| 14,7 → 14,7 |
|---|
| Winkelfunktionen sin, cos und arctan in |
| brute-force Art: Sehr Schnell, nicht sonderlich genau, aber ausreichend |
| Sinus Funktion von Nick666 vereinfacht |
| Stand 28.9.2007 |
| Stand 30.9.2007 |
| ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| */ |
| #include "main.h" |
| 24,7 → 24,7 |
|---|
| int arctan_i(long signed int x, long signed int y) |
| { |
| short int change_xy = 0; |
| signed int i; |
| long signed int i; |
| long signed int wert; |
| int return_value; |
| |
| 39,7 → 39,8 |
|---|
| // Quadranten ermitteln |
| |
| // Wert durch lineare Interpolation ermitteln |
| wert= abs((x*1000)/y); |
| if ((y == 0) && (x == 0)) wert =1; // Division durch 0 nicht erlaubt |
| else wert= abs((x*1000)/y); |
| |
| if (wert <=268) //0...0.0,268 entsprechend 0..15 Grad |
| { |
| 75,7 → 76,7 |
|---|
| // sinus Funktion: Eingabewert Winkel in Grad, Rueckgabe =sin(winkel)*1000 |
| signed int sin_i(signed int winkel) |
| { |
| short int m; |
| short int m,n; |
| |
| if (abs(winkel) >=360) winkel = winkel % 360; |
| if (winkel < 0) |
| 84,14 → 85,23 |
|---|
| winkel = abs(winkel); |
| } |
| else m = +1; |
| |
| n =1; |
| |
| // Quadranten auswerten |
| if ((winkel > 90 ) && (winkel <= 180)) winkel = winkel - 90; |
| else if ((winkel > 180 ) && (winkel <= 270)) winkel = winkel - 180; |
| else if ((winkel > 270) && (winkel <= 360)) winkel = winkel - 270; |
| if ((winkel > 90 ) && (winkel <= 180)) winkel = 180 - winkel; |
| else if ((winkel > 180 ) && (winkel <= 270)) |
| { |
| winkel = winkel -180; |
| n = -1; |
| } |
| else if ((winkel > 270) && (winkel <= 360)) |
| { |
| winkel = 360 - winkel; |
| n = -1; |
| } |
| // else //0 - 90 Grad |
| |
| winkel = pgm_read_word(&pgm_sinus[winkel]); |
| return (winkel*m); |
| return (winkel*m*n); |
| } |
| |