init

Assets/Particles/Muzzle/test_Shader.shader

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+Shader "Unlit/channelModulation_Shader"
+{
+    Properties
+    {
+        _MainTex ("Texture", 2D) = "white" {}
+		[HDR]
+		_Color("Color1", Color)=(1, 0, 0, 0)
+		[HDR]
+		_Color2("Color2", Color)=(1, 0, 0, 0)
+		_AlphaOffset("AlphaOffset", Vector)=(1, 0, 0, 0)
+		_Tiling("Tiling", Float)=1
+		_AlphaRotSpeed("AlphaRotSpeed", Float)=0
+    }
+    SubShader
+    {
+        Tags { "RenderType"="Transparent" "Queue"="Transparent" }
+		Cull Off
+		Blend SrcAlpha One
+		ZWrite Off
+        LOD 100
+
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            // make fog work
+            #pragma multi_compile_fog
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float4 uv : TEXCOORD0;
+				float4 vertexColor : COLOR;
+            };
+
+            struct v2f
+            {
+                float2 uv : TEXCOORD0;
+				float age : TEXCOORD1;
+				float custom1 : TEXCOORD2;
+                UNITY_FOG_COORDS(1)
+                float4 vertex : SV_POSITION;
+				float4 vertexColor : COLOR;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+
+			float4 _Color;
+			float4 _Color2;
+			float _Tiling;
+			float2 _AlphaOffset;
+			float _AlphaRotSpeed;
+
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+				o.vertexColor = v.vertexColor;
+                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+				o.age = v.uv.z;
+				o.custom1 = v.uv.w;
+                UNITY_TRANSFER_FOG(o,o.vertex);
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+                fixed4 tex = tex2D(_MainTex, (i.uv-0.5f)*float2(_Tiling, _Tiling)+0.5f);
+				float2 alphaUV = 0.5f+(i.uv - 0.5f)*((1-i.custom1.xx)*15);
+
+				float rotAngle = _AlphaRotSpeed * _Time.y;
+				float2x2 mat1=float2x2(cos(rotAngle), -sin(rotAngle), sin(rotAngle), cos(rotAngle));
+				float2x2 mat2=float2x2(cos(-rotAngle), -sin(-rotAngle), sin(-rotAngle), cos(-rotAngle));
+				float2 alphaRotatedUV1 = 0.5 + mul(mat1, alphaUV - 0.5);
+				float2 alphaRotatedUV2 = 0.5 + mul(mat2, alphaUV - 0.5);
+
+                fixed4 texAlpha1 = tex2D(_MainTex, alphaRotatedUV1);
+                fixed4 texAlpha2 = tex2D(_MainTex, alphaRotatedUV2);
+				
+				
+				fixed3 col = lerp(_Color2.rgb, _Color.rgb ,tex.g) + fixed3(1, 1, 1)*tex.r;
+				float alpha = (tex.r + tex.g)*i.vertexColor.a*(1 - (texAlpha1.b*texAlpha2.b));
+				
+                return fixed4(col.rgb*i.vertexColor.rgb, ceil(alpha)*i.vertexColor.a);
+            }
+            ENDCG
+        }
+    }
+}