Does the angle I specify in sin and cos function in degrees or in radians ???

Radians.

the sin() and cos() in math.h uses radians

quote: Original post by SKSlayer

Does the angle I specify in sin and cos function in degrees or in radians ???

check out the tutorial on moving through 3d space, as a conversion factor''s used to move to degrees from radians - handy for 360 degree movement..

I know how to convert, that''s what they teached us at school :o)

Because sin and cos are pretty slow functions, you could make your own.
Just declare an array called sin[360] and cos [360] and use sin and cos to fill them initially.
Of course, when smaller increments are needed...you''ll need sin() and cos()

oh, okay,
Are they as slow as sqrt ???

quote: Original post by SKSlayer

oh, okay,
Are they as slow as sqrt ???

Slower.
I tested it:
50000000 sqrt()''s need about 10 s
50000000 sin()''s need about 20 s.

GA

Well, that''s never gonna happen

I usually wrap
sin(3*PI) is the same as sin(PI) (2*PI is 360° right ?)

For 3D real-time programming is REALLY important that you use Lookup Tables.

Just declares two array (one for cons and one sof sins) and precalculate them at the startup of the program. Then refer to them when you need sins or cons.