General mesh editing commands

Selected meshes can be deleted, copies, pasted, or merged simply by issuing the corresponding menu item.

> Undoing mesh generation

In order to cancel the last mesh generation, select "Undo" item of menu immediately after the mesh generation. Undoing will remove all meshes generated by the last processing, regardless of the method of mesh generation. For example, if meshes are generated by multiple sets of duplication, all the duplicated sets will be removed by undoing. After undoing, the menu item changes into "Redo". Selecting the item again will recover the meshes and revert the menu item into "Undo" Thus, "Undo", and "Redo" alternates as the menu item.

> Deleting meshes

In order to delete meshes, first activate the corresponding object selection tool. In other words, click the curve selection tool to delete frame members if it is not currently in action. Click the surface or the volume mesh selection tool to delete surface or volume meshes respectively. In the next step, select the objects to delete, and select "Clear" item from menu, or press key.

When a mesh of any type is deleted, its subordinate objects are also deleted. For example, if a volume mesh is deleted, all surface meshes and curves belonging to the mesh are deleted. However, the seed meshes or seed curves used for generation of the mesh are not deleted. And, surface meshes and curves shared with other volume meshes will not be deleted. Likewise, if a surface mesh is deleted, all the curves, except seed curves, belonging to the mesh are deleted. Curves shared with other meshes will not be deleted. Accordingly, a volume mesh should first be deleted in order to delete surface meshes belonging to the volume mesh, Nodes and elements cannot be deleted individually. In order to delete them, all the meshes possessing them should be deleted.

> Copying meshes

In order to copy meshes of any object type, select the objects to copy, and select "Copy" item from menu. The copied meshes are stored in the computer memory and can be pasted later.

> Cutting meshes

Cutting deletes the selected meshes, and at the same time, stores the deleted meshes in the computer memory. This is done by "Cut" command in menu, and has the same effect as deleting after copying the selected meshes.

> Pasting meshes

"Paste" command in menu is enabled only when there exist objects of any type stored in the memory by "Cut" or "Copy" command. Otherwise, the item is dimmed and cannot be selected. When meshes have been stored in the computer memory, "Paste" command recovers and pastes them on the screen

> Merging meshes

Two or more meshes can be merged into one. It is sometimes more convenient to handle a large lump than a number of small pieces. Or, it may be better to treat a few adjacent meshes with homogeneous properties as one body. In such cases, merging meshes is very useful. Merged meshes form a single object. Only meshes of the same object type can be merged. In order to merge surface meshes, first click surface selection tool , if it is not in action. Select two or more surface meshes. Then, "Link" item in menu is enabled. Selecting the item will merge the meshes into one. Likewise, volume meshes can be merged by issuing "Link" command after selecting two or more volume meshes using volume selection tool .

"Link" command for meshes can be canceled by "Undo" command in the same menu immediately after the action. However, once merging is completed, the merged meshes cannot be separated later.