Diff: table.cpp

Revision:

0:0cf44de8ff17

Child:

1:c3f079780229

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/table.cpp	Tue Mar 21 02:04:02 2017 +0000
@@ -0,0 +1,86 @@
+#include "math.h"
+#include "mbed.h"
+
+class table{
+public:
+  table(int times);
+  ~table();
+  void SIN_table(void);
+  void COS_table(void);
+  void make_table(double (*fnc)(int));
+  double show(int num);
+  double deg(double degree);
+  double rad(double radian);
+private:
+  double *ans;
+  int number;
+};
+table::table(int times){
+  number = times;
+}
+table::~table(){
+  free(ans);
+}
+void table::SIN_table(void){
+  ans = (double*)malloc(sizeof(double)*number+1);
+  //ans = new double[sizeof(double)*number+1];
+  if(ans == NULL) exit(1);
+  for(int i=0;i<number+1;i++){//[0]~[number]
+    ans[i] = sin(M_PI*i*2.0/number);
+  }
+}
+void table::COS_table(void){
+  ans = (double*)malloc(sizeof(double)*number+1);
+  for(int i=0;i<number+1;i++){
+    ans[i] = cos(M_PI*i*2.0/number);
+  }
+}
+void table::make_table(double (*fnc)(int)){
+  ans = (double*)malloc(sizeof(double)*number+1);
+  for(int i=0;i<number+1;i++){
+    ans[i] = fnc(i);
+  }
+}
+double table::show(int num){
+  return ans[num];
+}
+double table::deg(double degree){
+  double sa_db=0.0;
+  int sa_int=0;
+  double degree_abs =0.0;
+  int degree_int=0;
+  if(degree<0) degree_abs = labs(degree);
+  else degree_abs = degree;
+  if(degree_abs>360){
+    degree_int = degree/360;
+    degree = degree - degree_int*360;
+  }
+  if(degree<0) degree = degree+360;
+  sa_db = number*0.5*degree/180;
+  sa_int = sa_db;
+  return ans[sa_int];
+  //return ans[sa_int];
+  //return sa_db;
+}
+double table::rad(double radian){
+  double sa_db;
+  int sa_int;
+  double radian_abs;
+  int radian_int;
+  radian = radian/M_PI;
+
+  if(radian<0) radian_abs = labs(radian);
+  else radian_abs = radian;
+
+  if(radian_abs>2.0){
+    radian_int = radian/2.0;
+    radian = radian - radian_int*2.0;
+  }
+
+  if(radian<0) radian = radian+2.0;
+
+  sa_db = number*radian*0.5;
+  sa_int = sa_db;
+  sa_db = ans[sa_int];
+  return sa_db;
+}