.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "examples/01_readers/read_iges.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_examples_01_readers_read_iges.py>`
        to download the full example code.

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

.. _sphx_glr_examples_01_readers_read_iges.py:


Read an IGES file
=================

IGES (``.iges`` / ``.igs``) is one of the older neutral CAD interchange
formats, still common for legacy mechanical hand-offs and
turbomachinery. ``pyvista_cad.read_iges`` wraps `pyiges
<https://github.com/pyvista/pyiges>`_ and tessellates analytic
surfaces with geomdl.

This example uses a real centrifugal impeller exported from SolidWorks
to IGES (MIT, pyiges) and pushes beyond a load+plot demo by computing
surface curvature, the kind of analysis turbomachinery engineers
routinely run on imported IGES geometry.

.. GENERATED FROM PYTHON SOURCE LINES 18-25

.. code-block:: Python


    import numpy as np
    import pyvista as pv

    import pyvista_cad
    from pyvista_cad.examples import downloads








.. GENERATED FROM PYTHON SOURCE LINES 26-28

Load the real impeller. ``surfaces=True`` tessellates every analytic
B-spline surface; ``lines=False`` drops the construction wires.

.. GENERATED FROM PYTHON SOURCE LINES 28-37

.. code-block:: Python


    iges = pyvista_cad.read_iges(
        downloads.iges_impeller_path(),
        bsplines=True,
        surfaces=True,
        lines=False,
    )
    iges





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

 .. code-block:: none


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.. raw:: html

    <div class="output_subarea output_html rendered_html output_result">
    <div><style>/* PyVista HTML repr stylesheet.
     * Uses pv- prefix to avoid conflicts with other libraries.
     */

    :root {
      --pv-font-color0: var(--jp-content-font-color0, rgba(0, 0, 0, 1));
      --pv-font-color2: var(--jp-content-font-color2, rgba(0, 0, 0, 0.54));
      --pv-font-color3: var(--jp-content-font-color3, rgba(0, 0, 0, 0.38));
      --pv-border-color: var(--jp-border-color2, #e0e0e0);
      --pv-disabled-color: var(--jp-layout-color3, #bdbdbd);
      --pv-background-color-row-even: var(--jp-layout-color1, #f5f5f5);
      --pv-background-color-row-odd: var(--jp-layout-color2, #eeeeee);
      --pv-badge-active: #1b5e20;
      --pv-badge-normals: #0d47a1;
      --pv-badge-vectors: #00695c;
      --pv-badge-tcoords: #4527a0;
    }

    body[data-jp-theme-light="false"] {
      --pv-font-color0: var(--jp-content-font-color0, rgba(255, 255, 255, 1));
      --pv-font-color2: var(--jp-content-font-color2, rgba(255, 255, 255, 0.54));
      --pv-font-color3: var(--jp-content-font-color3, rgba(255, 255, 255, 0.38));
      --pv-border-color: var(--jp-border-color2, #424242);
      --pv-disabled-color: var(--jp-layout-color3, #616161);
      --pv-background-color-row-even: var(--jp-layout-color1, #1a1a1a);
      --pv-background-color-row-odd: var(--jp-layout-color2, #252525);
      --pv-badge-active: #66bb6a;
      --pv-badge-normals: #64b5f6;
      --pv-badge-vectors: #4db6ac;
      --pv-badge-tcoords: #b39ddb;
    }

    html[theme="dark"],
    html[data-theme="dark"],
    body[data-theme="dark"],
    body.vscode-dark {
      --pv-font-color0: rgba(255, 255, 255, 1);
      --pv-font-color2: rgba(255, 255, 255, 0.54);
      --pv-font-color3: rgba(255, 255, 255, 0.38);
      --pv-border-color: #424242;
      --pv-disabled-color: #616161;
      --pv-background-color-row-even: #1a1a1a;
      --pv-background-color-row-odd: #252525;
      --pv-badge-active: #66bb6a;
      --pv-badge-normals: #64b5f6;
      --pv-badge-vectors: #4db6ac;
      --pv-badge-tcoords: #b39ddb;
    }

