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Merge pull request #668 from Unity-Technologies/Create-evaluatoin-light-folder 

Move light function to LightEvaluation.hlsl file
/namespace
GitHub 7 年前
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bdaabe70
共有 4 个文件被更改，包括 191 次插入 和 169 次删除
  1. 171
      ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl
  2. 4
      ScriptableRenderPipeline/HDRenderPipeline/Material/Material.hlsl
  3. 176
      ScriptableRenderPipeline/HDRenderPipeline/Lighting/LightEvaluation.hlsl
  4. 9
      ScriptableRenderPipeline/HDRenderPipeline/Lighting/LightEvaluation.hlsl.meta

171
ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl
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#ifdef HAS_LIGHTLOOP
#ifndef _SURFACE_TYPE_TRANSPARENT
#define USE_DEFERRED_DIRECTIONAL_SHADOWS // Deferred shadows are always enabled for opaque objects
#endif
#include "../../Lighting/Lightevaluation.hlsl"
//-----------------------------------------------------------------------------
// Lighting structure for light accumulation
//-----------------------------------------------------------------------------

// EvaluateBSDF_Directional
//-----------------------------------------------------------------------------
float3 EvaluateCookie_Directional(LightLoopContext lightLoopContext, DirectionalLightData lightData,
float3 lighToSample)
{
// Compute the CS position (in [-1, 1]^2) by projecting 'positionWS' onto the near plane.
// 'lightData.right' and 'lightData.up' are pre-scaled on CPU.
float3x3 lightToWorld = float3x3(lightData.right, lightData.up, lightData.forward);
float3 positionLS = mul(lighToSample, transpose(lightToWorld));
float2 positionCS = positionLS.xy;
// Remap the texture coordinates from [-1, 1]^2 to [0, 1]^2.
float2 positionNDC = positionCS * 0.5 + 0.5;
// Tile the texture if the 'repeat' wrap mode is enabled.
positionNDC = lightData.tileCookie ? frac(positionNDC) : positionNDC;
// We let the sampler handle clamping to border.
return SampleCookie2D(lightLoopContext, positionNDC, lightData.cookieIndex);
}
// None of the outputs are premultiplied.
void EvaluateLight_Directional(LightLoopContext lightLoopContext, PositionInputs posInput,
DirectionalLightData lightData, BakeLightingData bakeLightingData,
float3 N, float3 L,
out float3 color, out float attenuation)
{
float3 positionWS = posInput.positionWS;
float shadow = 1.0;
float shadowMask = 1.0;
color = lightData.color;
attenuation = 1.0;
#ifdef SHADOWS_SHADOWMASK
// shadowMaskSelector.x is -1 if there is no shadow mask
// Note that we override shadow value (in case we don't have any dynamic shadow)
shadow = shadowMask = (lightData.shadowMaskSelector.x >= 0.0) ? dot(bakeLightingData.bakeShadowMask, lightData.shadowMaskSelector) : 1.0;
#endif
[branch] if (lightData.shadowIndex >= 0)
{
#ifdef USE_DEFERRED_DIRECTIONAL_SHADOWS
shadow = LOAD_TEXTURE2D(_DeferredShadowTexture, posInput.positionSS).x;
#else
shadow = GetDirectionalShadowAttenuation(lightLoopContext.shadowContext, positionWS, N, lightData.shadowIndex, L, posInput.positionSS);
#endif
#ifdef SHADOWS_SHADOWMASK
float fade = saturate(posInput.linearDepth * lightData.fadeDistanceScaleAndBias.x + lightData.fadeDistanceScaleAndBias.y);
// See comment in EvaluateBSDF_Punctual
shadow = lightData.dynamicShadowCasterOnly ? min(shadowMask, shadow) : shadow;
shadow = lerp(shadow, shadowMask, fade); // Caution to lerp parameter: fade is the reverse of shadowDimmer
// Note: There is no shadowDimmer when there is no shadow mask
#endif
}
attenuation *= shadow;
[branch] if (lightData.cookieIndex >= 0)
{
float3 lightToSample = positionWS - lightData.positionWS;
float3 cookie = EvaluateCookie_Directional(lightLoopContext, lightData, lightToSample);
color *= cookie;
}
}
DirectLighting EvaluateBSDF_Directional(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput, PreLightData preLightData,
DirectionalLightData lightData, BSDFData bsdfData,

