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arc center outside sketch

Genius
Genius
I find this cross symbol in a file created by others. It seems to be the cernter of an arc, and
 
  • appears when the mouse cursor goes over an arc,
  • disappears when refreshing the view.
 What is its role and how to set it to show or hide? Thanks!
 
Image.png
9 REPLIES

Re: arc center outside sketch

Siemens Phenom Siemens Phenom
Siemens Phenom
Hi,

This cross always appears at the center point when you move your cursor over an circle or ellipse. This happens for all wireframe geometry. When it is not removed automatically, it will disappear when you refresh or move the cursor outside the graphics window.

Regards, **bleep**

Re: arc center outside sketch

Genius
Genius

Hi @DickBaardse      It does not always show up. Thanks!

 

Image.png

Re: arc center outside sketch

Siemens Legend Siemens Legend
Siemens Legend

Hi Surfactant,

 

The points you see highlighting when moving the cursor over geometry on the screen are Snap Points - guiding to the desired/required selection while creating e.g. a line from one point to another. Curve/Edge enteties Snap Points are definied by the type of curve and creation parameters. You can tune the Snap Point filter to what points you want to snap to at the top on the Top Border Bar. Sould you desire not to snap to these points at all you can toggle it off compleetely, see the attached image of the Snap Points on the Top Border Bar. The "ghost" of snap points will remain while in teh creation process in a function, you can use F5 to refresh and make them go away. The snap points will disapear when exiting a function.

 

Best Regards

Fred

Re: arc center outside sketch

Genius
Genius

Hi @Sandman Please refer to pictures below. Thanks!

 

Image.pngWhen the mouse cursor touches only the arc, the cross would not appear.


Image.pngOny when the mouse cursor touches the arc center, the cross would appear.

 

Image.pngIn the example of my original post, when the mouse touch the arc (not the center), the cross appears at once! Therefore, this coss seems to be different from the Snap Point.

Re: arc center outside sketch

Genius
Genius
Please refer to the attached prt file.
 
When the mouse cursor touches the green arc, the cross appears.
When the mouse cursor touches the red arc, the cross does not appear.
 
When the mouse cursor touches the arc centers, the cross appears for both arcs.
 
Image.png

Re: arc center outside sketch

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

From what I've seen...

NX selects the arc center if the center of the selection circle/crosshairs is INSIDE the arc

NX selects the _arc_        if the center of the selection circle/crosshairs is OUTSIDE the arc (not sure what point it selects if you can only select points)

Ken Akerboom Sr CAx Systems Engr, Moog, Inc.
Production: NX10.0.3.5 MP16/TC11.2
I'd rather be e-steamed than e-diseaseled


Re: arc center outside sketch

Genius
Genius

Hi @Ken_A   Thanks for your comments!

 

Here is not the issue of selection, but the issue of the appearance of the cross when the mouse cursor touches (NOT clicks) certain elements.

Re: arc center outside sketch

Siemens Legend Siemens Legend
Siemens Legend

Hi Surfactant,

 

This is due to smart selection behavior. The Green Circle in your part is an Explicit Cure (no feature - doesn't show in the PNT - this is a legacy type of curve). The Blue Circle in your part is a Curve Feature and shows up in the PNT. There is a difference in behavior of these curves. The explicit curve can be edited but have no associative behavior. The Curve Feature (Blue) is fully associative and will modified if related to any other geometry changing while editing a part. The smart selection behavior indicates what type the curves are and how you can edit them or associate the with other geometry (dependency). With the selection filter set to "No Selection Filter" a behavior based on how most people like to filter through the entities and uses a selection hierarchy where the feature is at the top and favored. How and what you select helps you create/edit what you want e.g if you are creating a line you might want it to start from the center of the arc or at the tangent of the arc. The Snap Points indicate the way you should select and helps to you guide you to the desired behavior for what you are about to create/edit. Clicking on the inside of the arc (still touching the arc) or on the snap point at the center will snap the start of the line from the center point, clicking on the outside but still on the arc will give you a line starting tangentially from the arc…. Setting the selection filter to “Curve” will give you the same behavior for both the curves in your model.

 

Best regards

Fred

Re: arc center outside sketch

Genius
Genius

Hi @Sandman   Very clear. Thank you for the detailed explanation!