Returns an x,y pair on circle, assuming center is 0,0.
/**
* Draws an arc.
*
* @param integer $x The x coordinate of the centre.
* @param integer $y The y coordinate of the centre.
* @param integer $r The radius of the arc.
* @param integer $start The start angle of the arc.
* @param integer $end The end angle of the arc.
* @param string $color The line color of the arc.
* @param string $fill The fill color of the arc (defaults to none).
*/
public function arc($x, $y, $r, $start, $end, $color = 'black', $fill = 'none')
{
// Split up arcs greater than 180 degrees into two pieces.
$this->_postSrcOperations[] = "-stroke {$color} -fill {$fill}";
$mid = round(($start + $end) / 2);
$x = round($x);
$y = round($y);
$r = round($r);
if ($mid > 90) {
$this->_postSrcOperations[] = "-draw \"ellipse {$x},{$y} {$r},{$r} {$start},{$mid}\"";
$this->_postSrcOperations[] = "-draw \"ellipse {$x},{$y} {$r},{$r} {$mid},{$end}\"";
} else {
$this->_postSrcOperations[] = "-draw \"ellipse {$x},{$y} {$r},{$r} {$start},{$end}\"";
}
// If filled, draw the outline.
if (!empty($fill)) {
list($x1, $y1) = Horde_Image::circlePoint($start, $r * 2);
list($x2, $y2) = Horde_Image::circlePoint($mid, $r * 2);
list($x3, $y3) = Horde_Image::circlePoint($end, $r * 2);
$verts = array(array('x' => $x + round($x3), 'y' => $y + round($y3)), array('x' => $x, 'y' => $y), array('x' => $x + round($x1), 'y' => $y + round($y1)));
if ($mid > 90) {
$verts1 = array(array('x' => $x + round($x2), 'y' => $y + round($y2)), array('x' => $x, 'y' => $y), array('x' => $x + round($x1), 'y' => $y + round($y1)));
$verts2 = array(array('x' => $x + round($x3), 'y' => $y + round($y3)), array('x' => $x, 'y' => $y), array('x' => $x + round($x2), 'y' => $y + round($y2)));
$this->polygon($verts1, $fill, $fill);
$this->polygon($verts2, $fill, $fill);
} else {
$this->polygon($verts, $fill, $fill);
}
$this->polyline($verts, $color);
$this->_postSrcOperations[] = '-stroke none -fill none';
}
}
/**
* Draws an arc.
*
* @param integer $x The x coordinate of the centre.
* @param integer $y The y coordinate of the centre.
* @param integer $r The radius of the arc.
* @param integer $start The start angle of the arc.
* @param integer $end The end angle of the arc.
* @param string $color The line color of the arc.
* @param string $fill The fill color of the arc (defaults to none).
*/
public function arc($x, $y, $r, $start, $end, $color = 'black', $fill = null)
{
if (!empty($fill)) {
$style = 'fill:' . Horde_Image::getHexColor($fill) . '; ';
} else {
$style = 'fill:none;';
}
$style .= 'stroke:' . Horde_Image::getHexColor($color) . '; stroke-width:1';
$mid = round(($start + $end) / 2);
// Calculate the path entry.
$path = '';
// If filled, draw the outline.
if (!empty($fill)) {
// Start at the center of the ellipse the arc is on.
$path .= "M {$x},{$y} ";
// Draw out to ellipse edge.
list($arcX, $arcY) = Horde_Image::circlePoint($start, $r * 2);
$path .= 'L ' . round($x + $arcX) . ',' . round($y + $arcY) . ' ';
}
// Draw arcs.
list($arcX, $arcY) = Horde_Image::circlePoint($mid, $r * 2);
$path .= "A {$r},{$r} 0 0 1 " . round($x + $arcX) . ',' . round($y + $arcY) . ' ';
list($arcX, $arcY) = Horde_Image::circlePoint($end, $r * 2);
$path .= "A {$r},{$r} 0 0 1 " . round($x + $arcX) . ',' . round($y + $arcY) . ' ';
// If filled, close the outline.
if (!empty($fill)) {
$path .= 'Z';
}
$path = trim($path);
$this->_svg->addChild(new XML_SVG_Path(array('d' => $path, 'style' => $style)));
}
/**
* Draws an arc.
*
* @param integer $x The x coordinate of the centre.
* @param integer $y The y coordinate of the centre.
* @param integer $r The radius of the arc.
* @param integer $start The start angle of the arc.
* @param integer $end The end angle of the arc.
* @param string $color The line color of the arc.
* @param string $fill The fill color of the arc (defaults to none).
*/
public function arc($x, $y, $r, $start, $end, $color = 'black', $fill = 'none')
{
$points = Horde_Image::arcPoints($r, $start, $end);
$points['x1'] += $x;
$points['x2'] += $x;
$points['x3'] += $x;
$points['y1'] += $y;
$points['y2'] += $y;
$points['y3'] += $y;
try {
$draw = new ImagickDraw();
$draw->setStrokeColor(new ImagickPixel($color));
$draw->setFillColor(new ImagickPixel($fill));
$draw->arc($x - $r, $y - $r, $x + $r, $y + $r, $start, $end);
} catch (ImagickDrawException $e) {
throw new Horde_Image_Exception($e);
} catch (ImagickPixelException $e) {
throw new Horde_Image_Exception($e);
}
// If filled, draw the outline.
if (!empty($fill)) {
$mid = round(($start + $end) / 2);
list($x1, $y1) = Horde_Image::circlePoint($start, $r * 2);
list($x2, $y2) = Horde_Image::circlePoint($mid, $r * 2);
list($x3, $y3) = Horde_Image::circlePoint($end, $r * 2);
$verts = array(array('x' => $x + round($x3), 'y' => $y + round($y3)), array('x' => $x, 'y' => $y), array('x' => $x + round($x1), 'y' => $y + round($y1)));
if ($mid > 90) {
$verts1 = array(array('x' => $x + round($x2), 'y' => $y + round($y2)), array('x' => $x, 'y' => $y), array('x' => $x + round($x1), 'y' => $y + round($y1)));
$verts2 = array(array('x' => $x + round($x3), 'y' => $y + round($y3)), array('x' => $x, 'y' => $y), array('x' => $x + round($x2), 'y' => $y + round($y2)));
$this->polygon($verts1, $fill, $fill);
$this->polygon($verts2, $fill, $fill);
} else {
$this->polygon($verts, $fill, $fill);
}
$this->polyline($verts, $color);
}
try {
$this->_imagick->drawImage($draw);
} catch (ImagickException $e) {
throw new Horde_Image_Exception($e);
}
$draw->destroy();
}