//-----------------------------------------------------------------------------
// EvaluateBSDF_Punctual (supports spot, point and projector lights)
//-----------------------------------------------------------------------------
float4 EvaluateCookie_Punctual(LightLoopContext lightLoopContext, LightData lightData,
float3 lighToSample)
{
int lightType = lightData.lightType;
// Translate and rotate 'positionWS' into the light space.
// 'lightData.right' and 'lightData.up' are pre-scaled on CPU.
float3x3 lightToWorld = float3x3(lightData.right, lightData.up, lightData.forward);
float3 positionLS = mul(lighToSample, transpose(lightToWorld));
float4 cookie;
[branch] if (lightType == GPULIGHTTYPE_POINT)
{
cookie.rgb = SampleCookieCube(lightLoopContext, positionLS, lightData.cookieIndex);
cookie.a = 1;
}
else
{
// Compute the NDC position (in [-1, 1]^2) by projecting 'positionWS' onto the plane at 1m distance.
// Box projector lights require no perspective division.
float perspectiveZ = (lightType != GPULIGHTTYPE_PROJECTOR_BOX) ? positionLS.z : 1.0;
float2 positionCS = positionLS.xy / perspectiveZ;
bool isInBounds = Max3(abs(positionCS.x), abs(positionCS.y), 1.0 - positionLS.z) <= 1.0;
// Remap the texture coordinates from [-1, 1]^2 to [0, 1]^2.
float2 positionNDC = positionCS * 0.5 + 0.5;
// Manually clamp to border (black).
cookie.rgb = SampleCookie2D(lightLoopContext, positionNDC, lightData.cookieIndex);
cookie.a = isInBounds ? 1 : 0;
}
return cookie;
}
float GetPunctualShapeAttenuation(LightData lightData, float3 L, float distSq)
{
// Note: lightData.invSqrAttenuationRadius is 0 when applyRangeAttenuation is false
float attenuation = GetDistanceAttenuation(distSq, lightData.invSqrAttenuationRadius);
// Reminder: lights are oriented backward (-Z)
return attenuation * GetAngleAttenuation(L, -lightData.forward, lightData.angleScale, lightData.angleOffset);
}
// None of the outputs are premultiplied.
void EvaluateLight_Punctual(LightLoopContext lightLoopContext, PositionInputs posInput,
LightData lightData, BakeLightingData bakeLightingData,
float3 N, float3 L, float dist, float distSq,
out float3 color, out float attenuation)
{
float3 positionWS = posInput.positionWS;
float shadow = 1.0;
float shadowMask = 1.0;
color = lightData.color;
attenuation = GetPunctualShapeAttenuation(lightData, L, distSq);
#ifdef SHADOWS_SHADOWMASK
// shadowMaskSelector.x is -1 if there is no shadow mask
// Note that we override shadow value (in case we don't have any dynamic shadow)
shadow = shadowMask = (lightData.shadowMaskSelector.x >= 0.0) ? dot(bakeLightingData.bakeShadowMask, lightData.shadowMaskSelector) : 1.0;
#endif
[branch] if (lightData.shadowIndex >= 0)
{
// TODO: make projector lights cast shadows.
float3 offset = float3(0.0, 0.0, 0.0); // GetShadowPosOffset(nDotL, normal);
float4 L_dist = float4(L, dist);
shadow = GetPunctualShadowAttenuation(lightLoopContext.shadowContext, positionWS + offset, N, lightData.shadowIndex, L_dist, posInput.positionSS);
#ifdef SHADOWS_SHADOWMASK
// Note: Legacy Unity have two shadow mask mode. ShadowMask (ShadowMask contain static objects shadow and ShadowMap contain only dynamic objects shadow, final result is the minimun of both value)
// and ShadowMask_Distance (ShadowMask contain static objects shadow and ShadowMap contain everything and is blend with ShadowMask based on distance (Global distance setup in QualitySettigns)).
// HDRenderPipeline change this behavior. Only ShadowMask mode is supported but we support both blend with distance AND minimun of both value. Distance is control by light.
// The following code do this.
// The min handle the case of having only dynamic objects in the ShadowMap
// The second case for blend with distance is handled with ShadowDimmer. ShadowDimmer is define manually and by shadowDistance by light.
// With distance, ShadowDimmer become one and only the ShadowMask appear, we get the blend with distance behavior.
shadow = lightData.dynamicShadowCasterOnly ? min(shadowMask, shadow) : shadow;
shadow = lerp(shadowMask, shadow, lightData.shadowDimmer);
#else
shadow = lerp(1.0, shadow, lightData.shadowDimmer);
#endif
}
attenuation *= shadow;
// Projector lights always have cookies, so we can perform clipping inside the if().
[branch] if (lightData.cookieIndex >= 0)
{
float3 lightToSample = positionWS - lightData.positionWS;
float4 cookie = EvaluateCookie_Punctual(lightLoopContext, lightData, lightToSample);
color *= cookie.rgb;
attenuation *= cookie.a;
}
}
DirectLighting EvaluateBSDF_Punctual(LightLoopContext lightLoopContext,
float3 V, PositionInputs posInput,

