ellipse problem

sin() returns the y values for a unit circle and cos() returns the x values on an unit circle, thus, given the half_width (5 in your case) and the half_height (2 in your case) this would get you what you want:

double half_width  = 5;
double half_height = 2;
 
for ( int i = 0; i < 360; i++ )
{
   double a = degrees_to_radians(i); /* C/C++ sin/cos needs andgle in radians not degrees */
   printf( "x = %lf y = %lf", half_width*cos(a), half_height*cos(a) );
}

....

double degrees_to_radians( double degrees )
{
   /* with some comilers this could be:
      static conversion = M_PI / 180.0; */
   static double conversion = 3.1415926535 / 180.0; 

   return conversion * degrees;
}

Unchecked code: may have errors

Edit: added degrees_to_radians()


[edited by - mauman on October 15, 2003 9:47:57 AM]