmd = CommandBufferPool.Get("Blit");
|
|
if (m_IntermediateTextureArray)
|
|
{
|
|
SetRenderTarget(cmd, BuiltinRenderTextureType.CameraTarget);
|
|
cmd.Blit(m_CurrCameraColorRT, BuiltinRenderTextureType.CurrentActive);
|
|
}
|
|
else if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.IntermediateTexture))
|
|
{
|
|
// If PostProcessing is enabled, it is already blit to CameraTarget.
|
|
if (!LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.PostProcess))
|
|
Blit(cmd, renderingConfig, BuiltinRenderTextureType.CurrentActive, BuiltinRenderTextureType.CameraTarget);
|
|
}
|
|
|
|
SetRenderTarget(cmd, BuiltinRenderTextureType.CameraTarget);
|
|
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.Stereo))
|
|
{
|
|
context.StopMultiEye(m_CurrCamera);
|
|
context.StereoEndRender(m_CurrCamera);
|
|
}
|
|
}
|
|
|
|
RendererConfiguration GetRendererSettings(ref LightData lightData)
|
|
{
|
|
RendererConfiguration settings = RendererConfiguration.PerObjectReflectionProbes | RendererConfiguration.PerObjectLightmaps | RendererConfiguration.PerObjectLightProbe;
|
|
if (lightData.totalAdditionalLightsCount > 0)
|
|
settings |= RendererConfiguration.PerObjectLightIndices8;
|
|
return settings;
|
|
}
|
|
|
|
private void SetRenderTarget(CommandBuffer cmd, RenderTargetIdentifier colorRT, ClearFlag clearFlag = ClearFlag.None)
|
|
{
|
|
int depthSlice = (m_IntermediateTextureArray) ? -1 : 0;
|
|
CoreUtils.SetRenderTarget(cmd, colorRT, clearFlag, m_CurrCamera.backgroundColor.linear, 0, CubemapFace.Unknown, depthSlice);
|
|
}
|
|
|
|
private void SetRenderTarget(CommandBuffer cmd, RenderTargetIdentifier colorRT, RenderTargetIdentifier depthRT, ClearFlag clearFlag = ClearFlag.None)
|
|
{
|
|
if (depthRT == BuiltinRenderTextureType.None)
|
|
{
|
|
SetRenderTarget(cmd, colorRT, clearFlag);
|
|
return;
|
|
}
|
|
|
|
int depthSlice = (m_IntermediateTextureArray) ? -1 : 0;
|
|
CoreUtils.SetRenderTarget(cmd, colorRT, depthRT, clearFlag, m_CurrCamera.backgroundColor.linear, 0, CubemapFace.Unknown, depthSlice);
|
|
}
|
|
|
|
private void RenderPostProcess(CommandBuffer cmd, RenderTargetIdentifier source, RenderTargetIdentifier dest, bool opaqueOnly)
|
|
{
|
|
m_PostProcessRenderContext.Reset();
|
|
m_PostProcessRenderContext.camera = m_CurrCamera;
|
|
m_PostProcessRenderContext.source = source;
|
|
m_PostProcessRenderContext.sourceFormat = m_ColorFormat;
|
|
m_PostProcessRenderContext.destination = dest;
|
|
m_PostProcessRenderContext.command = cmd;
|
|
m_PostProcessRenderContext.flip = true;
|
|
|
|
if (opaqueOnly)
|
|
{
|
|
m_CameraPostProcessLayer.RenderOpaqueOnly(m_PostProcessRenderContext);
|
|
cmd.Blit(m_CopyColorRT, m_ColorRT);
|
|
}
|
|
else
|
|
m_CameraPostProcessLayer.Render(m_PostProcessRenderContext);
|
|
}
|
|
|
|
private int GetLightUnsortedIndex(int index)
|
|
{
|
|
return (index < m_SortedLightIndexMap.Count) ? m_SortedLightIndexMap[index] : index;
|
|
}
|
|
|
|
private bool ForceClear()
|
|
{
|
|
// Clear RenderTarget to avoid tile initialization on mobile GPUs
|
|
// https://community.arm.com/graphics/b/blog/posts/mali-performance-2-how-to-correctly-handle-framebuffers
|
|
return (Application.platform == RuntimePlatform.Android || Application.platform == RuntimePlatform.IPhonePlayer);
|
|
}
|
|
|
|
private void Blit(CommandBuffer cmd, FrameRenderingConfiguration renderingConfig, RenderTargetIdentifier sourceRT, RenderTargetIdentifier destRT, Material material = null)
|
|
{
|
|
if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.DefaultViewport))
|
|
{
|
|
cmd.Blit(sourceRT, destRT, material);
|
|
}
|
|
else
|
|
{
|
|
if (m_BlitQuad == null)
|
|
m_BlitQuad = LightweightUtils.CreateQuadMesh(false);
|
|
|
|
cmd.SetGlobalTexture(m_BlitTexID, sourceRT);
|
|
SetRenderTarget(cmd, destRT);
|
|
cmd.SetViewport(m_CurrCamera.pixelRect);
|
|
cmd.DrawMesh(m_BlitQuad, Matrix4x4.identity, m_BlitMaterial);
|
|
}
|
|
}
|
|
|
|
private void CopyTexture(CommandBuffer cmd, RenderTargetIdentifier sourceRT, RenderTargetIdentifier destRT, Material copyMaterial)
|
|
{
|
|
if (m_CopyTextureSupport != CopyTextureSupport.None)
|
|
cmd.CopyTexture(sourceRT, destRT);
|
|
else
|
|
cmd.Blit(sourceRT, destRT, copyMaterial);
|
|
}
|
|
}
|
|
}
|