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1 Rhino Tutorial Modeling a trackball mouse in Rhino 3 on Sat Sep 25, 2010 9:19 pm

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If you discovered this Rhinoceros 3D tutorial page through a direct link or search engine, please note that you're on page 3 of the tutorial! Please complete the previous page first if you haven't done so.
This is how it looks like in perspective view.

Select the two bottom curves and press join.
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We will scale this curve using scale2D.

As start point, choose a point +- in the middle of the curve, using grid snap to snap to the X-axis.

Turn on "copy=yes" (like we did with the rotate command)

The second click should also be on the X-axis, to the right and outside of the curve.

Then by dragging you will see the curve getting smaller. Drag until your curve looks something like the red one in the image.
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Perspective view:[You must be registered and logged in to see this image.]
Now we will draw two lines which will be used as cross sections in a 2 rail sweep.

Draw a line with end and int snap turned on. You can do this in perspective view. Click on the point as in the image:
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Then click here:[You must be registered and logged in to see this image.]
This is our first line.[You must be registered and logged in to see this image.]
Do exaxtly the same on the other side so you'll have this.

It's very important to use the object snaps!!!
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Now go to 'surface---sweep 2 rails'. You need to select the rail curves: select the scaled curve and the edge of our surface. Then you need to select the cross section curves: select the two small straight lines we just created in the previous steps. Press enter.

A dialog box will pop up with some options. Check the 'closed sweep' option and press ok. The sweep will be created.
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In right view it looks like this:

I find this a bit too sharp.
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I pressed undo several times to get back to the point before I did the sweep two rails.

Turn on control points for the two straight lines and select the bottom points and the bottom curve and move them all a bit lower in front view.

Now you need to do the two rail sweep again.
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This is the result:

Select the sweep surface and the top surface and press the join button.
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