# Re: Control points on an arbitrary plane

DELFTship forum Hull modeling Control points on an arbitrary plane Re: Control points on an arbitrary plane

#35273
michael f. berg
Participant

Hi Petter,

I am happy you succeeded.:)
By the way:
When I wrote “rectangle” I meant “rectangle” not “box”. A box consists of six rectangles, of which 5 are not useful for our problem.

Make layer 1 the active layer to accept the next input:
Delftship suggests (0,0,0) in the co-ordinate window.
Insert for x -2
Delftship suggests (0,0,0) again in the co-ordinate window.
Insert for x -2
Insert for y 4
Delftship suggests (0,0,0) again in the co-ordinate window.
Insert for x 5
Delftship suggests (0,0,0) again in the co-ordinate window.
Insert for x 5
Insert for y 4
Look at the four newly generated points in the perspective view
Keep the CTRL key pressed
Select in counter clockwise direction the 1st, 2nd, 3rd, and 4th point
Edit–>Face–>New
You see a sort of ellipse.
Select one after another without CTRL the four points and set the corner property in the co-ordinate window.
Then you have a rectangle, flat and 2 dimensional…

In intersecting layers
the first layer, where you want the new points inserted (here layer 0), must have a fine control grid. The fineness of the one where you take the cut from (here layer 1) does not matter.
This is because only the edges of the first layer are tested where they dissect the faces of the second layer.

Oh, please, try this as well: I love to be right.:)

We are learning every day by doing and
we learn from examples and counter examples and from errors.:lol:

Kindest regards
michaelf

PS: I do the rotations separately first for the x-axis then for the y-axis.
One funny thing about rotations is: The result depends on what you do first.
Try it with a dice…