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throw in python bindings if proj_transform fails

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This commit is contained in:
Dane Springmeyer 2011-04-14 02:09:24 +00:00
parent ff006dd3f0
commit 6549d090cc
1 changed files with 26 additions and 5 deletions
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31
bindings/python/mapnik_proj_transform.cpp
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@ -46,7 +46,12 @@ mapnik::coord2d forward_transform_c(mapnik::proj_transform& t, mapnik::coord2d c
double x = c.x;
double y = c.y;
double z = 0.0;
t.forward(x,y,z);
if (!t.forward(x,y,z)) {
std::ostringstream s;
s << "Failed to forward project "
<< c << " from " << t.source().params() << " to: " << t.dest().params();
throw std::runtime_error(s.str());
}
return mapnik::coord2d(x,y);
}
@ -55,23 +60,39 @@ mapnik::coord2d backward_transform_c(mapnik::proj_transform& t, mapnik::coord2d
double x = c.x;
double y = c.y;
double z = 0.0;
t.backward(x,y,z);
if (!t.backward(x,y,z)) {
std::ostringstream s;
s << "Failed to back project "
<< c << " from " << t.dest().params() << " to: " << t.source().params();
throw std::runtime_error(s.str());
}
return mapnik::coord2d(x,y);
}
mapnik::box2d<double> forward_transform_env(mapnik::proj_transform& t, mapnik::box2d<double> const & box)
{
mapnik::box2d<double> new_box = box;
t.forward(new_box);
if (!t.forward(new_box)) {
std::ostringstream s;
s << "Failed to forward project "
<< box << " from " << t.source().params() << " to: " << t.dest().params();
throw std::runtime_error(s.str());
}
return new_box;
}
mapnik::box2d<double> backward_transform_env(mapnik::proj_transform& t, mapnik::box2d<double> const & box)
{
mapnik::box2d<double> new_box = box;
t.backward(new_box);
if (!t.backward(new_box)){
std::ostringstream s;
s << "Failed to back project "
<< box << " from " << t.dest().params() << " to: " << t.source().params();
throw std::runtime_error(s.str());
}
return new_box;
}
}
}
void export_proj_transform ()