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+ changed operator* and operator/ behaviour as per #206

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This commit is contained in:
Artem Pavlenko 2009-02-01 12:15:30 +00:00
parent 5f0385b80a
commit fbb102b975
1 changed files with 17 additions and 11 deletions
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28
src/envelope.cpp
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@ -307,21 +307,27 @@ namespace mapnik
template <typename T>
Envelope<T>& Envelope<T>::operator*=(T t)
{
minx_ *= t;
miny_ *= t;
maxx_ *= t;
maxy_ *= t;
return *this;
coord<T,2> c = center();
T sx = 0.5 * width() * t;
T sy = 0.5 * height() * t;
minx_ = static_cast<T>(c.x - sx);
maxx_ = static_cast<T>(c.x + sx);
miny_ = static_cast<T>(c.y - sy);
maxy_ = static_cast<T>(c.y + sy);
return *this;
}
template <typename T>
Envelope<T>& Envelope<T>::operator/=(T t)
{
minx_ /= t;
miny_ /= t;
maxx_ /= t;
maxy_ /= t;
return *this;
coord<T,2> c = center();
T sx = 0.5 * width() / t;
T sy = 0.5 * height() / t;
minx_ = static_cast<T>(c.x - sx);
maxx_ = static_cast<T>(c.x + sx);
miny_ = static_cast<T>(c.y - sy);
maxy_ = static_cast<T>(c.y + sy);
return *this;
}
template class Envelope<int>;