Can someone explain how to understand Cutplane with three ar

[Anonymous]

I've been struggeling lately to understand cutplane with three arguments.
I really can't understand where the cutplane is drawn so it would contain all three arguments.
I had a hypotesis, and I drew a plan in an coordinate system that had
4 corners. It was coordinates to 1.corner: argumentX,0,0, coordinates to 2.corner: 0, argumentY,0, and then I made a paralellogram that connected these corners to two points on a paralell line to the line between the two first corners in the xy-plane, but placed at the height that the argumentZ defined.
But when I tried to use this "new knowlede", I figured out my hypotesis must be wrong.

[Anonymous]

What I really want to do, that is the background for my struggles, is to have a possibilyty to use a cutplane that cuts through the XZ-plane with 90 degrees, and through the YZ-plane at an arbitrary angle.

[Anonymous]

Hi Anne,

it hase to work as in the image. (I hope it)

Best Regards,

[Anonymous]

I think you (and I) are absolutely right. Now I went back to the original object I wanted to cut, and thought more easily an practical about it, and suddenly I understood.
Sometimes "I'm lost in space".

[Anonymous]

I don't see how that cutplane cuts through the X-Z plane at 90-degrees, and through the Y-Z plane at an arbitrary angle. Am I missing something?

[Barry Kelly]

The example shown doesn't do this.
CUTPLANE angle will give you a cutplan perpendicular to the X-Z plane and at an angle specified around the y-axis.

CUTPLANE x,y,z creates a cutplane that passes through points x distance along the x-axis, y distance along the y-axis and z units along the z-axis.
It can never be perpendicular to any of the axii because you would need to specify an infinite distance to one of the values which is not possible.
However specifying a distance of 0 (zero) to one of the values will ensure the cutplane is perpendicular to that axis (and passing through absolute zero 0,0,0).

At least that is my understanding of the CUTPLANE command.

Barry.

[Anonymous]

I have found it almost always easier to make some transformations and use the basic CUTPLANE without arguments. For example:

addx A
roty 90
CUTPLANE
del 2

! stuff to be cut...

CUTEND

[Anonymous]

Right. I thought that the image in a previous post was somehow supposed to _show_ a solution to the question that was originally posed, rather than illustrate how CUTEND x,y,z works.