.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "examples/04_metadata/inspect_step_assembly.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_examples_04_metadata_inspect_step_assembly.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_examples_04_metadata_inspect_step_assembly.py:


Inspect a STEP assembly
=======================

A STEP file with multiple parts arrives as a
:class:`pyvista.MultiBlock`. Per-part labels and colors are attached
as ``cad.label`` / ``cad.color`` field data. Use ``.cad.find`` and
``.cad.walk`` to navigate the tree.

This example loads a real multi-part STEP assembly, the NIST AM
Bench 2022 build-plate layout (public domain,
https://doi.org/10.18434/mds2-2607): a tapped substrate plate, four
bridge specimens, and two recoater guides. It walks the metadata
you can pull off any STEP assembly that lands on your desk.

.. GENERATED FROM PYTHON SOURCE LINES 18-25

.. code-block:: Python


    import pandas as pd
    import pyvista as pv

    import pyvista_cad
    from pyvista_cad.examples import downloads








.. GENERATED FROM PYTHON SOURCE LINES 26-27

Read the real assembly.

.. GENERATED FROM PYTHON SOURCE LINES 27-31

.. code-block:: Python


    mb = pyvista_cad.read_step(downloads.step_assembly_path())
    mb






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    .pv-badge-active {
      color: var(--pv-badge-active);
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    .pv-badge-normals {
      color: var(--pv-badge-normals);
      border: 1px solid var(--pv-badge-normals);
    }

    .pv-badge-vectors {
      color: var(--pv-badge-vectors);
      border: 1px solid var(--pv-badge-vectors);
    }

    .pv-badge-tcoords {
      color: var(--pv-badge-tcoords);
      border: 1px solid var(--pv-badge-tcoords);
    }

