2023年2月2日 · 圆弧方法.arc() 使用方式和原来学习过的圆弧曲线 ArcCurve 整体相似，区别在于圆心定位方式有差异。 圆弧.arc() 参数的圆心坐标是相对当前.currentPoint 而言,而不是坐标原点。 下面代码绘制了一个矩形+扇形的轮廓，圆心在 (100, 0),半径50。 // 下面代码绘制了一个矩形+扇形的轮廓，圆心在(100, 0),半径50。 const shape = new THREE.Shape(); . 另一种写法：直线和圆弧起点之间的缺口threejs内部会自动补上. // 下面代码绘制了一个矩形+扇形的轮廓，圆心 …

In mathematics, an arc is defined as a portion of the boundary of a circle or a curve. It can also be referred to as an open curve. The boundary of a circle is the perimeter or the distance around a circle, also known as the circumference. So, the arc is the distance between any two points traced along its circumference.

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