Lines Matching refs:ellipse
34 #include <2geom/ellipse.h>
51 THROW_RANGEERROR("den == 0, while computing ellipse centre");
56 // evaluate the a coefficient of the ellipse equation in normal form
65 //evaluate ellipse rotation angle
68 // evaluate the length of the ellipse rays
95 // the solution is not unique so we choose always the ellipse
119 THROW_RANGEERROR("a degenerate ellipse doesn't have an inverse unit circle transform");
174 THROW_RANGEERROR("a degenerate ellipse doesn't have an implicit form");
373 // degenerate ellipse is basically a reparametrized line segment
427 // substitute that into the ellipse equation, making it quadratic in x
480 // Assume that Q is the ellipse equation given by uppercase letters
612 // We want to know whether no point on ellipse a is further than precision
613 // from the corresponding point on ellipse b. To check this, we compute
614 // the four extreme points at the end of each ray for each ellipse
632 // Do the actual comparison by computing four points on each ellipse.