3 \page reorient_faces_page Reorient faces by vector
5 \n This operation allows changing orientation of a set of neighboring
6 faces. The desired orientation is defined by a vector. Since direction
7 of face normals in the set can be even opposite, it is necessary to
8 specify a control face whose normal will be compared with the vector. This
9 face can be specified either explicitly or can be found by closeness to
12 Orientation of a face is changed by reverting the order of its nodes.
14 <em>To change orientation of faces:</em>
16 <li>In the \b Modification menu select the <b>Reorient faces by
17 vector</b> item or click <em>Reorient faces by
18 vector</em> button in the toolbar.
21 \image html reorient_faces_face.png
22 <em>"Reorient faces by vector" button</em>
25 The following dialog box will appear:
28 \image html reorient_2d_point.png
29 \image html reorient_2d_face.png
34 <li>Specify a way of selection of the control face: by point or
36 <li>Select an \b Object containing faces to reorient, either in the Object
37 Browser or in the 3D Viewer; it can be either <ul>
38 <li>group of faces,</li>
39 <li>sub-mesh of faces or</li>
42 <li>Specify either coordinates of a \b Point by which the control face
43 will be found or the control \b Face it-self. You can easy specify the \b
44 Point by either picking a node in the 3D Viewer or by selecting a vertex
45 in the Object Browser. The \b Face can be either picked by mouse in
46 the 3D Viewer or its ID can be entered by typing.</li>
47 <li>Set up a \b Direction to be compared with the normal of the
48 control face. You can either pick a node in the 3D Viewer then a \b Direction
49 from the coordinate system origin to the selected node will be set,
50 or you can pick two nodes (holding Shift button) then a \b Direction
51 from the first to the second node will be set.</li>
55 <li>Click the \b Apply or <b>Apply and Close</b> button to confirm the operation.</li>
58 <br><b>See Also</b> a sample TUI Script of a
59 \ref tui_reorient_faces "Reorient faces by vector" operation.