Shader "MyShader/FlowingLight" {
    Properties {
        _MainTex ("MainTex", 2D) = "white" {}
        _Color ("Color", Color) = (0.5,0.5,0.5,1)
        _Brighteen ("Brighteen", Range(0, 10)) = 1
        _Uspeed ("U speed", Range(-10, 10)) = 0
        _VSpeed ("V Speed", Range(-10, 10)) = 1
    }
    SubShader {
        Tags {
            "IgnoreProjector"="True"
            "Queue"="Transparent"
            "RenderType"="Transparent"
        }
        LOD 200
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            Blend SrcAlpha One
            Cull Off
            ZWrite Off
            Fog { Mode off }
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"
            #pragma multi_compile_fwdbase 
            #pragma target 3.0

            uniform float4 _TimeEditor;
            uniform sampler2D _MainTex; uniform fixed4 _MainTex_ST;
            uniform fixed4 _Color;
            uniform fixed _Brighteen;
            uniform half _Uspeed;
            uniform half _VSpeed;

            struct VertexInput {
                float4 vertex : POSITION;
                float2 texcoord0 : TEXCOORD0;
                fixed4 vertexColor : COLOR;
            };

            struct VertexOutput {
                float4 pos : SV_POSITION;
                float2 uv0 : TEXCOORD0;
                fixed4 vertexColor : COLOR;
            };

            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.vertexColor = v.vertexColor * _Color;
                o.pos = UnityObjectToClipPos(v.vertex );

                float t = _Time.g + _TimeEditor.g;
                float2 uv = v.texcoord0 + float2(_Uspeed,_VSpeed) * t;
                o.uv0 = TRANSFORM_TEX(uv, _MainTex);

                return o;
            }

            fixed4 frag(VertexOutput i) : SV_Target {
                fixed4 mainColor = tex2D(_MainTex, i.uv0);
                fixed3 emissive = ((_Brighteen*mainColor.rgb)*i.vertexColor.rgb);
                return fixed4(emissive * mainColor.a * i.vertexColor.a, 1);
            }
            ENDCG
        }
    }

}