How to determine the render volume?

[jrbcast]

Hi

I want to draw a cube containing all the objects in my scene. How can I determine the bounds for it?.

Of course it must be as small as posible :-)

Thanks

[Rob The Bloke]

run through each vertex, store the maximum x,y & z you find as well as the minimum values. You then have two points representing the volume in which all primitives are contined.

Add them both together and divide by two to get the centre.....