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DSP1/Rotate: Difference between revisions
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'''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. | '''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 === | === Input Parameters === | ||
Revision as of 01:34, 6 November 2023
| 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