Make lon in [-180, 180)
| 163 | |
| 164 | // Make lon in [-180, 180) |
| 165 | double LonIn180180(double lon) |
| 166 | { |
| 167 | if (lon >= 0) |
| 168 | return fmod(lon + 180.0, 360.0) - 180.0; |
| 169 | |
| 170 | // Handle the case of l = -180 |
| 171 | double const l = fmod(lon - 180.0, 360.0) + 180.0; |
| 172 | return l < 180.0 ? l : l - 360.0; |
| 173 | } |
| 174 | |
| 175 | // Map longitude: [-180, 180) -> [0, maxValue] |
| 176 | int LonToInt(double lon, int maxValue) |