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Updated tutorial on deleting geometry.

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git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@264 fdac6126-5c0c-442c-9429-916003d36597
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Mike Kremer
2010-01-22 09:40:45 +00:00
parent edbb2a44ab
commit 6f57741358
1 changed files with 13 additions and 1 deletions
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14
Doc/tutorial_07b.docu
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@@ -4,7 +4,7 @@ This small example shows how to remove faces and vertices from a mesh.
We basically use the geometry created in \ref tutorial_01. 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 If we want our mesh class to be able to remove vertices, faces or edges
we have to extend the default traits for our mesh class. we have to extend the default traits for our mesh class.
Vertices, faces and (half-)edges need the OpenMesh::Attributes::Status attribute Vertices, faces and (half-)edges need the OpenMesh::Attributes::Status attribute
which is used to hold the flag "deleted" if an element is deleted. which is used to hold the flag "deleted" if an element is deleted.
@@ -18,6 +18,18 @@ The struct which defines the mesh traits then looks like this:
After having created the geometry of the cube one can delete faces and vertices After having created the geometry of the cube one can delete faces and vertices
by simply calling delete_vertices() (delete_faces() or delete_edges() respectively). by simply calling delete_vertices() (delete_faces() or delete_edges() respectively).
Note that there is actually no way to delete halfedges directly since they are automatically
affected when the parent edge is marked as deleted!
The status whether an element is marked as deleted can be requested by
\code
mesh.status(handle).deleted(); // true if element handle is marked as deleted
// false otherwise
\endcode
where handle is either a vertex-, edge- or face-handle.
In this example we delete all faces except one and the corresponding vertices. In this example we delete all faces except one and the corresponding vertices.
The code looks like this The code looks like this