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74 lines
2.8 KiB
Plaintext
74 lines
2.8 KiB
Plaintext
/*!
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\page reorient_faces_page Reorient faces
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\n This operation allows changing orientation of faces two ways.
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<ol>
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<li> To reorient a set of neighboring faces by defining the desired
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orientation by a vector. <br> Since the direction of face normals in
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the set can be even opposite, it is necessary to specify a control
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face whose normal will be compared with the vector. This face can be
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either <ul>
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<li> found by proximity to a given point or </li>
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<li> specified explicitly. </li>
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</ul> </li>
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<li> To reorient faces with relation to adjacent volumes. </li>
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</ol>
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Orientation of a face is changed by reverting the order of its nodes.
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<em>To change orientation of faces:</em>
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<ol>
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<li>In the \b Modification menu select <b>Reorient faces</b>
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item or click <em>Reorient faces</em> button in the toolbar.
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<center>
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\image html reorient_faces_face.png
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<em>"Reorient faces" button</em>
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</center>
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The following dialog box will appear:
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<center>
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\image html reorient_2d_point.png "First mode: to reorient adjacent faces according to a vector. The control face is found by point."
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<br>
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\image html reorient_2d_face.png "Second mode: to reorient adjacent faces according to a vector. The control face is explicitly given."
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<br>
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\image html reorient_2d_volume.png "Third mode: to reorient faces with relation to adjacent volumes."
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</center>
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<li>In this dialog
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<ul>
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<li>Specify either of the tree operation modes.</li>
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<li>Select the \b Object (mesh, sub-mesh or group)
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containing faces to reorient, in the Object Browser or in the 3D
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Viewer.</li>
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<li>To reorient according to vector: <ul>
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<li>Specify the coordinates of the \b Point by which the control face
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will be found or the control \b Face itself. You can easy specify the \b
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Point by either picking a node in the 3D Viewer or selecting a vertex
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in the Object Browser. It is possible to pick the \b Face by mouse in
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the 3D Viewer or enter its ID.</li>
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<li>Set up the \b Direction vector to be compared with the normal of the
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control face. If you pick a node in the 3D Viewer then the \b Direction
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vector will go from the coordinate system origin to the selected node.
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If you pick two nodes (holding Shift button) then the \b Direction vector
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will go from the first to the second node.</li> </ul> </li>
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<li>To reorient according to volumes: <ul>
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<li>Select an object (mesh, sub-mesh or group) containing
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reference \b Volumes, in the Object Browser or in the 3D
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Viewer.</li>
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<li>Specify whether face normals should point outside or inside
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the reference volumes using <b>Face normal outside volume</b>
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check-box.</li></ul> </li>
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</ul>
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</li>
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<li>Click the \b Apply or <b>Apply and Close</b> button to confirm the operation.</li>
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</ol>
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<br><b>See Also</b> a sample TUI Script of a
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\ref tui_reorient_faces "Reorient faces" operation.
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*/
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