visualpython-users

[Visualpython-users] Rotating a helix about its axis.

[Kelvin C. <kel...@uv...>]

Hello;

I'd like to do a little animation of a bacterial flagella, and  
consequently I'd like to rotate a helix about its axis.  It appears  
that the helix object does not support rotations.

Is there a clever way (or I guess, a brute-force way?) of getting  
around this problem?

Thanks very much.

-k


--
Department of Physics, Cook Building, University of Vermont
82 University Place, Burlington VT 05405-0125
http://www.uvm.edu/~kchu/; (802) 656-0064; Fax: (802) 656-0817

Re: [Visualpython-users] Rotating a helix about its axis.

[Bruce S. <Bru...@nc...>]

Thanks for pointing out this bug. Here are two work-arounds:

1) Put the helix in a frame, and rotate the frame object.

2) Rotate the axis of the helix:

	h = helix()
	h.axis = rotate(h.axis, angle=pi/2., axis=(0,0,1))

Bruce Sherwood

Kelvin Chu wrote:
> Hello;
> 
> I'd like to do a little animation of a bacterial flagella, and 
> consequently I'd like to rotate a helix about its axis.  It appears that 
> the helix object does not support rotations.
> 
> Is there a clever way (or I guess, a brute-force way?) of getting around 
> this problem?
> 
> Thanks very much.
> 
> -k
> 
> 
> --
> Department of Physics, Cook Building, University of Vermont
> 82 University Place, Burlington VT 05405-0125
> http://www.uvm.edu/~kchu/; (802) 656-0064; Fax: (802) 656-0817