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
272 行
15 KiB
272 行
15 KiB
using System.Collections.Generic;
|
|
using UnityEngine.Experimental.GlobalIllumination;
|
|
using UnityEngine.Rendering;
|
|
|
|
namespace UnityEngine.Experimental.Rendering.LightweightPipeline
|
|
{
|
|
public class SetupLightweightConstanstPass : ScriptableRenderPass
|
|
{
|
|
public static class PerCameraBuffer
|
|
{
|
|
public static int _MainLightPosition;
|
|
public static int _MainLightColor;
|
|
public static int _MainLightCookie;
|
|
public static int _WorldToLight;
|
|
|
|
public static int _AdditionalLightCount;
|
|
public static int _AdditionalLightPosition;
|
|
public static int _AdditionalLightColor;
|
|
public static int _AdditionalLightDistanceAttenuation;
|
|
public static int _AdditionalLightSpotDir;
|
|
public static int _AdditionalLightSpotAttenuation;
|
|
|
|
public static int _LightIndexBuffer;
|
|
|
|
public static int _ScaledScreenParams;
|
|
}
|
|
|
|
MixedLightingSetup m_MixedLightingSetup;
|
|
|
|
Vector4 k_DefaultLightPosition = new Vector4(0.0f, 0.0f, 1.0f, 0.0f);
|
|
Vector4 k_DefaultLightColor = Color.black;
|
|
Vector4 k_DefaultLightAttenuation = new Vector4(0.0f, 1.0f, 0.0f, 1.0f);
|
|
Vector4 k_DefaultLightSpotDirection = new Vector4(0.0f, 0.0f, 1.0f, 0.0f);
|
|
Vector4 k_DefaultLightSpotAttenuation = new Vector4(0.0f, 1.0f, 0.0f, 0.0f);
|
|
|
|
Vector4[] m_LightPositions;
|
|
Vector4[] m_LightColors;
|
|
Vector4[] m_LightDistanceAttenuations;
|
|
Vector4[] m_LightSpotDirections;
|
|
Vector4[] m_LightSpotAttenuations;
|
|
|
|
public SetupLightweightConstanstPass(LightweightForwardRenderer renderer) : base(renderer)
|
|
{
|
|
PerCameraBuffer._MainLightPosition = Shader.PropertyToID("_MainLightPosition");
|
|
PerCameraBuffer._MainLightColor = Shader.PropertyToID("_MainLightColor");
|
|
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");
|
|
PerCameraBuffer._LightIndexBuffer = Shader.PropertyToID("_LightIndexBuffer");
|
|
|
|
int maxVisibleLocalLights = renderer.maxVisibleLocalLights;
|
|
m_LightPositions = new Vector4[maxVisibleLocalLights];
|
|
m_LightColors = new Vector4[maxVisibleLocalLights];
|
|
m_LightDistanceAttenuations = new Vector4[maxVisibleLocalLights];
|
|
m_LightSpotDirections = new Vector4[maxVisibleLocalLights];
|
|
m_LightSpotAttenuations = new Vector4[maxVisibleLocalLights];
|
|
}
|
|
|
|
void InitializeLightConstants(List<VisibleLight> lights, int lightIndex, out Vector4 lightPos, out Vector4 lightColor, out Vector4 lightDistanceAttenuation, out Vector4 lightSpotDir,
|
|
out Vector4 lightSpotAttenuation)
|
|
{
|
|
lightPos = k_DefaultLightPosition;
|
|
lightColor = k_DefaultLightColor;
|
|
lightDistanceAttenuation = k_DefaultLightSpotAttenuation;
|
|
lightSpotDir = k_DefaultLightSpotDirection;
|
|
lightSpotAttenuation = k_DefaultLightAttenuation;
|
|
|
|
// 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);
|
|
}
|
|
|
|
// VisibleLight.finalColor already returns color in active color space
|
|
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, 1.0f);
|
|
}
|
|
|
|
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 cosOuterAngle = Mathf.Cos(Mathf.Deg2Rad * lightData.spotAngle * 0.5f);
|
|
// We neeed to do a null check for particle lights
|
|
// This should be changed in the future
|
|
// Particle lights will use an inline function
|
|
float cosInnerAngle;
