vectors using odd angles

[SteveCRM]

don't know why but i just can't get anything to work here:

I have an angle (goes over 360, positive and negetive), its a float, so I can't use mod.
all I want to do is split my line into the vector components. How would I do this with such odd angles?

[Sastraxi]

What do you mean by splitting a line into vector components? Do you mean describing the slope with an angle?

[SteveCRM]

example:

if I have a vector of 16 at 33 degrees. the two components (like 2 legs on a triangle) making up that line would be 8.7 and 13.4

[jim mcnamara]

It's called polar coordinates -

Don't forget this code works in radians

#include <math.h>

struct vector{
     float x;
     float y;
};

int main(){
       struct vector test;
       float angle = 33/ (2*M_PI); // radians
       float magnitude = 16;
       test.x=0;
       test.y=0;
       test=PolarToXY(angle,magnitude,test);
       printf("%f, %f\n",test.x,test.y);
       return 0;
}
struct vector  PolarToXY(float angle, float magnitude,
                                         struct vector src){
       src.x=cos(angle)*magnitude;
       src.y=sin(angle)*magnitude;
       return src;

}

[jim mcnamara]

And, depending on the angle, the resultants can be negative.

[SteveCRM]

ah! i forgot that cos sin and tan worked with radians! works like a charm now....thanks guys!