[Math] sin(), cos() not working? What special magic must I use to summon their powers?
[Math] sin(), cos() not working? What special magic must I use to summon their powers?
- Subject: [Math] sin(), cos() not working? What special magic must I use to summon their powers?
- From: Michael Robinson <email@hidden>
- Date: Wed, 1 Oct 2008 00:29:32 +1300
Hello,
I am trying to convert the following from Javascript to Cocoa ObjC:
var retVal = Math.round(cornerSize*(1-Math.cos(Math.asin(i/
cornerSize))));
return retVal;
Now retVal _must_ be an int, because the value is used as a margin
attribute ("rounding" corners of divs).
This is what I've got:
Variables i, cornerSize are passed to the function from a for loop. i
being the counter for the loop, cornerSize being the size of corner
desired by the user.
float retVal;
retVal = cornerSize*(1-cos(asin(i/cornerSize)));
return (int)retVal;
Obviously, I'm no whiz at ObjC, and the fact that this keeps return
'0' has got me stumped.
At first I thought it was some stupid mistake I made translating the
formula, but I tested a few things and now I'm not so sure.
sin(90); returns 0 as well. When I use Apple's Calculator and ask it
to tell me the result of sin(90), it gives me 1.
What what whaaaaat?
Do I need to import something for this to work? Am I not tilting my
head in the correct direction while typing my code?
I'm pretty stuck here, and would appreciate any help.
Thanks
Mike
- - -
Errors have occurred.
We won't tell you where or why.
Lazy programmers.
- - -
Charlie Gibbs
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