4
ScriptableRenderPipeline/HDRenderPipeline/Material/Material.hlsl
查看文件


// - _BLENDMODE_PRESERVE_SPECULAR_LIGHTING for correct lighting when blend mode are use with a Lit material
// - _ENABLE_FOG_ON_TRANSPARENT if fog is enable on transparent surface
#ifndef _SURFACE_TYPE_TRANSPARENT
#define USE_DEFERRED_DIRECTIONAL_SHADOWS // Deferred shadows are always enabled for opaque objects
#endif
//-----------------------------------------------------------------------------
// ApplyBlendMode function
//-----------------------------------------------------------------------------

176
ScriptableRenderPipeline/HDRenderPipeline/Lighting/LightEvaluation.hlsl
查看文件


// This files include various function uses to evaluate lights
// To use deferred directional shadow with cascaded shadow map,
// it is required to define USE_DEFERRED_DIRECTIONAL_SHADOWS before including this files
//-----------------------------------------------------------------------------
// Directional Light evaluation helper
//-----------------------------------------------------------------------------
float3 EvaluateCookie_Directional(LightLoopContext lightLoopContext, DirectionalLightData lightData,
float3 lighToSample)
{
// Compute the CS position (in [-1, 1]^2) by projecting 'positionWS' onto the near plane.
// 'lightData.right' and 'lightData.up' are pre-scaled on CPU.
float3x3 lightToWorld = float3x3(lightData.right, lightData.up, lightData.forward);
float3 positionLS = mul(lighToSample, transpose(lightToWorld));
float2 positionCS = positionLS.xy;
// Remap the texture coordinates from [-1, 1]^2 to [0, 1]^2.
float2 positionNDC = positionCS * 0.5 + 0.5;
// Tile the texture if the 'repeat' wrap mode is enabled.
positionNDC = lightData.tileCookie ? frac(positionNDC) : positionNDC;
// We let the sampler handle clamping to border.
return SampleCookie2D(lightLoopContext, positionNDC, lightData.cookieIndex);
}
// None of the outputs are premultiplied.
void EvaluateLight_Directional(LightLoopContext lightLoopContext, PositionInputs posInput,
DirectionalLightData lightData, BakeLightingData bakeLightingData,
float3 N, float3 L,
out float3 color, out float attenuation)
{
float3 positionWS = posInput.positionWS;
float shadow = 1.0;
float shadowMask = 1.0;
color = lightData.color;
attenuation = 1.0;
#ifdef SHADOWS_SHADOWMASK
// shadowMaskSelector.x is -1 if there is no shadow mask
// Note that we override shadow value (in case we don't have any dynamic shadow)
shadow = shadowMask = (lightData.shadowMaskSelector.x >= 0.0) ? dot(bakeLightingData.bakeShadowMask, lightData.shadowMaskSelector) : 1.0;
#endif
[branch] if (lightData.shadowIndex >= 0)
{
#ifdef USE_DEFERRED_DIRECTIONAL_SHADOWS
shadow = LOAD_TEXTURE2D(_DeferredShadowTexture, posInput.positionSS).x;
#else
shadow = GetDirectionalShadowAttenuation(lightLoopContext.shadowContext, positionWS, N, lightData.shadowIndex, L, posInput.positionSS);
#endif
#ifdef SHADOWS_SHADOWMASK
float fade = saturate(posInput.linearDepth * lightData.fadeDistanceScaleAndBias.x + lightData.fadeDistanceScaleAndBias.y);
// See comment in EvaluateBSDF_Punctual
shadow = lightData.dynamicShadowCasterOnly ? min(shadowMask, shadow) : shadow;
shadow = lerp(shadow, shadowMask, fade); // Caution to lerp parameter: fade is the reverse of shadowDimmer
// Note: There is no shadowDimmer when there is no shadow mask
#endif
}
attenuation *= shadow;
[branch] if (lightData.cookieIndex >= 0)
{
float3 lightToSample = positionWS - lightData.positionWS;
float3 cookie = EvaluateCookie_Directional(lightLoopContext, lightData, lightToSample);
color *= cookie;
}
}
//-----------------------------------------------------------------------------
// Punctual Light evaluation helper
//-----------------------------------------------------------------------------
float4 EvaluateCookie_Punctual(LightLoopContext lightLoopContext, LightData lightData,
float3 lighToSample)
{
int lightType = lightData.lightType;
// Translate and rotate 'positionWS' into the light space.
// 'lightData.right' and 'lightData.up' are pre-scaled on CPU.
