从2d点到3d点绘制橡皮筋

Question

我试图从鼠标坐标绘制橡皮带转换为3d点，rubberband link我附加了它的工作代码。

1. 橡皮筋在拉动时为什么会旋转？

geometry.vertices[0] = new THREE.Vector3(startPoint.x, startPoint.y, startPoint.z);
geometry.vertices[1] = new THREE.Vector3(endPoint.x, startPoint.y, startPoint.z);
geometry.vertices[2] = new THREE.Vector3(endPoint.x, endPoint.y, startPoint.z);
geometry.vertices[3] = new THREE.Vector3(startPoint.x, endPoint.y, startPoint.z);
geometry.vertices[4] = new THREE.Vector3(startPoint.x, startPoint.y, startPoint.z);

任何人都可以提出他们的建议，我的代码出了什么问题？。