The water's waves (render.WaveSpectrum, shaders/wave_modulate.frag, shaders/wave_unpack.frag, D42) are ported from
GodotOceanWaves (https://github.com/2Retr0/GodotOceanWaves, assets/shaders/compute/spectrum_compute.glsl,
spectrum_modulate.glsl, fft_unpack.glsl, assets/water/wave_generator.gd): JONSWAP's spectrum and its parameters for
the wind and the fetch, the TMA's attenuation in shallow water, Hasselmann's spreading, the spectrum turned in time
and its fields packed two to a complex number, the slopes' choppy correction, the foam from the Jacobian. Changed:
the spectrum made on the CPU, the fields as fragment passes, the frequencies rounded to a period. GodotOceanWaves is
licensed under the MIT License, which follows.

MIT License

Copyright (c) 2024 Ethan Truong

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