> On Jun 13, 2016, at 09:10 AM, Parkinbot <[hidden email]> wrote:
> but this produces some unwanted height changes in outputted frame sequence.
> Any idea? Is this a known bug?
It’s not a known problem.
Can you reproduce this with a trivial example and minimal # of frames?
I think everything works right if you set $vpt = [0,0,h] for any h. If you don't set $vpt, the z movement depends on the initial $vpt value which may be changed by interaction. I understand that $vpt is the center of the rotation set by $vpr.
> On Jun 13, 2016, at 20:57 PM, Parkinbot <[hidden email]> wrote:
> max() is a built-in function and should be known. But x is unknown and this
> issues a warning.
Built-in _function_, which is not syntactically correct to use here. It would need to be a module.
I agree that warnings messages probably shouldn’t eat into the 3D viewport.