//UNITY_SHADER_NO_UPGRADE
#ifndef WATER_OBJ_INCLUDE
#define WATER_OBJ_INCLUDE

#ifndef GET_TF_FROM_M
#define GET_TF_FROM_M(m) dot(float3(m[0].w, m[1].w, m[2].w),1)
#endif

inline float3 GetObjWaveDisplacement(float3 positionOS, float4 waterDir, float freq, float intensity, float factor)
{
    float3 positionWS = TransformObjectToWorld(positionOS);
    float objFreq = _Time.y * freq + positionWS.y ;
    float objPhase = objFreq + GET_TF_FROM_M(GetObjectToWorldMatrix()) * waterDir.w;

    float branchPhase = objPhase + dot(positionOS.xyz,1);

    float offset = sin(objPhase) + cos(branchPhase);
    
    return normalize(waterDir.xyz) * offset * factor * intensity;
}

void GGetObjWaveDisplacement_float(float3 positionOS, float4 waterDir, float freq, float intensity, float factor, out float3 Out)
{
    Out = GetObjWaveDisplacement(positionOS, waterDir, freq, intensity, factor);
}

#endif //WATER_OBJ_INCLUDE