float3x3 lightToWorld = float3x3(lightData.right, lightData.up, lightData.forward);
float3 positionLS = mul(lighToSample, transpose(lightToWorld));
float4 cookie;
[branch] if (lightType == GPULIGHTTYPE_POINT)
{
cookie.rgb = SampleCookieCube(lightLoopContext, positionLS, lightData.cookieIndex);
cookie.a = 1;
}
else
{
// Compute the NDC position (in [-1, 1]^2) by projecting 'positionWS' onto the plane at 1m distance.
// Box projector lights require no perspective division.
float perspectiveZ = (lightType != GPULIGHTTYPE_PROJECTOR_BOX) ? positionLS.z : 1.0;
float2 positionCS = positionLS.xy / perspectiveZ;
bool isInBounds = Max3(abs(positionCS.x), abs(positionCS.y), 1.0 - positionLS.z) <= 1.0;
// Remap the texture coordinates from [-1, 1]^2 to [0, 1]^2.
float2 positionNDC = positionCS * 0.5 + 0.5;
// Manually clamp to border (black).
cookie.rgb = SampleCookie2D(lightLoopContext, positionNDC, lightData.cookieIndex);
cookie.a = isInBounds ? 1 : 0;
}
return cookie;
}
float GetPunctualShapeAttenuation(LightData lightData, float3 L, float distSq)
{
// Note: lightData.invSqrAttenuationRadius is 0 when applyRangeAttenuation is false
float attenuation = GetDistanceAttenuation(distSq, lightData.invSqrAttenuationRadius);
// Reminder: lights are oriented backward (-Z)
return attenuation * GetAngleAttenuation(L, -lightData.forward, lightData.angleScale, lightData.angleOffset);
}
// None of the outputs are premultiplied.
void EvaluateLight_Punctual(LightLoopContext lightLoopContext, PositionInputs posInput,
LightData lightData, BakeLightingData bakeLightingData,
float3 N, float3 L, float dist, float distSq,
out float3 color, out float attenuation)
{
float3 positionWS = posInput.positionWS;
float shadow = 1.0;
float shadowMask = 1.0;
color = lightData.color;
attenuation = GetPunctualShapeAttenuation(lightData, L, distSq);
#ifdef SHADOWS_SHADOWMASK
// shadowMaskSelector.x is -1 if there is no shadow mask
// Note that we override shadow value (in case we don't have any dynamic shadow)
shadow = shadowMask = (lightData.shadowMaskSelector.x >= 0.0) ? dot(bakeLightingData.bakeShadowMask, lightData.shadowMaskSelector) : 1.0;
#endif
[branch] if (lightData.shadowIndex >= 0)
{
// TODO: make projector lights cast shadows.
float3 offset = float3(0.0, 0.0, 0.0); // GetShadowPosOffset(nDotL, normal);
float4 L_dist = float4(L, dist);
shadow = GetPunctualShadowAttenuation(lightLoopContext.shadowContext, positionWS + offset, N, lightData.shadowIndex, L_dist, posInput.positionSS);
#ifdef SHADOWS_SHADOWMASK
// Note: Legacy Unity have two shadow mask mode. ShadowMask (ShadowMask contain static objects shadow and ShadowMap contain only dynamic objects shadow, final result is the minimun of both value)
// and ShadowMask_Distance (ShadowMask contain static objects shadow and ShadowMap contain everything and is blend with ShadowMask based on distance (Global distance setup in QualitySettigns)).
// HDRenderPipeline change this behavior. Only ShadowMask mode is supported but we support both blend with distance AND minimun of both value. Distance is control by light.
// The following code do this.
// The min handle the case of having only dynamic objects in the ShadowMap
// The second case for blend with distance is handled with ShadowDimmer. ShadowDimmer is define manually and by shadowDistance by light.
// With distance, ShadowDimmer become one and only the ShadowMask appear, we get the blend with distance behavior.
shadow = lightData.dynamicShadowCasterOnly ? min(shadowMask, shadow) : shadow;
shadow = lerp(shadowMask, shadow, lightData.shadowDimmer);
#else
shadow = lerp(1.0, shadow, lightData.shadowDimmer);
#endif
}
attenuation *= shadow;
// Projector lights always have cookies, so we can perform clipping inside the if().
[branch] if (lightData.cookieIndex >= 0)
{
float3 lightToSample = positionWS - lightData.positionWS;
float4 cookie = EvaluateCookie_Punctual(lightLoopContext, lightData, lightToSample);
color *= cookie.rgb;
attenuation *= cookie.a;
}
}

9
ScriptableRenderPipeline/HDRenderPipeline/Lighting/LightEvaluation.hlsl.meta
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