I draw the control points A in the right screen but I get the result B?

Hmmmnn!

Not very happy at the moment. ggggrrrr!

Brian

A second proof of the problem?
I can not get a trim to work?

Brian

Hi Brian, if you hide the surface and just look at the curve and rotate around it a little bit you can see that it is kind of bent around and is not a flat planar shape.

To trim a surface with a curve like that, the curve must be planar so it knows which direction to project itself along.

The easiest way to do this is to go to the front view, select the curve, then squish it down using the edit frame, grab one of the corners and move it over until you see the "flat" snap kick in.

After I flattened the curve, then it will work to trim or boolean your surface with the curve.

- Michael

Michael
Yes, I think I know that way of "fixing".

BUT, why will the line not simply draw Planar in the simple Right view (as it was)? (or, if you like, front or maybe top view?)

A line being continuously drawn should remain "flat" when being drawn in a "flat" plane should it not?

Brian

Michael
Here is a brand new line drawn in the right view which, again, wont trim the sphere because of the twist.
Brian

Hi Brian,

> A line being continuously drawn should remain "flat" when
> being drawn in a "flat" plane should it not?

Yes, it is supposed to, unless you have turned off the setting for it...

Can you go to Options / Snaps / Object snap options and see if the option for "Project to plane in ortho views" is turned on or off? It should be on to force planar drawing in the 2D views.

Otherwise could you please give me some more details on how you are drawing it, are you picking every single point in the Right view and none in the 3D view?

- Michael

These are the default settings ?
Are they not as they should be?(Sorry for the trouble)
Brian

Hi Brian,

> These are the default settings ?

Yup, except for tangent snapping turned off, but that should not have anything to do with this.


> Are they not as they should be?(Sorry for the trouble)

Yup, that part does not seem to be the problem.


Can you describe in a bit more detail how you are drawing the curve again? I cannot repeat the problem over here when drawing in the side view. If you pick any points in the 3D view stuff like that could happen but when that setting is turned on, points picked in the 2D views are supposed to generate 2D flat curves.

- Michael

Michael.

Starting from scratch.

Insert a sphere
Go to Right View
Draw a Control Points line
Attempt a Trim--not working?

Brian

Hi Brian, I don't really know how you're getting it but one section of your points are on on the world plane where I would expect, and then the second half of your points are on a different depth.

What happens if you turn off all the snaps - that is click on "Grid Snap", "Straight Snap", and "Object Snap" in the bottom toolbar so they are not highlighted in orange anymore. Does that make any difference for you?

I am not able to reproduce your problem over here - I've attached what happens here when I use a control point curve clicking every point for it in the right-side view.


Are you possibly getting some construction lines kicking in? I mean do you see any long dashed lines popping up while you are drawing the curve?

Any other possible details that you can think of, like do you tend to use undo while drawing the curve a bunch, adjust your view, any stuff like that?


- Michael

I think I know what is happening, you're tracking along a surface normal line for one of the points.

If you look closely, you will probably see a long dashed line with a label that says "normal" on it - that is the tracking line that is messing up your curve.

Probably the easiest way for you to get rid of that at the moment is to disable Straight Snap on the bottom toolbar (click it so it is not orange). That will eliminate that tracking line which I can see can pretty easily disturb drawing in that 2D viewport.

I probably should disable that surface-normal line when drawing in a 2D viewport. I've been actually thinking of disabling all the stuff related to the new-for-v2 "on surface" object snap in those 2D views because they can tend to get in the way of simple 2D drawing.

I will try to get these tuned up for the next beta so that they won't cause this problem anymore, but for the moment turning off Straight Snap should do it.

- Michael

Michael
I hope this makes sense and is helpful.

With Straght Snap ON
Get 3 things as drawing a line; variations--- tag "On Srf"; and/orTag "Normal, and/or construction lines
Special note. However, if I draw a series of lines separately, one after another, there are variations between each. Some are "twisted", some are "flat".

With Straight Snap OFF.
Consistently only the "On Srf" tag. Flat.
Doing repeat lines still all flat.

Think that clarifies that a gremlin is involved I think?

Thanks for the temporary solution.

Brian