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| /** | |
| * \brief Returns positional offset for a given point as a result of summing 4 gerstner waves | |
| * \param positionWS point in world space | |
| * \param wavelengths wavelength of each of the 4 waves | |
| * \param amplitudes amplitudes of each of the 4 waves | |
| * \param directions direction of each of the 4 waves (each row = one direction). MUST BE NORMALIZED! | |
| * \param speed global speed multiplier. Individual wave speed depends on Wavelength | |
| * \param steepness Gerstner wave 'Steepness' parameter. Modulates the horizontal offset of points | |
| * \param normal returns the normal of given point. | |
| * \return positional offset of the given point |
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