N K
/
GaNtroller
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priustroller_current
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N K
util/fastmath.cpp@55:f102d271e808, 2015-05-21 (annotated)
- Committer:
- nki
- Date:
- Thu May 21 02:19:25 2015 +0000
- Revision:
- 55:f102d271e808
- Parent:
- 11:dccbaa9274c5
still testing;
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| nki | 9:d3b70c15baa9 | 1 | #include "includes.h" |
| nki | 9:d3b70c15baa9 | 2 | #include "fastmath.h" |
| nki | 9:d3b70c15baa9 | 3 | #include "lut.h" |
| nki | 9:d3b70c15baa9 | 4 | |
| nki | 9:d3b70c15baa9 | 5 | float FastMath::FastSin(float theta) { |
| nki | 9:d3b70c15baa9 | 6 | if (theta < 0.0f) theta += 360.0f; |
| nki | 9:d3b70c15baa9 | 7 | if (theta >= 360.0f) theta -= 360.0f; |
| nki | 9:d3b70c15baa9 | 8 | return 2.0f * sinetab[(int) theta] - 1.0f; |
| nki | 9:d3b70c15baa9 | 9 | } |
| nki | 9:d3b70c15baa9 | 10 | |
| nki | 9:d3b70c15baa9 | 11 | float FastMath::FastCos(float theta) { |
| nki | 9:d3b70c15baa9 | 12 | return FastSin(90.0f - theta); |
| nki | 9:d3b70c15baa9 | 13 | } |
| nki | 9:d3b70c15baa9 | 14 | |
| nki | 9:d3b70c15baa9 | 15 | float FastMath::FastSin01(float theta) { |
| nki | 9:d3b70c15baa9 | 16 | return FastSin(theta) * 0.5f + 0.5f; |
| nki | 9:d3b70c15baa9 | 17 | } |
| nki | 9:d3b70c15baa9 | 18 | |
| nki | 9:d3b70c15baa9 | 19 | float FastMath::FastCos01(float theta) { |
| nki | 9:d3b70c15baa9 | 20 | return FastCos(theta) * 0.5f + 0.5f; |
| nki | 9:d3b70c15baa9 | 21 | } |