    /* OS-level dark mode fallback: applies when no explicit data-theme is set */
    @media (prefers-color-scheme: dark) {
      html:not([data-theme="light"]) {
        --pv-font-color0: rgba(255, 255, 255, 1);
        --pv-font-color2: rgba(255, 255, 255, 0.54);
        --pv-font-color3: rgba(255, 255, 255, 0.38);
        --pv-border-color: #424242;
        --pv-disabled-color: #616161;
        --pv-background-color-row-even: #1a1a1a;
        --pv-background-color-row-odd: #252525;
        --pv-badge-active: #66bb6a;
        --pv-badge-normals: #64b5f6;
        --pv-badge-vectors: #4db6ac;
        --pv-badge-tcoords: #b39ddb;
      }
    }

    .pv-wrap {
      display: block !important;
      min-width: 300px;
      max-width: 700px;
      line-height: 1.6;
      padding-bottom: 4px;
      font-family: var(--jp-ui-font-family, sans-serif);
      font-size: var(--jp-ui-font-size1, 13px);
      color: var(--pv-font-color0);
    }

    .pv-text-repr-fallback {
      display: none;
    }

    /* Header */
    .pv-header {
      display: flex;
      align-items: center;
      gap: 8px;
      padding-top: 6px;
      padding-bottom: 6px;
      border-bottom: solid 1px var(--pv-border-color);
      margin-bottom: 4px;
    }

    .pv-header-text {
      display: flex;
      flex-direction: column;
      gap: 1px;
      min-width: 0;
      flex: 1;
    }

    .pv-obj-type {
      font-weight: 600;
      color: var(--pv-font-color0);
    }

    .pv-header-badge {
      display: inline-block;
      font-size: 0.75em;
      font-weight: 600;
      padding: 2px 7px;
      border-radius: 3px;
      color: var(--pv-font-color2);
      border: 1px solid var(--pv-border-color);
      white-space: nowrap;
    }

    /* Metadata (always-visible key-value rows) */
    .pv-metadata {
      margin: 4px 0 6px 0;
      font-size: 0.92em;
      line-height: 1.5;
    }

    .pv-meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 1px 14px;
      padding: 1px 0;
    }

    .pv-meta-row-label {
      color: var(--pv-font-color2);
      font-weight: 500;
      white-space: nowrap;
      min-width: 60px;
    }

    .pv-meta-entry {
      white-space: nowrap;
    }

    /* Copy-to-clipboard button */
    .pv-copy-btn {
      display: inline-block;
      cursor: pointer;
      opacity: 0.5;
      font-size: 0.85em;
      padding: 0 3px;
      vertical-align: middle;
      transition: opacity 0.15s;
      user-select: none;
      border: none;
      background: none;
      color: var(--pv-font-color3);
    }

    .pv-copy-btn:hover {
      opacity: 1;
      color: var(--pv-font-color0);
    }

    .pv-meta-label {
      color: var(--pv-font-color3);
      font-weight: 400;
      padding-right: 2px;
    }

    /* Sections grid */
    .pv-sections {
      padding-left: 0 !important;
      display: grid;
      grid-template-columns: 150px auto auto auto 1fr 20px 20px;
      margin-block-start: 0;
      margin-block-end: 0;
      list-style: none;
    }

    .pv-section-item {
      display: contents;
    }

    /* Hidden checkbox for expand/collapse */
    .pv-section-item > input {
      display: block;
      opacity: 0;
      height: 0;
      margin: 0;
    }

    .pv-section-item > input + label {
      color: var(--pv-disabled-color);
    }

    .pv-section-item > input:enabled + label {
      cursor: pointer;
      color: var(--pv-font-color2);
    }

    .pv-section-item > input:enabled + label:hover {
      color: var(--pv-font-color0);
    }

    /* Section summary (left column label) */
    .pv-section-summary {
      grid-column: 1;
      color: var(--pv-font-color2);
      font-weight: 500;
      white-space: nowrap;
    }

    .pv-section-summary > span {
      display: inline-block;
      padding-left: 0.3em;
    }

    .pv-section-summary-in:disabled + label {
      color: var(--pv-font-color2);
    }

    /* Expand/collapse arrows */
    .pv-section-summary-in + label:before {
      display: inline-block;
      content: "\25b6";
      font-size: 11px;
      width: 15px;
      text-align: center;
    }

    .pv-section-summary-in:disabled + label:before {
      color: var(--pv-disabled-color);
    }

    .pv-section-summary-in:checked + label:before {
      content: "\25bc";
    }

    .pv-section-summary-in:checked + label > span {
      display: none;
    }

    .pv-section-summary,
    .pv-section-inline-details {
      padding-top: 4px;
    }

