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AP_Declination: fixed rounding in mag field 

thanks to Angela for noticing this
This commit is contained in:
Andrew Tridgell 2021-09-02 16:59:53 +10:00
parent b331921bc9
commit 907d044c89
1 changed files with 2 additions and 2 deletions
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4
libraries/AP_Declination/AP_Declination.cpp
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@ -37,8 +37,8 @@ bool AP_Declination::get_mag_field_ef(float latitude_deg, float longitude_deg, f
bool valid_input_data = true; bool valid_input_data = true;
/* round down to nearest sampling resolution */ /* round down to nearest sampling resolution */
int32_t min_lat = static_cast<int32_t>(static_cast<int32_t>(latitude_deg / SAMPLING_RES) * SAMPLING_RES); int32_t min_lat = static_cast<int32_t>(static_cast<int32_t>(floorf(latitude_deg / SAMPLING_RES)) * SAMPLING_RES);
int32_t min_lon = static_cast<int32_t>(static_cast<int32_t>(longitude_deg / SAMPLING_RES) * SAMPLING_RES); int32_t min_lon = static_cast<int32_t>(static_cast<int32_t>(floorf(longitude_deg / SAMPLING_RES)) * SAMPLING_RES);
/* for the rare case of hitting the bounds exactly /* for the rare case of hitting the bounds exactly
* the rounding logic wouldn't fit, so enforce it. * the rounding logic wouldn't fit, so enforce it.