ImagickDraw::pathLineToRelative

(PECL imagick 2.0.0)

ImagickDraw::pathLineToRelative — Draws a line path

Description

bool ImagickDraw::pathLineToRelative ( float $x , float $y )

Warning

This function is currently not documented; only its argument list is available.

Draws a line path from the current point to the given coordinate using relative coordinates. The coordinate then becomes the new current point.

Parameters

x: starting x coordinate
y: starting y coordinate

Return Values

No value is returned.

Коментарии

Apr 11

Автор: Axeia


Hope this of help of anything, I had one hell of a time to draw a simple pie slice, where in GD2 is very easily done with the 'arc' function.. this is a bit harder to do in imagick.



The degrees are a mess, seems like the path, arc and ellipse functions all use a different system.. utterly confusing.

Code below should at least be of help in understanding how it works.



For an example of the output, please see: 

http://www.imagebam.com/image/8e0ca432393602

<?php

    function getPointOnCircumference( $widthOfCircle, $heightOfCircle, $degrees, $x = 0, $y = 0 )

    {

        return array( 

            'x' => $x + ($widthOfCircle/2)  * sin( deg2rad( $degrees ) ),

            'y' => $y + ($heightOfCircle/2) * cos( deg2rad( $degrees ) )

        );

    }

    

    $width  = 200;

    $height = 200;

    $border = 2;

    $x = $width / 2;

    $y = $height / 2;

    $im = new Imagick();

    $im->newImage( $width, $height, "orange", "png" );

    

    

    $draw = new ImagickDraw();

    $draw->setFillColor( 'lime' );

    $draw->setStrokeColor( new ImagickPixel( 'black' ) );

    $draw->setStrokeWidth( 2 );

    $draw->arc( 0, 0, ($width-$border), ($height-$border), 270, 360  ); //270 till 360 degrees

    $im->DrawImage( $draw );

    

    $draw2 = new ImagickDraw();

    $draw2->setFillColor( 'red' );

    $draw2->setStrokeColor( new ImagickPixel( 'black' ) );

    $draw2->setStrokeWidth( 2 );

    $draw2->ellipse( 100, 100, $x-$border, $y-$border, 0, 90 );         //0 till 90 degrees

    $im->DrawImage( $draw2 );

    

    $draw3 = new ImagickDraw();

    $draw3->setFillColor( 'navy' );

    $draw3->setStrokeColor( new ImagickPixel( 'white' ) );

    $draw3->setStrokeWidth( 2 );

    $draw3->pathStart();

      $degrees90  = getPointOnCircumference( $width-2*$border,$height-2*$border, 360  );

      $degrees180 = getPointOnCircumference( $width-2*$border,$height-2*$border, 270 );

      $draw3->pathMoveToRelative( $x, $y ); //Move 'pencil' to middle of image.

      $draw3->pathLineToRelative(  $degrees90['x'],  $degrees90['y'] );

      $draw3->pathEllipticArcRelative( $width-$border, $height-$border, 0, false, true, $degrees180['x'], $degrees180['y']-$y+$border );

    $draw3->pathClose();

    $im->DrawImage( $draw3 );    

    

    header( "Content-Type: image/png" );

    echo $im;

?>