Shader代码
顶点着色器实现水面的起伏效果
片元着色器实现波纹效果（没有运行，所以看上去是规律的黑色斑点。。。）
各种函数实现取自Unity官网对ShaderGraph的Node的解析
Properties { _MainTex ("Texture", 2D) = "white" {} _WaterSpeed("波浪起伏的速度", float) = 0.2 _WaterScale("波浪的范围", float) = 2 _RippleSpeed("波纹的速度",float) = 1 _RippleDensity("波纹的密度",float) = 1 _RippleRate("波纹的大小系数",float) = 1 _RippleColor("波纹的颜色",color) = (1,1,1,1) _WaveColor("海水的颜色",color) = (1,1,1,1) } SubShader { Tags { "RenderType"="Opaque" } LOD 100 Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag // make fog work #pragma multi_compile_fog #include "UnityCG.cginc" struct appdata { float4 vertex : POSITION; float2 uv : TEXCOORD0; float3 normal: NORMAL; }; struct v2f { float2 uv : TEXCOORD0; float4 vertex : SV_POSITION; float4 objPos:TEXCOORD1; float3 Objnormal: NORMAL; }; sampler2D _MainTex; float4 _MainTex_ST; float _WaterSpeed; float _WaterScale; float _RippleSpeed; float _RippleDensity; float _RippleRate; fixed4 _RippleColor; fixed4 _WaveColor; //Gradient Noise的函数,用于模型顶点的波动 float2 unity_gradientNoise_dir(float2 p) { p = p % 289; float x = (34 * p.x + 1) * p.x % 289 + p.y; x = (34 * x + 1) * x % 289; x = frac(x / 41) * 2 - 1; return normalize(float2(x - floor(x + 0.5), abs(x) - 0.5)); } float unity_gradientNoise(float2 p) { float2 ip = floor(p); float2 fp = frac(p); float d00 = dot(unity_gradientNoise_dir(ip), fp); float d01 = dot(unity_gradientNoise_dir(ip + float2(0, 1)), fp - float2(0, 1)); float d10 = dot(unity_gradientNoise_dir(ip + float2(1, 0)), fp - float2(1, 0)); float d11 = dot(unity_gradientNoise_dir(ip + float2(1, 1)), fp - float2(1, 1)); fp = fp * fp * fp * (fp * (fp * 6 - 15) + 10); return lerp(lerp(d00, d01, fp.y), lerp(d10, d11, fp.y), fp.x); } float Unity_GradientNoise_float(float2 UV, float Scale) { return unity_gradientNoise(UV * Scale) + 0.5; } v2f vert (appdata v) { v2f o; // o.vertex = UnityObjectToClipPos(v.vertex); o.uv = TRANSFORM_TEX(v.uv, _MainTex); o.objPos = v.vertex; o.Objnormal = v.normal; //偏移量=时间*波浪速度 float2 offsetVer = _Time.y * _WaterSpeed; //模型的顶点坐标 float2 waveuv = o.uv * float2(1, 1) + offsetVer; //模拟的是ShaderGraph的Gradient Noise节点的计算方式 float Gradient = Unity_GradientNoise_float(waveuv, _WaterScale); //计算出模型空间下波浪状顶点的坐标 half3 waveVertex = o.Objnormal * Gradient + o.objPos; o.vertex = UnityObjectToClipPos(waveVertex); return o; } //Radial ShearH函数方法 float2 Unity_RadialShear_float(float2 UV, float2 Center, float Strength, float2 Offset) { float2 delta = UV - Center; float delta2 = dot(delta.xy, delta.xy); float2 delta_offset = delta2 * Strength; return UV + float2(delta.y, -delta.x) * delta_offset + Offset; } //Voronoi函数 inline float2 unity_voronoi_noise_randomVector(float2 UV, float offset) { float2x2 m = float2x2(15.27, 47.63, 99.41, 89.98); UV = frac(sin(mul(UV, m)) * 46839.32); return float2(sin(UV.y * +offset) * 0.5 + 0.5, cos(UV.x * offset) * 0.5 + 0.5); } void Unity_Voronoi_float(float2 UV, float AngleOffset, float CellDensity,out float Out) { float2 g = floor(UV * CellDensity); float2 f = frac(UV * CellDensity); float t = 8.0; float3 res = float3(8.0, 0.0, 0.0); for (int y = -1; y <= 1; y++) { for (int x = -1; x <= 1; x++) { float2 lattice = float2(x, y); float2 offset = unity_voronoi_noise_randomVector(lattice + g, AngleOffset); float d = distance(lattice + offset, f); if (d < res.x) { res = float3(d, offset.x, offset.y); Out = res.x; //Cells = res.y; //return res.x; } } } //return 0; } fixed4 frag(v2f i) : SV_Target { //Radial Shear 径向剪切输出结果作为Voronoi的UV float2 Voruv = Unity_RadialShear_float(i.uv,float2(0.5,0.5),1,0); //Voronoi的Angle Offset=时间的Y*波纹速度 float VorAngOffset = _Time.y * _RippleSpeed; //Voronoi函数Out出来的float值 float Vornum; Unity_Voronoi_float(Voruv, VorAngOffset, _RippleDensity, Vornum); //FinColor=power(Vornum,_RippleRate)*_RippleColor,输出的最终颜色 fixed4 FinColor = pow(Vornum, _RippleRate) * _RippleColor; // fixed4 col = tex2D(_MainTex, i.uv); return FinColor+ _WaveColor; } ENDCG } } ShaderGraph节点