java - Compute Canvas3D preferredSize to fit content -

I have a Java 3D application where I'm displaying 3D models in canvas 3D. My canvas 3D is in a scrollpad and for this moment the canvas 3D has the default 800x600 favorite segment, which fits most models but some crops.

Is the canvas 3D an easy way to calculate the favorite sigmitt, so is it big enough to fit the whole model?

Thanks