It changes so that the form of "object axis" may grow into the form of BG curve.

The method of modification changes with the positions and directions which sets up "object axis".

"object axis" is the straight line which faces to a point-2 from the selected point-1.
It defines a position and a direction.

The direction of "object axis" consists of the starting point of a curve in the direction of end terminal.

Let's perform :

*1
The place of a point-1 and a point-2 may have between.
The position and direction of an axis were determined now.
Next, additional selection of all the points to change is carried out.

*
The form of "object axis" became the same as BG curve.
The portion of the outside of a curve is expands.

*2
Change and perform the position of "object axis".

*
The form of "object axis" became the same as BG curve.
The portion of the inside of a curve was compressed and has broken.
An object will be broken in the inner side of a rapid curve.

*3
It is the case where "object axis" is made slanting.

*
"object axis" is drawn so that it may be easy to understand.

*
The form of "object axis" became the same as BG curve.

*4
When the point which specifies "object axis" is not found in an object.
I want to specify a center !

*
In order to set up "object axis", two new points were added.

*
The two points are chosen and it is made "object axis".

*
What is necessary is just to delete those points later.

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