/**
* @param float $r1
* @param float $r2
* @param float $alpha
* @param float $angle
*
* @return Path
*/
function getGroupPath($r1, $r2, $alpha, $angle)
{
$radians = ArcUtils::getArcRadians($alpha, $angle);
$scale = ArcUtils::getScale($radians);
list($sX, $sY) = ArcUtils::getPolarPoint($r2, $radians[0]);
list($curX, $curY) = ArcUtils::getPolarPoint($r1, $radians[0]);
$path = new Path($sX, $sY);
if ($r1 !== $r2) {
$path->lineTo($curX, $curY);
}
$pos = 1;
while ($pos < count($radians)) {
list($nextX, $nextY) = ArcUtils::getPolarPoint($r1, $radians[$pos++]);
list($c1X, $c1Y) = ArcUtils::getBezierControl($curX, $curY, -$scale);
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;
}
/**
* @return Path
*/
private function getPartialRingPath()
{
$outer = $this->getOuterRadius();
$inner = $this->getInnerRadius();
$cx = $this->getX();
$cy = $this->getY();
if ($this->angle === 0.0) {
$radian = ArcUtils::toRadian($this->getAlpha());
list($outerX, $outerY) = ArcUtils::getPolarPoint($outer, $radian);
list($innerX, $innerY) = ArcUtils::getPolarPoint($inner, $radian);
return (new Path($outerX + $cx, $outerY + $cy))->lineTo($innerX + $cx, $innerY + $cy)->close();
}
$radians = ArcUtils::getArcRadians($this->getAlpha(), $this->getAngle());
$scale = ArcUtils::getScale($radians);
$pos = 0;
// outer arc
list($curX, $curY) = ArcUtils::getPolarPoint($outer, $radians[$pos++]);
$path = new Path($curX + $cx, $curY + $cy);
while ($pos < count($radians)) {
list($nextX, $nextY) = ArcUtils::getPolarPoint($outer, $radians[$pos++]);
list($c1X, $c1Y) = ArcUtils::getBezierControl($curX, $curY, -$scale);
list($c2X, $c2Y) = ArcUtils::getBezierControl($nextX, $nextY, $scale);
$path->curveTo($c1X + $cx, $c1Y + $cy, $c2X + $cx, $c2Y + $cy, $nextX + $cx, $nextY + $cy);
$curX = $nextX;
$curY = $nextY;
}
// inner arc
list($curX, $curY) = ArcUtils::getPolarPoint($inner, $radians[--$pos]);
if ($this->angle === 360.0) {
// full ring
$path->close()->moveTo($curX + $cx, $curY + $cy);
} else {
$path->lineTo($curX + $cx, $curY + $cy);
}
while ($pos > 0) {
list($nextX, $nextY) = ArcUtils::getPolarPoint($inner, $radians[--$pos]);
list($c1X, $c1Y) = ArcUtils::getBezierControl($curX, $curY, $scale);
list($c2X, $c2Y) = ArcUtils::getBezierControl($nextX, $nextY, -$scale);
$path->curveTo($c1X + $cx, $c1Y + $cy, $c2X + $cx, $c2Y + $cy, $nextX + $cx, $nextY + $cy);
$curX = $nextX;
$curY = $nextY;
}
// close path
$path->close();
return $path;
}
