Divide command , I can not select or use the segments

[mhkarbala241538]

Divide command

Hey all,

Can you help me with divide command?

when i use this command on an object , i get equal segments.
But I can not use/choose/pick this segments with snaps or any other way that i know. Can i change/choose the point fromwhere the dividing will begin ?

I have a project where i need to divide an ellips to 8 eqaul segments from one specific point,from left farest point of the center of the ellips.

I will use this autocad file in revit to draw the grids which i may need for my columns and beams.

Other question that i have is : Can i divide my object by area or metric (outer circumference) ? can i choose by example to divide an object to 5 equal area's where each area must be 12 m² ( or at least 12 m²) ??

Sorry that my english is not that good.
But i hoop that you can make a video to explain this issue to me.
This way i understand it better

Thank you very much
Boreir

[tedg]

Divide command

Hey all,

Can you help me with divide command?

when i use this command on an object , i get equal segments.
But I can not use/choose/pick this segments with snaps or any other way that i know. Can i change/choose the point fromwhere the dividing will begin ?

I have a project where i need to divide an ellips to 8 eqaul segments from an specific point,from left farest point of the center of the ellips.

I will use this autocad file in revit to draw the grids which i may need for my columns and beams.

Other question that i have is : Can i divide my object by area or metric (outer circumference) ? can i choose by example to divide an object to 5 equal area's where each area must be 12 m² ( or at least 12 m²) ??

Sorry that my english is not that good.
But i hoop that you can make a video to explain this issue to me.

Thank you very much
Boreir
Not sure I understand exactly, but..

When you use the divide command, it places nodes (or points) on the line in equal spaces that you provide. (Unless you use the block option).
Look into the PDMODE variable, and turn on "node" on your osnaps (osmode = 8 )

If you want a set distance, use the MEASURE command, which is similar to divide, but you set the distance, starting at one end of the line.

Hope this helps.

[tedg]

I re-read your questions, and I don't know the answer to all of them, but here's my opinion on some:



when i use this command on an object , i get equal segments.
But I can not use/choose/pick this segments with snaps or any other way that i know.
See my previous post, sounds like you need to use "node" object snap?



Can i change/choose the point fromwhere the dividing will begin ?
I have a project where i need to divide an ellips to 8 eqaul segments from one specific point,from left farest point of the center of the ellipse.
I don't think so, but I may be wrong. I think it is predetermined based on quadrants of an ellipse, circle etc.



Other question that i have is : Can i divide my object by area or metric (outer circumference) ? can i choose by example to divide an object to 5 equal area's where each area must be 12 m² ( or at least 12 m²) ??
I think you need to do some math on this one.
Is this on an ellipse, a circle or something with right angles like a rectangle?

As far as I know, the divide command is only linear, you can't divide by area.
You would need to calculate that area for distance in each direction and use the divide accordingly.
If on a circle you would need to account for radius and circumference to get your area and divide that.

[tedg]

I have a project where i need to divide an ellips to 8 eqaul segments from one specific point,from left farest point of the center of the ellips.
Ok I found out that you can change where you start your divide on a circle or ellipse based on your snapangle.
See attached images, the ellipse is divided by 8 segments, and the snap angle is at 10 degrees.

So you just need to figure out the angle from horizontal to your furthest point and set your snapangle (snapang) to that angle and then use divide.

[mhkarbala241538]

dear Ted ,

Thank you so much. I can pick now this nodes by snap.
But i could not begin dividing from a point of my choice by using snapang.

I writed "snapang" in command bar then i change it from 0° to 20° , then i divide my ellips into 8 segments. But the result is same as before.

[tedg]

dear Ted ,

Thank you so much. I can pick now this nodes by snap.
But i could not begin dividing from a point of my choice by using snapang.

I writed "snapang" in command bar then i change it from 0° to 20° , then i divide my ellips into 8 segments. But the result is same as before.

Sorry, I was mistaken, that only works for CIRCLES. The only reason it worked in my example was because the Ellipse was rotated at that angle as well.

[mhkarbala241538]

Thank you anyway .
I hope that there is another method to choose the starting dividing point.
Otherwise it wil be difficult for me because i dont know how to calculate and divide an ellips bigginnig from a point of my choice.

[jaberwok]

Start by setting PELLIPSE to 1. Instead of a true "Ellipse" object acad will create a closed polyline that approximates an ellipse.
This polyline can be broken at any point you can construct. [Of course it can be broken by eye but that will probably not do for what you want.]
Divide and measure will start from the new end (be carefull how you select).

Edit: PELLIPSE=1 will have no effect on existing ellipses - only ones created after changing this setting.

Edit 2: assuming that the PELLIPSE setting has not been "retired".

[arshiel88]

Download BreakAll by Charles Alan Butler at

http://www.cadforum.cz/cadforum_en/download.asp?fileID=682

and you should be able to break an ellipse even on just one point. Create a line intersecting the starting point then issue BreakAll command. Then you can divide.


Edit: Since breaking a closed object at 1 point is impossible, I did an investigation and found out that breaks made by BreakAll on circles and ellipse objects have 0.00001 gap.