    /* Logo and Icons */
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    .pv-child-detail:not(:empty):before {
      content: "\00b7";
      padding: 0 6px;
    }
    </style><pre class='pv-text-repr-fallback'>MultiBlock (0x7f6fa89aa920)
      N Blocks:   7
      X Bounds:   4.096e+01, 1.426e+02
      Y Bounds:   -1.994e+01, 8.166e+01
      Z Bounds:   -1.243e-15, 2.203e+01</pre><div class='pv-wrap' style='display:none'><div class='pv-header'><span class='pv-logo'><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
      <defs>
        <linearGradient id="pv-mb-top1" x1="0" y1="0" x2="1" y2="1">
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          <stop offset="100%" stop-color="#376fa0"/>
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        <linearGradient id="pv-mb-top2" x1="0" y1="0" x2="1" y2="1">
          <stop offset="0%" stop-color="#376fa0"/>
          <stop offset="100%" stop-color="#ffd040"/>
        </linearGradient>
      </defs>
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        <line x1="4" y1="13" x2="13" y2="17"/>
        <line x1="22" y1="13" x2="13" y2="17"/>
      </g>
      <polygon points="17,7 26,11 17,15 8,11" fill="url(#pv-mb-top2)" opacity="0.9"/>
      <polygon points="8,11 17,15 17,22 8,18" fill="#1a4a70" opacity="0.85"/>
      <polygon points="26,11 17,15 17,22 26,18" fill="#376fa0" opacity="0.85"/>
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        <polygon points="17,7 26,11 17,15 8,11"/>
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        <line x1="8" y1="18" x2="17" y2="22"/>
        <line x1="26" y1="18" x2="17" y2="22"/>
      </g>
      <polygon points="19,13 28,17 19,21 10,17" fill="url(#pv-mb-top1)" opacity="0.95"/>
      <polygon points="10,17 19,21 19,28 10,24" fill="#1a4a70" opacity="0.9"/>
      <polygon points="28,17 19,21 19,28 28,24" fill="#376fa0" opacity="0.9"/>
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        <line x1="28" y1="17" x2="28" y2="24"/>
        <line x1="10" y1="24" x2="19" y2="28"/>
        <line x1="28" y1="24" x2="19" y2="28"/>
      </g>
    </svg>
    </span><div class='pv-header-text'><div class='pv-obj-type'>MultiBlock <span class='pv-header-badge'>7 blocks</span> <span class='pv-header-badge'>284 KiB</span></div></div><span class='pv-brand-logo'><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 90 24">
      <text x="0" y="18" font-family="system-ui,-apple-system,sans-serif" font-size="18" font-weight="700" font-style="italic" letter-spacing="-0.5">
        <tspan fill="#3776AB" opacity="0.7">P</tspan><tspan fill="#FFD43B" opacity="0.7">y</tspan><tspan fill="#008c9e">Vista</tspan>
      </text>
    </svg>
    </span></div><div class='pv-metadata'><div class='pv-meta-row pv-copyable'><span class='pv-meta-row-label'>Bounds</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='(40.96301608608543, 142.56301608608544, -19.94289174608957, 81.65710825391042, -1.242685846498791e-15, 22.025000000000006)' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button><span class='pv-meta-entry'><span class='pv-meta-label'>X</span> [4.096e+01, 1.426e+02]</span><span class='pv-meta-entry'><span class='pv-meta-label'>Y</span> [-1.994e+01, 8.166e+01]</span><span class='pv-meta-entry'><span class='pv-meta-label'>Z</span> [-1.243e-15, 2.203e+01]</span></div></div><ul class='pv-sections'><li class='pv-section-item'><input id='section-993baefe-1d23-44df-9d47-74c7bb2f00d2' class='pv-section-summary-in' type='checkbox' checked /><label for='section-993baefe-1d23-44df-9d47-74c7bb2f00d2' class='pv-section-summary' title='Expand/collapse section'>Blocks: <span>(7)</span></label><div class='pv-section-inline-details'></div><div class='pv-section-details'><ul class='pv-children-list'><li><span class='pv-child-name'>AMMT_4x4x0_375_Substrate_Tapped</span><span class='pv-child-type'>PolyData</span><span class='pv-child-detail'>456 pts · 444 cells · 38 KiB</span></li><li><span class='pv-child-name'>AMB2022-01-AMMT-PartCAD</span><span class='pv-child-type'>PolyData</span><span class='pv-child-detail'>690 pts · 436 cells · 44 KiB</span></li><li><span class='pv-child-name'>AMB2022-01-AMMT-PartCAD</span><span class='pv-child-type'>PolyData</span><span class='pv-child-detail'>690 pts · 436 cells · 44 KiB</span></li><li><span class='pv-child-name'>AMB2022-01-AMMT-PartCAD</span><span class='pv-child-type'>PolyData</span><span class='pv-child-detail'>690 pts · 436 cells · 44 KiB</span></li><li><span class='pv-child-name'>AMB2022-01-AMMT-PartCAD</span><span class='pv-child-type'>PolyData</span><span class='pv-child-detail'>690 pts · 436 cells · 44 KiB</span></li><li><span class='pv-child-name'>AMB2022-01-AMMT-RecoaterGuideCAD</span><span class='pv-child-type'>PolyData</span><span class='pv-child-detail'>310 pts · 416 cells · 35 KiB</span></li><li><span class='pv-child-name'>AMB2022-01-AMMT-RecoaterGuideCAD</span><span class='pv-child-type'>PolyData</span><span class='pv-child-detail'>310 pts · 416 cells · 35 KiB</span></li></ul></div></li></ul></div></div>
    </div>
    <br />
    <br />

.. GENERATED FROM PYTHON SOURCE LINES 32-34

Walk the tree. Each block carries its OCCT label and an optional
color tuple.

.. GENERATED FROM PYTHON SOURCE LINES 34-50

.. code-block:: Python


    rows = []
    for path, block in mb.cad.walk():
        color = block.field_data.get('cad.color', None)
        rows.append(
            {
                'path': str(path),
                'label': block.field_data.get('cad.label', [b''])[0],
                'color': [round(float(c), 3) for c in color]
                if color is not None and len(color)
                else None,
                'cells': block.n_cells,
            }
        )
    pd.DataFrame(rows)






.. raw:: html

    <div class="output_subarea output_html rendered_html output_result">
    <div>
    <style scoped>
        .dataframe tbody tr th:only-of-type {
            vertical-align: middle;
        }

