Rhino 4 NURBS Solid Modeling Tutorial – Model a Webcam Step-by-Step
| Step 31 In the Top viewport, turn on grid Snap, and deactivate Osnap. Activate the Rectangle command. Select the Center option by clicking or typing ‘C’, then select Rounded by clicking or typing R. The center of the rectangle should be 0. The corner of the rectangle should be placed at the grid intersection three units to the left and one unit up from the center. For the radius point, snap to the grid intersection that is three units to the left of the origin. |
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| Step 32 Select the rounded rectangle from step 31. Activate the ExtrudeCrv command. Set the Cap option to Yes. Extrude the curve so that it intersects through the sphere bottoms above it. |
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| Step 33 Select both the joined surface and the extruded rectangle. Activate the Boolean2Objects command. Click through the left mouse button to see the different iterations. Click until the rounded rectangle has carved an empty space from the middle of the sphere-bottoms. Hit Enter. |
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| Step 34 Turn off grid Snap and Ortho. Turn on Planar. Turn on Osnap, but make sure all the boxes are unchecked. Enable the Strack option only. Draw a shape similar to an invered numeral 1. In the Right viewport, Activate the Polyline command. Start the first point slightly to the right of the Z-axis and a bit above the rim of the joined surface. Hold down shift to draw the second part directly below the first. Keep using shift to draw horizontal and vertical lines. When you get to the second-to-last point, Snap briefly to the first point. This will create a SmartTrack line to indicate when the second-to-last point is even with the first. Use the Strack line while holding shift to set the point, then Snap to the first point to close the shape. |
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| Step 35 Activate grid Snapping. Select the shape created in step 34, then activate the Revolve command. Set the start and end points by Snapping to two grid inersections that both lie on the Z-axis. Select the Fullcircle option. |
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| Step 36 Make sure grid Snap is still activated. In the Top viewport, activate the Sphere command, and start the center of a sphere 1″ above the X-axis and 1″ to the right of the Y-axis. Set the radius of the sphere to 0.025″. |
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| Step 37.a Turn on Osnap and select the Cen and Quad options. Activate the OrientOnSrf command. Select the sphere from step 36 as the object. Set Reference point 1 by snapping to the Cen of the sphere. |
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| Step 37.b Set Reference point 2 by snapping to one of the four isocurve intersections adjacent to the sphere’s center. |
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| Step 37.c Select the top of the joined surface as the Surface to orient on. A dialog box will appear. Leave the settings at default and hit OK. |
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| Step 37.d Set the Point on surface to orient to by snapping OnSrf to a point on the outer surface of the joined surface. Be careful not to select the lower surface! |
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| Step 38 In the Top viewport, select the sphere from step 37. Activate the ArrayPolar function. Set the center of the array to 0. Set the number of items to somewhere around 30-75. Set the angle to fill to 360. |
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| Step 39.a Activate the BooleanDifference command. Set the joined surface as the first set. |
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| Step 39.b Set all the spheres from step 38 as the second set by click-dragging in any view to select them all. |
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| Step 40 Turn on grid Snap and Osnap with Quad selected. Activate the Sphere command and draw a sphere from three points like in step 26. The first two points are the opposing Quads on the upper revolved surface. The third point is the point with world coordinates (0,0,3) ['w0,0,3'] |
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