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.h@6:fddf871eba15, 2014-12-26 (annotated)

Committer:
kb10uy
Date:
Fri Dec 26 03:12:20 2014 +0000
Revision:
6:fddf871eba15
Parent:
5:2a67061cea78
Child:
7:eed80268ab34
wey

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kb10uy 0:2888f1d9a23e 1 #pragma once
kb10uy 0:2888f1d9a23e 2 #include "math.h"
kb10uy 0:2888f1d9a23e 3
kb10uy 0:2888f1d9a23e 4 /** AOTTrigon class
kb10uy 0:2888f1d9a23e 5 * AOT計算によって三角関数の計算を高速化します。
kb10uy 0:2888f1d9a23e 6 */
kb10uy 0:2888f1d9a23e 7 class AOTTrigon
kb10uy 0:2888f1d9a23e 8 {
kb10uy 0:2888f1d9a23e 9 public:
kb10uy 4:c15b45812c25 10 AOTTrigon();
kb10uy 0:2888f1d9a23e 11
kb10uy 3:ba78a1dd8b55 12 inline double sin(double);
kb10uy 3:ba78a1dd8b55 13 inline double cos(double);
kb10uy 3:ba78a1dd8b55 14 inline double tan(double);
kb10uy 0:2888f1d9a23e 15
kb10uy 0:2888f1d9a23e 16 private:
kb10uy 0:2888f1d9a23e 17 double *t_sin;
kb10uy 0:2888f1d9a23e 18 double rate;
kb10uy 3:ba78a1dd8b55 19 const double pi;
kb10uy 1:f1e55d228f6a 20 };
kb10uy 3:ba78a1dd8b55 21
kb10uy 3:ba78a1dd8b55 22 inline double AOTTrigon::sin(double x)
kb10uy 3:ba78a1dd8b55 23 {
kb10uy 4:c15b45812c25 24 return t_sin[((int)(x * rate)) & 0xFF];
kb10uy 3:ba78a1dd8b55 25 }
kb10uy 3:ba78a1dd8b55 26 inline double AOTTrigon::cos(double x)
kb10uy 3:ba78a1dd8b55 27 {
kb10uy 3:ba78a1dd8b55 28 return sin(x + pi / 2.0);
kb10uy 3:ba78a1dd8b55 29 }
kb10uy 3:ba78a1dd8b55 30 inline double AOTTrigon::tan(double x)
kb10uy 3:ba78a1dd8b55 31 {
kb10uy 3:ba78a1dd8b55 32 return sin(x) / cos(x);
kb10uy 3:ba78a1dd8b55 33 }