        .dataframe tbody tr th {
            vertical-align: top;
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        .dataframe thead th {
            text-align: right;
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    <table border="1" class="dataframe">
      <thead>
        <tr style="text-align: right;">
          <th></th>
          <th>path</th>
          <th>label</th>
          <th>color</th>
          <th>cells</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <th>0</th>
          <td>AMMT_4x4x0_375_Substrate_Tapped</td>
          <td>AMMT_4x4x0_375_Substrate_Tapped</td>
          <td>[0.591, 0.638, 0.855, 1.0]</td>
          <td>444</td>
        </tr>
        <tr>
          <th>1</th>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>[0.527, 0.527, 0.527, 1.0]</td>
          <td>436</td>
        </tr>
        <tr>
          <th>2</th>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>[0.527, 0.527, 0.527, 1.0]</td>
          <td>436</td>
        </tr>
        <tr>
          <th>3</th>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>[0.527, 0.527, 0.527, 1.0]</td>
          <td>436</td>
        </tr>
        <tr>
          <th>4</th>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>AMB2022-01-AMMT-PartCAD</td>
          <td>[0.527, 0.527, 0.527, 1.0]</td>
          <td>436</td>
        </tr>
        <tr>
          <th>5</th>
          <td>AMB2022-01-AMMT-RecoaterGuideCAD</td>
          <td>AMB2022-01-AMMT-RecoaterGuideCAD</td>
          <td>[0.591, 0.638, 0.855, 1.0]</td>
          <td>416</td>
        </tr>
        <tr>
          <th>6</th>
          <td>AMB2022-01-AMMT-RecoaterGuideCAD</td>
          <td>AMB2022-01-AMMT-RecoaterGuideCAD</td>
          <td>[0.591, 0.638, 0.855, 1.0]</td>
          <td>416</td>
        </tr>
      </tbody>
    </table>
    </div>
    </div>
    <br />
    <br />

.. GENERATED FROM PYTHON SOURCE LINES 51-52

Source format and units round-trip on the container.

.. GENERATED FROM PYTHON SOURCE LINES 52-60

.. code-block:: Python


    pd.DataFrame(
        {
            'source_format': [mb.field_data.get('cad.source_format', [b''])[0]],
            'units': [mb.field_data.get('cad.units', [b''])[0]],
        }
    )






.. raw:: html

    <div class="output_subarea output_html rendered_html output_result">
    <div>
    <style scoped>
        .dataframe tbody tr th:only-of-type {
            vertical-align: middle;
        }

        .dataframe tbody tr th {
            vertical-align: top;
        }

        .dataframe thead th {
            text-align: right;
        }
    </style>
    <table border="1" class="dataframe">
      <thead>
        <tr style="text-align: right;">
          <th></th>
          <th>source_format</th>
          <th>units</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <th>0</th>
          <td>step</td>
          <td>mm</td>
        </tr>
      </tbody>
    </table>
    </div>
    </div>
    <br />
    <br />

.. GENERATED FROM PYTHON SOURCE LINES 61-62

Flatten: collapse arbitrary nesting to a single level.

.. GENERATED FROM PYTHON SOURCE LINES 62-65

.. code-block:: Python


    list(mb.cad.flatten().keys())





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    ['AMMT_4x4x0_375_Substrate_Tapped', 'AMB2022-01-AMMT-PartCAD', 'AMB2022-01-AMMT-PartCAD', 'AMB2022-01-AMMT-PartCAD', 'AMB2022-01-AMMT-PartCAD', 'AMB2022-01-AMMT-RecoaterGuideCAD', 'AMB2022-01-AMMT-RecoaterGuideCAD']



.. GENERATED FROM PYTHON SOURCE LINES 66-67

Render colored by Z.

.. GENERATED FROM PYTHON SOURCE LINES 67-73

.. code-block:: Python


    for _, part in mb.cad.walk():
        part['Z'] = part.points[:, 2]
    pl = pv.Plotter()
    pl.cad.add(mb, scalars='Z', cmap='viridis')
    pl.show()







.. tab-set::



   .. tab-item:: Static Scene



            
     .. image-sg:: /examples/04_metadata/images/sphx_glr_inspect_step_assembly_001.png
        :alt: inspect step assembly
        :srcset: /examples/04_metadata/images/sphx_glr_inspect_step_assembly_001.png
        :class: sphx-glr-single-img
     


   .. tab-item:: Interactive Scene



       .. offlineviewer:: /home/runner/work/pyvista-cad/pyvista-cad/doc/examples/04_metadata/images/sphx_glr_inspect_step_assembly_001.vtksz







.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.670 seconds)


.. _sphx_glr_download_examples_04_metadata_inspect_step_assembly.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: inspect_step_assembly.ipynb <inspect_step_assembly.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: inspect_step_assembly.py <inspect_step_assembly.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: inspect_step_assembly.zip <inspect_step_assembly.zip>`