1.51 class ellipse

Ellipse shape. It is possible to define a graphical->texture for the line and a ellipse->fill for the interior. See also class circle.

For consistency with boxes, etc., the graphical->position of an ellipse is the top-left corner. Use graphical->center to define the center.

See also

class circle

1.51.1 Instance variables

ellipse <- fill: colour|{foreground,background}*

When not @nil, the interior is filled with the specified colour.

Defaults: @nil

ellipse <- shadow: int

Amount (pixels) of shadow painted below and right of the ellipse. The default is 0 (zero, no shadow).

1.51.2 Send methods

ellipse ->inside: x=int, y=int

Succeed if the point (X, Y) — in the ellipse's graphical<-device coordinate system — lies inside the ellipse inscribed in the bounding box graphical<-area. Uses the standard ellipse equation

((X - cx) / rx)² + ((Y - cy) / ry)² ≤ 1

where (cx, cy) is the centre and (rx, ry) the semi-axes. Bbox corners just miss the shape.

This is the same test used by graphical->in_event_area to accept a click: that method additionally inflates the ellipse by event_tolerance pixels on each side so hits within tolerance of the outline still count.