Calculate distance between two x/y coordinates?

Question

I would like to calculate the distance between two x/y coordinates on the surface of a torus. So, this is a normal grid that has the property that its corners and sides are \'co

Answer 1

for points (x1,y1) and (x2,y2), you need to calculate 4 distances:

• from (x1,y1) to (x2,y2)
• from (x1,y1) to (x2, 500-y2)
• from (x1,y1) to (500-x2, y2)
• from (x1,y1) to (500-x2, 500-y2)

and then take the minimum of those.