shader半透明材质，粒子顶点流控制UV滚动（笔记4）

Shader "Shader Forge/Test01" {
    Properties {
        _MainTex ("Main Tex", 2D) = "white" {}
        [HideInInspector]_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
    }
    SubShader {
        Tags {
            "IgnoreProjector"="True"
            "Queue"="Transparent"
            "RenderType"="Transparent"
        }
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            Blend One One
            ZWrite Off
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
           // #define UNITY_PASS_FORWARDBASE
            #include "UnityCG.cginc"
           // #pragma multi_compile_fwdbase
           // #pragma only_renderers d3d9 d3d11 glcore gles 
            #pragma target 3.0
           // uniform
			sampler2D _MainTex;
		//uniform
			float4 _MainTex_ST;
            struct VertexInput {
                float4 vertex : POSITION;
                float2 texcoord0 : TEXCOORD0;
                float4 texcoord1 : TEXCOORD1;
                fixed4 vertexColor : COLOR;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                float4 uv1 : TEXCOORD1;
                fixed4 vertexColor : COLOR;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o;
                o.uv0 = v.texcoord0;
                o.uv1 = v.texcoord1;
                o.vertexColor = v.vertexColor;
                o.pos = UnityObjectToClipPos( v.vertex );
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
////// Lighting:
////// Emissive:
                float2 uv = float2((i.uv0.x+i.uv1.x),i.uv0.y);//i.uv0.x跟i.uv0.r都一样，为什么  shaderLab里面xyzw  对应rgba
                float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(uv, _MainTex));
                float3 emissive = (i.vertexColor.rgb*_MainTex_var.rgb);
                //float3 finalColor = emissive;
                return fixed4(emissive,(i.vertexColor.a*_MainTex_var.a));
            }
            ENDCG
        }
    }
    FallBack "Diffuse"
    CustomEditor "ShaderForgeMaterialInspector"
}