## Broken Rotation

May 15, 2008Equation (3) of the Spherical Clipmaps paper is broken. Replace “cos… – sin…” in the first line with “cos… + sin…” and you’re done. Thanks to Ian Fisher for pointing this out.

- Comments
- Comments Off
- Categories
- Errata

The spherical clipmaps paper featured an error in the results section: The given frame rate was correct, but the number of triangles per frame was off by a factor of 10. I noted this inconsistency while preparing the slides for the conference next week, as the number of triangles doesn’t fit to the given resolution of the geometry: 512×20 steps = 10,240 quads = 20,480 triangles per level. So the correct results are:

- Fig. 15: 330,000 triangles (15 levels + center)
- Fig. 16: 140,000 triangles (6+1)
- Fig. 17: 100,000 triangles (4+1)

- Comments
- Comments Off
- Categories
- Errata