Fit rotated object to a window

[callum]

I re-asked the question in a new post since I think a new approach is required

Fit the silhouette of a GLTF mesh to a window/viewport

I am asking this question again with a different context now that I understand the problem a bit more. I want to fit a GLTF mesh to the application viewport. I have been experimenting with bounding boxes, OBBs etc. but I have come to the conclusion I need a different approach since I want the “silhouette” to fit within the specified bounds and I think that’s different from trying to fit 3D geometry. I made a fiddle to illustrate what I mean - Edit fiddle - JSFiddle - Code Playground - the dif…