ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute

(PECL imagick 2, PECL imagick 3)

ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute — Draws a quadratic Bezier curve

说明

public ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute(float $x, float $y): bool

Draws a quadratic Bezier curve (using absolute 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.

参数

x: ending x coordinate
y: ending y coordinate

返回值

没有返回值。

范例

示例 #1 ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute() example


<?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();
?>

add a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址：https://www.php.net/manual/en/imagickdraw.pathcurvetoquadraticbeziersmoothabsolute.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP mkdir()写出来的权限与mode值不符合 Packagist / Composer 中国全量镜像支持php7的性能采集扩展 adodb连接mysql多个数据库的问题 php $_SERVER中的SERVER_NAME 和HTTP_HOST的区别

略微加速

PHP官方手册 - 互联网笔记

ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute

说明

参数

返回值

范例

User Contributed Notes