/**
*
*/
public function apply($bounds, $vertex, $next, $orthogonal)
{
$direction = $vertex != null ? mxUtils::getValue($vertex->style, mxConstants::$STYLE_DIRECTION) : null;
$vertical = $direction == mxConstants::$DIRECTION_NORTH || $direction == mxConstants::$DIRECTION_SOUTH;
$x = $bounds->x;
$y = $bounds->y;
$w = $bounds->width;
$h = $bounds->height;
$cx = $x + $w / 2;
$cy = $y + $h / 2;
$start = new mxPoint($x, $y);
$corner = new mxPoint($x + $w, $cy);
$end = new mxPoint($x, $y + $h);
if ($direction == mxConstants::$DIRECTION_NORTH) {
$start = end;
$corner = new mxPoint($cx, $y);
$end = new mxPoint($x + $w, $y + $h);
} else {
if ($direction == mxConstants::$DIRECTION_SOUTH) {
$corner = new mxPoint($cx, $y + $h);
$end = new mxPoint($x + $w, $y);
} else {
if ($direction == mxConstants::$DIRECTION_WEST) {
$start = new mxPoint($x + $w, $y);
$corner = new mxPoint($x, $cy);
$end = new mxPoint($x + $w, $y + $h);
}
}
}
$dx = $next->x - $cx;
$dy = $next->y - $cy;
$alpha = $vertical ? atan2($dx, $dy) : atan2($dy, $dx);
$t = $vertical ? Matan2($w, $h) : atan2($h, $w);
$base = false;
if ($direction == mxConstants::$DIRECTION_NORTH || $direction == mxConstants::$DIRECTION_WEST) {
$base = $alpha > -$t && $alpha < $t;
} else {
$base = $alpha < -pi() + $t || $alpha > pi() - $t;
}
$result = null;
if ($base) {
if ($orthogonal && ($vertical && $next->x >= $start->x && $next->x <= $end->x || !$vertical && $next->y >= $start->y && $next->y <= $end->y)) {
if ($vertical) {
$result = new mxPoint($next->x, $start->y);
} else {
$result = new mxPoint($start->x, $next->y);
}
} else {
if ($direction == mxConstants::$DIRECTION_NORTH) {
$result = new mxPoint($x + $w / 2 + $h * tan($alpha) / 2, $y + $h);
} else {
if ($direction == mxConstants::$DIRECTION_SOUTH) {
$result = new mxPoint($x + $w / 2 - $h * tan($alpha) / 2, $y);
} else {
if ($direction == mxConstants::$DIRECTION_WEST) {
$result = new mxPoint($x + $w, $y + $h / 2 + $w * tan($alpha) / 2);
} else {
$result = new mxPoint($x, $y + $h / 2 - $w * tan($alpha) / 2);
}
}
}
}
} else {
if ($orthogonal) {
$pt = new mxPoint($cx, $cy);
if ($next->y >= $y && $next->y <= $y + $h) {
$pt->x = $vertical ? $cx : ($direction == mxConstants::$DIRECTION_WEST ? $x + $w : $x);
$pt->y = $next->y;
} else {
if ($next->x >= $x && $next->x <= $x + $w) {
$pt->x = $next->x;
$pt->y = !$vertical ? $cy : ($direction == mxConstants::$DIRECTION_NORTH ? $y + $h : $y);
}
}
// Compute angle
$dx = $next->x - $pt->x;
$dy = $next->y - $pt->y;
$cx = $pt->x;
$cy = $pt->y;
}
if ($vertical && $next->x <= $x + $w / 2 || !$vertical && $next->y <= $y + $h / 2) {
$result = mxUtils::intersection($next->x, $next->y, $cx, $cy, $start->x, $start->y, $corner->x, $corner->y);
} else {
$result = mxUtils::intersection($next->x, $next->y, $cx, $cy, $corner->x, $corner->y, $end->x, $end->y);
}
}
if ($result == null) {
$result = new mxPoint($cx, $cy);
}
return $result;
}