VS:LineEllipseIntersect

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Description

Calculates the intersection between the specified line and ellipse.

PROCEDURE LineEllipseIntersect(
                a1           :POINT;
                a2           :POINT;
                upperRight   :POINT;
                lowerLeft    :POINT;
                VAR int1     :POINT;
                VAR legal1   :BOOLEAN;
                VAR int2     :POINT;
                VAR legal2   :BOOLEAN);

def vs.LineEllipseIntersect(a1, a2, upperRight, lowerLeft):
    return (int1, legal1, int2, legal2)

Parameters

a1		POINT		Start point of the line
a2		POINT		End point of the line
upperRight		POINT		Upper-right point of the ellipse
lowerLeft		POINT		Lower-left point of the ellipse
int1		POINT		On return, first point of intersection, if found
legal1		BOOLEAN		On return, second point of intersection, if found
int2		POINT		On return, indicates that int1 is a valid point of intersection
legal2		BOOLEAN		On return, indicates that int2 is a valid point of intersection

Remarks

On return, int1 and int2 are the two possible points of intersection. legal1 and legal2 indicate if the intersections are actually valid.

Version

Availability: from VectorWorks10.0