Limiting free camera movement up or down

[Hagop]

Hi

I have applied a freecamera to my project.

camera = new BABYLON.FreeCamera("FreeCamera", new BABYLON.Vector3(-40, cameraHeight,-132), scene);

I have applied gravity to it so that it won't fly

ie: camera.applyGravity = true;

I have given it a constant height (cameraHeight)

 

scene.registerBeforeRender(function () {
                    scene.activeCamera.position.y = cameraHeight;

});

 

Now the problem is that when I move the mouse up and down along the Y axis the camera rotates (in essence on the x-axis). So the camera is elevated and it's like flying.I have checked the ESPILIT demo and it's the same problem (Espilit.babylon has camera gravity enabled).

 

So is there a command which limits the rotation of the free camera up and down (or left and right) ?

If I need to calculate the rotation in registerBeforeRender then my 2nd question, can I stop a camera?

[iiceman]

Tried something like that already?

scene.registerBeforeRender(function () {    camera.rotation.x = 0;})

http://www.babylonjs-playground.com/#E0QUF

[Hagop]

iiceman: this disables rotation completely. Any idea or command how to limit it?

[iiceman]

On the playground example I can still rotate the camera to the left and to the right... what do you mean with "disabled completely"? like only look a bit up and a bit down? Like that http://www.babylonjs-playground.com/#E0QUF#1 ?

[Buzul]

On 11/23/2015 at 11:54 AM, iiceman said:

Tried something like that already?

scene.registerBeforeRender(function () {    camera.rotation.x = 0;})

http://www.babylonjs-playground.com/#E0QUF

@iiceman you are the legend ..  Thanks for this old post...

[Mark Bufton]

I use a similar thing to limit the positions of drag drop meshes (called within the onPointerMove) with a limit function

function limit(mesh,xMin,xMax,yMin,yMax,zMin,zMax){

    if (mesh.position.x < xMin){

        mesh.position.x = xMin;

    }

    //Repeat for all arguments

}

With a little tweaking to refer to the camera and rotations and calling it in the registerBeforeRender, I'm sure you'd be able to limit the camera's rotation to anything you like.