I need help with the attached image. I am trying to make a loop of rope that
will follow the path outlined in red. I know the radius of the blue and
green circles as well as their centers. I will create a macro that creates
a clipped torus for the curved top and bottom. I will connect these tori
with cylinders to form the straight sides.

My problem.....

1. What angle should I use to clip the tori?

Once I know this, I should be able to find the distances from the ends of
the clipped tori to get the length and angles of the cylinders.

Tim

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Attachments:
Download 'loop.jpg' (15 KB)

Preview of image 'loop.jpg'

In the attached picture, theta = acos((r2-r1)/d). The angle you're looking
for might be the complement of theta = asin((r2-r1)/d).

 - Slime
 [ http://www.slimeland.com/ ]

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Attachments:
Download 'conveyor.gif' (4 KB)

Preview of image 'conveyor.gif'

Nice work - and less than half an hour from post to post!
And for the smaller wheel its just theta-90 as opposed to 90-theta for the 
the large wheel.
DLM

"Slime" <fak### [at] emailaddress> wrote in message 
news:4248890f$1@news.povray.org...
> In the attached picture, theta = acos((r2-r1)/d). The angle you're looking
> for might be the complement of theta = asin((r2-r1)/d).
>
> - Slime
> [ http://www.slimeland.com/ ]
>
>
>

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