Rhino 4 NURBS Solid Modeling Tutorial – Model a Webcam Step-by-Step
| Step 41 Select the solid base and revolved piece from step 35 and activate the Hide command. |
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| Step 42 Turn off Osnap and make sure grid Snap is still on. From the Top viewport, activate the Box command. Click Center or type ‘C’ to draw a box from the centerpoint. Snap to the grid origin to define the first point. For the length, type ‘4′. For the width, type ‘0.1′. For the Height, type ‘4′. |
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| Step 43 From the Top viewport, select the box from step 42. Copy and paste it in it’s location. Click and drag the pasted box one unit up. Copy and paste the original box again, and this time drag it one unit down. |
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| Step 44 Turn on Osnap with only the Cen option active. Make sure grid Snap is on. In the Right viewport, select the three boxes from step 43. Activate the Rotate command, and click on Copy or type C to duplicate the boxes. Snap to the center of the sphere from step 40 to set the cener of rotation. Set the angle of rotation to 90. |
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| Step 45 Select the sphere from step 40, then activate the BooleanDifference command. Select all of the boxes as the second set of polysurfaces. |
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| Step 46 Disable Osnap, and make sure grid Snap is on. In the Right viewport, activate the Sphere command. Snap to the grid intersection at the center of the cut-up sphere to set the center-point. Now turn grid Snap off. To set the radius, hold down shift and move the cursor straight up from the center-point. Set the radius so that the sphere’s surface is about half a grid unit from the cut-up shpere’s surface. |
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| Step 47 Select the sphere from step 46 and all the sphere chunks from step 45. Activate the BooleanUnion command. |
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| Step 48 Disable Osnap, and make sure grid Snap is on. In the Right viewport, activate the Circle command. Set the center of the circle by snapping to grid inersection at the cener of the sphere from step 47. Set the Radius to .5″. In the Top viewport, click and drag the circle to move it one inch to the left. |
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| Step 49 With the circle from step 48 still selected, activate the ExtrudeCrv command. Click on Cap or type ‘C’ to create a capped solid extrusion. Extrude the curve to the left so that it extends through the surface of the sphere from step 47. |
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| Step 50 Select the sphere from step 47. Activate the BooleanDifference command. Select the extruded cylinder from step 49 as the second set of polysurfaces. |
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