/**
* Parameter array:
*
* 'connect': bool [optional] Specifies whether the start point should be
* connected to the endpoint (closed polygon) or not (connected line)
*
* 'fill': mixed [optional] The fill color
*
* 'line': mixed [optional] The line color
* @param array $params Parameter array
*/
function polygon($params)
{
include_once 'Image/Canvas/Tool.php';
$connectEnds = isset($params['connect']) ? $params['connect'] : false;
$fillColor = isset($params['fill']) ? $params['fill'] : false;
$lineColor = isset($params['line']) ? $params['line'] : false;
if (!$connectEnds) {
$fillColor = 'transparent';
}
$style = $this->_getLineStyle($lineColor) . $this->_getFillStyle($fillColor);
$lastPoint = false;
foreach ($this->_polygon as $point) {
if ($lastPoint && isset($lastPoint['P1X']) && isset($lastPoint['P1Y']) && isset($lastPoint['P2X']) && isset($lastPoint['P2Y'])) {
$dx = abs($point['X'] - $lastPoint['X']);
$dy = abs($point['Y'] - $lastPoint['Y']);
$d = sqrt($dx * $dx + $dy * $dy);
if ($d > 0) {
$interval = 1 / $d;
for ($t = 0; $t <= 1; $t = $t + $interval) {
$x = Image_Canvas_Tool::bezier($t, $lastPoint['X'], $lastPoint['P1X'], $lastPoint['P2X'], $point['X']);
$y = Image_Canvas_Tool::bezier($t, $lastPoint['Y'], $lastPoint['P1Y'], $lastPoint['P2Y'], $point['Y']);
if (!isset($low['X'])) {
$low['X'] = $x;
} else {
$low['X'] = min($x, $low['X']);
}
if (!isset($high['X'])) {
$high['X'] = $x;
} else {
$high['X'] = max($x, $high['X']);
}
if (!isset($low['Y'])) {
$low['Y'] = $y;
} else {
$low['Y'] = min($y, $low['Y']);
}
if (!isset($high['Y'])) {
$high['Y'] = $y;
} else {
$high['Y'] = max($y, $high['Y']);
}
$polygon[] = $x;
$polygon[] = $y;
}
if ($t - $interval < 1) {
$x = Image_Canvas_Tool::bezier(1, $lastPoint['X'], $lastPoint['P1X'], $lastPoint['P2X'], $point['X']);
$y = Image_Canvas_Tool::bezier(1, $lastPoint['Y'], $lastPoint['P1Y'], $lastPoint['P2Y'], $point['Y']);
$polygon[] = $x;
$polygon[] = $y;
}
}
} else {
if (!isset($low['X'])) {
$low['X'] = $point['X'];
} else {
$low['X'] = min($point['X'], $low['X']);
}
if (!isset($high['X'])) {
$high['X'] = $point['X'];
} else {
$high['X'] = max($point['X'], $high['X']);
}
if (!isset($low['Y'])) {
$low['Y'] = $point['Y'];
} else {
$low['Y'] = min($point['Y'], $low['Y']);
}
if (!isset($high['Y'])) {
$high['Y'] = $point['Y'];
} else {
$high['Y'] = max($point['Y'], $high['Y']);
}
$polygon[] = $point['X'];
$polygon[] = $point['Y'];
}
$lastPoint = $point;
}
if (isset($polygon) && is_array($polygon)) {
if ($connectEnds) {
if (($fill = $this->_getFillStyle($fillColor, $low['X'], $low['Y'], $high['X'], $high['Y'])) !== false) {
ImageFilledPolygon($this->_canvas, $polygon, count($polygon) / 2, $fill);
}
if ($this->_antialias === 'driver') {
$pfirst = $p0 = false;
reset($polygon);
while (list(, $x) = each($polygon)) {
list(, $y) = each($polygon);
if ($p0 !== false) {
$this->_antialiasedLine($p0['X'], $p0['Y'], $x, $y, $lineColor);
}
if ($pfirst === false) {
$pfirst = array('X' => $x, 'Y' => $y);
}
$p0 = array('X' => $x, 'Y' => $y);
}
$this->_antialiasedLine($p0['X'], $p0['Y'], $pfirst['X'], $pfirst['Y'], $lineColor);
} elseif (($line = $this->_getLineStyle($lineColor)) !== false) {
ImagePolygon($this->_canvas, $polygon, count($polygon) / 2, $line);
}
} else {
$prev_point = false;
if ($this->_antialias === 'driver') {
reset($polygon);
while (list(, $x) = each($polygon)) {
list(, $y) = each($polygon);
if ($prev_point) {
$this->_antialiasedLine($prev_point['X'], $prev_point['Y'], $x, $y, $lineColor);
}
$prev_point = array('X' => $x, 'Y' => $y);
}
} elseif (($line = $this->_getLineStyle($lineColor)) !== false) {
reset($polygon);
while (list(, $x) = each($polygon)) {
list(, $y) = each($polygon);
if ($prev_point) {
ImageLine($this->_canvas, $prev_point['X'], $prev_point['Y'], $x, $y, $line);
}
$prev_point = array('X' => $x, 'Y' => $y);
}
}
}
}
parent::polygon($params);
}
