Remove Defect Mesh after performing DXA

OVITO
1

Hello,

I am looking to render some animations of my simulation using the Python implementation of Ovito. In my simulation I have two fixed surfaces on the top and the bottom (as shown in the attached image). DXA picks these up as defects and therefore shows a defect mesh over the top. and bottom of the box, obstructing my view of my system. I am wondering how I might remove the defect mesh when I go to render my simulation results.

image
image800×600 11.8 KB

I am aware that this was asked previously in this thread, however I believe the solution in that case is to the change the settings of the DXA modifier. My question is can I remove the defect mesh after I have computed the pipeline? Can I remove visual elements from my pipeline after it has been computed? Please see my code for an example of what I’m currently trying to do.

from ovito.io import import_file
from ovito.vis import Viewport

# Import the precipitate IDs
prec_pipeline = import_file('000_data/03_pin_dislo/output/precipitate_ID.txt')

# Import the DXA results (Out of a CA file)
dxa_pipeline = import_file('000_data/03_pin_dislo/dxa/dxa_*')

# Load the pipelines to a scene
prec_pipeline.add_to_scene()
dxa_pipeline.add_to_scene()

# Create viewport settings
vp = Viewport()
vp.type = Viewport.Type.Perspective
vp.camera_dir = (0, 0, 0)
vp.zoom_all()

vp.render_image(size=(800,600), filename="figure.png", background=(1,1,1), frame=1000)

The reason why I ask this is because I perform DXA on my dump files on HPC system. I then download the processed DXA files (in CA format) for visualisation and subsequent data analysis.

Any help would be much appreciated!

Thanks,

E

2

You can view the visual elements currently in the pipeline using: pipeline.vis_elements. You can subsequently disable SurfaceMeshVis elements using this code:

from ovito.vis import SurfaceMeshVis

pipeline = import_file('test.ca')

for vis_element in pipeline.vis_elements:
    if isinstance(vis_element, SurfaceMeshVis):
        vis_element.enabled = False
3

Just for your information, even if it doesn’t directly answer your question about hiding the defect mesh later on: There is an undocumented option export_mesh=False, which allows you to export the DXA results to CA files so that only the dislocation lines are saved but not the defect mesh:

export_file(pipeline, "dislocs.*.ca", "ca", 
    multiple_frames=True, 
    export_mesh=False)

This can be useful if you know in advance that the defect mesh is irrelevant and you want to keep the CA files as compact as possible.

4

Hi both,

Thank you so much. This is very useful information.