EllipsePolygon function
Gets an array of points for a polygon which approximates an ellipse in the specified rectangle.
Declaration
function EllipsePolygon(const aRect: TRect): TPointArrayDescription
EllipsePolygon is a
TPointArray function used to
calculate the array of points which approximate an ellipse bounded by the
rectangle specified in the ARect argument. In EllipsePolygon, the ellipse is
aligned to X and Y axes in the rectangle. It calculates the center point,
radii, and diameter for the ellipse using ARect as well as the minimum number
of points needed such that the distance between the edges of the rectangle and
the mathematical circle is less than the rounding error (0.5) and a smoother
stepping value of 0.4. The points for the polygon are calculated and stored in
the return value.
An experiment, built from Lazarus main 2dfa93c66e of 10-22-2026. Not the official Lazarus documentation.