int GetDist(int X, int Y, int MiddleX, int MiddleY) Damn maths.
February 25, 2003 04:51 AM
Damn maths, why''d I have to fail.
Oh, hi. I was wondering, I have a 2D array (eg char c[5][5]) and I was wondering. If I have a point (say, 1,6) what formula can I use to see how far away that is from the center point? Say, if I had a function with the following definition:
the future is just like the past, just later. - TANSTAAFL
372
February 25, 2003 04:59 AM
r = √((X - MiddleX)² + (Y - MiddleY)² )
Pythagorus.
[edited by - Useless Hacker on February 25, 2003 6:06:06 AM]
Pythagorus.
[edited by - Useless Hacker on February 25, 2003 6:06:06 AM]
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794
February 25, 2003 05:00 AM
Draw the problem on a piece of paper and the solution should hit you in the face (Hint: starts with ''P'' ends in ''oras'')
Skizz
Skizz
February 25, 2003 06:31 PM
How would I write that (eg the indicies etc) in C++? Sorry, but I''m kinda... dumb.
Yo Tyler, I hear your mum''s goin out with... SQUEEK!
Yo Tyler, I hear your mum''s goin out with... SQUEEK!
the future is just like the past, just later. - TANSTAAFL
122
February 25, 2003 06:40 PM
Well, if your function prototype is really going to be what''s in your original post, you don''t need to index into an array at all. Hell, you don''t even need to have an array. It''s basic algebra + the Pythagorean theorem.
500x7 >_<
500x7 >_<
276
February 25, 2003 11:07 PM
I''m a little confused as to why there is an array there in the first place too 
I don''t think you need it. But like the people above mentioned, definetly take a look at the pythagorean theorem (seeing as you you have a difference in x''s, and a difference in y''s, it should be easy to find the distance)
Make sure to use variables of type float for this too; I often found myself (and still do, to some degree) defaulting to type int.
I don''t think you need it. But like the people above mentioned, definetly take a look at the pythagorean theorem (seeing as you you have a difference in x''s, and a difference in y''s, it should be easy to find the distance) Make sure to use variables of type float for this too; I often found myself (and still do, to some degree
) defaulting to type int.
Peon
February 26, 2003 12:04 AM
No, I''m not using an array. I was having trouble of how to word the question, so the word ''array '' came to mind. Sorry...
Yo Tyler, I hear your mum''s goin out with... SQUEEK!
Yo Tyler, I hear your mum''s goin out with... SQUEEK!
the future is just like the past, just later. - TANSTAAFL
276
February 26, 2003 12:52 AM
Now I''m even more confused because you wrote:
That char c[5][5] is definetly an array
Is that part of the original questions, or... ?
quote: Oh, hi. I was wondering, I have a 2D array (eg char c[5][5]) and I was wondering...
That char c[5][5] is definetly an array
Is that part of the original questions, or... ?
Peon
February 27, 2003 03:31 AM
Ok, let me rephrase the question. If I had four integers (int X1,Y1,X2,Y2) how can I get the distance between the two?
If that is still confusing, yeah.
Yo Tyler, I hear your mum''s goin out with... SQUEEK!
If that is still confusing, yeah.
Yo Tyler, I hear your mum''s goin out with... SQUEEK!
the future is just like the past, just later. - TANSTAAFL
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