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Shader "Spine/SkeletonShadow" {
Properties {
_ShadowColor("ShadowColor",Color) = (0,0,0,0.5)
_ShadowDdge("ShadowDege",range(0,1.507)) = 0
_ShadowCutD("_ShadowCutD",float) = 0.5
_ShadowHeightScale("_ShadowHeight",float) = 1
_Cutoff ("Shadow alpha cutoff", Range(0,1)) = 0.1
[NoScaleOffset] _MainTex ("Main Texture", 2D) = "black" {}
[Toggle(_STRAIGHT_ALPHA_INPUT)] _StraightAlphaInput("Straight Alpha Texture", Int) = 0
[HideInInspector] _StencilRef("Stencil Reference", Float) = 1.0
[HideInInspector][Enum(UnityEngine.Rendering.CompareFunction)] _StencilComp("Stencil Comparison", Float) = 8
[HideInInspector] _OutlineWidth("Outline Width", Range(0,8)) = 3.0
[HideInInspector] _OutlineColor("Outline Color", Color) = (1,1,0,1)
[HideInInspector] _OutlineReferenceTexWidth("Reference Texture Width", Int) = 1024
[HideInInspector] _ThresholdEnd("Outline Threshold", Range(0,1)) = 0.25
[HideInInspector] _OutlineSmoothness("Outline Smoothness", Range(0,1)) = 1.0
[HideInInspector][MaterialToggle(_USE8NEIGHBOURHOOD_ON)] _Use8Neighbourhood("Sample 8 Neighbours", Float) = 1
[HideInInspector] _OutlineOpaqueAlpha("Opaque Alpha", Range(0,1)) = 1.0
[HideInInspector] _OutlineMipLevel("Outline Mip Level", Range(0,3)) = 0
}
SubShader {
Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
Fog { Mode Off }
Cull Off
ZWrite Off
Blend One OneMinusSrcAlpha
Lighting Off
Stencil {
Ref[_StencilRef]
Comp[_StencilComp]
Pass Keep
}
Pass {
Name "FastShadow"
Blend SrcAlpha Zero
CGPROGRAM
#pragma shader_feature _ _STRAIGHT_ALPHA_INPUT
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
#include "CGIncludes/Spine-Common.cginc"
sampler2D _MainTex;
fixed _Cutoff;
float4 _ShadowColor;
float _ShadowDdge;
float _ShadowCutD;
float _ShadowHeightScale;
struct VertexInput {
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
float4 vertexColor : COLOR;
};
struct VertexOutput {
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
float4 vertexColor : COLOR;
};
VertexOutput vert (VertexInput v) {
VertexOutput o;
float4 vt = v.vertex;
float4 vtn;
vt.y *= _ShadowHeightScale;
vtn.x = vt.x + vt.y * _ShadowCutD;
vtn.y = cos(_ShadowDdge) * vt.y;
vtn.z = sin(_ShadowDdge) * vt.y;
vtn.w = vt.w;
o.pos = UnityObjectToClipPos(vtn);
o.uv = v.uv;
o.vertexColor = PMAGammaToTargetSpace(v.vertexColor);
return o;
}
float4 frag (VertexOutput i) : SV_Target {
float4 texColor = tex2D(_MainTex, i.uv);
#if defined(_STRAIGHT_ALPHA_INPUT)
texColor.rgb *= texColor.a;
#endif
float4 shadowColor = _ShadowColor;
clip(texColor.a * i.vertexColor.a - 0.01);
return shadowColor;
}
ENDCG
}
Pass {
Name "Normal"
CGPROGRAM
#pragma shader_feature _ _STRAIGHT_ALPHA_INPUT
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
#include "CGIncludes/Spine-Common.cginc"
sampler2D _MainTex;
struct VertexInput {
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
float4 vertexColor : COLOR;
};
struct VertexOutput {
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
float4 vertexColor : COLOR;
};
VertexOutput vert (VertexInput v) {
VertexOutput o;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = v.uv;
o.vertexColor = PMAGammaToTargetSpace(v.vertexColor);
return o;
}
float4 frag (VertexOutput i) : SV_Target {
float4 texColor = tex2D(_MainTex, i.uv);
#if defined(_STRAIGHT_ALPHA_INPUT)
texColor.rgb *= texColor.a;
#endif
return (texColor * i.vertexColor);
}
ENDCG
}
Pass {
Name "Caster"
Tags { "LightMode"="ShadowCaster" }
Offset 1, 1
ZWrite On
ZTest LEqual
Fog { Mode Off }
Cull Off
Lighting Off
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma multi_compile_shadowcaster
#pragma fragmentoption ARB_precision_hint_fastest
#include "UnityCG.cginc"
sampler2D _MainTex;
fixed _Cutoff;
struct VertexOutput {
V2F_SHADOW_CASTER;
float4 uvAndAlpha : TEXCOORD1;
};
VertexOutput vert (appdata_base v, float4 vertexColor : COLOR) {
VertexOutput o;
o.uvAndAlpha = v.texcoord;
o.uvAndAlpha.a = vertexColor.a;
TRANSFER_SHADOW_CASTER(o)
return o;
}
float4 frag (VertexOutput i) : SV_Target {
fixed4 texcol = tex2D(_MainTex, i.uvAndAlpha.xy);
clip(texcol.a * i.uvAndAlpha.a - _Cutoff);
SHADOW_CASTER_FRAGMENT(i)
}
ENDCG
}
}
CustomEditor "SpineShaderWithOutlineGUI"
}
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我们可以通过修改dll库源代码（当然是需要有源码，或者已经提供配套的pdb文件）编译器选项解决这个问题。调试信息选择可移植，如下图：
断点调试截图：
