ImagickDraw::pathCurveToQuadraticBezierSmoothRelative
(PECL imagick 2.0.0)
ImagickDraw::pathCurveToQuadraticBezierSmoothRelative — Draws a quadratic Bezier curve
Description
bool ImagickDraw::pathCurveToQuadraticBezierSmoothRelative ( float $x , float $y )Warning
This function is currently not documented; only its argument list is available.
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.
This function cannot be used to continue a cubic Bezier curve smoothly. It can only continue from a quadratic curve smoothly.
Parameters
x
ending x coordinate
y
ending y coordinate
Return Values
No value is returned.
Examples
Example #1 ImagickDraw::pathCurveToQuadraticBezierSmoothRelative()
<?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();
?>← ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute
ImagickDraw::pathCurveToRelative →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
