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156 lines
3.5 KiB
HLSL
156 lines
3.5 KiB
HLSL
#ifndef DECALS_COMMON_INCLUDED
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#define DECALS_COMMON_INCLUDED
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#include "AutoLight.cginc"
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#include "Lighting.cginc"
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#define CLIP_MARGIN 0.05
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#define EDGE_MARGIN 0.01
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// UNIFORM VARIABLES
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// Projection matrix, normal, and tangent vectors
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float4x4 _ProjectionMatrix;
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float3 _DecalNormal;
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float3 _DecalTangent;
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// Common Shading Paramaters
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float _Cutoff;
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float _DecalOpacity;
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float4 _Background;
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sampler2D _Decal;
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float4 _Decal_ST;
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// Variant Shading Parameters
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#ifdef DECAL_BASE_NORMAL
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sampler2D _BumpMap;
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float4 _BumpMap_ST;
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float _EdgeWearStrength;
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float _EdgeWearOffset;
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#endif //DECAL_BASE_NORMAL
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#ifdef DECAL_BUMPMAP
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sampler2D _BumpMap;
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float4 _BumpMap_ST;
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#endif //DECAL_BUMPMAP
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#ifdef DECAL_SPECMAP
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sampler2D _SpecMap;
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float4 _SpecMap_ST;
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// specular color is declared in a unity CGINC for some reason??
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fixed _Shininess;
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#endif //DECAL_SPECMAP
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#ifdef DECAL_EMISSIVE
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sampler2D _Emissive;
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float4 _Emissive_ST;
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fixed4 _Emissive_Color;
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#endif //DECAL_EMISSIVE
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// KSP EFFECTS
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// opacity and color
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float _Opacity;
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float4 _Color;
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float _RimFalloff;
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float4 _RimColor;
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// fog
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float4 _LocalCameraPos;
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float4 _LocalCameraDir;
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float4 _UnderwaterFogColor;
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float _UnderwaterMinAlphaFogDistance;
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float _UnderwaterMaxAlbedoFog;
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float _UnderwaterMaxAlphaFog;
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float _UnderwaterAlbedoDistanceScalar;
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float _UnderwaterAlphaDistanceScalar;
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float _UnderwaterFogFactor;
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// SURFACE INPUT STRUCT
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struct DecalSurfaceInput
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{
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float3 uv;
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float2 uv_decal;
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#ifdef DECAL_BUMPMAP
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float2 uv_bumpmap;
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#endif //DECAL_BUMPMAP
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#ifdef DECAL_SPECMAP
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float2 uv_specmap;
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#endif //DECAL_SPECMAP
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#ifdef DECAL_EMISSIVE
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float2 uv_emissive;
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#endif //DECAL_EMISSIVE
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#ifdef DECAL_BASE_NORMAL
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float3 normal;
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#endif //DECAL_BASE_NORMAL
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float3 vertex_normal;
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float3 viewDir;
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float3 worldPosition;
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};
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struct appdata_decal
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{
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float4 vertex : POSITION;
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float3 normal : NORMAL;
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#if defined(DECAL_BASE_NORMAL) || defined(DECAL_PREVIEW)
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float4 texcoord : TEXCOORD0;
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float4 tangent : TANGENT;
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#endif
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};
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struct v2f
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{
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UNITY_POSITION(pos);
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float3 normal : NORMAL;
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float4 uv_decal : TEXCOORD0;
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#ifdef DECAL_BASE_NORMAL
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float2 uv_base : TEXCOORD1;
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#endif //DECAL_BASE_NORMAL
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float4 tSpace0 : TEXCOORD2;
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float4 tSpace1 : TEXCOORD3;
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float4 tSpace2 : TEXCOORD4;
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#ifdef UNITY_PASS_FORWARDBASE
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fixed3 vlight : TEXCOORD5;
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UNITY_SHADOW_COORDS(6)
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#endif //UNITY_PASS_FORWARDBASE
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#ifdef UNITY_PASS_FORWARDADD
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UNITY_LIGHTING_COORDS(5,6)
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#endif //UNITY_PASS_FORWARDADD
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};
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inline void decalClipAlpha(float alpha) {
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#ifndef DECAL_PREVIEW
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clip(alpha - 0.001);
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#endif
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}
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inline float CalcMipLevel(float2 texture_coord) {
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float2 dx = ddx(texture_coord);
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float2 dy = ddy(texture_coord);
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float delta_max_sqr = max(dot(dx, dx), dot(dy, dy));
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return 0.5 * log2(delta_max_sqr);
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}
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inline float BoundsDist(float3 p, float3 normal, float3 projNormal) {
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float3 q = abs(p - 0.5) - 0.5; // 1x1 square/cube centered at (0.5,0.5)
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//float dist = length(max(q,0)) + min(max(q.x,max(q.y,q.z)),0.0); // true SDF
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#ifdef DECAL_PREVIEW
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return 10 * max(q.x, q.y); // 2D pseudo SDF
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#else
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float dist = max(max(q.x, q.y), q.z); // pseudo SDF
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float ndist = EDGE_MARGIN - dot(normal, projNormal); // SDF to normal
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return 10 * max(dist, ndist); // return intersection
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#endif //DECAL_PREVIEW
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}
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#endif |