    .pv-section-inline-details {
      grid-column: 2 / -1;
    }

    .pv-section-details {
      grid-column: 1 / -1;
      margin-top: 4px;
      margin-bottom: 5px;
    }

    .pv-section-summary-in ~ .pv-section-details {
      display: none;
    }

    .pv-section-summary-in:checked ~ .pv-section-inline-details {
      display: none;
    }

    .pv-section-summary-in:checked ~ .pv-section-details {
      display: block;
    }

    .pv-section-summary-in:checked ~ .pv-section-details:has(.pv-var-list) {
      display: contents;
    }

    /* Variable (array) list */
    .pv-var-list,
    .pv-var-item {
      display: contents;
    }

    .pv-var-item > div,
    .pv-var-item label,
    .pv-var-item > .pv-var-name span {
      background-color: var(--pv-background-color-row-even);
      border-color: var(--pv-background-color-row-odd);
      margin-bottom: 0;
      padding-top: 2px;
    }

    .pv-var-list > li:nth-child(odd) > div,
    .pv-var-list > li:nth-child(odd) > label,
    .pv-var-list > li:nth-child(odd) > .pv-var-name span {
      background-color: var(--pv-background-color-row-odd);
      border-color: var(--pv-background-color-row-even);
    }

    .pv-var-name {
      grid-column: 1;
    }

    .pv-var-dims {
      grid-column: 2;
    }

    .pv-var-dtype {
      grid-column: 3;
      text-align: right;
      color: var(--pv-font-color2);
    }

    .pv-var-range {
      grid-column: 4;
      color: var(--pv-font-color3);
      font-size: 0.92em;
    }

    .pv-var-badges {
      grid-column: 5;
      padding-left: 8px;
    }

    .pv-var-name,
    .pv-var-dims,
    .pv-var-dtype,
    .pv-var-range {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      padding-right: 10px;
    }

    .pv-var-name:hover,
    .pv-var-dims:hover,
    .pv-var-dtype:hover,
    .pv-var-range:hover {
      overflow: visible;
      width: auto;
      z-index: 1;
    }

    .pv-var-name span {
      padding-left: 25px !important;
    }

    .pv-var-name-active span {
      font-weight: 600;
    }

    /* Badges */
    .pv-badge {
      display: inline-block;
      font-size: 0.75em;
      font-weight: 600;
      padding: 1px 5px;
      border-radius: 3px;
      vertical-align: middle;
      line-height: 1.4;
    }

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

    .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 */
    .pv-logo {
      display: flex;
      align-items: center;
      flex-shrink: 0;
    }

    .pv-logo svg {
      width: 28px;
      height: 28px;
    }

    .pv-brand-logo {
      display: flex;
      align-items: center;
      flex-shrink: 0;
    }

    .pv-brand-logo svg {
      height: 20px;
      width: auto;
    }

    /* Children list (MultiBlock / PartitionedDataSet) */
    .pv-children-list {
      padding-left: 25px !important;
      list-style: none;
    }

    .pv-children-list li {
      padding: 1px 0;
    }

    .pv-child-name {
      font-weight: 500;
    }

    .pv-child-type {
      color: var(--pv-font-color2);
      font-style: italic;
    }

    .pv-child-type:before {
      content: "\00b7";
      padding: 0 6px;
      font-style: normal;
    }

    .pv-child-detail {
      color: var(--pv-font-color3);
      font-size: 0.9em;
    }

