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THE ADVANCED CSG-WORKOUT
So far we have heard about the DIFFERENCE-operation. In the following section we will create some ornaments for the temple using varous CSG-operations. |
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Creating new shapes with CSG-objects
· The first ornament will be a compass-rose-like star with a half-sphere in the center. When finished, this deco is to be placed into the front-top-box aligned to the two columns in the middle. For an example of how this rose will look like, check out the picture below ... 
· A short study of this object-bundle leads us to the conclusion, that the following objects are neccessary to build this ornament: A - eight half-spheres to build the leaves of the rose (massively scaled and rotated), B - one half-sphere for the eye in the middle and C - one cylinder which will operate as a modifyer in the upcoming CSG-grouping. |
The leaves
· As you look at the picture, you will recognize, that the four leaves have the shape of lenses. But how to model lenses, when there is no such command in POVLAB ? That's the reason, we use CSG for this. Follow the step-by-step-guide to create your first CSG-ornament. Step 1 - create a new scene using the command »file« | »new« or by using the empty template-scene, we have already created. Step 2 - maximize the front-view and zoom in until three grid-units fill out the whole screen (is it advisable, to zoom to the coordinate- systems center). Step 3 - switch to the other viewports using the keys »2« and »3« and repeat the zooming- procedure. After that, return to the front-view. Step 4 - create a »1/2 Sphere« using the appropriate command from the »Objects«-menu. Step 5 - rotate the shape 90° around the X-axis, so that the cone is pointing out of the screen. Step 6 - in a short, but excessive »freehand-scale« reduce the width of the shape to a ca. 1/2 grid-unit and the height of the shape to ca. 1 grid-unit. Step 7 - switch to the left-view and scale the depth to ca. 1/5 of one grid-unit (this has not to be very precisely). · If you want the exact values for the shape, well here they are ... Scale X: 0.270 Y: 0.195 Z: 0.450 Rotate X: 90,000 Y: 0.000 Z: 0.000(continued on next page) |
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