avaxman / libhedra

A library providing functionality for the geometric processing of polygonal(non-triangular) meshes.

libhedra - Polygonal and Polyhedral Mesh Processing

libhedra is a C++ library for creating, manipulating and visualizing polygonal (non-triangular) and polyhedral (with flat faces) meshes. See (website)[https://avaxman.github.io/libhedra] for more details.

libhedra's Issues

"modeling_affine" compiling and segfault issues

When I first tried to compile the affine modelling example under Manjaro Linux, I ran into another issue that seemed to be a typo, where line 57 seems to be missing the "extend" argument:
"hedra::point_spheres(bc, sphereRadius, sphereGreens, 10, false, sphereV, sphereT, sphereTC);"
After adding that argument, the compiler completes successfully. However the moment I press any mouse button aside from the left, the program crashes with this:

Program received signal SIGSEGV, Segmentation fault.
0x000055555585f613 in void Eigen::DenseCoeffsBase<Eigen::Matrix<double, 1, 3, 1, 1, 3>, 1>::copyCoeff<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> >(long, Eigen::DenseBase<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> > const&) ()

GDB's backtrace shows this:

0x000055555585f613 in void Eigen::DenseCoeffsBase<Eigen::Matrix<double, 1, 3, 1, 1, 3>, 1>::copyCoeff<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> >(long, Eigen::DenseBase<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> > const&) ()
(gdb) bt
#0 0x000055555585f613 in void Eigen::DenseCoeffsBase<Eigen::Matrix<double, 1, 3, 1, 1, 3>, 1>::copyCoeff<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> >(long, Eigen::DenseBase<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> > const&) ()
#1 0x0000555555852f92 in Eigen::internal::assign_LinearTraversal_CompleteUnrolling<Eigen::Matrix<double, 1, 3, 1, 1, 3>, Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const>, 0, 3>::run(Eigen::Matrix<double, 1, 3, 1, 1, 3>&, Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> const&) ()
#2 0x000055555584547d in Eigen::internal::assign_impl<Eigen::Matrix<double, 1, 3, 1, 1, 3>, Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const>, 1, 2, 0>::run(Eigen::Matrix<double, 1, 3, 1, 1, 3>&, Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> const&) ()
#3 0x0000555555834fb6 in Eigen::Matrix<double, 1, 3, 1, 1, 3>& Eigen::DenseBase<Eigen::Matrix<double, 1, 3, 1, 1, 3> >::lazyAssign<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> >(Eigen::DenseBase<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> > const&) ()
#4 0x00005555558257a9 in Eigen::Matrix<double, 1, 3, 1, 1, 3>& Eigen::PlainObjectBase<Eigen::Matrix<double, 1, 3, 1, 1, 3> >::lazyAssign<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> >(Eigen::DenseBase<Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3> const> > const&) ()
#5 0x0000555555816467 in Eigen::internal::assign_selector<Eigen::Matrix<double, 1, 3, 1, 1, 3>, Eigen::CwiseUnaryOp<Eigen::internal::scalar_cast_op<float, double>, Eigen::Matrix<float, 1, 3, 1, 1, 3>

...This happens whether or not I use true or false on that second boolean, so this might be unrelated to the compiler error...

question about Platform set

why can't this code run at vs 2017?

Missing #include <fstream>in polygonal_read_OFF

I am gonna fix it but I add the issue to remember to do it ;-)

dual_mesh may crash

In certain situations dual_mesh crashes and the issues seems to be related to wrong entries in sd.starVertices. Example meshes were sent using different channels (copy righted). The used subdivision was hedra::LINEAR_SUBDIVISION.