[Community Project] WIP Weather & Water Shader

[anonymous_user_2793493e1 (anonymous_user_2793493e)]

@;507332

Like I said… you can’t do all the math on the CPU because not only you would need to pass thousands of vector parameters (one per vertex) which is ridiculous and not possible but also doing the calculations on the GPU is a lot faster.

Code is not Formula? With features to Rotate?

If I plug the result of code on a Displacement pin inside material, the plane will not have ONE WAVE?

FVector AOceanManager::CalculateGerstnerWaveVector(float rotation, float waveLength, float amplitude, float steepness, const FVector2D& direction, const FVector& position, float time, FWaveCache& InWaveCache, bool CalculateXY, bool CalculateZ) const
{
	float frequency = (2 * PI) / waveLength;

	FVector dir;
	if (!InWaveCache.GetDir(rotation, direction, &dir))
	{
		dir = FVector(direction.X, direction.Y, 0);
		dir = dir.RotateAngleAxis(rotation * 360, FVector(0, 0, 1));
		dir = dir.GetSafeNormal();
		InWaveCache.SetDir(rotation, direction, dir);
	}

	float wavePhase = frequency * FVector::DotProduct(dir, position) + time;
	float c = 0, s = 0, QA = 0;

	//FMath::SinCos(&s, &c, wavePhase);

	if (CalculateXY)
	{
		c = FMath::Cos(wavePhase);
		QA = steepness * amplitude;
	}

	if (CalculateZ)
	{
		s = FMath::Sin(wavePhase);
	}

	return FVector(QA * dir.X * c, QA * dir.Y * c, amplitude * s);
}