chore: checkpoint current workspace changes

docs/reference/NahidaUnity/Shaders/GenshinOutlinePass.hlsl

@@ -0,0 +1,81 @@
+#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
+
+struct Attributes
+{
+    float4 positionOS : POSITION;
+    float3 normalOS : NORMAL;
+    float4 tangentOS : TANGENT;
+    float4 color : COLOR;
+    float2 uv : TEXCOORD0;
+    float3 smoothNormal : TEXCOORD7;
+};
+
+struct Varyings
+{
+    float2 uv : TEXCOORD0;
+    float4 positionCS : SV_POSITION;
+};
+
+float GetOutlineWidth(float positionVS_Z)
+{
+    float fovFactor = 2.414 / UNITY_MATRIX_P[1].y;
+    float z = abs(positionVS_Z * fovFactor);
+
+    float4 params = _OutlineWidthParams;
+    float k = saturate((z - params.x) / (params.y - params.x));
+    float width = lerp(params.z, params.w, k);
+
+    return 0.01 * _OutlineWidth * width;
+}
+
+float4 GetOutlinePosition(VertexPositionInputs vertexInput, VertexNormalInputs normalInput, half4 vertexColor)
+{
+    float z = vertexInput.positionVS.z;
+    float width = GetOutlineWidth(z) * vertexColor.a;
+
+    half3 normalVS = TransformWorldToViewNormal(normalInput.normalWS);
+    normalVS = SafeNormalize(half3(normalVS.xy, 0.0));
+
+    float3 positionVS = vertexInput.positionVS;
+    positionVS += 0.01 * _OutlineZOffset * SafeNormalize(positionVS);
+    positionVS += width * normalVS;
+
+    float4 positionCS = TransformWViewToHClip(positionVS);
+    positionCS.xy += _ScreenOffset.zw * positionCS.w;
+
+    return positionCS;
+}
+
+Varyings OutlinePassVertex(Attributes input)
+{
+    VertexPositionInputs vertexInput = GetVertexPositionInputs(input.positionOS.xyz);
+    VertexNormalInputs normalInput = GetVertexNormalInputs(input.normalOS, input.tangentOS);
+
+    half3x3 tangentToWorld = half3x3(normalInput.tangentWS, normalInput.bitangentWS, normalInput.normalWS);
+    half3 normalTS = 2.0 * (input.smoothNormal - 0.5);
+    half3 normalWS = TransformTangentToWorld(normalTS, tangentToWorld, true);
+    normalInput.normalWS = lerp(normalInput.normalWS, normalWS, _UseSmoothNormal);
+
+    float4 positionCS = GetOutlinePosition(vertexInput, normalInput, input.color);
+
+    Varyings output = (Varyings)0;
+    output.uv = TRANSFORM_TEX(input.uv, _BaseMap);
+    output.positionCS = positionCS;
+
+    return output;
+}
+
+half4 OutlinePassFragment(Varyings input) : SV_TARGET
+{
+    half4 lightMap = SAMPLE_TEXTURE2D(_LightMap, sampler_LightMap, input.uv);
+    half material = lightMap.a;
+
+    half4 color = _OutlineColor5;
+    color = lerp(color, _OutlineColor4, step(0.2, material));
+    color = lerp(color, _OutlineColor3, step(0.4, material));
+    color = lerp(color, _OutlineColor2, step(0.6, material));
+    color = lerp(color, _OutlineColor, step(0.8, material));
+
+    return color;
+}