RevitCity.com Logo

Home  |  Forums  |  Downloads  |  Gallery  |  News & Articles  |  Resources  |  Jobs  |  FAQ  |  SearchSearch  |  Join  |  LoginLogin

Welcome !

40 Users Online (39 Members): Show Users Online - Most ever was 626 - Mon, Jan 12, 2015 at 2:00:17 PM

 

Forums

Forums >> Revit Structure >> Technical Support >> Help with Geometry

Search this ThreadSearch this Thread | Page 1 of 1 |

Sat, Dec 19, 2009 at 7:39:26 PM | Help with Geometry

#1

emgeeo


active

Joined: Wed, Mar 12, 2008
322 Posts
3.5 Stars: 7 Votes


I need a Geometry 101 lesson.  I am trying to determine the lengths of three lines within a circle.  I have all the information regarding the radius, the endpoing locations within the circle, and the angles of each line.

 

What I don't have is a formula that links this information together and provides me with a line length.  Can anyone help me with this?

 

How can I find this length?  See attached image.

 

Thank you in advance!



Edited on: Sat, Dec 19, 2009 at 11:14:22 PM

Attached Images

70397_Line_Lengths.bmp

This user is offline

 

Sat, Dec 19, 2009 at 7:48:26 PM | Help with Geometry

#2

Mr Spot


site moderator|||
Mr Spot Avatar

Joined: Mon, Jan 12, 2004
2889 Posts
4.5 Stars: 93 Votes


Your image doesn't highlight what information you know and what you want to find out...??

-----------------------------------

Regards,

Chris.

Co-Founder | BIM Consultant | Software Designer  CryingB. Arch)

Xrev Revit API Addins | Revit Rants

This user is offline

View Website

Sat, Dec 19, 2009 at 11:21:35 PM | Help with Geometry

#3

emgeeo


active

Joined: Wed, Mar 12, 2008
322 Posts
3.5 Stars: 7 Votes


Yes, I understand it doesn't match verbatim.  I should clarify.

 

Three of the five lines are unique.  Two of them are at 90°, two of them are at 22.5°, and one of them is at 45°.  Therefore, I have three unique line lengths I am looking for.

 

What I know.

The five lines are not radiating from the center of the circle.  They are radiating from a point 45° from the center of the circle.  Let us assume it is 4'-0" in each direction.

 

The radius is 20'-0"

 

The angles are as mentioned above.  But, to be technical, they are located at 0°, 22.5°, 45°, 67.5°, and 90°.

 

That is what I know.

 

What I don't know, and what I want to find is:  The length of each line (really, I only need to calculate the length of each unique line, thus 3) from the point they radiate to the point at which they terminate (at the 2-'-0" radius).

 

Edited on: Sat, Dec 19, 2009 at 11:22:13 PM

Edited on: Sat, Dec 19, 2009 at 11:23:24 PM

This user is offline

 

Sat, Dec 19, 2009 at 11:24:35 PM | Help with Geometry

#4

emgeeo


active

Joined: Wed, Mar 12, 2008
322 Posts
3.5 Stars: 7 Votes


By the way.  I am trying to build a complex nested family which I hope will be fully parametric.  These line lengths are the missing link.

 

Thanks,

Matt


This user is offline

 

Sun, Dec 20, 2009 at 12:48:13 AM | Help with Geometry

#5

Mr Spot


site moderator|||
Mr Spot Avatar

Joined: Mon, Jan 12, 2004
2889 Posts
4.5 Stars: 93 Votes


You've probably already seen this, but it may help.

 

http://mathforum.org/dr.math/faq/formulas/faq.circle.html

 

And this which is more in line with what you are trying to achieve:  http://www.gamedev.net/community/forums/topic.asp?topic_id=554266

 

And this one... Which does something very similar but more complex...

 

http://www.physicsforums.com/showthread.php?t=185755&page=2

 

 

Edited on: Sun, Dec 20, 2009 at 1:00:54 AM

Edited on: Sun, Dec 20, 2009 at 1:23:54 AM

-----------------------------------

Regards,

Chris.

Co-Founder | BIM Consultant | Software Designer  CryingB. Arch)

Xrev Revit API Addins | Revit Rants

This user is offline

View Website

Sun, Dec 20, 2009 at 5:19:54 PM | Help with Geometry

#6

emgeeo


active

Joined: Wed, Mar 12, 2008
322 Posts
3.5 Stars: 7 Votes


The second link looks most helpful.  Thank you very much sir.

This user is offline

 

Search this ThreadSearch this Thread | Page 1 of 1 |



Similar Threads

Thread/Thread Starter

Forum

Last Post

Replies

geometry memory size

Revit Building >> Technical Support

Fri, Mar 27, 2009 at 11:28:05 AM

1

Cut / Join - Geometry (api)

Workflow & Implementation >> API & Third Party Apps

Tue, Jul 29, 2008 at 2:07:19 AM

0

VOID FORM says there is no geometry to cut.... [ 1 2 ]

Revit Building >> Technical Support

Wed, Dec 17, 2008 at 12:52:27 PM

19

Diagonal End of Wall - Void + Cut Geometry not working

Revit Building >> Technical Support

Fri, Aug 30, 2013 at 3:25:08 AM

8

Rotating Symbol geometry without rotating leabel

Revit Building >> Technical Support

Wed, May 6, 2009 at 8:33:58 AM

6

Site Stats

Members:

1977347

Objects:

22860

Forum Posts:

152166

Job Listings:

3

Sponsored Ads

Home | Forums | Downloads | Gallery | News & Articles | Resources | Jobs | Search | Advertise | About RevitCity.com | Link To Us | Site Map | Member List | Firm List | Contact Us

Copyright 2003-2010 Pierced Media LC, a design company. All Rights Reserved.

Page generation time: 0.2334

Login

User Name:

Password:

Remember Me  

Forgot Password?

Search Forums

Advanced Search

Search Forums

Advanced Search


Clear Highlights


Clear Highlights