English Amiga Board - View Single Post

Daedalus · 06 March 2018, 13:34

Wow... I knew the Zones were slow, but that's very slow! I can only guess that it's doing some sort of full mathematical analysis of the zone, instead of taking easy shortcuts. RectsHit is a good alternative, and an even simpler version just for a single pixel might avoid some overheads within RectsHit for dealing with two rectangles:

Code:

If x >= zonex1
  If x <= zonex2
    If y >= zoney1
      If y <= zoney2
        collision = True
      End If
    End If
  End If
End If

Longer code but might be quicker than RectsHit (though I haven't tested it). It could be put in a macro for speed and neatness, and the x and y checks could be swapped if the zone is very tall and narrow for more improved speed, as it's less likely to have to check all sides.

06 March 2018, 13:34	#20
Daedalus Registered User Join Date: Jun 2009 Location: Dublin, then Glasgow Posts: 6,369	Wow... I knew the Zones were slow, but that's very slow! I can only guess that it's doing some sort of full mathematical analysis of the zone, instead of taking easy shortcuts. RectsHit is a good alternative, and an even simpler version just for a single pixel might avoid some overheads within RectsHit for dealing with two rectangles: Code: If x >= zonex1 If x <= zonex2 If y >= zoney1 If y <= zoney2 collision = True End If End If End If End If Longer code but might be quicker than RectsHit (though I haven't tested it). It could be put in a macro for speed and neatness, and the x and y checks could be swapped if the zone is very tall and narrow for more improved speed, as it's less likely to have to check all sides.