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62 lines
2.1 KiB
Plaintext
62 lines
2.1 KiB
Plaintext
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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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faces. The desired orientation is defined by a vector. Since direction
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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 specified either explicitly or can be found by closeness to
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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 the <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 a way of selection of the control face: by point or
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explicitely.</li>
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<li>Select an \b Object containing faces to reorient, either in the Object
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Browser or in the 3D Viewer; it can be either <ul>
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<li>group of faces,</li>
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<li>sub-mesh of faces or</li>
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<li>mesh.</li>
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</ul></li>
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<li>Specify either coordinates of a \b Point by which the control face
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will be found or the control \b Face it-self. You can easy specify the \b
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Point by either picking a node in the 3D Viewer or by selecting a vertex
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in the Object Browser. The \b Face can be either picked by mouse in
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the 3D Viewer or its ID can be entered by typing.</li>
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<li>Set up a \b Direction to be compared with the normal of the
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control face. You can either pick a node in the 3D Viewer then a \b Direction
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from the coordinate system origin to the selected node will be set,
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or you can pick two nodes (holding Shift button) then a \b Direction
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from the first to the second node will be set.</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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