Lock Axis when rotating camera

CesiumJS
1

Hi,

I am looking for the best approach in locking the y-axis. So that the camera rotates left and right only.

I have looked into

scene.getScreenSpaceCameraController().enableRotate = false;

But this locks all directions

Can we lock up and down?

Or is there some other way?

Thank you!

2

Lorenzo, I don’t personally know how to do it, but I’m bumping this so Dan can hopefully answer. If it’s not trivial, then I’ll write up a feature request, so that we don’t forget about it.

3

Hi Lorenzo,

There is no way to restrict the camera to rotate left and right only. You could add a custom render loop where you could do this:

// perform built in camera updates

scene.initializeFrame();

var camera = scene.getCamera();

// set the camera position to be in the plane of the equator

camera.position.z = 0.0;

// reset the direction to point towards the center of the earth

Cartesian3.negate(camera.position, camera.direction);

Cartesian3.normalize(camera.direction, camera.direction);

// orient so that ‘up’ is pointing north

Cartesian3.clone(Cartesian3.UNIT_Z, camera.up);

Cartesian3.cross(camera.direction, camera.up, camera.right);

// render scene

scene.render();

This code would only work in 3D. If you need help with 2D or Columbus view modes, let us know.

4

Hi Daniel,

I'm looking in to doing basically the same thing myself, for the purposes of making something comparable to a traditional desktop globe, tilted at an angle with a pivot through the poles.

It's been a few years, and I could see this being a feature which had been added in the mean-time. Is your method above still the best way to achieve this kind of effect?

Thanks,
Mat

5

Hello Mat,

I don’t think anything has been implemented to handle that type of functionality. The solution provided above should still work.

Best,

Hannah

6

Hi Hannah,

Ah, okay. The given solution seems a little rough (though that might just be my implementation!), but it works.

Thanks for letting me know!

Regards,
Mat

7

hello,
i am trying lock the axis so camera does not roll.
i want my camera to move left to right ant up and down (specially in VR mode). guyz please help this causes problem in my project.
Thank you

8

Is there a newer method for this function with the Cesium 1.43？

在 2013年8月16日星期五 UTC+8上午1:25:32，Lorenzo Campanis写道：

9

Not currently, I would still use the solution described above.

Thanks,

Gabby