Meeting Agenda Meeting Agenda| Date: | September 1, 2010 |
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| Location: | DC 1331 |
| Time: | 1:30 |
| Chair: |  Bill Cowan |
| Date: | September 8, 2010 | September 15, 2010 | September 22, 2010 | September 29, 2010 |
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| Location: | DC 1331 1:30 | DC 1331 1:30 | DC 1331 1:30 | DC 1331 1:30 |
| Chair: |  Elodie Fourquet |
 Eugene Greene |
 Marshall Hahn |
 Tiffany Inglis |
| Technical Presentation: | Bill Cowan |
Elodie Fourquet |
 Gabriel Esteves |
Eugene Greene |
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Marshall Hahn |
Title : Software Simulation of 5-Axis CNC Milling using Multidirectional Heightmaps
Abstract: Machinists often simulate a part program to verify its correctness, since mistakes can cause damage to the part, machine, yourself, or others. A popular approach for part program simulation involves representing the stock (the material the part is being carved from) as a heightmap. Although this approach is computationally fast and memory efficient, only objects that are representable as functional surfaces (e.g., z = f(x,y)) can be machined. A new heightmap-based data structure, called a multidirectional heightmap, does not have this limitation. A multidirectional heightmap, in response to an overhang, recursively subdivides itself until each piece can be represented by an axis-aligned heightmap. More precisely, a multidirectional heightmap is a kD-tree with the property that all cells are ``functional'': each cell contains a heightmap that represents a functional portion of the stock. In this talk, I will focus on the techniques used to minimize the total number of subdivision operations required. |
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