diff options
Diffstat (limited to 'VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiFurCardPass.cginc')
| -rw-r--r-- | VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiFurCardPass.cginc | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiFurCardPass.cginc b/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiFurCardPass.cginc new file mode 100644 index 00000000..d7600752 --- /dev/null +++ b/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiFurCardPass.cginc @@ -0,0 +1,200 @@ +#include "UnityCG.cginc" +#include "Lighting.cginc" +#include "UnityPBSLighting.cginc" +#include "AutoLight.cginc" + +struct appdata +{ + float4 vertex: POSITION; + float3 normal: NORMAL; + float4 tangent: TANGENT; + float2 uv0: TEXCOORD0; + uint id: SV_VertexID; + UNITY_VERTEX_INPUT_INSTANCE_ID +}; + +struct v2g +{ + float4 pos: SV_POSITION; + float2 uv0: TEXCOORD0; + float3 normal: TEXCOORD4; + float3 tangent: TEXCOORD5; + uint vid: TEXCOORD6; + float3 worldPos: TEXCOORD7; + float3 binormal: TEXCOORD8; + UNITY_VERTEX_INPUT_INSTANCE_ID + UNITY_VERTEX_OUTPUT_STEREO +}; + +struct g2f +{ + float4 pos: SV_POSITION; + float4 uv: TEXCOORD0; + float3 worldPos: TEXCOORD1; + float3 normal: TEXCOORD4; + float3 tangent: TEXCOORD5; + float startToEndGradient: TEXCOORD6; + UNITY_VERTEX_INPUT_INSTANCE_ID + UNITY_VERTEX_OUTPUT_STEREO +}; + +float3 CreateBinormal(float3 normal, float3 tangent, float binormalSign) +{ + return cross(normal, tangent.xyz) * + (binormalSign * unity_WorldTransformParams.w); +} + +v2g furVert(appdata v) +{ + v2g o; + UNITY_SETUP_INSTANCE_ID(v); + UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o); + UNITY_TRANSFER_INSTANCE_ID(v, o); + o.worldPos = mul(unity_ObjectToWorld, v.vertex); + o.pos = UnityObjectToClipPos(v.vertex); + o.normal = UnityObjectToWorldNormal(v.normal); + o.tangent = UnityObjectToWorldDir(v.tangent.xyz); + o.binormal = CreateBinormal(o.normal, o.tangent, v.tangent.w); + o.uv0 = v.uv0.xy; + o.vid = v.id; + return o; +} + +float random(float2 vids) +{ + return frac(sin(dot(vids, float2(12.9898, 78.2383))) * 43758.5453123); +} + +sampler2D _FurCombMap; float4 _FurCombMap_ST; +float _FurWidth; +float _FurCardLength; +float _FurRaised; + +#include "PoiMath.cginc" + +[maxvertexcount(6)] +void furGeom(triangle v2g IN[3], inout TriangleStream < g2f > tristream) +{ + float randomValueA = random(float2(IN[0].vid + IN[2].vid, IN[2].vid + IN[0].vid)); + float randomValueB = random(float2(IN[1].vid + IN[2].vid, IN[1].vid + IN[0].vid)); + float randomValueC = random(float2(IN[2].vid + IN[2].vid, IN[0].vid + IN[0].vid)); + + float3 polySideA = IN[1].worldPos.xyz - IN[0].worldPos.xyz; + float3 polySideB = IN[2].worldPos.xyz - IN[0].worldPos.xyz; + float3 c = cross(polySideA, polySideB); + float3 outDir = normalize(c); + float3 furRootPos = float4(IN[0].worldPos.xyz + (polySideA * randomValueA) + (polySideB * randomValueB), 1); + + float3 rootTangent = normalize((IN[0].tangent + IN[1].tangent + IN[2].tangent) * .3333333); + float3 rootNormal = normalize((IN[0].normal + IN[1].normal + IN[2].normal) * .3333333); + float3 rootBinormal = normalize((IN[0].binormal + IN[1].binormal + IN[2].binormal) * .3333333); + float3 furRight = normalize(cross(IN[0].binormal, outDir)); + float2 rootUV = (IN[0].uv0 + IN[1].uv0 + IN[2].uv0) * .333333; + half3 tangentSpaceNormal = UnpackNormal(tex2Dlod(_FurCombMap, float4(TRANSFORM_TEX(rootUV, _FurCombMap), 0, 0))); + float3 furForward = normalize( + tangentSpaceNormal.x * rootTangent + + tangentSpaceNormal.y * rootBinormal + + tangentSpaceNormal.z * rootNormal + ); + + furForward = (lerp(furForward, outDir, _FurRaised)); + //furForward = rotate_with_quaternion(furForward, float3(_FurRaised,0,0)); + + g2f o; + float4 worldPos[4]; + float4 pos[4]; + float4 uv[4]; + uv[0] = float4(0, 0, rootUV); + uv[1] = float4(0, 1, rootUV); + uv[2] = float4(1, 1, rootUV); + uv[3] = float4(1, 0, rootUV); + + _FurWidth *= .01; + _FurCardLength *= .01; + + worldPos[3] = mul(unity_WorldToObject, float4(furRootPos + (furRight * _FurWidth) + (furForward * _FurCardLength), 1)); + worldPos[2] = mul(unity_WorldToObject, float4(furRootPos + (furRight * _FurWidth), 1)); + worldPos[1] = mul(unity_WorldToObject, float4(furRootPos + (-furRight * _FurWidth), 1)); + worldPos[0] = mul(unity_WorldToObject, float4(furRootPos + (-furRight * _FurWidth) + (furForward * _FurCardLength), 1)); + + pos[3] = UnityObjectToClipPos(worldPos[3]); + pos[2] = UnityObjectToClipPos(worldPos[2]); + pos[1] = UnityObjectToClipPos(worldPos[1]); + pos[0] = UnityObjectToClipPos(worldPos[0]); + + o.normal = rootNormal; + o.tangent = furForward; + o.worldPos = worldPos[0]; + o.pos = pos[0]; + o.uv = uv[0]; + o.startToEndGradient = 1; + tristream.Append(o); + o.worldPos = worldPos[1]; + o.pos = pos[1]; + o.uv = uv[1]; + o.startToEndGradient = 0; + tristream.Append(o); + o.worldPos = worldPos[2]; + o.pos = pos[2]; + o.uv = uv[2]; + o.startToEndGradient = 0; + tristream.Append(o); + + tristream.RestartStrip(); + o.worldPos = worldPos[2]; + o.pos = pos[2]; + o.uv = uv[2]; + o.startToEndGradient = 0; + tristream.Append(o); + o.worldPos = worldPos[3]; + o.pos = pos[3]; + o.uv = uv[3]; + o.startToEndGradient = 1; + tristream.Append(o); + o.worldPos = worldPos[0]; + o.pos = pos[0]; + o.uv = uv[0]; + o.startToEndGradient = 1; + tristream.Append(o); + + tristream.RestartStrip(); +} + +sampler2D _FurCardTexture; float4 _FurCardTexture_ST; float4 _FurCardTexture_TexelSize; +sampler2D _FurCardAlphaTexture; float4 _FurCardAlphaTexture_ST; float4 _FurCardAlphaTexture_TexelSize; +sampler2D _FurPattern; float4 _FurPattern_ST; +float _FurClip; +fixed _FurAoStrength; +float CalcMipLevel(float2 uv) +{ + float2 dx = ddx(uv * _FurCardTexture_TexelSize.zw); + float2 dy = ddy(uv * _FurCardTexture_TexelSize.zw); + float delta_max_sqr = max(dot(dx, dx), dot(dy, dy)); + + return max(0.0, 0.5 * log2(delta_max_sqr)); +} + +#include "CGI_FurLighting.cginc" + +void ApplyAlphaToCoverage(inout float4 finalColor, float2 uv) +{ + // rescale alpha by mip level (if not using preserved coverage mip maps) + finalColor.a *= 1 + max(0, CalcMipLevel(uv)) * .25; + // rescale alpha by partial derivative + finalColor.a = (finalColor.a - _FurClip) / fwidth(finalColor.a) + 0.5; +} + +fixed4 FurFag(g2f i): SV_Target +{ + float3 viewDir = normalize(_WorldSpaceCameraPos - i.worldPos); + + UNITY_SETUP_INSTANCE_ID(i); + float4 finalColor = 1; + finalColor.rgb = tex2D(_FurPattern, TRANSFORM_TEX(i.uv.zw, _FurPattern)).rgb; + finalColor.rgb *= tex2D(_FurCardTexture, TRANSFORM_TEX(i.uv.xy, _FurCardTexture)).rgb; + finalColor.a = tex2D(_FurCardAlphaTexture, TRANSFORM_TEX(i.uv.xy, _FurCardAlphaTexture)).r; + ApplyAlphaToCoverage(finalColor, i.uv.xy); + applyFurLighting(finalColor, i.uv, 1 /*attenuation*/, i.normal, viewDir, i.worldPos); + finalColor.rgb *= lerp(1, i.startToEndGradient, _FurAoStrength); + return finalColor; +}
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