May I ask for some starting help?

 
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BrianOBrien



Joined: 05 Feb 2012
Posts: 2

PostPosted: Sun Feb 05, 2012 9:53 pm    Post subject: May I ask for some starting help? Reply with quote

I want to make a lens that is a cover of an LCD Display Segment.

I wish I could attach a bitmap image to this posting to describe the shape....

The lens cover is rectangular with the left and right side being semi circles.

Top View.
/-----------\
| |
\-----------/

Side View
/----------\
------------

I would imaging that this would be like revolving a log curve around the x-axis and reflecting it at width / 2.

How do I go about doing that?

Or could I define a bezier conic and revolve that about an axis?
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nextstep
Site Admin


Joined: 06 Jan 2007
Posts: 538

PostPosted: Sun Feb 05, 2012 11:28 pm    Post subject: Reply with quote

Hi,
I'm not sure about the right model you're looking for ( in the side view, I don't understand the bottom line "------------"). You can however try this isosurface at different grid resolution (61 for example) :


Code:
Name: Lens
F(): -if((abs(z)<0.5) & y<0,-((x*x + (y/0.1)*(y/0.1) + z*z - 1) ) ,(x^10 + y^10 +z^10 - 200000))
[x]: -1 , 1
[y]: -1 , 2
[z]: -.6 , .6
;


Save it as .k3ds file and load it in K3DSurf
NB: cut the "& y<0" part of the formula to have a shape like the top-view
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Cheers,
Abderrahman
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nextstep
Site Admin


Joined: 06 Jan 2007
Posts: 538

PostPosted: Sun Feb 19, 2012 12:37 pm    Post subject: Reply with quote

Hi,
Top View


Uploaded with ImageShack.us
Side View:


Uploaded with ImageShack.us


Uploaded with ImageShack.us

When we cut the "& y<0" part of the formula:


Uploaded with ImageShack.us
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Cheers,
Abderrahman
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