Talk:GUI Collision Tutorial

Possible duplicate of Collision_detection_for_GUI's

Trappingnoobs (Writer) Have I done something bad? Good? Tell me on my talk page 15:51, 6 August 2011 (UTC)

That page is terrible

NXTBoy (talk • contribs)

18:41, 6 August 2011 (UTC)

Still, we have two pages for the same thing. :l

Trappingnoobs (Writer) Have I done something bad? Good? Tell me on my talk page 13:36, 7 August 2011 (UTC)

Sorry, I know what I wrote was terrible. :(

Also, how do you add one of those signatures you guys have? (Flurite)

Isn't the standard formula for detecting GUIs this?

function IsTouching(gui1, gui2)
	return gui1.AbsolutePosition.X + math.abs(math.floor(gui1.AbsoluteSize.X)) > gui2.AbsolutePosition.X and
	gui2.AbsolutePosition.X + math.abs(math.floor(gui2.AbsoluteSize.X)) > gui1.AbsolutePosition.X and
	gui1.AbsolutePosition.Y + math.abs(math.floor(gui1.AbsoluteSize.Y)) > gui2.AbsolutePosition.Y and
	gui2.AbsolutePosition.Y + math.abs(math.floor(gui2.AbsoluteSize.Y)) > gui1.AbsolutePosition.Y
end

Flurite - 21:36, 21 January 2012 (UTC)

That's a real mess, and impossible to read. Why the math.abs(math.floor(?

NXTBoy (talk • contribs)

22:21, 21 January 2012 (UTC)

Well, that's how I was taught and it seems pretty common elsewhere as well. The math.floor() was used because sometimes the size of a UDim2 gets to a decimal point for some reason, so that rounds it down to the nearest pixel, and the math.abs() is used for negative positions. What's good about using AbsolutePositions/Sizes is that they work for scales and offsets and a combination. With explanation and diagrams, it's pretty easy to understand. Flurite - 01:00, 22 January 2012 (UTC)

the math.abs() is used for negative positions - Read your code again - it's being used on AbsoluteSize. Surely that's always positive?

NXTBoy (talk • contribs)

08:50, 22 January 2012 (UTC)

Oh, well I guess that might not matter, but share that formula on the wiki? Flurite - 16:11, 22 January 2012 (UTC)