Most recent change of ConicSection

Edit made on November 17, 2008 by DerekCouzens at 20:11:06

Deleted text in red / Inserted text in green

A conic section is the curve obtained by the intersection of a plane and a cone (a conic surface).

These are:
* circle - cutting perpendicular to the centre line axis of symmetry of the cone
* ellipse - cutting at an angle between the centre line and less than the slope angle.
* parabola - cutting parallel at an angle equal to one edge the slope angle
* hyperbola - cutting parallel to at an angle greater than the centre line slope angle

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There are some degenerate cases: cases i.e. when the cutting plane passes through the apex of the cone:
* point - a degenerate circle (or ellipse)
* line - a degenerate parabola
* intersecting lines - a degenerate hyperbola