drawing line from a point between 2 objects

[luke83]

Hello, i find myself deviding alot of angles with lines and i was wondering if there was a faster way? Currently i measure the angle, workout half of it than adjust then i angle to suit where the Zero direction is for angle and draw my line.

 

What im hoping for is something along these lines

Draw line ,pick point, enter distance,[tab key] when its asking for the angle required i want to say from the current point midway between this line and this line.

 

Or

angle at 30degs from this line ( so if that line is already at 70 deg it will add the extra 30 making the angle of my line 100)

 

Anyone know of a function like this???

[lpseifert]

If you're asking how to bisect an angle, Xline has that option

[MikeScott]

If you start-up the line command, find a starting point, type @3

 

This will draw a line that's 3 units long, at 45degrees from zero as viewed in the UCS.. change the 3 to whatever length you want and 45 to whatever angle you want.

 

By default, positive X, (3 o'clock) is 0 degrees, Positive Y, (12 o'clock) is 90, straight across negative X (9 o'clock) is 180, etc.. Autocad doesn't get it's angle info from the last angle you drew or anything, it uses the UCS.

 

I know that's not precisely what you're looking for, but the only way I know to do what you're saying is to draw a line that ends on each of the lines making up the angle, and then drawing a line from the angle intersection to the midpoint of that new line. (then extend/trim the line as needed).

[luke83]

thanks you very much, xline is very very nice, one other question can you mak xline project the line to a set length instead of it extending forever

[kencaz]

(By default, straight left is 0, straight up the page is 90, straight across is 180, etc.. Autocad doesn't get it's angle info from the last angle you drew or anything, it uses the UCS)

 

You mean Positive X (right) 3 o'clock is AutoCAD (0) degree default...

 

KC

[Pablo Ferral]

Darren Young did a great class on using Autocad's built in Geometry calculator for this sort of thing:

http://au.autodesk.com/?nd=class&session_id=5371

(May require free registration)

[eldon]

thanks you very much, xline is very very nice, one other question can you mak xline project the line to a set length instead of it extending forever

 

You can Break and Trim an Xline, and it becomes an ordinary line, then using Lengthen, you can set it at the length you want.

[MikeScott]

You mean Positive X (right) 3 o'clock is AutoCAD (0) degree default...

 

KC

 

lol

yeah, my bad. Thanks for catching that.. I'll edit it to avoid confusion. Can't wait for this rendering to finish so I can check out the Xline command (assuming it's in AutoCAD 2004.. I miss out on all the good stuff )