## Knife

[Knife] command provides the following five operations.

### Knife

It cuts a face crossed by a cutting line. And a line crossed by a cutting line is divided even if a cutting line does not cross whole a face.

When you click with pressing Shift key, the line is snapped by the specified angle (5, 10, 15 or 45 degrees).

Original |  | Drag the target line |  | Cut lines after release a mouse button

### Cut

It separates faces inside a line or a box into a new object.

Separated object shows in [Object Panel].

Cut mode - [Line]

  Original |  | A line is shown by dragging |  | An object is separated when a button is released

Cut mode [Box]

  Original |  | A box is shown by dragging |  | An object is separated when a button is released

  It specifies the algorithm of cut.
  Fast
    This algorithm performs processing faster. Even objects with many vertices can be processed in a short time. But the result may become broken or an error will be occurred, if vertices, lines or faces are on the cutting line.
  Robust
    It gives priority to stability of processing. It takes time to process objects with many vertices. Compared with [Fast], errors are hard to occur.
  If processing is failed, retry with closing an object's hole by [Hole] command or changing cut position a little.

### Hole

It make a hole inside the specified region by clicking on the multiple points and right clicking.

When you click with pressing Shift key, each point is snapped from the previous point by the specified angle (5, 10, 15 or 45 degrees).

Original |  | Put multiple points to make a hole |  | Make a hole by clicking a right button

A center face cannot be cut by a symmetric editing.

### Continual cut

It cuts off the adjacent quadrangle faces continuously. This can be used in increasing the number of the vertices with cutting a cylinder in round slices.

Please drag a mouse between the facing lines of a quadrangle. When you drag a mouse with pressing the Shift key, you can cut off joining the both center of lines.

Original |  | Drag between facing lines |  | A number of division is increased

### Continual erase

It behaves quite contrary to [Cut straight faces]. It combines two quadrangles first and continues to combine adjacent two quadrangles.

When the [Keep vertices] options is checked, only lines are erased without deleting vertices.

Original |  | Click a line |  | The line is deleted, and the number of division is decreased.