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On 10/06/2011 11:38 AM, Tops wrote:
> Hi Stephen
>
> This is great, thanks so much for the time you've spent on this.
>
My pleasure and it was an old file.
> However, is there any way to do this animation solely in POVRAY as I have
> absolutely no idea how to use Bishop3D and really don't have the time to learn a
> new program.
>
What you want to do is not trivial. I thought that if you could see how
I did it it would give you some ideas.
--
Regards
Stephen
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On 6/3/2011 12:47 AM, Tops wrote:
> Hi all
>
> I am trying to draw a simple small-to-large gear mechanism, driven by a cam
> belt.
>
> I have trawled the web, modified what I found and got so far with the gear:
>
...
>
> However, I have no idea how I am going to draw the cam belt which will link this
> gear with another larger one. I can sort out distances and sizes of the gears,
> no problem, but the belt I have no idea.
>
> To add to this, I need the belt to at least appear to be moving as the gears
> move. Is this possible?
>
> Any help would be great!!!!
>
> Cheers
Hi,
A set of macros exist which may help you. Check out this page:
http://mops.pagesperso-orange.fr/atelier05.html
I've used the givebelt macro a couple of times, and it works very
well... plus you can animate it. I hope this helps~
Sam
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Thanks, Sam and Stephen for all the time you've spent on this!
Much appreciated!
I've got it working now thanks to you guys!
Cheers
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On 27/06/2011 4:11 PM, Tops wrote:
> Thanks, Sam and Stephen for all the time you've spent on this!
>
> Much appreciated!
>
> I've got it working now thanks to you guys!
>
> Cheers
>
And don't forget to post your WIPs then the final version.
--
Regards
Stephen
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Christian Froeschlin <chr### [at] chrfr de> wrote:
> Tops wrote:
>
> > However, I have no idea how I am going to draw the cam belt which will link this
> > gear with another larger one. I can sort out distances and sizes of the gears,
> > no problem, but the belt I have no idea.
>
> Regarding the basic geometry, I think you are looking for
> the "common tangent for two circles" problem, which is slightly
> more tedious to solve than I initially thought, see e.g.
>
> http://www.cut-the-knot.org/Curriculum/Geometry/TangentTwoCirclesI.shtml
> http://www.askiitians.com/iit-jee-coordinate-geometry/common-tangents.aspx
> http://www.phpfreaks.com/forums/index.php?topic=189971.0
>
> With such points you can make a very simple model using two boxes
> for the straight part and two cylinder shells (differences) from which
> you cut out an angled wedge (cylinder intersected with 2 planes?).
> Once you get that working then you can start worrying how the belt
> should be constructed physically and how it fits with cogs.
>I think it would be wise if you consider the method provided in photoshop
>You can simply do it with the add other image and geometrically
>attach it to the overlapping circles
>https://railwayrecruitmentgov.in/rpf-constable-admit-card-2018/
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