    .pv-child-detail:not(:empty):before {
      content: "\00b7";
      padding: 0 6px;
    }
    </style><pre class='pv-text-repr-fallback'>PolyData (0x7f6fab3a1ae0)
      N Cells:    753716
      N Points:   488880
      N Strips:   0
      X Bounds:   -5.052e+01, 4.945e+01
      Y Bounds:   -6.144e+01, 6.144e+01
      Z Bounds:   -4.577e+01, 6.388e+00
      N Arrays:   2</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-pd-g1" x1="0" y1="0" x2="1" y2="1">
          <stop offset="0%" stop-color="#ffd040"/>
          <stop offset="100%" stop-color="#376fa0"/>
        </linearGradient>
      </defs>
      <polygon points="6,6 22,4 14,16" fill="#376fa0" opacity="0.9"/>
      <polygon points="22,4 28,16 14,16" fill="url(#pv-pd-g1)" opacity="0.85"/>
      <polygon points="6,6 14,16 4,26" fill="#1a4a70" opacity="0.85"/>
      <polygon points="14,16 28,16 20,28" fill="#376fa0" opacity="0.8"/>
      <polygon points="4,26 14,16 20,28" fill="#ffd040" opacity="0.8"/>
      <g stroke="rgba(255,255,255,0.65)" stroke-width="0.6" fill="none">
        <line x1="6" y1="6" x2="22" y2="4"/>
        <line x1="22" y1="4" x2="28" y2="16"/>
        <line x1="28" y1="16" x2="20" y2="28"/>
        <line x1="20" y1="28" x2="4" y2="26"/>
        <line x1="4" y1="26" x2="6" y2="6"/>
        <line x1="6" y1="6" x2="14" y2="16"/>
        <line x1="22" y1="4" x2="14" y2="16"/>
        <line x1="28" y1="16" x2="14" y2="16"/>
        <line x1="14" y1="16" x2="4" y2="26"/>
        <line x1="14" y1="16" x2="20" y2="28"/>
      </g>
      <g fill="rgba(255,255,255,0.85)">
        <circle cx="6" cy="6" r="1.3"/>
        <circle cx="22" cy="4" r="1.3"/>
        <circle cx="28" cy="16" r="1.3"/>
        <circle cx="14" cy="16" r="1.3"/>
        <circle cx="20" cy="28" r="1.3"/>
        <circle cx="4" cy="26" r="1.3"/>
      </g>
    </svg>
    </span><div class='pv-header-text'><div class='pv-obj-type'>PolyData <span class='pv-header-badge'>488,880 points</span> <span class='pv-header-badge'>753,716 cells</span> <span class='pv-header-badge'>34.9 MiB</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='(-50.516562808, 49.445007453, -61.44230342071006, 61.44230342071006, -45.772995131000016, 6.388220916)' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button><span class='pv-meta-entry'><span class='pv-meta-label'>X</span> [-5.052e+01, 4.945e+01]</span><span class='pv-meta-entry'><span class='pv-meta-label'>Y</span> [-6.144e+01, 6.144e+01]</span><span class='pv-meta-entry'><span class='pv-meta-label'>Z</span> [-4.577e+01, 6.388e+00]</span></div><div class='pv-meta-row pv-copyable'><span class='pv-meta-row-label'>Cells</span><span class='pv-meta-entry'><span class='pv-meta-label'>faces</span> 751,374</span><span class='pv-meta-entry'><span class='pv-meta-label'>lines</span> 2,342</span></div></div><ul class='pv-sections'><li class='pv-section-item'><input id='section-645a648a-1f65-404f-b679-5e48e8bfb34d' class='pv-section-summary-in' type='checkbox' checked /><label for='section-645a648a-1f65-404f-b679-5e48e8bfb34d' class='pv-section-summary' title='Expand/collapse section'>Field Data: <span>(2)</span></label><div class='pv-section-inline-details'></div><div class='pv-section-details'><ul class='pv-var-list'><li class='pv-var-item'><div class='pv-var-name'><span>cad.source_format</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='cad.source_format' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>(1,)</div><div class='pv-var-dtype'>&lt;U4</div><div class='pv-var-range'></div><div class='pv-var-badges'></div></li><li class='pv-var-item'><div class='pv-var-name'><span>cad.backend</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='cad.backend' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>(1,)</div><div class='pv-var-dtype'>&lt;U6</div><div class='pv-var-range'></div><div class='pv-var-badges'></div></li></ul></div></li></ul></div></div>
    </div>
    <br />
    <br />

.. GENERATED FROM PYTHON SOURCE LINES 38-43

Compute mean curvature on the impeller surface. Mean curvature
highlights the convex blade ridges and concave hub fillets: the
regions a CFD or stress engineer wants to refine first. (Gaussian
curvature on a near-developable blade is ~0 almost everywhere and
washes out; mean curvature reads far better.)

