public static IEnumerable <Actor> FindActorsInCircle(this World world, WPos origin, WRange r)
{
using (new PerfSample("FindUnitsInCircle"))
{
// Target ranges are calculated in 2D, so ignore height differences
var vec = new WVec(r, r, WRange.Zero);
var rSq = r.Range * r.Range;
return(world.FindActorsInBox(origin - vec, origin + vec).Where(
a => (a.CenterPosition - origin).HorizontalLengthSquared <= rSq));
}
}
public static IEnumerable <Actor> FindActorsInCircle(this World world, WPos origin, WRange r)
{
using (new PerfSample("FindUnitsInCircle"))
{
// Target ranges are calculated in 2D, so ignore height differences
var vec = new WVec(r, r, WRange.Zero);
var rSq = r.Range * r.Range;
return(world.FindActorsInBox(origin - vec, origin + vec).Where(a =>
{
var pos = a.CenterPosition;
var dx = (long)(pos.X - origin.X);
var dy = (long)(pos.Y - origin.Y);
return dx * dx + dy * dy <= rSq;
}));
}
}
public static IEnumerable <Actor> FindActorsInBox(this World world, CPos tl, CPos br)
{
return(world.FindActorsInBox(tl.TopLeft, br.BottomRight));
}
public static IEnumerable <Actor> FindActorsInBox(this World world, CPos tl, CPos br)
{
// TODO: Support diamond boxes for isometric maps?
return(world.FindActorsInBox(tl.TopLeft, br.BottomRight));
}