ImagickDraw::bezier()
(PECL imagick 2.0.0)
Draws a bezier curve
说明
ImagickDraw::bezier(array $coordinates): bool
Warning本函数还未编写文档,仅有参数列表。
Draws a bezier curve through a set of points on the image.
参数
- $coordinates
Multidimensional array like array(array('x'=> 1,'y'=> 2), array('x'=> 3,'y'=> 4))
返回值
没有返回值。
范例
Example #1 ImagickDraw::bezier()
<?php function bezier($strokeColor, $fillColor, $backgroundColor) { $draw = new \ImagickDraw(); $strokeColor = new \ImagickPixel($strokeColor); $fillColor = new \ImagickPixel($fillColor); $draw->setStrokeOpacity(1); $draw->setStrokeColor($strokeColor); $draw->setFillColor($fillColor); $draw->setStrokeWidth(2); $smoothPointsSet = [ [ ['x' => 10.0 * 5, 'y' => 10.0 * 5], ['x' => 30.0 * 5, 'y' => 90.0 * 5], ['x' => 25.0 * 5, 'y' => 10.0 * 5], ['x' => 50.0 * 5, 'y' => 50.0 * 5], ], [ ['x' => 50.0 * 5, 'y' => 50.0 * 5], ['x' => 75.0 * 5, 'y' => 90.0 * 5], ['x' => 70.0 * 5, 'y' => 10.0 * 5], ['x' => 90.0 * 5, 'y' => 40.0 * 5], ], ]; foreach ($smoothPointsSet as $points) { $draw->bezier($points); } $disjointPoints = [ [ ['x' => 10 * 5, 'y' => 10 * 5], ['x' => 30 * 5, 'y' => 90 * 5], ['x' => 25 * 5, 'y' => 10 * 5], ['x' => 50 * 5, 'y' => 50 * 5], ], [ ['x' => 50 * 5, 'y' => 50 * 5], ['x' => 80 * 5, 'y' => 50 * 5], ['x' => 70 * 5, 'y' => 10 * 5], ['x' => 90 * 5, 'y' => 40 * 5], ] ]; $draw->translate(0, 200); foreach ($disjointPoints as $points) { $draw->bezier($points); } //Create an image object which the draw commands can be rendered into $imagick = new \Imagick(); $imagick->newImage(500, 500, $backgroundColor); $imagick->setImageFormat("png"); //Render the draw commands in the ImagickDraw object //into the image. $imagick->drawImage($draw); //Send the image to the browser header("Content-Type: image/png"); echo $imagick->getImageBlob(); } ?>
This function requires at least 3 points. The following code fails when there are only two points left in the array: <?php $im = new Imagick (); $points = array (array ('x' => 10, 'y' => 10), array ('x' => 20, 'y' => 10), array ('x' => 30, 'y' => 40), array ('x' => 40, 'y' => 20), array ('x' => 50, 'y' => 60)); $n = 0; while (!empty ($points)) { $im->newImage (64, 64, "white"); $draw = new ImagickDraw (); $draw->setFillColor ("none"); $draw->setStrokeWidth (4); $draw->setStrokeColor ("black"); $draw->setStrokeOpacity (0.9); $draw->setStrokeAntiAlias (true); $draw->bezier ($points); $im->drawImage ($draw); $im->writeImage ("IMG_$n.png"); $draw->destroy (); $im->destroy (); echo count ($points) . ", $n: <img src=\"IMG_$n.png\"><br>"; $n++; array_shift ($points); } ?>
How to use: <?php $width = 200; $height = 200; $border = 2; $img = new Imagick(); $img->newImage( $width, $height, new ImagickPixel( 'transparent' ) ); $draw = new ImagickDraw(); $draw->setStrokeColor( new ImagickPixel( 'black' ) ); $draw->setStrokeWidth( 2 ); $draw->setFillColor( new ImagickPixel( 'transparent' ) ); // will fail in an obscure manner if the input data is invalid $points = array ( array( 'x' => 0, 'y' => 200 ), array( 'x' => 0, 'y' => 0 ), array( 'x' => 200, 'y' => 200 ), array( 'x' => 200, 'y' => 0 ) ); $draw->bezier($points); $img->drawImage( $draw ); $img->setImageFormat( "png" ); header( "Content-Type: image/png" ); echo $img; ?>