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Use sprintf to decompose the degrees, minutes, and seconds

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Instead of repeatedly multiplying by 100, which can cause
epsilon errors to grow to too significant magnitudes.
This commit is contained in:
Mat Sutcliffe
2020-12-08 21:02:19 +00:00
parent 50eebb799d
commit 40362c1f4a
2 changed files with 15 additions and 7 deletions
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13
src/blackmisc/pq/angle.cpp
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@@ -73,13 +73,12 @@ namespace BlackMisc
dms *= -1.0;
}
values.deg = CMathUtils::trunc(dms);
dms = CMathUtils::fract(dms) * 100;
values.min = CMathUtils::trunc(dms);
dms = CMathUtils::fract(dms) * 100;
values.sec = CMathUtils::trunc(dms);
dms = CMathUtils::fract(dms);
values.fractionalSec = CMathUtils::round(dms, 6);
char chars[16];
std::sprintf(chars, "%014.10f", dms); // 000.0000000000
values.deg = stringToInt(chars, chars + 3);
values.min = stringToInt(chars + 4, chars + 6);
values.sec = stringToInt(chars + 6, chars + 8);
values.fractionalSec = stringToInt(chars + 8, chars + 14) / 1000000.0;
return values;
}