public void Set(VirtualGrid3Region <T> regionToSet)
{
List <VirtualGrid3Region <T> > newRegions = new List <VirtualGrid3Region <T> >();
foreach (VirtualGrid3Region <T> existingRegion in regions)
{
if (regionToSet.Contains(existingRegion))
{
continue;
}
if (existingRegion.Intersects(regionToSet, out VirtualGrid3Region <T> intersection))
{
newRegions.AddRange(existingRegion.Without(intersection));
}
else
{
newRegions.Add(existingRegion);
}
}
newRegions.Add(regionToSet);
this.regions = newRegions;
}
internal bool Intersects(VirtualGrid3Region <T> other, out VirtualGrid3Region <T> intersection)
{
Point3 lowerBounds = Point3.Max(this.LowerBounds, other.LowerBounds);
Point3 upperBounds = Point3.Min(this.UpperBounds, other.UpperBounds);
if (upperBounds.AllGreaterThanOrEqual(lowerBounds))
{
intersection = new VirtualGrid3Region <T>(lowerBounds, upperBounds);
return(true);
}
intersection = null;
return(false);
}
internal IEnumerable <VirtualGrid3Region <T> > Without(VirtualGrid3Region <T> subregion)
{
Point3[] ranges = new Point3[6];
ranges[0] = this.LowerBounds;
ranges[1] = subregion.LowerBounds - 1;
ranges[2] = subregion.LowerBounds;
ranges[3] = subregion.UpperBounds;
ranges[4] = subregion.UpperBounds + 1;
ranges[5] = this.UpperBounds;
for (int z = 0; z < 5; z += 2)
{
if (ranges[z].Z > ranges[z + 1].Z)
{
continue;
}
for (int y = 0; y < 5; y += 2)
{
if (ranges[y].Y > ranges[y + 1].Y)
{
continue;
}
for (int x = 0; x < 5; x += 2)
{
if (ranges[x].X > ranges[x + 1].X)
{
continue;
}
if (x != 2 || y != 2 || z != 2)
{
Point3 lowerBounds = new Point3(ranges[x].X, ranges[y].Y, ranges[z].Z);
Point3 upperBounds = new Point3(ranges[x + 1].X, ranges[y + 1].Y, ranges[z + 1].Z);
yield return(new VirtualGrid3Region <T>(lowerBounds, upperBounds, Value));
}
}
}
}
}
internal bool Contains(VirtualGrid3Region <T> other)
{
return(this.LowerBounds.AllLessThanOrEqual(other.LowerBounds) && this.UpperBounds.AllGreaterThanOrEqual(other.UpperBounds));
}