[unity] SkeletonTint as optional shader.

spine-unity/Assets/spine-unity/Modules/Shaders.meta

@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 3e6a65e2576c5b74dabb05c3d3fc2ae4
+folderAsset: yes
+timeCreated: 1479258132
+licenseType: Free
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

spine-unity/Assets/spine-unity/Modules/Shaders/SkeletonTint.shader

@@ -0,0 +1,92 @@
+Shader "Spine/Skeleton Tint" {
+	Properties {
+		_Color ("Tint Color", Color) = (1,1,1,1)
+		_MainTex ("MainTex", 2D) = "black" {}
+		_Cutoff ("Shadow alpha cutoff", Range(0,1)) = 0.1
+	}
+
+	SubShader {
+		Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }
+		LOD 100
+
+		Fog { Mode Off }
+		Cull Off
+		ZWrite Off
+		Blend One OneMinusSrcAlpha
+		Lighting Off
+
+		Pass {
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			//#pragma multi_compile_fwdbase
+			#include "UnityCG.cginc"
+			uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
+			uniform float4 _Color;
+
+			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 = mul(UNITY_MATRIX_MVP, v.vertex);
+				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+				o.vertexColor = v.vertexColor * float4(_Color.rgb * _Color.a, _Color.a); // Combine a PMA version of _Color with vertexColor.
+				return o;
+			}
+
+			float4 frag (VertexOutput i) : COLOR {
+				return (tex2D(_MainTex, i.uv) * i.vertexColor);
+			}
+			ENDCG
+		}
+
+		Pass {
+			Name "Caster"
+			Tags { "LightMode"="ShadowCaster" }
+			Offset 1, 1
+
+			ZWrite On
+			ZTest LEqual
+
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			#pragma multi_compile_shadowcaster
+			#pragma fragmentoption ARB_precision_hint_fastest
+			#include "UnityCG.cginc"
+			struct v2f { 
+				V2F_SHADOW_CASTER;
+				float2 uv : TEXCOORD1;
+			};
+
+			uniform float4 _MainTex_ST;
+
+			v2f vert (appdata_base v) {
+				v2f o;
+				TRANSFER_SHADOW_CASTER(o)
+				o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
+				return o;
+			}
+
+			uniform sampler2D _MainTex;
+			uniform fixed _Cutoff;
+
+			float4 frag (v2f i) : COLOR {
+				fixed4 texcol = tex2D(_MainTex, i.uv);
+				clip(texcol.a - _Cutoff);
+				SHADOW_CASTER_FRAGMENT(i)
+			}
+			ENDCG
+		}
+	}
+}

spine-unity/Assets/spine-unity/Modules/Shaders/SkeletonTint.shader.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 522f03282fd79be47b306e2ef4b593fd
+ShaderImporter:
+  defaultTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

spine-unity/Assets/spine-unity/SkeletonExtensions.cs

@@ -174,7 +174,7 @@ namespace Spine.Unity {
 				va.ComputeWorldVertices(slot, floats);
 
 				Bone sb = slot.bone;
-				float bwx = sb.worldX, bwy = sb.worldY, ia, ib, ic, id;
+				float ia, ib, ic, id, bwx = sb.worldX, bwy = sb.worldY;
 				sb.GetWorldToLocalMatrix(out ia, out ib, out ic, out id);
 
 				for (int i = 0; i < bufferTargetSize; i++) {