|
|
if (lightData.light != null)
|
|
cosInnerAngle = Mathf.Cos(LightmapperUtils.ExtractInnerCone(lightData.light) * 0.5f);
|
|
else
|
|
cosInnerAngle = Mathf.Cos((2.0f * Mathf.Atan(Mathf.Tan(lightData.spotAngle * 0.5f * Mathf.Deg2Rad) * (64.0f - 18.0f) / 64.0f)) * 0.5f);
|
|
float smoothAngleRange = Mathf.Max(0.001f, cosInnerAngle - cosOuterAngle);
|
|
float invAngleRange = 1.0f / smoothAngleRange;
|
|
float add = -cosOuterAngle * invAngleRange;
|
|
lightSpotAttenuation = new Vector4(invAngleRange, add, 0.0f);
|
|
}
|
|
|
|
Light light = lightData.light;
|
|
|
|
// TODO: Add support to shadow mask
|
|
if (light != null && light.bakingOutput.mixedLightingMode == MixedLightingMode.Subtractive && light.bakingOutput.lightmapBakeType == LightmapBakeType.Mixed)
|
|
{
|
|
if (m_MixedLightingSetup == MixedLightingSetup.None && lightData.light.shadows != LightShadows.None)
|
|
{
|
|
m_MixedLightingSetup = MixedLightingSetup.Subtractive;
|
|
lightDistanceAttenuation.w = 0.0f;
|
|
}
|
|
}
|
|
}
|
|
|
|
void SetupShaderLightConstants(CommandBuffer cmd, ref LightData lightData)
|
|
{
|
|
// Clear to default all light constant data
|
|
for (int i = 0; i < renderer.maxVisibleLocalLights; ++i)
|
|
InitializeLightConstants(lightData.visibleLights, -1, out m_LightPositions[i],
|
|
out m_LightColors[i],
|
|
out m_LightDistanceAttenuations[i],
|
|
out m_LightSpotDirections[i],
|
|
out m_LightSpotAttenuations[i]);
|
|
|
|
m_MixedLightingSetup = MixedLightingSetup.None;
|
|
|
|
// 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, ref lightData);
|
|
SetupAdditionalLightConstants(cmd, ref lightData);
|
|
}
|
|
|
|
void SetupMainLightConstants(CommandBuffer cmd, ref LightData lightData)
|
|
{
|
|
Vector4 lightPos, lightColor, lightDistanceAttenuation, lightSpotDir, lightSpotAttenuation;
|
|
List<VisibleLight> lights = lightData.visibleLights;
|
|
InitializeLightConstants(lightData.visibleLights, lightData.mainLightIndex, out lightPos, out lightColor, out lightDistanceAttenuation, out lightSpotDir, out lightSpotAttenuation);
|
|
|
|
if (lightData.mainLightIndex >= 0)
|
|
{
|
|
VisibleLight mainLight = lights[lightData.mainLightIndex];
|
|
Light mainLightRef = mainLight.light;
|
|
|
|
if (LightweightPipeline.IsSupportedCookieType(mainLight.lightType) && mainLightRef.cookie != null)
|
|
{
|
|
Matrix4x4 lightCookieMatrix;
|
|
LightweightPipeline.GetLightCookieMatrix(mainLight, out lightCookieMatrix);
|
|
cmd.SetGlobalTexture(PerCameraBuffer._MainLightCookie, mainLightRef.cookie);
|
|
cmd.SetGlobalMatrix(PerCameraBuffer._WorldToLight, lightCookieMatrix);
|
|
}
|
|
}
|
|
|
|
cmd.SetGlobalVector(PerCameraBuffer._MainLightPosition, new Vector4(lightPos.x, lightPos.y, lightPos.z, lightDistanceAttenuation.w));
|
|
cmd.SetGlobalVector(PerCameraBuffer._MainLightColor, lightColor);
|
|
}
|
|
|
|
void SetupAdditionalLightConstants(CommandBuffer cmd, ref LightData lightData)
|
|
{
|
|
int maxVisibleLocalLights = renderer.maxVisibleLocalLights;
|
|
List<VisibleLight> lights = lightData.visibleLights;
|
|
if (lightData.totalAdditionalLightsCount > 0)
|
|
{
|
|
int localLightsCount = 0;
|
|
for (int i = 0; i < lights.Count && localLightsCount < maxVisibleLocalLights; ++i)
|
|
{
|
|
VisibleLight light = lights[i];
|
|
if (light.lightType != LightType.Directional)
|
|
{
|
|
InitializeLightConstants(lights, i, out m_LightPositions[localLightsCount],
