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Shader "Hidden/VerticalScroll"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
}
CGINCLUDE
#include "UnityCG.cginc"
sampler2D _MainTex;
float _ScrollValue;
fixed4 frag (v2f_img i) : SV_Target
{
float u = i.uv.x;
float v = i.uv.y;
// 小数点部分だけをオフセットする
// fracは小数点だけを残す関数
v = frac(v + _ScrollValue);
return tex2D(_MainTex, float2(u, v));
}
ENDCG
SubShader
{
Pass
{
CGPROGRAM
#pragma vertex vert_img
#pragma fragment frag
ENDCG
}
}
}
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