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135 changes: 135 additions & 0 deletions
135
ShaderLib_2022/Assets/ShaderLib/Character_StarRail/SIH_StarRailDrawOutlinePass.hlsl
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| #ifndef SIH_STARRAIL_DRAWOUTLINE_PASS_INCLUDED | ||
| #define SIH_STARRAIL_DRAWOUTLINE_PASS_INCLUDED | ||
|
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| // ------------------------------------- | ||
| // 方法 | ||
| // 根据相机距离调整描边宽度 | ||
| float GetCameraFOV() | ||
| { | ||
| //https://answers.unity.com/questions/770838/how-can-i-extract-the-fov-information-from-the-pro.html | ||
| float t = unity_CameraProjection._m11; | ||
| float Rad2Deg = 180 / 3.1415; | ||
| float fov = atan(1.0f / t) * 2.0 * Rad2Deg; | ||
| return fov; | ||
| } | ||
| float ApplyOutlineDistanceFadeOut(float inputMulFix) | ||
| { | ||
| //make outline "fadeout" if character is too small in camera's view | ||
| return saturate(inputMulFix); | ||
| } | ||
| float GetOutlineCameraFovAndDistanceFixMultiplier(float positionVS_Z) | ||
| { | ||
| float cameraMulFix; | ||
| if(unity_OrthoParams.w == 0) | ||
| { | ||
| //////////////////////////////// | ||
| // Perspective camera case | ||
| //////////////////////////////// | ||
|
|
||
| // keep outline similar width on screen accoss all camera distance | ||
| cameraMulFix = abs(positionVS_Z); | ||
|
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| // can replace to a tonemap function if a smooth stop is needed | ||
| cameraMulFix = ApplyOutlineDistanceFadeOut(cameraMulFix); | ||
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| // keep outline similar width on screen accoss all camera fov | ||
| cameraMulFix *= GetCameraFOV(); | ||
| } | ||
| else | ||
| { | ||
| //////////////////////////////// | ||
| // Orthographic camera case | ||
| //////////////////////////////// | ||
| float orthoSize = abs(unity_OrthoParams.y); | ||
| orthoSize = ApplyOutlineDistanceFadeOut(orthoSize); | ||
| cameraMulFix = orthoSize * 50; // 50 is a magic number to match perspective camera's outline width | ||
| } | ||
|
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| return cameraMulFix * 0.00005; // mul a const to make return result = default normal expand amount WS | ||
| } | ||
|
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| // ------------------------------------- | ||
| // 基本结构体输入 | ||
| struct Attributes | ||
| { | ||
| float4 positionOS : POSITION; | ||
| float3 normalOS : NORMAL; | ||
| float4 tangentOS : TANGENT; | ||
| float4 color : COLOR; | ||
| float2 texcoord : TEXCOORD0; | ||
| }; | ||
|
|
||
| // ------------------------------------- | ||
| // 基本结构体输出 | ||
| struct Varyings | ||
| { | ||
| float2 uv : TEXCOORD0; | ||
| float fogFactor : TEXCOORD1; | ||
| float4 color : TEXCOORD2; | ||
| float4 positionCS : SV_POSITION; | ||
| }; | ||
|
|
||
| // ------------------------------------- | ||
| // 基本顶点着色器 | ||
| Varyings StarRailPassVertex(Attributes input) | ||
| { | ||
| Varyings output = (Varyings)0; | ||
|
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| VertexPositionInputs positionInputs = GetVertexPositionInputs(input.positionOS.xyz); | ||
| VertexNormalInputs normalInputs = GetVertexNormalInputs(input.normalOS, input.tangentOS); | ||
|
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| float width = _OutlineWidth; | ||
| width *= GetOutlineCameraFovAndDistanceFixMultiplier(positionInputs.positionVS.z); // 根据相机距离调整描边宽度 | ||
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| float3 positionWS = positionInputs.positionWS; | ||
| #if _OUTLINE_VERTEX_COLOR_SMOOTH_NORMAL | ||
| float3x3 tbn = float3x3(normalInputs.tangentWS, normalInputs.bitangentWS, normalInputs.normalWS); | ||
| positionWS += mul(input.color.rgb * 2 - 1, tbn) * width; | ||
| #else | ||
| positionWS += normalInputs.normalWS * width; | ||
| #endif | ||
|
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| output.uv = TRANSFORM_TEX(input.texcoord, _BaseMap); | ||
| output.fogFactor = ComputeFogFactor(positionInputs.positionCS.z); | ||
| output.positionCS = TransformWorldToHClip(positionWS); | ||
| return output; | ||
| } | ||
|
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||
| // ------------------------------------- | ||
| // 基本片元着色器 | ||
| float4 StarRailPassFragment(Varyings input) : SV_Target | ||
| { | ||
| float3 coolRamp = 0; | ||
| float3 warmRamp = 0; | ||
| #if _AREA_HAIR | ||
| float2 outlineUV = float2(0, 0.5); | ||
| coolRamp = SAMPLE_TEXTURE2D(_HairCoolRamp, sampler_HairCoolRamp, outlineUV).rgb; | ||
| warmRamp = SAMPLE_TEXTURE2D(_HairWarmRamp, sampler_HairWarmRamp, outlineUV).rgb; | ||
| #elif _AREA_UPPERBODY || _AREA_LOWERBODY | ||
| float4 lightMap = 0; | ||
| #if _AREA_UPPERBODY | ||
| lightMap = SAMPLE_TEXTURE2D(_UpperBodyLightMap, sampler_UpperBodyLightMap, input.uv); | ||
| #elif _AREA_LOWERBODY | ||
| lightMap = SAMPLE_TEXTURE2D(_LowerBodyLightMap, sampler_LowerBodyLightMap, input.uv); | ||
| #endif | ||
| float materialEnum = lightMap.a; | ||
| float materialEnumOffset = materialEnum + 0.0425; | ||
| float outlineUVy = lerp(materialEnumOffset, materialEnumOffset + 0.5 > 1 ? materialEnumOffset + 0.5 - 1 : materialEnumOffset + 0.5, fmod((round(materialEnumOffset/0.0625) - 1)/2, 2)); | ||
| float2 outlineUV = float2(0, outlineUVy); | ||
| coolRamp = SAMPLE_TEXTURE2D(_BodyCoolRamp, sampler_BodyCoolRamp, outlineUV).rgb; | ||
| warmRamp = SAMPLE_TEXTURE2D(_BodyWarmRamp, sampler_BodyWarmRamp, outlineUV).rgb; | ||
| #elif _AREA_FACE | ||
| float2 outlineUV = float2(0, 0.0625); | ||
| coolRamp = SAMPLE_TEXTURE2D(_BodyCoolRamp, sampler_BodyCoolRamp, outlineUV).rgb; | ||
| warmRamp = SAMPLE_TEXTURE2D(_BodyWarmRamp, sampler_BodyWarmRamp, outlineUV).rgb; | ||
| #endif | ||
|
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| float3 ramp = lerp(coolRamp, warmRamp, 0.5); | ||
| float3 albedo = pow(saturate(ramp), _OutlineGamma);; | ||
|
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| float4 color = float4(albedo, 1); | ||
| color.rgb = MixFog(color.rgb, input.fogFactor); | ||
|
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| return color; | ||
| } | ||
| #endif |
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ShaderLib_2022/Assets/ShaderLib/Character_StarRail/SIH_StarRailDrawOutlinePass.hlsl.meta
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