[Visualpython-users] VPython render efficiency

[Ting L. <dri...@gm...>]

Hi, fans,

I'm a newbie.

VPython is really easy to use. But it looks too simple.
I wonder if there is a parameter to customize the number of faces used
to draw a sphere (or cylinder ...)? I cannot find it. By default,
VPython draws a pretty smooth sphere, I guess the number of slice
should be larger than 50.

Sphere(pos=(*,*,*),color=color.red)

However, low polygon objects are needed. This control is necessary to
make smooth animation, especially when the number of objects is large.

I know VPython gives a way to build object by user, face.
But can the authors make life easier?

Another question is also about the rendering efficiency.
I don't know if VPython uses gllist internally. (sorry, haven't
studied the source) ,and if VPython support object 'instance'? (A
instance of an object doesn't need to rebuild the vertex array at a
new position but just copy the vertex from the original object and
perform translation, scale, or zoom. )

Ting