View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0003617||FEM||Bug||public||2018-09-25 21:30||2019-01-14 18:37|
|Fixed in Version||0.18|
|Summary||0003617: FEM, post processing, vtk mesh, it is not possible to create a vtk mesh with gaps|
|Steps To Reproduce||- open FEM 2D example|
- select solver
- change "Beam Shell Result Output 3D" to true
- rerun analysis
- check Abs displacement colors in standard result object, they look fine.
- select the 3D solid result object
- create vtk pipe
- some error in report view is printed
- double click on the pipeline
- set mode "Surface wit edges"
- set field to "Displacement"
- set vector to "Magnitude"
- this does not look to be the right coloring ...
to reproduce by Python (tested with FreeCAD 0.18.15607) use:
|Tags||No tags attached.|
||the code ... https://github.com/FreeCAD/FreeCAD/blob/a0ff629747d5d73567075821852a8cdaadcf51c5/src/Mod/Fem/App/FemVTKTools.cpp#L445-L462|
If the FreeCAD file is saved and reopened the problem could be even worse, because of 0002873. But both are totally independent!
Problem are the not continuous node ids in the freecad mesh. In general the FEM result property stores all results for the individual mesh nodes by index, assuming index==id. Hence Node 1 result is in result vector at position 1. However, when the node ids are not continuous in the freecad mesh, e.g. there are 3 nodes but ids are [0 1 5], that mapping does not work for VTK anymore. The reason is that in VTK node ids must be continuous, the example mesh would result in the following VTK nodes [0 1 2 3 4 5] with ids 2,3,4 existing but not used by any elements. Now with index==id the results would be assigned to ids [0 1 2] instead of [0 1 5], which results in the display error.
The solution is to remove the assumption index==id and use the correct note id for each result value:
@berndhahnebach Could you do some regression testing with this fix?
|2018-09-25 21:30||berndhahnebach||New Issue|
|2018-09-25 21:30||berndhahnebach||Status||new => confirmed|
|2018-09-26 21:25||berndhahnebach||Note Added: 0011860|
|2018-09-26 21:28||berndhahnebach||Note Added: 0011861|
|2018-09-26 21:28||berndhahnebach||Note Edited: 0011861||View Revisions|
|2018-09-26 21:29||berndhahnebach||Note Edited: 0011861||View Revisions|
|2019-01-03 09:21||ickby||Note Added: 0012363|
|2019-01-11 06:21||berndhahnebach||Steps to Reproduce Updated||View Revisions|
|2019-01-11 06:58||berndhahnebach||Steps to Reproduce Updated||View Revisions|
|2019-01-11 06:59||berndhahnebach||Steps to Reproduce Updated||View Revisions|
|2019-01-14 15:43||wmayer||Relationship added||related to 0002873|
|2019-01-14 18:37||wmayer||Assigned To||=> ickby|
|2019-01-14 18:37||wmayer||Status||confirmed => closed|
|2019-01-14 18:37||wmayer||Resolution||open => fixed|
|2019-01-14 18:37||wmayer||Fixed in Version||=> 0.18|
|2019-01-14 18:37||wmayer||Note Added: 0012431|