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Numerical instability fix

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This commit is contained in:
Martin Tůma 2018-04-17 22:26:20 +02:00
parent e34800b8d1
commit c50e41dea1
1 changed files with 2 additions and 1 deletions
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3
src/map/onlinemap.cpp
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@ -8,6 +8,7 @@
#define TILE_SIZE 256 #define TILE_SIZE 256
#define EPSILON 1e-6
static QPointF ll2m(const Coordinates &c) static QPointF ll2m(const Coordinates &c)
{ {
@ -36,7 +37,7 @@ static qreal zoom2scale(int zoom)
static int scale2zoom(qreal scale) static int scale2zoom(qreal scale)
{ {
return (int)log2(360.0/(scale * (qreal)TILE_SIZE)); return (int)(log2(360.0/(scale * (qreal)TILE_SIZE)) + EPSILON);
} }