Can the three.js library be used to display Finite Element Analysis (FEA) outcomes

In the process of developing a real-time wind turbine simulation Finite Element Analysis software using three.js to visualize the calculated 3D FEA results, I am faced with a challenge. The goal is to have the displayed 3D wind turbine rotate like its physical counterpart does. Generating multiple VTK format result files per second, equating to numerous frames per second.

  • My first query is whether there exists a method to showcase vtk format files or general types of FEA files (such as those outputted by FEA softwares like ANSYS or COMSOL) utilizing three.js? I am open to suggestions for file format transformations.
  • Secondly, am I limited to loading 3D FEA files frame by frame through the load function? Considering that individual FEA result files can be substantial in size, and the frame rate could be adversely affected by internet quality. Perhaps pre-generating animations of several frames could lead to improved performance?
javascriptthree.jsfinite-element-analysis

Answer №1

three.js has a feature where it can load VTK files, but it doesn't natively support animation. One possible workaround could be having a separate VTK file for each frame.

However, it's generally recommended to use glTF/GLB format for models in three.js due to their efficiency in parsing and compatibility with web environments. They also offer various compression options. Converting from VTK to glTF might require some additional tools or plugins.

If you manage to get a glTF file with individual meshes for each frame, you can then utilize gltf transform for different compression techniques:

# clean up
gltf-transform dedup tmp_animated.glb

# add animation
gltf-transform sequence input.glb tmp_animated.glb \
    --pattern "mesh_name*" \
    --fps 24

# draco compression (option a)
gltf-transform draco tmp_animated.glb output_draco.glb

# meshopt compression (option b) (apply gzip after this)
gltf-transform meshopt tmp_animated.glb output_draco.glb

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