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Modeling a trackball mouse with Rhino 3D - tutorial p3

 

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This is how it looks like in perspective view.

Select the two bottom curves and press join.
Rhinoceros 3D tutorial

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.

Rhinoceros 3D tutorial

Perspective view:

Rhinoceros 3D tutorial

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:

Rhinoceros 3D tutorial

Then click here:

Rhinoceros 3D tutorial

This is our first line.

Rhinoceros 3D tutorial

Do exactly the same on the other side so you'll have this.

It's very important to use the object snaps!!!

Rhinoceros 3D tutorial

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.

Rhinoceros 3D tutorial

In right view it looks like this:

I find this a bit too sharp.

Rhinoceros 3D tutorial

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.

Rhinoceros 3D tutorial

This is the result:

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

Rhinoceros 3D tutorial
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