<Shader> 最终版本的水纹效果

来源：互联网发布：淘宝培训机构编辑：程序博客网时间：2024/05/17 03:02
Shader "Custom/RippleShader"{    Properties    {//      _Color("Base Color", Color) = (1,1,1,1)        _MainTex("Base(RGB)", 2D) = "white" {}        _NoiseTex ("Wave Noise", 2D) = "white" {}//噪波贴图        _Color ("Tint", Color) = (1,1,1,1)        _Indentity ("Indentity", float) = 0.1//表示水波的扭曲强度        _SpeedX ("WaveSpeedX", float) = 0.08//噪波贴图延X方向的移动速度        _SpeedY ("WaveSpeedY", float) = 0.04//噪波贴图延Y方向的移动速度        _AlphaFadeIn ("AlphaFadeIn", float) = 0.0//水波的淡入位置        _AlphaFadeOut ("AlphaFadeOut", float) = 1.0//水波的淡出位置        _TwistFadeIn ("TwistFadeIn", float) = 1.0//扭曲的淡入位置        _TwistFadeOut ("TwistFadeOut", float) = 1.01//扭曲的淡出位置        _TwistFadeInIndentity ("TwistFadeInIndentity", float) = 1.0//扭曲的淡入强度        _TwistFadeOutIndentity ("TwistFadeOutIndentity", float) = 1.0//扭曲的淡出强度    }    SubShader    {        tags{"Queue" = "Transparent" "RenderType" = "Transparent" "IgnoreProjector" = "True"}        Blend SrcAlpha OneMinusSrcAlpha        Pass        {            CGPROGRAM            #pragma vertex vert            #pragma fragment frag            #include "UnityCG.cginc"//          float4 _Color;            sampler2D _MainTex;            sampler2D _NoiseTex;            fixed4 _Color;            half _Indentity;            half _SpeedX;            half _SpeedY;            float _AlphaFadeIn;            float _AlphaFadeOut;            half _TwistFadeIn;            half _TwistFadeOut;            fixed _TwistFadeInIndentity;            fixed _TwistFadeOutIndentity;            struct v2f            {                float4 pos:POSITION;                float4 uv:TEXCOORD0;                float4 color:COLOR;            };            struct appdata{                float4 vertex : POSITION;                float4 texcoord : TEXCOORD;                float4 color : COLOR;            };            v2f vert(appdata v)            {                v2f o;                o.pos = mul(UNITY_MATRIX_MVP, v.vertex);                o.uv = v.texcoord;                o.color = v.color;                return o;            }            half4 frag(v2f i):COLOR            {                //对淡入强度和淡出强度的插值                  fixed fadeT = saturate((_TwistFadeOut - i.uv.y) / (_TwistFadeOut - _TwistFadeIn));                float2 tuv = (i.uv - float2(0.5, 0)) * fixed2(lerp(_TwistFadeOutIndentity, _TwistFadeInIndentity, fadeT), 1) + float2(0.5, 0);                //计算噪波贴图的RG值，得到扭曲UV，                float2 waveOffset = (tex2D(_NoiseTex, i.uv.xy + float2(0, _Time.y * _SpeedY)).rg + tex2D(_NoiseTex, i.uv.xy + float2(_Time.y * _SpeedX, 0)).rg) - 1;                float2 ruv = float2(i.uv.x, 1 - i.uv.y) + waveOffset * _Indentity;                //使用扭曲UV对纹理采样                float4 c = tex2D (_MainTex, ruv);                //对淡入Alpha和淡出Alpha的插值                fixed fadeA = saturate((_AlphaFadeOut - ruv.y) / (_AlphaFadeOut - _AlphaFadeIn));                c = c * _Color * i.color * fadeA;                clip (c.a - 0.01);                return c;            }            ENDCG        }    }}
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