THREE.JS：无法旋转相机

Question

I need my camera to look behind (the x=0,z=0 are in the middle of the pong table) how can i do it? ( i tried to change everything on camera.lookAt) camera look front

scene = new THREE.Scene();
    scene.id=1;
    camera = new THREE.PerspectiveCamera(75, w / h, 0.1, 1000);
    camera.lookAt(0,0,0);
    camera.position.set(0, 3.75, -5);

Answer 1

You need to change the order of your operations. When you initialize a new camera, its position is automatically (0, 0, 0) and when you do .lookAt(0, 0, 0) it probably doesn't know what to do because you're telling it to look at the same point where it already is!

Just do .lookAt() after setting position:

camera = new THREE.PerspectiveCamera(75, w / h, 0.1, 1000);
camera.position.set(0, 3.75, -5); // Change position FIRST
camera.lookAt(0, 0, 0); // Then tell it to look at origin