the cos() and sin() functions are not returning the corect value! when i put in a value it gives me some wacky answer like cos(180) = -0.59846006905786 when it is actually equal to -1 acording to my £6 calculator and the coalculator program on widows. HELP this is very anoying!!! ~prevail by daring to fail~

That''s because it expects radians in, not normal 360 degreed...

Multiply the number you want to cos by ( PI / 180.0f ) and it will work correctly.....

the phrase rtm springs to mind ;-)

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what does rtm meen???? and is there a way to set the defult to be degrees not rads?

~prevail by daring to fail~

RTM means Read The Manual. RTFM is more common, "Read the F''ing Manual"

You could write your own function that uses degrees. But the reason the functions are in Radians is because the Math world uses Radians, not degrees.

Epolevne

Yep Yep! So does Physics! Learned that the hard way when I was coding a trajectory function! =)

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Radians are kind of cool after a while, but I heard there''s a metric degree or something of the sort where 100 metric degrees is a complete circle. I think that would be even better.

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A CRPG in development...

Need help? Well, go FAQ yourself.

I prefer brads (256 per circle) and wrads (65536 per circle). Put them in a lookup table and you can have high speed rotation in the perfect computer friendly format.

I totally disagree with the RTM/RTFM thing. If everyone reads the manual (or in this case the help file), there will never be any more questions that I understand and can actually correctly answer

quote:

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Original post by Nazrix

Radians are kind of cool after a while, but I heard there''s a metric degree or something of the sort where 100 metric degrees is a complete circle. I think that would be even better.

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I seem to remember (vaguely) about something called Gradiens, (gradients?), in which the circle is divided up into 400 degree''s, 100 degrees for each quadrant.

im not sure if we are referring to the same thing.



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My earnest prayers Which do importune thee,
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Yes,

2 pi rads = 360 degrees = 400 gradients... I have never seen anyone actually use gradients but perhaps there is some kind of advantage in using them.
Radians are the most common i math for a number of reasons. Radians are nice because they relate to the length of the circular sector. An angle of one pi rads is equal to 180 degrees but one pi rads is also the length of the arch between 0 and 180 degrees if the radius is one (a unit circle). I Hope you understand what I''m trying to say


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