屏幕坐标转世界坐标:
let pX = (screenPoint.x / this.scene.renderer.domElement.clientWidth) * 2 - 1;
let pY = - (screenPoint.y / this.scene.renderer.domElement.clientHeight) * 2 + 1;
//通过调用Vector3的unproject()方法(只有vector3能使用)
//注:pX, pY介于 -1 到1之间
let p = new THREE.Vector3(pX, pY, -1).unproject(this.scene.camera)
return new THREE.Vector2(p.x,p.y);
世界坐标转屏幕坐标
let projector = new THREE.Projector();
let world_vector = new THREE.Vector3(0,0,1);
let vector = projector.projectVector(world_vector,this.scene.camera);
let halfWidth = window.innerWidth / 2,
halfHeight = window.innerHeight / 2;
return {
x: Math.round(vector.x * halfWidth + halfWidth),
y: Math.round(-vector.y * halfHeight + halfHeight)
};
threejs 世界坐标与屏幕坐标相互转换
原文地址：https://www.cnblogs.com/brainworld/p/8309415.html