193 lines
5.1 KiB
HLSL
193 lines
5.1 KiB
HLSL
// Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.
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#ifndef __MATERIAL_COMMON__
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#define __MATERIAL_COMMON__
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// Material input types
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#define MATERIAL_DOMAIN_SURFACE 0
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#define MATERIAL_DOMAIN_POSTPROCESS 1
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#define MATERIAL_DOMAIN_DECAL 2
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#define MATERIAL_BLEND_OPAQUE 0
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#define MATERIAL_BLEND_TRANSPARENT 1
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#define MATERIAL_BLEND_ADDITIVE 2
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#define MATERIAL_BLEND_MULTIPLY 3
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#define MATERIAL_TESSELLATION_NONE 0
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#define MATERIAL_TESSELLATION_FLAT 1
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#define MATERIAL_TESSELLATION_PN 2
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#define MATERIAL_TESSELLATION_PHONG 3
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#define USE_CUSTOM_VERTEX_INTERPOLATORS (CUSTOM_VERTEX_INTERPOLATORS_COUNT > 0)
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// Validate inputs
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#ifndef MATERIAL
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#define MATERIAL 0
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#endif
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#ifndef MATERIAL_DOMAIN
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#define MATERIAL_DOMAIN MATERIAL_DOMAIN_SURFACE
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#endif
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#ifndef MATERIAL_BLEND
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#define MATERIAL_BLEND MATERIAL_BLEND_OPAQUE
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#endif
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#ifndef MATERIAL_SHADING_MODEL
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#define MATERIAL_SHADING_MODEL SHADING_MODEL_LIT
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#endif
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#ifndef USE_INSTANCING
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#define USE_INSTANCING 0
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#endif
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#ifndef USE_SKINNING
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#define USE_SKINNING 0
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#endif
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#ifndef USE_LIGHTMAP
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#define USE_LIGHTMAP 0
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#endif
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#ifndef USE_POSITION_OFFSET
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#define USE_POSITION_OFFSET 0
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#endif
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#ifndef USE_VERTEX_COLOR
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#define USE_VERTEX_COLOR 0
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#endif
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#ifndef USE_DISPLACEMENT
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#define USE_DISPLACEMENT 0
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#endif
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#ifndef USE_TESSELLATION
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#define USE_TESSELLATION 0
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#endif
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#ifndef USE_DITHERED_LOD_TRANSITION
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#define USE_DITHERED_LOD_TRANSITION 0
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#endif
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#ifndef MATERIAL_TESSELLATION
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#define MATERIAL_TESSELLATION MATERIAL_TESSELLATION_NONE
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#endif
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#ifndef MAX_TESSELLATION_FACTOR
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#define MAX_TESSELLATION_FACTOR 15
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#endif
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#ifndef PER_BONE_MOTION_BLUR
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#define PER_BONE_MOTION_BLUR 0
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#endif
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// Material properties
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struct Material
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{
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float3 Emissive;
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float Roughness;
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float3 Color;
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float AO;
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float3 WorldNormal;
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float Metalness;
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float3 TangentNormal;
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float Specular;
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float3 PositionOffset;
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float Opacity;
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float3 SubsurfaceColor;
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float Refraction;
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float Mask;
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float TessellationMultiplier;
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float3 WorldDisplacement;
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#if USE_CUSTOM_VERTEX_INTERPOLATORS
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float4 CustomVSToPS[CUSTOM_VERTEX_INTERPOLATORS_COUNT];
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#endif
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};
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struct ModelInput
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{
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float3 Position : POSITION;
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float2 TexCoord : TEXCOORD0;
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float4 Normal : NORMAL;
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float4 Tangent : TANGENT;
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float2 LightmapUV : TEXCOORD1;
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#if USE_VERTEX_COLOR
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half4 Color : COLOR;
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#endif
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#if USE_INSTANCING
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float4 InstanceOrigin : ATTRIBUTE0; // .w contains PerInstanceRandom
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float4 InstanceTransform1 : ATTRIBUTE1; // .w contains LODDitherFactor
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float3 InstanceTransform2 : ATTRIBUTE2;
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float3 InstanceTransform3 : ATTRIBUTE3;
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half4 InstanceLightmapArea : ATTRIBUTE4;
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#endif
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};
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struct ModelInput_PosOnly
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{
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float3 Position : POSITION;
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#if USE_INSTANCING
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float4 InstanceOrigin : ATTRIBUTE0; // .w contains PerInstanceRandom
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float4 InstanceTransform1 : ATTRIBUTE1; // .w contains LODDitherFactor
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float3 InstanceTransform2 : ATTRIBUTE2;
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float3 InstanceTransform3 : ATTRIBUTE3;
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half4 InstanceLightmapArea : ATTRIBUTE4;
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#endif
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};
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struct ModelInput_Skinned
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{
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float3 Position : POSITION;
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float2 TexCoord : TEXCOORD0;
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float4 Normal : NORMAL;
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float4 Tangent : TANGENT;
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uint4 BlendIndices : BLENDINDICES;
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float4 BlendWeights : BLENDWEIGHT;
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#if USE_INSTANCING
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float4 InstanceOrigin : ATTRIBUTE0; // .w contains PerInstanceRandom
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float4 InstanceTransform1 : ATTRIBUTE1; // .w contains LODDitherFactor
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float3 InstanceTransform2 : ATTRIBUTE2;
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float3 InstanceTransform3 : ATTRIBUTE3;
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half4 InstanceLightmapArea : ATTRIBUTE4;
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#endif
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};
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struct Model_VS2PS
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{
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float4 Position : SV_Position;
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float4 ScreenPos : TEXCOORD0;
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};
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struct GBufferOutput
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{
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float4 Light : SV_Target0;
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float4 RT0 : SV_Target1;
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float4 RT1 : SV_Target2;
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float4 RT2 : SV_Target3;
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float4 RT3 : SV_Target4;
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};
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float3x3 CalcTangentBasis(float3 normal, float3 pos, float2 uv)
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{
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// References:
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// http://www.thetenthplanet.de/archives/1180
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// https://zhangdoa.com/posts/normal-and-normal-mapping
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float3 dp1 = ddx(pos);
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float3 dp2 = ddy(pos);
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float2 duv1 = ddx(uv);
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float2 duv2 = ddy(uv);
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float3 dp2perp = cross(dp2, normal);
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float3 dp1perp = cross(normal, dp1);
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float3 tangent = normalize(dp2perp * duv1.x + dp1perp * duv2.x);
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float3 bitangent = normalize(dp2perp * duv1.y + dp1perp * duv2.y);
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return float3x3(tangent, bitangent, normal);
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}
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float3x3 CalcTangentBasisFromWorldNormal(float3 normal)
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{
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float3 tangent = cross(normal, float3(1, 0, 0));
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float3 bitangent = cross(normal, tangent);
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return float3x3(tangent, bitangent, normal);
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}
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float3x3 CalcTangentBasis(float3 normal, float4 tangent)
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{
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float3 bitangent = cross(normal, tangent.xyz) * tangent.w;
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return float3x3(tangent.xyz, bitangent, normal);
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}
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// [Jimenez et al. 2016, "Practical Realtime Strategies for Accurate Indirect Occlusion"]
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float3 AOMultiBounce(float visibility, float3 albedo)
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{
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float3 a = 2.0404 * albedo - 0.3324;
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float3 b = -4.7951 * albedo + 0.6417;
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float3 c = 2.7552 * albedo + 0.6903;
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return max(visibility, ((visibility * a + b) * visibility + c) * visibility);
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}
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#endif
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