unity shader实现玻璃折射效果

本文实例为大家分享了unity shader实现玻璃折射的具体代码，供大家参考，具体内容如下

Shader "Unlit/render_reflect"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
}
SubShader
{
Tags {"Queue" = "Transparent" "RenderType"="Opaque" }
LOD 100
GrabPass{"_ScreenTex"}
Pass
{
 CGPROGRAM
 #pragma vertex vert
 #pragma fragment frag
 // make fog work
 #pragma multi_compile_fog

#include "UnityCG.cginc"
#include "Lighting.cginc"
#include "AutoLight.cginc"
 struct appdata
 {
 float4 vertex : POSITION;
 float2 uv : TEXCOORD0;
 };

struct v2f
 {
 float4 uv : TEXCOORD0;
 float2 uv2 : TEXCOORD1;
 float4 vertex : SV_POSITION;
 };

sampler2D _MainTex;
 float4 _MainTex_ST;
 sampler2D _ScreenTex;
 v2f vert (appdata v)
 {
 v2f o;
 o.vertex = UnityObjectToClipPos(v.vertex);
 o.uv2 = TRANSFORM_TEX(v.uv, _MainTex);
 o.uv = ComputeGrabScreenPos(o.vertex);
 //o.uv.x = 1 - o.uv.x;
 return o;
 }

fixed4 frag (v2f i) : SV_Target
 {
 // sample the texture
 i.uv.xy += float2(0.1,0.1);
 fixed4 fra = tex2D(_ScreenTex, i.uv.xy/i.uv.w);
 fixed4 fle = tex2D(_MainTex, i.uv2);
 // apply fog
 return lerp(fra, fle, 0.2);
 }
 ENDCG
}
}
}

来源：https://blog.csdn.net/u013749051/article/details/86292319