我有一个位置向量:
var startPos = new THREE.Vector3(1.2, -2.34, 0.5);
一个方向向量:
var direction = new THREE.Vector3(0.657873735, -0.2497291683, 0.71051916);
还有一个距离:
var distance = 1;
如何计算一个新的位置向量,从startPos
开始,沿着direction
移动distance
?
我有一个位置向量:
var startPos = new THREE.Vector3(1.2, -2.34, 0.5);
一个方向向量:
var direction = new THREE.Vector3(0.657873735, -0.2497291683, 0.71051916);
还有一个距离:
var distance = 1;
如何计算一个新的位置向量,从startPos
开始,沿着direction
移动distance
?
var startPos = new THREE.Vector3(1.2, -2.34, 0.5);
var direction = new THREE.Vector3(0.6578737359955765, -0.24972916834682138, 0.710519166466616);
var distance = 1;
var newPos = new THREE.Vector3();
newPos.addVectors ( startPos, direction.multiplyScalar( distance ) );