computing distance

**computing distance -** 10-21-2006, 10:57 AM

I have to compute the distance between two points entered by the user. I have already made the 4 points (x1, x2, y1, y2) and have them set to whatever the user enters. Now I just need to compute the distance which should be (x1-x2)^2 + (y1-y2)^2. Any ideas as to how to do this?

05:07 PM

go to world functions and scroll down to advanced math
you should be able to use those

use Print for your answer

with a test world i created, it seems that it always truncates so the answer wont be accurate unless someone comes here and can fix that :P

**I can't repeat your problem, could you post the code? -** 10-22-2006, 07:05 PM

Can you post the code (or the world) that's giving you the truncation problem? I've done a half dozen tests and haven't seen any real truncation issue (Alice will drop trailing zero's but that won't affect accuracy).

Usually I see the opposite problem, Alice will print all twenty digits or so of a double precision number (the basic Alice format) when really only the first two or three digits are significant, but the very last digit after the decimal place is a one or two.

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	#1 (permalink)
sidny4 Guest Status: Posts: n/a	computing distance - 10-21-2006, 10:57 AM I have to compute the distance between two points entered by the user. I have already made the 4 points (x1, x2, y1, y2) and have them set to whatever the user enters. Now I just need to compute the distance which should be (x1-x2)^2 + (y1-y2)^2. Any ideas as to how to do this?

	#2 (permalink)
Clunk Guest Status: Posts: n/a	10-21-2006, 04:57 PM go to world functions and scroll down to advanced math you should be able to use those use Print for your answer with a test world i created, it seems that it always truncates so the answer wont be accurate unless someone comes here and can fix that :P Last edited by Clunk; 10-21-2006 at 05:07 PM.

	#3 (permalink)
DrJim Guest Status: Posts: n/a	I can't repeat your problem, could you post the code? - 10-22-2006, 07:05 PM Can you post the code (or the world) that's giving you the truncation problem? I've done a half dozen tests and haven't seen any real truncation issue (Alice will drop trailing zero's but that won't affect accuracy). Usually I see the opposite problem, Alice will print all twenty digits or so of a double precision number (the basic Alice format) when really only the first two or three digits are significant, but the very last digit after the decimal place is a one or two.