Created
May 13, 2015 01:39
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double精度の波形出力(sin, square, pulse)
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/* description: 波形情報をメモリではなく全て演算ベースにする新音源用のメモ */ | |
/* とりあえず、サイン波、矩形波、ノコギリ波のみ */ | |
/* ノイズ発生装置は後回し */ | |
#include <math.h> | |
#define PI 3.1415926535897932 | |
#define PI2 6.2831853071795864 | |
double calcwav_sin(double r) | |
{ | |
return sin(r); | |
} | |
double calcwav_square(double r) | |
{ | |
r=fmod(r,PI2); | |
if(r<0.0) r+=PI2; | |
if(r<PI) return 1.0; | |
return -1.0; | |
} | |
double calcwav_pulse(double r) | |
{ | |
r=fmod(r,PI2); | |
if(r<0.0) r+=PI2; | |
r/=PI; | |
r-=1.0; | |
return r; | |
} |
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