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15 lines
273 B
C++
15 lines
273 B
C++
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#include <QLineF>
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#include "map.h"
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qreal Map::resolution(const QRectF &rect)
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{
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qreal cy = rect.center().y();
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QPointF cl(rect.left(), cy);
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QPointF cr(rect.right(), cy);
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qreal ds = xy2ll(cl).distanceTo(xy2ll(cr));
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qreal ps = QLineF(cl, cr).length();
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return ds/ps;
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}
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