Shader——通过修改UV坐标实现纹理贴图的滚动

作者：追风剑情发布于：2015-9-5 12:05 分类：Shader

Shader "Custom/UVMove" {
	Properties {
		_MainTint ("Diffuse Tint", Color) = (1,1,1,1)
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_ScrollXSpeed ("X Scroll Speed", Range(0, 10)) = 2
		_ScrollYSpeed ("Y Scroll Speed", Range(0, 10)) = 2
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200
		
		CGPROGRAM
		#pragma surface surf Lambert
 
		sampler2D _MainTex;
		fixed4 _MainTint;
		fixed _ScrollXSpeed;
		fixed _ScrollYSpeed;
 
		struct Input {
			float2 uv_MainTex;
		};
 
		void surf (Input IN, inout SurfaceOutput o) {
			fixed2 scrolledUV = IN.uv_MainTex;
			fixed xScrollValue = _ScrollXSpeed * _Time;
			fixed yScrollValue = _ScrollYSpeed * _Time;
			
			scrolledUV += fixed2(xScrollValue, yScrollValue);
			
			half4 c = tex2D (_MainTex, scrolledUV);
			o.Albedo = c.rgb * _MainTint;
			o.Alpha = c.a;
		}
		ENDCG
	} 
	FallBack "Diffuse"
}