Impossible to draw because CGAL_USE_BASIC_VIEWER is not defined

问题

I tried the following example of draw_polyhedron:

https://doc.cgal.org/latest/Polyhedron/Polyhedron_2draw_polyhedron_8cpp-example.html

but there is the following error :

Impossible to draw because CGAL_USE_BASIC_VIEWER is not defined.

I tryied to add #define CGAL_USE_BASIC_VIEWER but the error is still existing

回答1:

I solved it by adding to ‍‍‍‍‍.pro file:

QMAKE_CXXFLAGS +=-DCGAL_USE_BASIC_VIEWER
LIBS+=-DCGAL_USE_BASIC_VIEWER

来源：https://stackoverflow.com/questions/53150670/impossible-to-draw-because-cgal-use-basic-viewer-is-not-defined