/**
* Calculates a Bezier control point, this function must be called for BOTH
* X and Y coordinates (will it work for 3D coordinates!?)
*
* @param double $p1 1st point
* @param double $p2 Point to
* @param double $factor Mirror factor, 0 returns P2, 1 returns a pure
* mirror, i.e. P1 on the exact other side of P2
* @return double P1 mirrored in P2 by Factor
* @static
*/
function controlPoint($p1, $p2, $factor, $smoothFactor = 0.75)
{
$sa = Image_Canvas_Tool::mirror($p1, $p2, $smoothFactor);
$sb = Image_Canvas_Tool::mid($p2, $sa);
$m = Image_Canvas_Tool::mid($p2, $factor);
$pC = Image_Canvas_Tool::mid($sb, $m);
return $pC;
}
