Rhino 4 NURBS Solid Modeling Tutorial – Model a Webcam Step-by-Step
| Step 11 While still in the front view, disable Osnap, and turn grid Snap on. |
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| Step 12 Select the curves from step 10, and activate the Revolve command. Set the start of the revolve axis by entering 0, then set the end of the revolve axis by snapping to any grid intersection that lies directly above zero. Select the Fullcircle option. |
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| Step 13 Select the outer cross-shaped curve and activate the extrude curve command. Extrude the curve straight up so that the resulting surface is higher than the revolved surface from step 12. |
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| Step 14 Select the extruded surface and the outer revolved surface, then activate the Intersect command. This will create a curve on the revolved surface that traces all intersection points with the extruded surface. Now select and delete the extruded surface from Step 13. |
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| Step 15.a Select the intersection curve from step 14, then activate the Explode command. Select just one of the circular arcs (it doesn’t matter which). |
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| Step 15.b Enable Osnap with only the End option checked. Enable Ortho. Disable grid Snap. Use the Line command to draw straight lines pointing downward from both ends of the arc. Do this by Osnapping to the end for the first point, then use a length constraint of 1″ to drop the end of the line straight down 1″. |
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| Step 15.c Do this for both ends of the current arc, as well as the opposite arc. |
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| Step 16 Select each pair of vertical lines that are opposite one another, and activate the Loft command to create a surface between them. Use the default Loft options. |
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| Step 17.a Activate the EdgeSrf command. Select the two opposite arcs from step 15, as well as the top surface edges from the lofts in step 16 to define four sides of a surface. |
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| Step 17.b Now select the two lofts and the 4-edge surface and Join them. |
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| Step 18 Select the joined surface from step 17. In the top veiwport, activate the Scale1D command. Set the origin to 0. Add an angle constraint of 45 degrees to the first reference point by typing “<45,” then click in the lower right quardant of the viewport, outside the revolved surface. Drag the second reference point outward until the ends of the joined surface extend outside the revolved surface. |
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| Step 19 In the Top viewport, select the scaled surface from step 18. Activate the Rotate command. Type C or click the Copy option to rotate a copy of the selected surface. Set the center of rotation to 0. Set the angle to 90. |
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| Step 20 Select both rotated surfaces from step 19. Activate the Trim command. In the Perspective viewport, click on the inner and outer sections of the revolved surface that are underneath the arcs of the surfaces from step 19. Delete the surfaces that were used as cutting objects. |
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