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Add **Screen Space Reflections for transparent materials**

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This commit is contained in:
Wojtek Figat
2022-04-12 22:16:06 +02:00
parent e32ad93020
commit 58491e6d23
8 changed files with 207 additions and 11 deletions
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28
Content/Editor/MaterialTemplates/Features/ForwardShading.hlsl
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@@ -6,6 +6,10 @@
#include "./Flax/LightingCommon.hlsl"
#if USE_REFLECTIONS
#include "./Flax/ReflectionsCommon.hlsl"
#define MATERIAL_REFLECTIONS_SSR 1
#if MATERIAL_REFLECTIONS == MATERIAL_REFLECTIONS_SSR
#include "./Flax/SSR.hlsl"
#endif
#endif
#include "./Flax/Lighting.hlsl"
#include "./Flax/ShadowsSampling.hlsl"
@@ -93,9 +97,29 @@ float4 PS_Forward(PixelInput input) : SV_Target0
light += GetLighting(ViewPos, localLight, gBuffer, shadowMask, true, isSpotLight);
}
#if USE_REFLECTIONS
// Calculate reflections
light.rgb += GetEnvProbeLighting(ViewPos, EnvProbe, EnvironmentProbe, gBuffer) * light.a;
#if USE_REFLECTIONS
float3 reflections = SampleReflectionProbe(ViewPos, EnvProbe, EnvironmentProbe, gBuffer.WorldPos, gBuffer.Normal, gBuffer.Roughness).rgb;
#if MATERIAL_REFLECTIONS == MATERIAL_REFLECTIONS_SSR
// Screen Space Reflections
Texture2D sceneDepthTexture = MATERIAL_REFLECTIONS_SSR_DEPTH; // Material Generator inserts depth and color buffers and plugs it via internal define
Texture2D sceneColorTexture = MATERIAL_REFLECTIONS_SSR_COLOR;
float2 screenUV = materialInput.SvPosition.xy * ScreenSize.zw;
float stepSize = ScreenSize.z; // 1 / screenWidth
float maxSamples = 32;
float worldAntiSelfOcclusionBias = 0.1f;
float brdfBias = 0.82f;
float drawDistance = 5000.0f;
float3 hit = TraceSceenSpaceReflection(screenUV, gBuffer, sceneDepthTexture, ViewPos, ViewMatrix, ViewProjectionMatrix, stepSize, maxSamples, false, 0.0f, worldAntiSelfOcclusionBias, brdfBias, drawDistance);
if (hit.z > 0)
{
float3 screenColor = sceneColorTexture.SampleLevel(SamplerPointClamp, hit.xy, 0).rgb;
reflections = lerp(reflections, screenColor, hit.z);
}
#endif
light.rgb += reflections * GetReflectionSpecularLighting(ViewPos, gBuffer) * light.a;
#endif
// Add lighting (apply ambient occlusion)