Yuu Kobayashi
AOT計算で呼び出し自体を早くする三角関数
Diff: AOTTrigon.cpp
- Revision:
- 0:2888f1d9a23e
- Child:
- 2:d8c9637a5f09
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/AOTTrigon.cpp Mon Dec 22 13:10:53 2014 +0000
@@ -0,0 +1,21 @@
+#include "AOTTrigon.h"
+
+AOTTrigon::AOTTrigon(int divide) {
+ division = divide;
+ rate = division / (3.14159265358979323846264 * 2.0);
+ t_sin = new double[division];
+ for(int i = 0; i < division; i++)
+ t_sin[i] = sin((double)i / division * (3.14159265358979323846264 * 2.0));
+}
+
+inline double AOTTrigon::sine(double x) {
+ return t_sin[(int)(fmod(x,3.14159265358979323846264*2.0)*rate)];
+}
+
+inline double AOTTrigon::cosine(double x) {
+ return sine(x+3.14159265358979323846264/2.0);
+}
+
+inline double AOTTrigon::tangent(double x) {
+ return sine(x)/cosine(x);
+}
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