Skip to main content

Fighting with a template error (as usual)

I would like to make a program with OpenMesh (http://www.openmesh.org). I tried to test some examples that worked while ago, but now they don't work by the following compile error (template instantiation).
/usr/X11R6/bin/g++ -Wp,-MD,Ubuntu9.04/VisOMTriMeshDNode.dep -DHAVE_SSTREAM -DUSE_GMU_GERR -std=c++0x -Wall -Wnon-virtual-dtor -Woverloaded-virtual -DARCH_LINUX-DCOMP_GCC -I/usr/X11R6/include -I/usr/X11R6/include -I/usr/include/tcl8.4 -I/usr/include/qt4 -I/usr/include/qt4/QtCore -I/usr/include/qt4 -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtNetwork -I/usr/include/qt4/QtOpenGL -I/opt/OpenMesh/src -I/home/project/shared_proj -fPIC -g -Wno-uninitialized -D_INCTEMP -DUSE_GMU_GERR -DGMU_DBG_STRIPPATH=\"ALL\" -o Ubuntu9.04/VisOMTriMeshDNode.o -c VisOMTriMeshDNode.cc
/usr/include/c++/4.3/ext/new_allocator.h: In member function 'void __gnu_cxx::new_allocator<_Tp>::construct(_Tp*, _Args&& ...) [with _Args = long int, _Tp = OpenMesh::BaseProperty*]':
/usr/include/c++/4.3/bits/stl_vector.h:703:   instantiated from 'void std::vector<_Tp, _Alloc>::push_back(_Args&& ...) [with _Args = long int, _Tp = OpenMesh::BaseProperty*, _Alloc = std::allocator]'
/opt/OpenMesh/src/OpenMesh/Core/Utils/PropertyContainer.hh:104:   instantiated from 'OpenMesh::BasePropHandleT OpenMesh::PropertyContainer::add(const T&, const std::string&) [with T = OpenMesh::Attributes::StatusInfo]'
/opt/OpenMesh/src/OpenMesh/Core/Mesh/BaseKernel.hh:133:   instantiated from 'void OpenMesh::BaseKernel::add_property(OpenMesh::VPropHandleT&, const std::string&) [with T = OpenMesh::Attributes::StatusInfo]'
/opt/OpenMesh/src/OpenMesh/Core/Mesh/ArrayKernel.hh:486:   instantiated from here
/usr/include/c++/4.3/ext/new_allocator.h:114: error: invalid conversion from 'long int' to 'OpenMesh::BaseProperty*'
I remember I was able to compile this example. Why I can not now? Maybe my environment is updated. So, first I updated OpenMesh library from R3 to R5. But this changes nothing. This error is template instantiation error, which I don't like.  I read the source code for three hours with wondering: "Where this 'long int' comes from?" Finally I realized the g++ compile option, "-std=c++0x" is the reason. I totally forget I added this option since hash_map is not standard and will be unordered_map in some point. Today was another unproductive day...
Labels:

Comments

Post a Comment

Popular posts from this blog

Why parallelogram area is |ad-bc|?

Here is my question. The area of parallelogram is the difference of these two rectangles (red rectangle - blue rectangle). This is not intuitive for me. If you also think it is not so intuitive, you might interested in my slides. I try to explain this for hight school students. Slides:  A bit intuitive (for me) explanation of area of parallelogram  (to my site, external link) . 
Post a Comment
Read more

Geometric Multiplicity: eignvectors (2)

If eigenvectors of a matrix A are independent, it is a happy property. Because the matrix A can be diagonalized with a matrix S that column vectors are eigenvectors of A . For example, Why this is a happy property of A? Because I can find A's power easily. A^{10} is not a big deal. Because Λ is a diagonal matrix and power of a diagonal matrix is quite simple. A^{10} = SΛ^{10} S^{-1} Then, why if I want to compute power of A ? That is the same reason to find eigenvectors. Eigenvectors are a basis of a matrix. A matrix can be represented by a single scalar. I repeat this again. This is the happy point, a matrix becomes a scalar. What can be simpler than a scalar value. But, this is only possible when the matrix S's columns are independent. Because S^{-1} must be exist. Now I come back to my first question. Is the λ's multiplicity related with the number of eigenvectors? This time I found this has the name. Geometric multiplicity (GM): the number of in...
Post a Comment
Read more

Gauss's quote for positive, negative, and imaginary number

Recently I watched the following great videos about imaginary numbers by Welch Labs. https://youtu.be/T647CGsuOVU?list=PLiaHhY2iBX9g6KIvZ_703G3KJXapKkNaF I like this article about naming of math by Kalid Azad. https://betterexplained.com/articles/learning-tip-idea-name/ Both articles mentioned about Gauss, who suggested to use other names of positive, negative, and imaginary numbers. Gauss wrote these names are wrong and that is one of the reason people didn't get why negative times negative is positive, or, pure positive imaginary times pure positive imaginary is negative real number. I made a few videos about explaining why -1 * -1 = +1, too. Explanation: why -1 * -1 = +1 by pattern https://youtu.be/uD7JRdAzKP8 Explanation: why -1 * -1 = +1 by climbing a mountain https://youtu.be/uD7JRdAzKP8 But actually Gauss's insight is much powerful. The original is in the Gauß, Werke, Bd. 2, S. 178 . Hätte man +1, -1, √-1) nicht positiv, negative, imaginäre (oder gar um...
Post a Comment
Read more