+++ /dev/null
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-.. _reorient_faces_page:
-
-************
-Orient faces
-************
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-This operation allows fixing the orientation of a set of faces in the following ways:
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-* The required orientation of a set of neighboring faces can be defined by a vector giving the direction of a normal to a certain face. Since the direction of face normals in the set can be even opposite, it is necessary to specify a *control* face, the normal to which will be compared with the vector. This face can be either:
- * found by proximity to a given point, or
- * specified explicitly.
-* The required orientation is given by faces of specified reference groups or/and sub-meshes. The reference groups can be omitted, then orientation of an arbitrary selected face to orient defines common orientation.
-* Alternatively, the faces can be oriented relatively to the adjacent volumes.
-
-The orientation of a face is changed by reverting the order of its nodes.
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-*To set orientation of faces:*
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-.. |imgfac| image:: ../images/reorient_faces_face.png
-.. |imgpnt| image:: ../images/reorient_faces_point.png
-.. |imggrp| image:: ../images/reorient_faces_ref_groups.png
-.. |imgvol| image:: ../images/reorient_faces_volume.png
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-#. In the **Modification** menu select **Reorient faces** item or click *"Reorient faces"* button |imgfac| in the toolbar.
-#. In the "Reorient faces" dialog box
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- * Select a way to define orientation:
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- * |imgpnt| - by specifying a point and a vector
- * |imgfac| - by specifying a face and a vector
- * |imggrp| - by specifying reference face groups
- * |imgvol| - by specifying reference volume groups
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- * Select the **Object(s)** (mesh, groups and/or sub-meshes) containing faces to reorient, in the Object Browser or in the 3D Viewer.
- * To reorient by direction of the face normal:
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- * Specify the coordinates of the **Point** by which the control face will be found. You can specify the **Point** by picking a node in the 3D Viewer or selecting a vertex in the Object Browser.
- * Set up the **Direction** vector to be compared with the normal of the control face. There are following options:
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- * adjust vector components directly;
- * select a vertex in the Object Browser or a node in the 3D Viewer; their coordinates will define vector components;
- * pick two nodes (holding Shift button), the **Direction** vector will go from the first to the second node.
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- .. image:: ../images/reorient_2d_point.png
- :align: center
-
- .. centered::
- The orientation of adjacent faces is chosen according to a vector. The control face is found by point.
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- * In the second mode it is possible to pick the **Face** by mouse in the 3D Viewer or directly enter the **Face** ID in the corresponding field.
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- .. image:: ../images/reorient_2d_face.png
- :align: center
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- .. centered::
- The orientation of adjacent faces is chosen according to a vector. The control face is explicitly given.
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- * In the third mode, the faces can be reoriented equally to reference faces:
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- * If necessary, select 2D **Reference objects** (groups or/and sub-meshes) containing the reference faces, in the Object Browser or in the 3D Viewer. This field can be left empty, then orientation of an arbitrary face will be used as a reference.
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- .. image:: ../images/reorient_2d_refgroup.png
- :align: center
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- .. centered::
- The orientation of faces is given by reference face groups and/or sub-meshes.
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- * In the fourth mode, the faces can be reoriented according to volumes:
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- * Select an object (mesh, sub-mesh or group) containing reference **Volumes**, in the Object Browser or in the 3D Viewer.
- * Specify whether face normals should point outside or inside the reference volumes using **Face normal outside volume** check-box.
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- .. image:: ../images/reorient_2d_volume.png
- :align: center
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- .. centered::
- The orientation of faces is chosen relatively to adjacent volumes.
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-#. Click the **Apply** or **Apply and Close** button to confirm the operation.
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-**See Also** a sample TUI Script of a :ref:`tui_reorient_faces` operation.
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