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Volume Mesh Operations

Object Operations 📥 Download Script

Volume Mesh Operations Tutorial.

This tutorial demonstrates operations on tetrahedral volume meshes including import/export, transformations, and conversion to surfaces.

Prerequisites
  • Volvicon application must be running
  • Volume meshes are typically created by converting surfaces using

Listing Volume Meshes​

all_volume_meshes = app.get_all_volume_mesh_names()
all_volumes = app.get_all_volume_names()
print(f"Available volume meshes: {all_volume_meshes}")
print(f"Available volumes: {all_volumes}")

Importing and Exporting Volume Meshes​

# Supported formats: vtu, vtk

# Import a single volume mesh file
# mesh_name = VolumeMeshOperations.import_volume_mesh_from_disk(r'C:\data\mesh.vtu')

# Import multiple volume mesh files
# mesh_names = VolumeMeshOperations.import_volume_meshes_from_disk([
#     r'C:\data\mesh1.vtu',
#     r'C:\data\mesh2.vtk'
# ])

# Export a single volume mesh to file
# VolumeMeshOperations.export_volume_mesh_to_disk('volume_mesh (1)', r'C:\output\mesh.vtu', False)  # isASCII=False (bool)

# Export multiple volume meshes to a directory
# VolumeMeshOperations.export_volume_meshes_to_disk(['volume_mesh (1)', 'volume_mesh (2)'], r'C:\output', 'vtu', False)  # isASCII=False

Geometric Transformations​

# if all_volume_meshes:
#     # Rotate around axis
#     VolumeMeshOperations.rotate(
#         [all_volume_meshes[0]],  # volumeMeshNames (list)
#         45.0,                    # angleDegrees (float)
#         [0.0, 0.0, 1.0],         # axis [x, y, z]
#         [0.0, 0.0, 0.0],         # center [x, y, z] (ignored if aroundObjectCentroid=True)
#         True                     # aroundObjectCentroid (bool)
#     )
#
#     # Translate
#     VolumeMeshOperations.translate(
#         [all_volume_meshes[0]],  # volumeMeshNames (list)
#         [10.0, 5.0, 0.0]         # translation [x, y, z] in mm
#     )
#
#     # Scale
#     VolumeMeshOperations.scale(
#         [all_volume_meshes[0]],  # volumeMeshNames (list)
#         [1.5, 1.5, 1.5]          # scaleFactors [x, y, z]
#     )
#
#     # Mirror across axes
#     VolumeMeshOperations.mirror(
#         [all_volume_meshes[0]],  # volumeMeshNames (list)
#         True,                    # mirrorX (bool)
#         False,                   # mirrorY (bool)
#         False                    # mirrorZ (bool)
#     )
#
#     # Apply 4x4 transformation matrix
#     # matrix = [1,0,0,0, 0,1,0,0, 0,0,1,0, 10,20,30,1]  # Translation example
#     # VolumeMeshOperations.transform([all_volume_meshes[0]], matrix)
#
#     # Move to center of active volume
#     VolumeMeshOperations.move_to_active_volume_center([all_volume_meshes[0]])

Convert Volume Mesh to Surfaces​

# if all_volume_meshes:
#     surface_names = VolumeMeshOperations.convert_to_surfaces([all_volume_meshes[0]])
#     print(f"Created surfaces: {surface_names}")

Render Properties​

# VolumeMeshRenderPropertiesOperations = VolumeMeshOperations.get_render_properties_operations()
# if all_volume_meshes:
#     # Set representation mode
#     VolumeMeshRenderPropertiesOperations.set_representation([all_volume_meshes[0]], api.VolumeMeshRepresentation.Solid)  # Points, Wireframe, Solid, SolidEdges
#
#     # Set color (RGB values 0.0-1.0)
#     VolumeMeshRenderPropertiesOperations.set_color([all_volume_meshes[0]], [0.2, 0.6, 0.8])  # Blue
#
#     # Set random color
#     VolumeMeshRenderPropertiesOperations.set_random_color([all_volume_meshes[0]])
#
#     # Set opacity (0.0-1.0)
#     VolumeMeshRenderPropertiesOperations.set_opacity([all_volume_meshes[0]], 0.8)

print("Volume mesh operations tutorial completed successfully.")