|
|
out m_LightColors[localLightsCount],
|
|
out m_LightDistanceAttenuations[localLightsCount],
|
|
out m_LightSpotDirections[localLightsCount],
|
|
out m_LightSpotAttenuations[localLightsCount]);
|
|
localLightsCount++;
|
|
}
|
|
}
|
|
|
|
cmd.SetGlobalVector(PerCameraBuffer._AdditionalLightCount, new Vector4(lightData.pixelAdditionalLightsCount,
|
|
lightData.totalAdditionalLightsCount, 0.0f, 0.0f));
|
|
|
|
// if not using a compute buffer, engine will set indices in 2 vec4 constants
|
|
// unity_4LightIndices0 and unity_4LightIndices1
|
|
if (renderer.perObjectLightIndices != null)
|
|
cmd.SetGlobalBuffer("_LightIndexBuffer", renderer.perObjectLightIndices);
|
|
}
|
|
else
|
|
{
|
|
cmd.SetGlobalVector(PerCameraBuffer._AdditionalLightCount, Vector4.zero);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void SetShaderKeywords(CommandBuffer cmd, ref CameraData cameraData, ref LightData lightData, ref ShadowData shadowData)
|
|
{
|
|
int vertexLightsCount = lightData.totalAdditionalLightsCount - lightData.pixelAdditionalLightsCount;
|
|
|
|
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.AdditionalLights, lightData.totalAdditionalLightsCount > 0);
|
|
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.MixedLightingSubtractive, m_MixedLightingSetup == MixedLightingSetup.Subtractive);
|
|
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.VertexLights, vertexLightsCount > 0);
|
|
|
|
// TODO: We have to discuss cookie approach on LWRP.
|
|
// CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.MainLightCookieText, mainLightIndex != -1 && LightweightUtils.IsSupportedCookieType(visibleLights[mainLightIndex].lightType) && visibleLights[mainLightIndex].light.cookie != null);
|
|
|
|
LightShadows directionalShadowQuality = shadowData.renderedDirectionalShadowQuality;
|
|
LightShadows localShadowQuality = shadowData.renderedLocalShadowQuality;
|
|
|
|
// Currently shadow filtering keyword is shared between local and directional shadows.
|
|
bool hasSoftShadows = (directionalShadowQuality == LightShadows.Soft || localShadowQuality == LightShadows.Soft) &&
|
|
shadowData.supportsSoftShadows;
|
|
|
|
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.DirectionalShadows, directionalShadowQuality != LightShadows.None);
|
|
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.LocalShadows, localShadowQuality != LightShadows.None);
|
|
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.SoftShadows, hasSoftShadows);
|
|
CoreUtils.SetKeyword(cmd, LightweightKeywordStrings.CascadeShadows, shadowData.directionalLightCascadeCount > 1);
|
|
|
|
// TODO: Remove this. legacy particles support will be removed from Unity in 2018.3. This should be a shader_feature instead with prop exposed in the Standard particles shader.
|
|
CoreUtils.SetKeyword(cmd, "SOFTPARTICLES_ON", cameraData.requiresSoftParticles);
|
|
}
|
|
|
|
public override void Execute(ref ScriptableRenderContext context, ref CullResults cullResults, ref RenderingData renderingData)
|
|
{
|
|
CommandBuffer cmd = CommandBufferPool.Get("SetupShaderConstants");
|
|
SetupShaderLightConstants(cmd, ref renderingData.lightData);
|
|
SetShaderKeywords(cmd, ref renderingData.cameraData, ref renderingData.lightData, ref renderingData.shadowData);
|
|
context.ExecuteCommandBuffer(cmd);
|
|
CommandBufferPool.Release(cmd);
|
|
}
|
|
}
|
|
}
|