Yuu Kobayashi / AOTTrigon

AOT計算で呼び出し自体を早くする三角関数

Dependents:   NuMidi401 NuFM401

AOTTrigon.cpp@0:2888f1d9a23e, 2014-12-22 (annotated)

Committer:
kb10uy
Date:
Mon Dec 22 13:10:53 2014 +0000
Revision:
0:2888f1d9a23e
Child:
2:d8c9637a5f09
initial commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kb10uy 0:2888f1d9a23e 1 #include "AOTTrigon.h"
kb10uy 0:2888f1d9a23e 2
kb10uy 0:2888f1d9a23e 3 AOTTrigon::AOTTrigon(int divide) {
kb10uy 0:2888f1d9a23e 4 division = divide;
kb10uy 0:2888f1d9a23e 5 rate = division / (3.14159265358979323846264 * 2.0);
kb10uy 0:2888f1d9a23e 6 t_sin = new double[division];
kb10uy 0:2888f1d9a23e 7 for(int i = 0; i < division; i++)
kb10uy 0:2888f1d9a23e 8 t_sin[i] = sin((double)i / division * (3.14159265358979323846264 * 2.0));
kb10uy 0:2888f1d9a23e 9 }
kb10uy 0:2888f1d9a23e 10
kb10uy 0:2888f1d9a23e 11 inline double AOTTrigon::sine(double x) {
kb10uy 0:2888f1d9a23e 12 return t_sin[(int)(fmod(x,3.14159265358979323846264*2.0)*rate)];
kb10uy 0:2888f1d9a23e 13 }
kb10uy 0:2888f1d9a23e 14
kb10uy 0:2888f1d9a23e 15 inline double AOTTrigon::cosine(double x) {
kb10uy 0:2888f1d9a23e 16 return sine(x+3.14159265358979323846264/2.0);
kb10uy 0:2888f1d9a23e 17 }
kb10uy 0:2888f1d9a23e 18
kb10uy 0:2888f1d9a23e 19 inline double AOTTrigon::tangent(double x) {
kb10uy 0:2888f1d9a23e 20 return sine(x)/cosine(x);
kb10uy 0:2888f1d9a23e 21 }