#pragma clang diagnostic ignored "-Wmissing-prototypes"
    
    #include <metal_stdlib>
    #include <simd/simd.h>
    
    using namespace metal;
    
    struct Locals
    {
        float4x4 u_proj;
        float4x4 u_view;
        float3 u_camera_pos;
    };
    
    struct main0_out
    {
        float4 Target0 [[color(0)]];
    };
    
    struct main0_in
    {
        float2 p_Uv [[user(locn0)]];
        float3 p_PosWorld [[user(locn1)]];
    };
    
    static inline __attribute__((always_inline))
    float3 F_Schlick(thread const float3& f0, thread const float3& f90, thread const float& theta)
    {
        return f0 + ((f90 - f0) * pow(1.0 - theta, 5.0));
    }
    
    fragment main0_out main0(main0_in in [[stage_in]], constant Locals& _157 [[buffer(0)]], texture2d<float> u_Texture [[texture(0)]], sampler u_Sampler [[sampler(0)]])
    {
        main0_out out = {};
        int2 dim = int2(512);
        float2 diff = float2(2.0 / float(dim.x), 2.0 / float(dim.y));
        float x0 = u_Texture.sample(u_Sampler, in.p_Uv, int2(-1, 0)).x;
        float x1 = u_Texture.sample(u_Sampler, in.p_Uv, int2(1, 0)).x;
        float z0 = u_Texture.sample(u_Sampler, in.p_Uv, int2(0, -1)).x;
        float z1 = u_Texture.sample(u_Sampler, in.p_Uv, int2(0, 1)).x;
        float3 na = normalize(float3(-diff.x, (x1 - x0) / 180.0, 0.0));
        float3 nb = normalize(float3(0.0, (z1 - z0) / 180.0, diff.y));
        float3 N = normalize(cross(na, nb));
        float depth = 1.0 - pow(fast::clamp((in.p_PosWorld.y + 10.0) / 50.0, 0.0, 1.5), 1.2000000476837158203125);
        float3 water_albedo = mix(float3(0.0, 0.86000001430511474609375, 0.790000021457672119140625), float3(0.02999999932944774627685546875, 0.07999999821186065673828125, 0.180000007152557373046875), float3(depth));
        float3 L = float3(0.98058068752288818359375, 0.19611613452434539794921875, 0.0);
        float3 V = normalize(_157.u_camera_pos - in.p_PosWorld);
        float3 H = normalize(L + V);
        float NdotV = fast::clamp(dot(N, V), 9.9999997473787516355514526367188e-05, 1.0);
        float NdotL = fast::clamp(dot(N, L), 9.9999997473787516355514526367188e-05, 1.0);
        float HdotV = fast::clamp(dot(H, V), 0.0, 1.0);
        float NdotH = fast::clamp(dot(N, H), 0.0, 1.0);
        float3 param = float3(0.039999999105930328369140625, 0.039999999105930328369140625, 0.070000000298023223876953125);
        float3 param_1 = float3(1.0);
        float param_2 = HdotV;
        float3 F = F_Schlick(param, param_1, param_2);
        out.Target0 = float4((water_albedo * fast::max(0.699999988079071044921875, NdotL)) * (float3(1.0) - F), 1.0);
        return out;
    }