How i get xyz axis projection to vector of screen

[mike_mike]

As title.

In three.js, i use ArcballControls to control my camera.

I want to get the xyz axis vector2 correspond my screen.

As below image ,i would get xAxis = {x:1,y:-1}, yAxis={x:-1,y:5}, zAxis={x:-5,y:-1}

Thanks all.

[tfoller]

You can use Vector3.project(camera) function to project world axes to ndc space, where you can consider near plane of ndc cube to be your screen.

Edit fiddle - JSFiddle - Code Playground

[mike_mike]

i resolve it!!!
thanks!!!