solved [SOLVED] BABYLON.Vector3.Project returning NaN

[Tim_Rosskamp]

Hey,

I have a problem with the function Project function inside the Vector3 class.

This is my code:

var screenXY = BABYLON.Vector3.Project(
    new BABYLON.Vector3(10, 10, 10),
    BABYLON.Matrix.Identity(),
    scene.getTransformMatrix(),
    camera.viewport.toGlobal(engine.getRenderWidth(true), engine.getRenderHeight(true))
);

What I want to do is get the 2d screen x/y position from a 3d vector.

 

And this is what gets returned from the function:

Vector3 {x: NaN, y: NaN, z: NaN}

 

How can I fix this?

[RaananW]

Howdy @Tim_Rosskamp,

is it by anc chance the first frame of the scene? In this case - just wait for the second one

Simple example here - https://www.babylonjs-playground.com/#6XQZ4P

The first frame is nan, probably because of the transformation matrix, but after everything is set, it is calculated correctly.

[Tim_Rosskamp]

Dude, thanks a lot!

This was indeed the problem! 

I only used the function once when the component mounts and didn't tested it in the render loop.