Re: [Visualpython-users] Patch for limiting zoom in vpython

[Gavrie P. <ga...@ne...>]

Bruce Sherwood wrote:
> 
> --On Thursday, November 16, 2000, 2:48 PM +0200 Gavrie Philipson
> <ga...@ne...> wrote:
> 
> > The patch adds a new attribute to "display" objects. The attribute is
> > named "zoom_limit", and is a float value.
> > In Python, you can now say: visual.scene.zoom_limit = 10.0, for example.
> 
> Could you please write a sentence or two of documentation? What does a
> limit of 10.0 mean? Thanks.

Hi Bruce,

The only documentation needed is the line you quoted above -- the change
is pretty small.
But, some more explanation:

There is a parameter in the gldevice.cpp file named 'manual_scale'.
There is no documentation for this parameter that I could find -- maybe
the authors of VPython would like to put in a word. All my patch does is
set a maximum limit for this parameter. 
A limit if 10.0 means that the maximum value this manul_scale parameter
can attain is 10.0.
I can't explain the exact physical meaning of this parameter.

Cheers,

Gavrie.

-- 
Gavrie Philipson
Netmor Applied Modeling Research Ltd.