Zoom in/out with a orthographic camera

[SideraX]

Hi

 

I'm tying to build a 3D RPG with an isometric view (hobby project). So far i'm experimenting with the camera of the framework.

 

There is a way of zoom in or out with a orthographic camera ?

 

(I'm still lacking of 3D knowledge but i'm learning, BabylonJS is a great start for a newbie like me, good job )

[Dad72]

Hi,

 

You can use camera.fov  for the zoom in and out.

function zoomIntOut(event){    if(event.delta > 0) {       camera.fov += 0.1;    }    else if(event.delta < 0) {            camera.fov -= 0.1;    }}

[SideraX]

Hi.

 

Changing the fov didn't change anything on my scene :/

After looking at BABYLON.Camera's code, it seems to be used only for the perspective mode.

 

Anyway I was just messing with the cameras, it was  mainly for learning. At the moment I will use the perspective mode with a 30° angle.

[Temechon]

I'm using a zoom in/out for an orthographic camera in my current project, but badly I don't have the code right now.

If you don't mind waiting several hours, I will post my code asap tomorrow morning

 

Cheers !

[Temechon]

Hi ! Here is my code. Basically, the orthographic view is recomputed for each wheel movement. 

/** * Zoom / dezoom in 2D view * @param {int} direction The mouse scroll (120 = one tick on scroll) */zoom2DView = function(direction) {    var zoom = direction / 120;    topCamera.orthoLeft += zoom *1.4;    topCamera.orthoRight -= zoom *1.4;    topCamera.orthoBottom += zoom *0.9;    topCamera.orthoTop -= zoom *0.9;};

[SideraX]

Nice

 

My intuition was telling me that this properties were the solution but I couldn't make it work ^^

 

Thanks !

[Wingnut]

By the way, welcome to the forum and team, SideraX!  Your question and Temechon's information will help us improve our tutorial #5 - about babylon.js cameras.  Thanks!  (I work on 'the playpen series' tutorials quite often.  Now you do the same.) 

 

Also, keep us posted on your project.  Start a thread about it... keep publishing experiments and previews, and telling us your plans and thoughts.  Even post links to basic and simple scenes, zips, adventures, mistakes, discoveries, 3D art.  We love it!  And again, welcome.  I'm Wingnut, newbie, mad scientist, toy abuser, and the biggest mouth on the forum.  Glad you are with us!

[gogoulor]

Please see my approach

http://www.babylonjs-playground.com/#753B9U#1

best regards