Avoid merging duplicated points

ParaView Support
1

Hello,
I am trying to upload a STL file that has plenty of points and most of them are duplicated. I noticed that it takes too long to upload it, but if I try to visualize it in Microsoft 3D Viewer, it takes only a few seconds. Maybe it takes that long because of the merging. Is there a way to upload a STL file without merging the duplicated points?

Thank you

2

Is setting
DuplicatePointsForFaceTexture
to False making a difference?

3

@sebasgut1 please share your dataset.

4

STLReader does not have that setting

5

I was not able to upload through this uploader, so here a link to the stl file

6

The reader itself has the flag.

You just need an XML plugin to expose it I guess.

7

Is there a way to do it in pvpython with paraview?
I was trying to do it with STLReader from Paraview, but does not work. With vtkSTLReader works but then the reader cannot be shown in paraview.simple.Show()

8

Indeed, that is for PLY, Sorry for the confusion.

9

Yes, create a plugin (1 xml file) like here where you expose that extra property and then load that file as plugin.

1 Like
10

stlreader.xml (948 Bytes)
Like this?
But is this only for GUI? Because I have a script. Since importing vtk in pvtyhon and using vtkSTLReader.MergingOff() works, is there a way to transform the polydata in way that paraview.simple.Show() understands? Because the other option is to change the whole script that has paraview.simple to vtk, but I prefer not to.

11

More like

<ParaViewPlugin>
  <ServerManagerConfiguration>
    <ProxyGroup name="sources">
      <SourceProxy
        name="vtkSTLReader"
        class="vtkSTLReader"
        label="MySTLReader"
      >
        <IntVectorProperty 
          name="Merging"
          command="SetMerging"
          number_of_elements="1"
          default_values="0"
        >
          <BooleanDomain name="bool"/>
        </IntVectorProperty>

        <StringVectorProperty
          name="FileName"
          animateable="0"
          command="SetFileName"
          number_of_elements="1"
          panel_visibility="never"
        >
         <FileListDomain name="files"/>
        </StringVectorProperty>

        <Hints>
          <ReaderFactory extensions="stl" file_description="My stl Files" />
        </Hints>
      </SourceProxy>
    </ProxyGroup>
  </ServerManagerConfiguration>
</ParaViewPlugin>

And then do the following in a script

import time
from pathlib import Path
from paraview import simple

t0 = time.time()

plugin_path = str(Path(__file__).with_name("plugin.xml").absolute())
file_path = str(Path(__file__).with_name("heatsink.stl").absolute())

simple.LoadPlugin(plugin_path, ns=globals())

reader = MySTLReader(FileName=file_path)
simple.Show(reader)
simple.Render()

t1 = time.time()

print(f"Load + render time {t1 - t0}s")
1 Like
12

It is faster now, thank you!!!

1 Like