All Projects → flutter-food → Beziercurve

flutter-food / Beziercurve

Licence: apache-2.0
Bezier curve master

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BezierCurve

百度百科: 贝塞尔曲线(Bézier curve),又称贝兹曲线或贝济埃曲线,是应用于二维图形应用程序的数学曲线。一般的矢量图形软件通过它来精确画出曲线,贝兹曲线由线段与节点组成,节点是可拖动的支点,线段像可伸缩的皮筋,我们在绘图工具上看到的钢笔工具就是来做这种矢量曲线的。贝塞尔曲线是计算机图形学中相当重要的参数曲线,在一些比较成熟的位图软件中也有贝塞尔曲线工具,如PhotoShop等。在Flash4中还没有完整的曲线工具,而在Flash5里面已经提供出贝塞尔曲线工具。

设计图效果--设计图地址

开发效果图

贝塞尔曲线画圆

如图当画圆时系数M约等于0.55228475,绘制时调用cubicTo(p1.x,p1.y,p2.x,p2.y,p3.x,p3.y)进行绘制,绘制时以圆心为圆点,x轴、y轴为线划分成4分,进行绘制。

分享一个贝塞尔曲线在线演示网站

项目地址

后续

在UI中国上看到了一个不错的设计,里面也涉及贝塞尔曲线全手势操作灯的demo,这里的贝塞尔曲线p2、p4的Y轴向中间做一个伸缩就可以。

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