Function behind the mouse wheel scroll

Hi,

The camera actually dollies – you can see how its coordinates change with some puzzles.

Orthographic camera, on the other hand, stays at the same position and expands its view volume instead.

Hi Crunch,

Is this a requirement to use a non-control camera? I’m asking because it can be easier to use an orbit camera with some of its controls disabled. For example, with the following code you can disable all camera movements except zooming:

function runCode(app) {
    // add your code here, e.g. console.log('Hello, World!');

    app.controls.enableRotate = false;
    app.controls.enablePan = false;
}

The orbit camera also has some useful options like zoom speed and zoom inertia to control dolly movement. Although, it’s not available in puzzles, only as javascript API.

On the other hand moving an orbit camera manually is a bit different from a non-control one because you need to take into account the position of the camera’s pivot point, but there’s some useful puzzles for that in the Camera section, e.g. “look at” or “tween camera”. Also, if your application requires the camera to be animated by using Blender/Max baked actions or if you need to apply some arbitrary rotations to the camera then it’s probably better to stick to a non-control one, because the orbit control system imposes some constraints and would be inconvenient in those situations.

Crunch wrote:

Can we replicate something like Google Maps in verge with some existing camera modifications?

Yes, I think it’s definitely possible, and the NC camera probably suits better for that since you need to do several custom changes.

I made an example demo with zooming via puzzles which is similar to how the orbit camera behaves: zoom.zip.
To achieve the same zooming as for orbit cameras you still need to have some sort of a focal or a pivot point, for example in the demo I specified some initial distance (regarding your application it would be the distance to the plane which the camera is perpendicular to). So, it works in the following way: if the camera is just 1 meter away from some pivot point it zooms in or out relatively slow, but at a distance of 10 meters it moves faster.
The camera in the example also has some additional settings like speed and inertia, so you can play with them to see which setup is better for your app.