SkeletonPlugin: Error in CGAL

[Star war]

Dear sofa,
I succeed to build the SkeletonPlugin and also I run successfully on the origin scene named as “MeshSkeletonization.scn”. I can see the skeleton of a rapter like the image represented in the Github
However, In the scene’s file, if I only activate the “Vessels”, the program is aborted with the error of the following on CGAL.
Changed scene:

	<Node name="Vessels" activated="1">
		<MeshObjLoader name='myLoader' filename='data/mesh/vessels.obj'/>  
		<OglModel name="visualModel" src='@myLoader' color="1 0.6 0.6 1"/>
		<MeshSkeletonization template="Vec3d" name="skel" inputVertices="@myLoader.position" inputTriangles="@myLoader.triangles" />
	</Node>
	<Node name="elephant" activated="0">
		<MeshObjLoader name='myLoader' filename='data/mesh/elephant.obj'/>  
		<OglModel name="visualModel" src='@myLoader' color="1 0.6 0.6 1"/>
        <!-- 
        <MeshSkeletonization template="Vec3d" name="skel" />
        -->
        <MeshSkeletonization template="Vec3d" name="skel" filename="data/mesh/elephant.off" />
	</Node>
	<Node name="dragon" activated="0">
		<MeshObjLoader name='myLoader' filename='data/mesh/raptor8k1.obj'/>  
		<OglModel name="visualModel" src='@myLoader' color="1 0.6 0.6 1"/>
		<MeshSkeletonization template="Vec3d" name="skel" inputVertices="@myLoader.position" inputTriangles="@myLoader.triangles" />
	</Node>

Error from the program runsofa:

 
[INFO]    [PluginManager] Loaded plugin: /Users/steven/Code/sofa/sofa/v19.12/build2/plugins/SkeletonPlugin/lib/libSkeletonPlugin.dylib
[INFO]    [SceneCheckerVisitor] Validating node "root" with checks: [SceneCheckAPIChange, SceneCheckDuplicatedName, SceneCheckMissingRequiredPlugin, SceneCheckUsingAlias]
[INFO]    [SceneCheckAPIChange] No 'APIVersion' component in scene. Using the default APIVersion level: 19.06
[INFO]    [SceneCheckerVisitor] Finished validating node "root".

Loading Polyhedron from MeshObjLoader.
Number of vertices of the input mesh: 230
<strong>CGAL error: assertion violation!</strong>
Expression : CGAL::is_closed(tmesh)
File       : /usr/local/Cellar/cgal/5.0.2/include/CGAL/Side_of_triangle_mesh.h
Line       : 146
Explanation:
Refer to the bug-reporting instructions at https://www.cgal.org/bug_report.html
libc++abi.dylib: terminating with uncaught exception of type CGAL::Assertion_exception: CGAL ERROR: assertion violation!
Expr: CGAL::is_closed(tmesh)
File: /usr/local/Cellar/cgal/5.0.2/include/CGAL/Side_of_triangle_mesh.h
Line: 146

Thank you.
Enxing

[Hugo]

Hi @enxing

My first reply would be to ask: why de-activating nodes?
I would say that due to de-activation of the nodes, the initialization of the MeshSkeletonization goes wrong. What happens if you just remove those two nodes?

Best,

Hugo

[Author]

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