Center point of a circle

alpro

Andrew, to get the center point of a circle, highlight it, then go to Edit>Circle>Point at center.

Mike

dammerel

Mike
Thanks but my edit menu doesn't have circle on it ?
Andrew

alpro

Andrew, make sure to first select (highlight) the circle, then go to edit.

Mike

sorgesu

There is a faster way. with whatever tool you plan to use, TOUCH and endpoint in one of the segments in the circumference of the circle. Once you remind SketchUp of the circumfernece segment endpoint inferneces, it will also "remember" the center point of the circle so now just move your cursor over where the center aught to be and it will snap for you,

Jean Lemire

Hi Andrew, hi folks.

If you have enabled Extensions with Menu Window --> Preferences --> Extensions (select all of them), you can simply right click on a circle or arc or polygon and then choose the last choice in the contextual menu that will appear "Point at center". In this case, there is no need to select the circle or arc or polygon prior to the right click.

Just ideas.

dammerel

Jean , my extension menu only has sandbox tools
Andrew

SchreiberBike

Susan's trick above works for me most of the time, but sometimes, it just won't for whatever reason. I have the "Set Center Point" ruby installed for those times and for other shapes.

I don't see "Edit>Circle>Point at center" anywhere and I do have all the extensions turned on.

thomthom

No Point at center here either. SUP6.

I use the endpoint inference trick, but when there's many object near or around it it often doesn't want to lock on the centerpoint. No way to further encourage it?

dammerel

so if you have a look at my file housing.skp,
how would you align the dome with the housing ?

Andrew

Gaieus

Andrew,

I "revised" the whole thread here and I guess there is a misunderstanding. The "Point at centre" (or what) command is in the context menu (right click menu) that pops up when you select the circle with the right mouse button and not in the Edit menu.

Well, I simly cannot imagine how you came up with such a disaligned dome shape!

OK. I had a look and found three things:

you cannot use the "Point at cener" command if the entity is not a circle/arc/polygon (whatever whose edges can be selected as a whole and not exploded into its segments). So I made a face for your dome and used the centerpoint.rb on that.
The dome has a base of only a circle with 20 segments while the cylinder above has the default (24) segments. They will never be able to precisely and nicely aligned.
Even the inside and outside facets of your middle ring were not aligned (they were kind of "twisted" out of alignment)

I aligned the dome for you in three steps:

moved it by snapping my new guidepoint to the origin
rotated it along both the red and green axes to make it horizontal
aligned the corresponding endpoints of the cone and ring to show at the same direction (yet see point 2 above - it cannot be perfectly made)

Here's your model in this state

sorgesu

I have always had all extensions enabled and I don't get "point at center" on a right click or on a hard select or anything. Never saw it? Are you sure you guys didn't load someone's ruby script?

Gaieus

I have centerpint.rb but I did indeed disable it to check if its just another place it may reside.
Are you sure that you are only selecting the circle edge (and not the face as well)?

alpro

I didn't load a ruby, I have center point in my edit menu when circle is highlighted and I also have center point in my context menu. SU6 Pro 6.0.1099

Mike

Jean Lemire

Hi Susan, hi folks.

SU 6 Pro Version 6.0.1099 for PC.

See the attached JPG files.

Just ideas.

http://www.sketchucation.com/forums/scf/sas/Newbie/PointAtCenter2.jpg

http://www.sketchucation.com/forums/scf/sas/Newbie/PointAtCenter3.jpg

sorgesu

Doh. I missed the bit about highlighting just the circumferenece. I have it now. Thanks. But generally I think it is faster to use the 'remind" inference. Only when I need to keep the centerpoint for some other use later, would I need the construction point.

dammerel

thank Gaieus for the answer
Andrew

Jim

Just a thought... it's should be possible to make a ruby to always add a centerpoint when drawing a circle.

humanticnc

would be very useful

ronski

Hi, I have also had trouble finding circle centre.

What Susan didn't tell us was, "to use the pencil tool on the segments".

If you draw a circle then still using the pencil the Centre and segments highlight.

Chiefwoodworker

Susan is right. There is no "Point at center" on my SU 6 either. You guys must be drinking a Ruby drink.

Joe....