Re: [Visualpython-users] rotation of camera

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

What is there to squawk about? 90 radians is a completely legal angle.

Bruce Sherwood

Lenore Horner wrote:
> VPython doesn't have a radians command to turn degrees into radians?  
> Shouldn't it squawk when he uses an illegal command?
> 
> Lenore
> 
> On Apr 18, 2009, at 11:40 , Bruce Sherwood wrote:
> 
>> The angle used by rotations must be in radians, not degrees.
>>
>> You want ....rotate(angle=alfa*pi/180, ....
>>
>> Bruce Sherwood
>>
>> alessandro wrote:
>>> I want to rotate 90° around the center objects  with an animation. I
>>> tried this:
>>>
>>>
>>> from visual import *
>>> ball = sphere(pos=(-5,0,0), radius=0.5, color=color.red)
>>> wallR = box(pos=(6,0,0), size=(0.2,4,4), color=color.green)
>>> alfa=0
>>> while alfa < radians(90):
>>>    rate(20)
>>>
>>>    scene.forward = scene.forward.rotate(angle=alfa, axis=(0,1,0))
>>>
>>>    alfa += radians(1)
>>>
>>> both the sphere & box rotate but they rotate for not only for 90° but
>>> serveral time. Where is the error?
>>>
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>