Size of this preview: 750 × 600 pixels. Other resolutions: 300 × 240 pixels | 600 × 480 pixels | 960 × 768 pixels | 1,280 × 1,024 pixels.
Original file (1,280 × 1,024 pixels, file size: 240 KB, MIME type: image/png)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
| Description | This simple, non-convex polyhedron is constructed so that none of its 24 vertices can be seen from a region around its center. This counterexample shows that placing observers at each vertex is not a solution to the 3-dimensional generalization of the art gallery problem. This image shows a view from the center of the polyhedron towards one of the corners. Observe that no vertices (marked with black balls) are visible: they're all hidden behind the yellow faces, just beyond the edge of the triangular gap through which the red face can be seen. | ||
| Date | |||
| Source | Self-made using POV-Ray 3.6 for Windows. | ||
| Author | Ilmari Karonen | ||
| Permission (Reusing this file) |
|
||
| Other versions |
|
.png)
.png)
.png){kind=link}
.png&action=edit&redlink=1){kind=link}
.png){kind=link}
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:03, 6 November 2007 | | 1,280 × 1,024 (240 KB) | Ilmari Karonen | {{Information |Description=This simple, non-convex polyhedron is constructed so that none of its 12 vertices can be seen from a region around its center. This counterexample shows that placing observers at each vertex is not a solution t |
File usage
The following page uses this file:
.png){kind=link}