| 57,7 → 57,6 |
|---|
| 7834, 7875, 7913, 7949, 7982, 8013, 8041, 8068, 8091, 8112, 8131, 8147, \ |
| 8161, 8172, 8181, 8187, 8191, 8192}; |
| |
| //double c_cos_8192(int16_t angle) |
| int16_t c_cos_8192(int16_t angle) |
| { |
| int8_t m,n; |
| 86,6 → 85,33 |
|---|
| return (sinus * m * n); |
| } |
| |
| int16_t c_sin_8192(int16_t angle) |
| { |
| int8_t m, n; |
| int16_t sinus; |
| |
| // avoid negative angles |
| if (angle < 0) |
| { |
| m = -1; |
| angle = -angle; |
| } |
| else m = +1; |
| |
| // fold angle to interval 0 to 359 |
| angle %= 360; |
| |
| // check quadrant |
| if (angle <= 90) n = 1; // first quadrant |
| else if ((angle > 90) && (angle <= 180)) {angle = 180 - angle; n = 1;} // second quadrant |
| else if ((angle > 180) && (angle <= 270)) {angle = angle - 180; n = -1;} // third quadrant |
| else {angle = 360 - angle; n = -1;} //fourth quadrant |
| // get lookup value |
| sinus = sinlookup[angle]; |
| // calculate sinus value |
| return (sinus * m * n); |
| } |
| |
| // ---------------------------------------------------------------------------------------------- |
| |
| |