2012-08-09 16:03:55 +06:00
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/*!
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\page reorient_faces_page Reorient faces by vector
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\n This operation allows changing orientation of a set of neighboring
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2012-12-13 17:41:29 +06:00
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faces. The desired orientation is defined by a vector. Since the direction
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2012-08-09 16:03:55 +06:00
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of face normals in the set can be even opposite, it is necessary to
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specify a control face whose normal will be compared with the vector. This
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face can be either specified explicitly or found by proximity to
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2012-08-09 16:03:55 +06:00
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a given point.
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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 by
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vector</b> item or click <em>Reorient faces by
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vector</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 by vector" 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
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\image html reorient_2d_face.png
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</center>
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<li>In this dialog
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<ul>
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<li>Specify the way of selection of the control face: by point or
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explicitly.</li>
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<li>Select the \b Object (mesh, sub-mesh or a group of faces) containing faces to reorient in the Object Browser or in the 3D Viewer.</li>
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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 of 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>
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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 by vector" operation.
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*/
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