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Shader "LearmZDTA/L14and16/Water" {     Properties {         _MainTex        ("颜色贴图", 2d) = "white"{}         _WarpTex        ("扰动图", 2d) = "gray"{}         _Speed          ("X：流速X Y：流速Y", vector) = (1.0, 1.0, 0.5, 1.0)         _Warp1Params    ("X：大小 Y：流速X Z：流速Y W：强度", vector) = (1.0, 1.0, 0.5, 1.0)         _Warp2Params    ("X：大小 Y：流速X Z：流速Y W：强度", vector) = (2.0, 0.5, 0.5, 1.0)     }     SubShader {         Tags {             "RenderType"="Opaque"         }         Pass {             Name "FORWARD"             Tags {                 "LightMode"="ForwardBase"             }                 CGPROGRAM             #pragma vertex vert             #pragma fragment frag             #include "UnityCG.cginc"             #pragma multi_compile_fwdbase_fullshadows             #pragma target 3.0             // 输入参数             uniform sampler2D _MainTex; uniform float4 _MainTex_ST;             uniform sampler2D _WarpTex;             uniform half2 _Speed;             uniform half4 _Warp1Params;             uniform half4 _Warp2Params;               struct VertexInput {                 float4 vertex : POSITION;                       float2 uv : TEXCOORD0;                       };               struct VertexOutput {                 float4 pos : SV_POSITION;                       float2 uv0 : TEXCOORD0;         // 采样Mask                 float2 uv1 : TEXCOORD1;         // 采样Noise1                 float2 uv2 : TEXCOORD2;         // 采样Noise2             };               VertexOutput vert (VertexInput v) {                 VertexOutput o = (VertexOutput)0;                     o.pos = UnityObjectToClipPos( v.vertex);                         o.uv0 = v.uv - frac(_Time.x * _Speed);  //主贴图水波纹也需要流动                     o.uv1 = v.uv * _Warp1Params.x - frac(_Time.x * _Warp1Params.yz);                     o.uv2 = v.uv * _Warp2Params.x - frac(_Time.x * _Warp2Params.yz);                 return o;             }               float4 frag(VertexOutput i) : COLOR {                 half3 var_Warp1 = tex2D(_WarpTex, i.uv1).rgb;      // 扰动1                 half3 var_Warp2 = tex2D(_WarpTex, i.uv2).rgb;      // 扰动2                 // 扰动混合                 half2 warp = (var_Warp1.xy - 0.5) * _Warp1Params.w +                              (var_Warp2.xy - 0.5) * _Warp2Params.w;                     //-0,5的原因，将(0,1)Remap到(-0.5,0.5)，让偏移可以负方向                   // 扰动UV                 float2 warpUV = i.uv0 + warp;                 // 采样MainTex                 half4 var_MainTex = tex2D(_MainTex, warpUV);                   return float4(var_MainTex.xyz, 1.0);             }             ENDCG         }     }     FallBack "Diffuse" }

 

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