worldSpaceWave

// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'

Shader "Unlit/SimpleWater"
{
    Properties
    {
        _Tint("Tint", Color) = (1, 1, 1, .5)
        _MainTex ("Main Texture", 2D) = "white" {}
        _NoiseTex("Extra Wave Noise", 2D) = "white" {}
        _Speed("Wave Speed", Range(0,1)) = 0.5
        _Amount("Wave Amount", Range(0,1)) = 0.5
        _Height("Wave Height", Range(0,1)) = 0.5
        _Foam("Foamline Thickness", Range(0,3)) = 0.5

    }
    SubShader
    {
        Tags { "RenderType"="Opaque"  "Queue" = "Transparent" }
        LOD 100
        Blend SrcAlpha OneMinusSrcAlpha

        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;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;
                float4 scrPos : TEXCOORD1;//
            };

            float4 _Tint;
            uniform sampler2D _CameraDepthTexture; //Depth Texture
            sampler2D _MainTex, _NoiseTex;//
            float4 _MainTex_ST;
            float _Speed, _Amount, _Height, _Foam;//

            v2f vert (appdata v)
            {
                v2f o;
                worldPos = mul (unity_ObjectToWorld, v.vertex);
                v.vertex.y += sin(_Time.z * _Speed + (worldPos.x * worldPos.z *_Amount)) * _Height;//movement
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                o.scrPos = ComputeScreenPos(o.vertex); // grab position on screen
                UNITY_TRANSFER_FOG(o,o.vertex);

                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture

                half4 col = tex2D(_MainTex, i.uv) * _Tint;// texture times tint;
                half depth = LinearEyeDepth(SAMPLE_DEPTH_TEXTURE_PROJ(_CameraDepthTexture, UNITY_PROJ_COORD(i.scrPos))); // depth
                half4 foamLine =1 - saturate(_Foam * (depth - i.scrPos.w));// foam line by comparing depth and screenposition
                col += foamLine * _Tint; // add the foam line and tint to the texture
                return col ;
            }
            ENDCG
        }
    }
}