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DSP1/Rotate: Difference between revisions
From SnesLab
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=== References === | === References === | ||
* [https://archive.org/details/SNESDevManual/book2/page/n298 Page 3-5-8 of Book II] of the official Super Nintendo development manual | * [https://archive.org/details/SNESDevManual/book2/page/n298 Page 3-5-8 of Book II] of the official Super Nintendo development manual | ||
* paragraph 6.8 on [https://archive.org/details/SNESDevManual/book2/page/n324 page 3-6-1 of Book II], lbid. | |||
[[Category:DSP1]] | [[Category:DSP1]] | ||
Revision as of 23:20, 3 January 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Opcode | 0C | ||||||
| Speed | 64 cycles
8.6 μs | ||||||
Rotate is a DSP1 command that rotates a two-dimensional point counterclockwise about the origin. Page 3-2-1 of the manual states that Rotate takes 65 cycles, which is one more than the sum on page 3-5-8.
Input Parameters
- θ is the angle of rotation about the Z axis
- x1 is the x coordinate before rotation
- y1 is the x coordinate before rotation
Output Parameters
- x2 is the x coordinate after rotation
- y2 is the y coordinate after rotation
See Also
References
- Page 3-5-8 of Book II of the official Super Nintendo development manual
- paragraph 6.8 on page 3-6-1 of Book II, lbid.