} = 0.5f; // 0-1, default 0.5
// this defines the tiling
public virtual int GetLumaTileIndexOfPixelPosInCell(int x, int y, Size cellSize)
{
vec2 posInCell01 = vec2.Init(x, y)
.add(.5f)// center in the pixel
.dividedBy(cellSize);
vec2 skewAmt = posInCell01.minus(.5f).multipliedBy(this.Rotation);
skewAmt.y = -skewAmt.y;
vec2 tile = posInCell01.add(skewAmt.yx());// which tile are we in (x=0,1, y=0,1)
ivec2 itile = tile.step(.5f);
int tileIdx = itile.x + itile.y * 2;
posInCell01 = posInCell01.minus(.5f).abs();
float m = posInCell01.x + posInCell01.y;
if (m < 1.0 / 3.0)
{
tileIdx = 4;// arbitrary number that looks good perceptually.
}
return(tileIdx);
}