I wrote a function to calculate the distance between two positions:

```
def distanceBetween(pos1, pos2):
xDiff = pos2.x - pos1.x
yDiff = pos2.y - pos1.y
dist = Math.sqrt(xDiff**2 + yDiff**2)
# self.say(dist)
return(dist)
```

However, this seems to tax the system. If I use this function in Summit’s Gate, the Chrome Browser crashes. Even on my powerful desktop system.

I suggest using the following approximation:

```
def distanceBetween(pos1, pos2):
xDiff = pos2.x - pos1.x
yDiff = pos2.y - pos1.y
if xDiff < 0 :
xDiff = -xDiff
if yDiff < 0 :
yDiff = -yDiff
if xDiff > yDiff :
dist = xDiff + 0.33 *yDiff
else :
dist = yDiff + 0.33 *xDiff
# self.say(dist)
return(dist)
```

The answer returned is within 6% of the exact value and avoids the square and square root functions.

(Note: I see an old topic which says that you should be able to call distanceTo on other objects, but that didn’t seem to be working for me. I will re-investigate.)