1 .. _add_node_on_segment_page:
7 This operation cuts triangles into two by adding a node on an edge bounding these triangles.
9 .. image:: ../images/add_node_on_segment.png
14 .. |img| image:: ../images/mesh_split_diag_interactive.png
16 #. Select a mesh and display it in the 3D Viewer.
17 #. In the **Modification** menu select the **Add node on segment** item or click *"Add node on segment"* button |img| in the toolbar.
19 The following dialog box will appear:
21 .. image:: ../images/add_node_on_segment-dlg.png
25 #. Enter IDs of nodes forming the edge in the **Edge** field (the node IDs must be separated by a dash) or select the edge in the 3D viewer.
27 #. Enter location of a new node on the edge which is defined as a real number in the range between 0.0 and 1.0. You can define it
29 * by clicking with your mouse on the edge in the Viewer,
30 * by typing a number in a field,
31 * by setting a number using arrows of a spin box.
33 #. Activate **Preview** to see a result of the operation.
35 #. Click the **Apply** or **Apply and Close** button to confirm the operation.
37 **See Also** a sample TUI Script of a :ref:`tui_cutting_triangles` operation.