.. GENERATED FROM PYTHON SOURCE LINES 43-48

.. code-block:: Python


    surface = iges.extract_surface().compute_normals()
    surface['mean_curvature'] = surface.curvature(curv_type='mean')
    surface





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

 .. code-block:: none

    /home/runner/work/pyvista-cad/pyvista-cad/examples/01_readers/read_iges.py:44: PyVistaFutureWarning: The default value of `algorithm` for the filter
    `PolyData.extract_surface` will change in the future. It currently defaults to
    `'dataset_surface'`, but will change to `None`. Explicitly set the `algorithm` keyword to
    silence this warning.
      surface = iges.extract_surface().compute_normals()


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    </style><pre class='pv-text-repr-fallback'>PolyData (0x7f6fab42fe80)
      N Cells:    753716
      N Points:   488880
      N Strips:   0
      X Bounds:   -5.052e+01, 4.945e+01
      Y Bounds:   -6.144e+01, 6.144e+01
      Z Bounds:   -4.577e+01, 6.388e+00
      N Arrays:   7</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-pd-g1" x1="0" y1="0" x2="1" y2="1">
          <stop offset="0%" stop-color="#ffd040"/>
          <stop offset="100%" stop-color="#376fa0"/>
        </linearGradient>
      </defs>
      <polygon points="6,6 22,4 14,16" fill="#376fa0" opacity="0.9"/>
      <polygon points="22,4 28,16 14,16" fill="url(#pv-pd-g1)" opacity="0.85"/>
      <polygon points="6,6 14,16 4,26" fill="#1a4a70" opacity="0.85"/>
      <polygon points="14,16 28,16 20,28" fill="#376fa0" opacity="0.8"/>
      <polygon points="4,26 14,16 20,28" fill="#ffd040" opacity="0.8"/>
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        <line x1="6" y1="6" x2="22" y2="4"/>
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        <line x1="20" y1="28" x2="4" y2="26"/>
        <line x1="4" y1="26" x2="6" y2="6"/>
        <line x1="6" y1="6" x2="14" y2="16"/>
        <line x1="22" y1="4" x2="14" y2="16"/>
        <line x1="28" y1="16" x2="14" y2="16"/>
        <line x1="14" y1="16" x2="4" y2="26"/>
        <line x1="14" y1="16" x2="20" y2="28"/>
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      <g fill="rgba(255,255,255,0.85)">
        <circle cx="6" cy="6" r="1.3"/>
        <circle cx="22" cy="4" r="1.3"/>
        <circle cx="28" cy="16" r="1.3"/>
        <circle cx="14" cy="16" r="1.3"/>
        <circle cx="20" cy="28" r="1.3"/>
        <circle cx="4" cy="26" r="1.3"/>
      </g>
    </svg>
    </span><div class='pv-header-text'><div class='pv-obj-type'>PolyData <span class='pv-header-badge'>488,880 points</span> <span class='pv-header-badge'>753,716 cells</span> <span class='pv-header-badge'>68.0 MiB</span></div></div><span class='pv-brand-logo'><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 90 24">
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        <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='(-50.516562808, 49.445007453, -61.44230342071006, 61.44230342071006, -45.772995131000016, 6.388220916)' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button><span class='pv-meta-entry'><span class='pv-meta-label'>X</span> [-5.052e+01, 4.945e+01]</span><span class='pv-meta-entry'><span class='pv-meta-label'>Y</span> [-6.144e+01, 6.144e+01]</span><span class='pv-meta-entry'><span class='pv-meta-label'>Z</span> [-4.577e+01, 6.388e+00]</span></div><div class='pv-meta-row pv-copyable'><span class='pv-meta-row-label'>Cells</span><span class='pv-meta-entry'><span class='pv-meta-label'>faces</span> 751,374</span><span class='pv-meta-entry'><span class='pv-meta-label'>lines</span> 2,342</span></div></div><ul class='pv-sections'><li class='pv-section-item'><input id='section-45ae78b3-016a-47a3-b4ec-abea73768418' class='pv-section-summary-in' type='checkbox' checked /><label for='section-45ae78b3-016a-47a3-b4ec-abea73768418' class='pv-section-summary' title='Expand/collapse section'>Point Data: <span>(3)</span></label><div class='pv-section-inline-details'>mean_curvature <span class='pv-badge pv-badge-active'>active</span></div><div class='pv-section-details'><ul class='pv-var-list'><li class='pv-var-item'><div class='pv-var-name'><span>vtkOriginalPointIds</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='vtkOriginalPointIds' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>scalar</div><div class='pv-var-dtype'>int64</div><div class='pv-var-range'>[0.000e+00, 4.889e+05]</div><div class='pv-var-badges'></div></li><li class='pv-var-item'><div class='pv-var-name'><span>Normals</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='Normals' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>3 comp</div><div class='pv-var-dtype'>float32</div><div class='pv-var-range'>[-1.000e+00, 1.000e+00]</div><div class='pv-var-badges'> <span class='pv-badge pv-badge-normals'>normals</span></div></li><li class='pv-var-item'><div class='pv-var-name pv-var-name-active'><span>mean_curvature</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='mean_curvature' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>scalar</div><div class='pv-var-dtype'>float64</div><div class='pv-var-range'>[-5.647e+00, 2.707e+00]</div><div class='pv-var-badges'> <span class='pv-badge pv-badge-active'>active</span></div></li></ul></div></li><li class='pv-section-item'><input id='section-70e16c97-9f8f-4410-8aa5-598ad5034367' class='pv-section-summary-in' type='checkbox' checked /><label for='section-70e16c97-9f8f-4410-8aa5-598ad5034367' class='pv-section-summary' title='Expand/collapse section'>Cell Data: <span>(2)</span></label><div class='pv-section-inline-details'></div><div class='pv-section-details'><ul class='pv-var-list'><li class='pv-var-item'><div class='pv-var-name'><span>vtkOriginalCellIds</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='vtkOriginalCellIds' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>scalar</div><div class='pv-var-dtype'>int64</div><div class='pv-var-range'>[0.000e+00, 7.537e+05]</div><div class='pv-var-badges'></div></li><li class='pv-var-item'><div class='pv-var-name'><span>Normals</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='Normals' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>3 comp</div><div class='pv-var-dtype'>float32</div><div class='pv-var-range'>[-1.000e+00, 1.000e+00]</div><div class='pv-var-badges'> <span class='pv-badge pv-badge-normals'>normals</span></div></li></ul></div></li><li class='pv-section-item'><input id='section-277f7f4e-79a4-40b3-8dc4-eccc20e3c685' class='pv-section-summary-in' type='checkbox' checked /><label for='section-277f7f4e-79a4-40b3-8dc4-eccc20e3c685' class='pv-section-summary' title='Expand/collapse section'>Field Data: <span>(2)</span></label><div class='pv-section-inline-details'></div><div class='pv-section-details'><ul class='pv-var-list'><li class='pv-var-item'><div class='pv-var-name'><span>cad.source_format</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='cad.source_format' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>(1,)</div><div class='pv-var-dtype'>&lt;U4</div><div class='pv-var-range'></div><div class='pv-var-badges'></div></li><li class='pv-var-item'><div class='pv-var-name'><span>cad.backend</span><button class='pv-copy-btn' title='Copy to clipboard' data-copy='cad.backend' onclick="navigator.clipboard.writeText(this.dataset.copy)">⧉</button></div><div class='pv-var-dims'>(1,)</div><div class='pv-var-dtype'>&lt;U6</div><div class='pv-var-range'></div><div class='pv-var-badges'></div></li></ul></div></li></ul></div></div>
    </div>
    <br />
    <br />

