list($c2X, $c2Y) = ArcUtils::getBezierControl($nextX, $nextY, $scale);
$path->curveTo($c1X, $c1Y, $c2X, $c2Y, $nextX, $nextY);
$curX = $nextX;
$curY = $nextY;
}
list($eX, $eY) = ArcUtils::getPolarPoint($r2, end($radians));
if ($r1 !== $r2) {
$path->lineTo($eX, $eY);
}
return $path;
}
$graphic = new Graphic();
$graphic->setViewportCorners(-300, -300, 300, 300);
$graphic->getDefaultTextFontStyle()->setName(FontStyle::FONT_HELVETICA)->setHAlign(FontStyle::HORIZONTAL_ALIGN_MIDDLE);
// draw group labels
$graphic->getDefaultShapeStrokeStyle()->setColor('gray');
$graphic->addPath(getGroupPath(275, 280, 1, 118));
$graphic->addPathText('Meine Gruppe', getGroupPath(280, 280, 1, 118));
$graphic->addPath(getGroupPath(275, 280, 121, 118));
$graphic->addPathText('Meine andere Gruppe', getGroupPath(280, 280, 121, 118));
$graphic->addPath(getGroupPath(275, 280, 241, 118));
$graphic->addPathText('Meine dritte Gruppe', getGroupPath(280, 280, 241, 118));
// draw inner arcs
$graphic->getDefaultTextFontStyle()->setVAlign(FontStyle::VERTICAL_ALIGN_CENTRAL);
$graphic->getDefaultTextFillStyle()->setColor('white');
$graphic->getDefaultShapeFillStyle()->setColor(HtmlColor::rgb(236, 88, 85));
$graphic->getDefaultShapeStrokeStyle()->setColor('white');
for ($i = -4; $i < 25; $i++) {
$arc = $graphic->addRingArc(0, 0, 6 * $i + 50, 240, 15 * $i, 15);
$arc->setFillOpacity(($i + 8) / 32.0);
$anchor = $arc->getAnchor(RingArc::ALPHA_CENTRAL, RingArc::RADIUS_MIDDLE);
