sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

expose more coordinate transform methods, allowing projecting box2d<double> into screen coordinates at the same time as reprojecting geographical coordinates

Browse source
This commit is contained in:
Dane Springmeyer 2010-06-08 20:27:28 +00:00
parent 13d192f255
commit f5ed4305f4
1 changed files with 28 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
include/mapnik/ctrans.hpp
View file

@ -186,6 +186,20 @@ public:
return c;
}
inline box2d<double> forward(const box2d<double>& e,proj_transform const& prj_trans) const
{
double x0 = e.minx();
double y0 = e.miny();
double x1 = e.maxx();
double y1 = e.maxy();
double z = 0.0;
prj_trans.backward(x0,y0,z);
forward(&x0,&y0);
prj_trans.backward(x1,y1,z);
forward(&x1,&y1);
return box2d<double>(x0,y0,x1,y1);
}
inline box2d<double> forward(const box2d<double>& e) const
{
double x0 = e.minx();
@ -197,6 +211,20 @@ public:
return box2d<double>(x0,y0,x1,y1);
}
inline box2d<double> backward(const box2d<double>& e,proj_transform const& prj_trans) const
{
double x0 = e.minx();
double y0 = e.miny();
double x1 = e.maxx();
double y1 = e.maxy();
double z = 0.0;
backward(&x0,&y0);
prj_trans.forward(x0,y0,z);
backward(&x1,&y1);
prj_trans.forward(x1,y1,z);
return box2d<double>(x0,y0,x1,y1);
}
inline box2d<double> backward(const box2d<double>& e) const
{
double x0 = e.minx();