How can I export a GLB / GLTF file format with PyDPF?

Ayush Kumar

How can I export a GLB / GLTF file format with PyDPF?

Ayush Kumar

You will need to install any Python lib. to convert GLTF to GLB format because PyVista only exports GLTF. An example would be pip installing pygltflib

import os
from ansys.dpf import core as dpf

from ansys.dpf.core.plotter import DpfPlotter
from pygltflib.utils import gltf2glb

out_path = r"\FOLDER\PATH\TO\RESULT\FILE"
rst_path = os.path.join(out_path, "file.rst")

model = dpf.Model(rst_path)
mesh = model.metadata.meshed_region

print(mesh)

displacement = model.results.displacement()
disp_f = displacement.outputs.fields_container()[0]

plotter = DpfPlotter()
plotter.add_field(disp_f)

gltf_path = os.path.join(out_path, r"test_export.gltf")
gltf = plotter._internal_plotter._plotter.export_gltf(gltf_path)

glb_path = os.path.join(out_path, r"test_export.glb")
"""Convert GLTF to GLB File"""
gltf2glb(gltf_path, glb_path)

"""
Export just legend as an image with white Background
Can be used as a background in a 3D viewer where the GLB is imported.
"""
plotter = DpfPlotter()
plotter.add_field(disp_f, opacity=0.0)
path_to_legend = os.path.join(out_path, "legend.png")
plotter.show_figure(screenshot=path_to_legend)

kanchan_cadfem

There is a custom operator created as an example for this

https://dpf.docs.pyansys.com/version/stable/examples/08-python-operators/02-python_operators_with_dependencies.html

once loaded the usage is straightforward

new_operator = dpf.Operator("gltf_export")
import os

model = dpf.Model(dpf.upload_file_in_tmp_folder(examples.find_static_rst()))

mesh = model.metadata.meshed_region
skin_mesh = dpf.operators.mesh.tri_mesh_skin(mesh=mesh)

displacement = model.results.displacement()
displacement.inputs.mesh_scoping(skin_mesh)
displacement.inputs.mesh(skin_mesh)
new_operator.inputs.path(os.path.join(tmp, "out"))
new_operator.inputs.mesh(skin_mesh)
new_operator.inputs.field(displacement.outputs.fields_container()[0])
new_operator.run()

print("operator ran successfully")

dpf.download_file(os.path.join(tmp, "out.glb"), os.path.join(os.getcwd(), "out.glb"))

Ayush Kumar

Just wanted to point out that the DPF's gltf_export also uses pygltflib behind the scenes.

Ayush Kumar

Note: If the results field contains COMBIN14 and PRETS179, the exported GLB doesn't show any contour.