three.js - 沿着 THREE.Line 或两个向量绘制箭头助手

Question

是否可以用两个向量(x1，y1，z1)(x2，y2，z2)绘制箭头助手，请对此提出建议和指导。

提前谢谢...

Answer 1

您可以像这样从 2 个向量中获取方向并创建箭头助手

var from = new THREE.Vector3( 2, 2, 2 );
var to = new THREE.Vector3( 0, 0, 0 );
var direction = to.clone().sub(from);
var length = direction.length();
var arrowHelper = new THREE.ArrowHelper(direction.normalize(), from, length, 0xff0000 );
scene.add( arrowHelper );

Js fiddle 工作 http://jsfiddle.net/pardo/bgyem42v/3/