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 occur if vertices, lines or faces are on the cutting line.

Robust

It gives priority to the 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 makes 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 symmetric editing.

Continual cut

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

Click a point on the line you want to cut. When you click with pressing the Shift key, you can cut off the center of lines.

Original		Click a line		A number of division is increased

When [Regular interval]

Regular interval

If it is checked, [Continual cut] divides equally lines by the specified number.

Regular interval - #3

Divide end triangle

If it is checked, you can cut continually a triangle face which is connected with quadrangle faces.

Divide - ON	OFF

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] option is checked, only lines are erased without deleting vertices.

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