I am making a game where you have units on a grid and can move them around. Presuming a unit is at green and they want to move to pink, how can I see that pink is only 4 tiles away? As a point of reference, 0,0 is black, and 4,4 is white. Red is the path, how can I tell they have only crossed 4 tiles? Green is 0,2 and Pink is 2,0 if you add the difference of those numbers you get 4 however, in programming if you do something like:
green - pink
you're getting
0, 2 - 2, 0
which is
-2 + 2
so 0 and this makes it seem they haven't moved, so my question is how can I get the difference between two numbers without subtraction, because this won't work here.
7 comments
shouldnt it be 3 values? 0,2,0???? AND it should be Y-Y Z-Z X-X i think
Yeah, of course, i'm just doing it on a 2d perspectie at the moment, still an input on answering the question? Thanks!
Since all you want is distance, and distance is a series of positive values (regardless of position like displacement), you can just math.abs() every single value and add them. This wouldn't be the distance formula, which would give you the length of a diagonal between the two points referenced.
If you subtract oldX by newX and oldZ by newZ, you'll get -2 and 2, if we add the absolute values of both of the result, then add them together, you'll get 4, which is the distance.
EXAMPLE: oldX: 10 oldY:0 newX:5 newY: 10 10 - 5 = 5, 0 - 10 = -10 abs(5)+abs(10)=15
magnitude
Thank, you LegitmatlyMe i'll test that tomorrow, LegoJoker, as you can see, I am measuring the grid not studs