{
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    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
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      },
      "outputs": [],
      "source": [
        "%matplotlib inline"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "# Picking Meshes {#mesh_picking_example}\n\nThis example demonstrates how to pick meshes using\n`enable_mesh_picking() <pyvista.Plotter.enable_mesh_picking>`{.interpreted-text\nrole=\"func\"}.\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "import pyvista as pv"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "# Pick either a cube or a sphere using \\\"p\\\"\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "sphere = pv.Sphere(center=(1, 0, 0))\ncube = pv.Cube()\n\npl = pv.Plotter()\npl.add_mesh(sphere, color='r')\npl.add_mesh(cube, color='b')\npl.enable_mesh_picking()\npl.show()"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "# Deform the mesh after picking\n\nPick to trigger a callback that \\\"shrinks\\\" the mesh each time it\\'s\nselected.\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "def callback(mesh):\n    \"\"\"Shrink the mesh each time it's clicked.\"\"\"\n    shrunk = mesh.shrink(0.9)\n    mesh.copy_from(shrunk)  # make operation \"in-place\" by replacing the original mesh\n\n\npl = pv.Plotter()\npl.add_mesh(sphere, color='r')\npl.add_mesh(cube, color='b')\npl.enable_mesh_picking(callback=callback, show=False)\npl.show()"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "# Pick based on Actors\n\nReturn the picked actor to the callback\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "pl = pv.Plotter()\npl.add_mesh(pv.Cone(center=(0, 0, 0)), name='Cone')\npl.add_mesh(pv.Cube(center=(1, 0, 0)), name='Cube')\npl.add_mesh(pv.Sphere(center=(1, 1, 0)), name='Sphere')\npl.add_mesh(pv.Cylinder(center=(0, 1, 0)), name='Cylinder')\n\n\ndef reset():\n    for a in pl.renderer.actors.values():\n        if isinstance(a, pv.Actor):\n            a.prop.color = 'lightblue'\n            a.prop.show_edges = False\n\n\ndef callback(actor):\n    reset()\n    actor.prop.color = 'green'\n    actor.prop.show_edges = True\n\n\npl.enable_mesh_picking(callback, use_actor=True, show=False)\npl.show()"
      ]
    }
  ],
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      "display_name": "Python 3",
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      "file_extension": ".py",
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      "pygments_lexer": "ipython3",
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