intholder[1] = sqrt( ( (mousex - (mypx-scrlxoff))^2 + (mousey - (mypy-scrlyoff))^2 ) ); Problem With Pythagorean Theorem
Author
I have this code in my 2D C++ game to find the distance between the mouse and a point on the screen (myp_-scrl_off):
Gives you messed up numbers. Would you mind sharing those numbers with us, and the output they produce? Could you also tell us what myp_ and scrl_off are?
^ in C++ is not the power but the bitwise exclusive or operator
use a function like pow() to get the powers right
Runicsoft -- home of my open source Function Parser and more
use a function like pow() to get the powers right
Runicsoft -- home of my open source Function Parser and more
quote:Original post by ZealousElixir
Geeezz...how did I miss that?! Thanks Burning.
*goes off to get some rest*
UhOh, Zealous is getting sloppy in his old age =)
*grins* - j/k. I didn''t even KNOW that ''^'' didn''t work for powers, and you''ve helped me plenty of times.
~~~~~~~~~~~
Chris Vogel
~~~~~~~~~~~
quote:Original post by Radagar
UhOh, Zealous is getting sloppy in his old age =)
Sure feels like it, and I''m not even 20 yet
I would advice you to look up the hypot() function. It does the calculation for you.
/John
/John
A call to _hypot is equivalent to the square root of x2 + y2.
I might be NIH-syndromatic, but it doesn't seem like you gain anything by using hypot instead of your own function or just inlining it.
Peace,
ZE.
//email me.//zealouselixir software.//msdn.//n00biez.//
miscellaneous links
[edited by - zealouselixir on September 16, 2002 11:35:08 PM]
I might be NIH-syndromatic, but it doesn't seem like you gain anything by using hypot instead of your own function or just inlining it.
Peace,
ZE.
//email me.//zealouselixir software.//msdn.//n00biez.//
miscellaneous links
[edited by - zealouselixir on September 16, 2002 11:35:08 PM]
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