.. GENERATED FROM PYTHON SOURCE LINES 49-53

Render with a diverging colormap centred on zero so flat regions sit
mid-scale and ridges / valleys pop. Symmetric, robust ``clim`` from
the 90th percentile of the absolute curvature keeps a few extreme
outliers from flattening the contrast.

.. GENERATED FROM PYTHON SOURCE LINES 53-65

.. code-block:: Python


    q = float(np.nanpercentile(np.abs(surface['mean_curvature']), 90))

    pl = pv.Plotter()
    pl.cad.add(
        surface,
        scalars='mean_curvature',
        cmap='RdBu_r',
        clim=(-q, q),
        scalar_bar_args={'title': 'Mean curvature'},
    )
    pl.show()







.. tab-set::



   .. tab-item:: Static Scene



            
     .. image-sg:: /examples/01_readers/images/sphx_glr_read_iges_001.png
        :alt: read iges
        :srcset: /examples/01_readers/images/sphx_glr_read_iges_001.png
        :class: sphx-glr-single-img
     


   .. tab-item:: Interactive Scene



       .. offlineviewer:: /home/runner/work/pyvista-cad/pyvista-cad/doc/examples/01_readers/images/sphx_glr_read_iges_001.vtksz







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

   **Total running time of the script:** (0 minutes 38.858 seconds)


.. _sphx_glr_download_examples_01_readers_read_iges.py:

.. only:: html

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

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

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

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

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

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

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