php-doc-en/reference/imagick/imagickdraw/pathcurvetoquadraticbeziersmoothrelative.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="imagickdraw.pathcurvetoquadraticbeziersmoothrelative">
 <refnamediv>
  <refname>ImagickDraw::pathCurveToQuadraticBezierSmoothRelative</refname>
  <refpurpose>Draws a quadratic Bezier curve</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>ImagickDraw::pathCurveToQuadraticBezierSmoothRelative</methodname>
   <methodparam><type>float</type><parameter>x</parameter></methodparam>
   <methodparam><type>float</type><parameter>y</parameter></methodparam>
  </methodsynopsis>
  &warn.undocumented.func;
  <para>
   Draws a quadratic Bezier curve (using relative coordinates) from the
   current point to (x, y). The control point is assumed to be the reflection
   of the control point on the previous command relative to the current point.
   (If there is no previous command or if the previous command was not a
   DrawPathCurveToQuadraticBezierAbsolute, 
   DrawPathCurveToQuadraticBezierRelative, 
   DrawPathCurveToQuadraticBezierSmoothAbsolut or 
   DrawPathCurveToQuadraticBezierSmoothRelative, assume the control point is
   coincident with the current point). At the end of the command, the new
   current point becomes the final (x, y) coordinate pair used in the
   polybezier.
  </para>
  
  <para>
   This function cannot be used to continue a cubic Bezier curve smoothly. It can only continue from a quadratic curve smoothly.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>x</parameter></term>
     <listitem>
      <para>
       ending x coordinate
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>y</parameter></term>
     <listitem>
      <para>
       ending y coordinate
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>

 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.void;
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>
     <methodname>ImagickDraw::pathCurveToQuadraticBezierSmoothRelative</methodname>
    </title>
    <programlisting role="php">
     <![CDATA[
<?php
$draw = new \ImagickDraw();

$draw->setStrokeOpacity(1);
$draw->setStrokeColor("black");
$draw->setFillColor("blue");

$draw->setStrokeWidth(2);
$draw->setFontSize(72);

$draw->pathStart();
$draw->pathMoveToAbsolute(50,250);

// This specifies a quadratic bezier curve with the current position as the start
// point, the control point is the first two params, and the end point is the last two params.
$draw->pathCurveToQuadraticBezierAbsolute(
    150,50, 
    250,250
);

// This specifies a quadratic bezier curve with the current position as the start
// point, the control point is mirrored from the previous curves control point
// and the end point is defined by the x, y values.
$draw->pathCurveToQuadraticBezierSmoothAbsolute(
    450,250
);

// This specifies a quadratic bezier curve with the current position as the start
// point, the control point is mirrored from the previous curves control point
// and the end point is defined relative from the current position by the x, y values.
$draw->pathCurveToQuadraticBezierSmoothRelative(
    200,-100
);

$draw->pathFinish();

$imagick = new \Imagick();
$imagick->newImage(700, 500, $backgroundColor);
$imagick->setImageFormat("png");

$imagick->drawImage($draw);

header("Content-Type: image/png");
echo $imagick->getImageBlob();
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

</refentry>

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