Three.JS 从世界坐标系转换到屏幕坐标系

Three.JS 从世界坐标系转换到屏幕坐标系

转载lvmy的个人博客， http://lvmy.iteye.com/blog/1849030 

js代码如下：

var projector = new THREE.Projector();var world_vector = new THREE.Vector3(0,0,1);var vector = projector.projectVector(world_vector, camera);var halfWidth = window.innerWidth / 2;var halfHeight = window.innerHeight / 2;var result = {x: Math.round(vector.x * halfWidth + halfWidth),y: Math.round(-vector.y * halfHeight + halfHeight)};