Camera question

[freetoplay]

Is there a way to adjust the camera to assure that the mesh is always within the canvas, when using AssetManager to load the mesh? I have been having issues such as this:

 

http://www.babylonjs-playground.com/#TT2BK1

 

[brianzinn]

You can do some math and adjust camera.fov (and direction/target/alpha/beta).

scene.activeCamera.fov = 2.5;

I tried to see the bounding box to be able to programatically calculate the FOV, but maybe at least that camera property will help you get one step further.  Once you have a bounding box, you can do some math to have that all in the camera frustum.

[freetoplay]

Do you know where I can find the math required to have the mesh to be within the camera frustum? The thing is I want to display different models, without the need to manually position the camera for each one of them. Not sure if that is possible.

[brianzinn]

Here is how you fit a plane exactly in the frustum - it's a playground from Jerome.  That's the math for a plane.
https://playground.babylonjs.com/#UJWGY4#1

What I've done is that once you get your bounding box then you can work backwards.  I have done moving the camera backwards, so everything was in the frustum.  Here's a PG that I did that moves the camera (based on http://www.html5gamedevs.com/topic/31367-solved-determine-camera-distance-to-make-mesh-fit/ ) :

https://www.babylonjs-playground.com/#P6JAWE#11

Another option is to do isCompletelyInFrustum() - using mesh or camera, but again, you will need a bounding box... here is a PG that I made as well that explores that way.  I think you could do scaling and keep the positions of both the same.
https://playground.babylonjs.com/#050P3M
 

I was going to make you a PG, but I don't know how to get the bounding box from your mesh without calculating it from position vectors manually.  I think it might be a mesh._children[0] on the duck.  There are some posts how to get the bounding box on groups of imported meshes - I think you are going to need that first.

Anyway, as you can see - once you know how big the mesh is there are various ways to accomplish what you are after.

[freetoplay]

This seems to have worked perfectly, thank you so much!