一、内置渲染管线Shader
Shader"Custom/ImageRoll"
{Properties {_MainTex ("Main Tex", 2D) = "white" {}_Width ("Width", float) = 0.5_Distance ("Distance", float) = 0}SubShader {Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}Pass {Tags { "LightMode"="ForwardBase" }
ZTest offZWrite OffBlend SrcAlpha
OneMinusSrcAlphaCGPROGRAM#pragma vertex vert #pragma fragment frag
#include "UnityCG.cginc"sampler2D _MainTex;
float _Width;
float _Distance;struct a2v
{float4 vertex : POSITION;float2 texcoord : TEXCOORD0;
};struct v2f
{float4 pos : SV_POSITION;float2 uv : TEXCOORD0;
};v2f vert(a2v v)
{v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.uv.x = v.texcoord.x;o.uv.y = v.texcoord.y;return o;
}fixed4 frag(v2f i) : SV_Target
{i.uv.x = frac(i.uv.x * _Width + _Distance);fixed4 c = tex2D(_MainTex, i.uv);return c;
}ENDCG} }
FallBack"Transparent/VertexLit"
}
二、URP渲染管线Shader
Shader "Custom/ImageRollURP"{Properties{_MainTex("Texture", 2D) = "white" {}_Distance("Distance", Float) = 0}SubShader{Tags { "RenderType"="Transparent" "Queue"="Transparent" }LOD 100Pass{HLSLPROGRAM#pragma vertex vert#pragma fragment frag#pragma multi_compile_local _ DISTANCE_ON#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"struct Attributes{float4 position : POSITION;float2 uv : TEXCOORD0;};struct Varyings{float4 position : SV_POSITION;float2 uv : TEXCOORD0;};float _Distance;Varyings vert(Attributes IN){Varyings OUT;OUT.position = TransformObjectToHClip(IN.position.xyz);OUT.uv = IN.uv;return OUT;}sampler2D _MainTex;float4 _MainTex_ST;half4 frag(Varyings IN) : SV_Target{float2 uv = IN.uv;uv.x = frac(uv.x + _Distance);half4 c = tex2D(_MainTex, uv);return c;}ENDHLSL}}FallBack "Diffuse"
}
三、代码控制
using UnityEngine;public class ImageRoll : MonoBehaviour
{public float speed = 0.1f;private Material mtl;float distance;// Use this for initializationvoid Start(){mtl = GetComponent<SpriteRenderer>().material;distance = 0;}// Update is called once per framevoid Update(){distance += speed * Time.deltaTime;mtl.SetFloat("_Distance", distance);}
}
四、效果展示
