bfc96ee8ad
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@156 fdac6126-5c0c-442c-9429-916003d36597
39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
/** \page tutorial_07b Deleting geometry elements
|
|
|
|
This small example shows how to remove faces and vertices from a mesh.
|
|
|
|
We basically use the geometry created in \ref tutorial_01.
|
|
|
|
If we want our mesh class to be able to remove vertices, faces or (half-) edges
|
|
we have to extend the default traits for our mesh class.
|
|
Vertices, faces and (half-)edges need the OpenMesh::Attributes::Status attribute
|
|
which is used to hold the flag "deleted" if an element is deleted.
|
|
|
|
The struct which defines the mesh traits then looks like this:
|
|
|
|
\dontinclude delete_geometry.cc
|
|
\skipline struct
|
|
\until };
|
|
|
|
After having created the geometry of the cube one can delete faces and vertices
|
|
by simply calling delete_vertices() (delete_faces() or delete_edges() respectiely).
|
|
|
|
In this example we delete all faces excpet one and the corresponding vertices.
|
|
The code looks like this
|
|
|
|
\dontinclude delete_geometry.cc
|
|
\skipline // Delete face 0
|
|
\until mesh.delete_vertex(vhandle[3], false);
|
|
|
|
Now the deleted faces and vertices are marked as "deleted" internally.
|
|
Call garbage_collection() to definitely remove them from memory.
|
|
|
|
\dontinclude delete_geometry.cc
|
|
\skipline // Delete all
|
|
\until mesh.garbage_collection();
|
|
|
|
The full source code of the example:
|
|
|
|
\include delete_geometry.cc
|
|
|
|
**/ |