public ParticleLayer(MPos bounds)
{
this.bounds = new MPos((int)Math.Ceiling(bounds.X / (float)SectorSize), (int)Math.Ceiling(bounds.Y / (float)SectorSize));
sectors = new ParticleSector[this.bounds.X, this.bounds.Y];
for (var x = 0; x < this.bounds.X; x++)
{
for (var y = 0; y < this.bounds.Y; y++)
{
sectors[x, y] = new ParticleSector(new MPos(x, y));
}
}
}
ParticleSector[] getSectors(CPos topleft, CPos botright)
{
var pos1 = new MPos((int)Math.Clamp(Math.Floor(topleft.X / 4096f), 0, bounds.X - 1), (int)Math.Clamp(Math.Floor(topleft.Y / 4096f), 0, bounds.Y - 1));
var pos2 = new MPos((int)Math.Clamp(Math.Ceiling(botright.X / 4096f), 0, bounds.X - 1), (int)Math.Clamp(Math.Ceiling(botright.Y / 4096f), 0, bounds.Y - 1));
var sectors = new ParticleSector[(pos2.X - pos1.X + 1) * (pos2.Y - pos1.Y + 1)];
var i = 0;
for (var x = pos1.X; x < pos2.X + 1; x++)
{
for (var y = pos1.Y; y < pos2.Y + 1; y++)
{
sectors[i++] = this.sectors[x, y];
}
}
return(sectors);
}