需要滾動的背景圖檔!!!! 需要設定圖檔的WrapMode為Repeat
shader 比較簡單 就是UV坐标做一個偏移 偏移的值保持在1以内就好了
Shader "Unlit/UIScrollingBackground"
{
Properties
{
_MainTex ("BaseTexture(RGB)", 2D) = "white" {}
_ScrollXBaseSpeed ("BaseSpeed", Float) = 1.0
}
SubShader
{
//如果是UI就需要下面這些東西
Tags
{
"Queue"="Transparent"
"IgnoreProjector"="True"
"RenderType"="Transparent"
"PreviewType"="Plane"
"CanUseSpriteAtlas"="True"
}
Lighting Off
ZWrite Off
ZTest [unity_GUIZTestMode]
Blend SrcAlpha OneMinusSrcAlpha
//到此結束 如果不是UI可以删掉這段
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
float4 vertex : SV_POSITION;
};
sampler2D _MainTex;
float4 _MainTex_ST;
float _ScrollXBaseSpeed;
v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex) + frac(float2(_ScrollXBaseSpeed, 0) * _Time.y);
return o;
}
fixed4 frag (v2f i) : SV_Target
{
// sample the texture
fixed4 col = tex2D(_MainTex, i.uv);
return col;
}
ENDCG
}
}
}