public FluidSim(int width, int height, float scale)
{
Scale = 0.5f;
GWidth = (int)(width / scale) + 1;
GHeight = (int)(height / scale) + 1;
Grid = new GridCell[GHeight, GWidth];
GridCoeff = 1f;
GravityX = 0f;
GravityY = (9.81f / 0.5f) * (1f / 900f);
SDF = new DistanceField();
SDF.Create(256, GWidth, GHeight);
SDF.SubRect(0, 0, 128, 128);
SDF.AddCircle(64, 128, 10);
SDF.Blur();
}