Introduction
Extrude is a way to create 3d shapes from 2d shapes. The method shown here
creates separate shapes, such as boxes and cylinders. This may not be as efficient,
in terms of number of triangles, as using a single extrudeNode, but this method
has the advantage of being simpler, and it may be more suitable for games for
example, because it is easier to detect collision with these shapes than inside
a complex mesh.
For information about the alternative method using the extrudeNode see
here.
Steps
Start the program (see here for details of
how to load the program)
Insert a TransformGoup node. To do this click on 
to
show the 'insert view', then drag a transfornGroupBean from the insert view
to the tree view:
Close the insert view and add a 2D view:
It might help to rearrange the views so that they don't overlap:
Setup the 2D view by clicking on its 'info' button. This brings up a dialog
window, set the values as follows:
Mode: 3d from plan
Grid size: 20
Show grid - set to enabled.
Snap to grid - set to enabled.
Extrude height: set to 100.
Click on OK
In the 2D view draw some shapes, select the rectangle or circle, using the
buttons, and draw these shapes in the 2D view.
These shapes will appear in the tree view, each one under its own transformGroup.
The shapes can also also be seen in the 3D view as they are drawn. In the 3D
view select which view you want, also you may need to press fit button 
to make sure the camera is pointing at the shape.
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| Correspondence about this page |
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Book Shop - Further reading.
Where I can, I have put links to Amazon for books that are relevant to
the subject, click on the appropriate country flag to get more details
of the book or to buy it from them.
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Commercial Software Shop
Where I can, I have put links to Amazon for commercial software, not
directly related to this site, but related to the subject being discussed,
click on the appropriate country flag to get more details of the software
or to buy it from them.
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Can you help?
Please send me any improvements to
here. I would appreciate ideas to make the pages more useful including
error correction, ideas for new pages, improvements to wording. It helps
if you quote the full URL of the page.
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progam
I am working on a project which uses these principles, if you would like
to help me with this you are welcome to join in, here:
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http://sourceforge.net/projects/mjbworld/
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This site may have errors. Don't use for critical systems.
Copyright (c) 1998-2008 Martin John Baker - All rights reserved.
