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Inserting a torus
· The only things left in our scene, are the four toruses. A torus is like a ring-shaped tube. The thickness of the tube in the X- and Z-direction is given by two parameters the »outer« and the »inner«-diameter. An additional value determines the height in the Z-direction. · Before we create the torus, you should switch to the »top-viewport« (full-screen-mode), because we need the torus lying parallel to the shaft. Now we select the »Torus«-item from the »objects«-menu and position the crosshair cursor on the coordinates [X:0, Z:0] (the Y-parameter is not needed in the moment). · Clicking on these coordinates starts the torus-construction, and a circle for the outer radius is displayed. You can alter the radius by moving the mouse. · The actual size is not so important, because we will set the precise values in the manual-setup dialog again. Nevertheless you should give the torus an outer diameter of slightly more than two grid units (ca. 2.5 grid units will do). After you have done this, you can lock the outer diameter with a mouse-click. · After this mouse-click, you can set the inner diameter in the same way as described above (a size of ca. 1.5 grid units is recommendable). In the next step, POVLAB asks for the name of the torus (e.g. »Col01_BigTor01«) and places the object into scene. |
· As you can see, the torus has to be adjusted to the shaft. For this purpose we start the manual-setup-dialog and enter the following values: Scale X: [1.28], Scale Y: [0.125], Scale Z: [1.28], Translate X: [0.0], Translate Y: [-2.572] and Translate Z: [0.0]. You can also translate the torus with the mouse, though this is not as precisely as the manual setup.
· The next thing to do, is to copy the first torus and place it underneath the top-box. The only difference to the bottom torus is the »Translate Y:«-value, which has to be set to [-2.572]. Finishing the column · Now we have only two objects left: the smaller toruses. Since the shape is almost the same, we can continue to copy one of the existing toruses (let's start with the bottom-torus). After you have copied the bottom torus, enter the following values in the manual setup DB: Scale X: [1.15], Scale Y: [0.10], Scale Z: [1.15], Translate X: [0.0], Translate Y: [-2.355] and Translate Z: [0.0]. For the last torus we will copy the small one, which we created a moment ago. In the manual setup, the translate-values should then be set to: Translate X: [0.0], Translate Y: [2.355] and Translate Z: [0.0]. IMPORTANT: Now, as you have finished the first complex object, it's about time to save the scene. Alternatively you can download the scene-file TCOLUMN.ZIP. |
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