### Author Topic: calculate an area with a parallel line  (Read 4326 times)

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#### TopoWAR

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• Posts: 133
##### calculate an area with a parallel line
« on: December 15, 2011, 04:07:11 PM »
Hello to all! Anyone know how to calculate from a given area lisp a parallel line, I show an example, thanks
Thanks for help

#### ronjonp

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##### Re: calculate an area with a parallel line
« Reply #1 on: December 15, 2011, 04:30:02 PM »

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#### TopoWAR

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• Posts: 133
##### Re: calculate an area with a parallel line
« Reply #2 on: December 15, 2011, 04:39:35 PM »
ronjonp , thanks for replying, but not what I am concerned, I need to calculate an area based on a parallel line, let's see who help me, thanks
Thanks for help

#### ronjonp

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##### Re: calculate an area with a parallel line
« Reply #3 on: December 15, 2011, 04:52:18 PM »
Can't you select the two parallel lines, sort the endpoints, and use AT:AreaFromPoints to get the area?

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Custom Build PC

#### TopoWAR

• Newt
• Posts: 133
##### Re: calculate an area with a parallel line
« Reply #4 on: December 15, 2011, 05:05:33 PM »
ronjonp , see this sample video:
« Last Edit: December 15, 2011, 05:20:36 PM by TopoWAR »
Thanks for help

#### CAB

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##### Re: calculate an area with a parallel line
« Reply #5 on: December 15, 2011, 07:42:05 PM »
I don't understand how you are creating the polygon.
But that is what you want the area of?
I've reached the age where the happy hour is a nap. (°¿°)
Windows 10 core i7 4790k 4Ghz 32GB GTX 970

#### Lee Mac

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##### Re: calculate an area with a parallel line
« Reply #6 on: December 15, 2011, 07:49:07 PM »
Or are you trying to determine the position of the parallel line based on a set area?

#### TopoWAR

• Newt
• Posts: 133
##### Re: calculate an area with a parallel line
« Reply #7 on: December 15, 2011, 07:58:45 PM »
Lee Mac , correct master

example:
1 - (getpoint) point 1 = p1
2 - (getpoint) point 2 = p2
3 - (getpoint) first address = p3
4 - (getpoint) second address p4
5 - Enter the area to calculate: eg 15000
6 - calculate 2 new items to the area indicated, using the pt1 to pt2 parallel

climb another clear example

« Last Edit: December 15, 2011, 08:06:34 PM by TopoWAR »
Thanks for help

• Bull Frog
• Posts: 320
##### Re: calculate an area with a parallel line
« Reply #8 on: December 16, 2011, 05:39:09 AM »
very handy if this could be done, I always resort to offsetting a little at a time.

#### CAB

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##### Re: calculate an area with a parallel line
« Reply #9 on: December 16, 2011, 08:12:04 AM »
Very perceptive of you Lee.

Given the end points of two lines and the area desired it should not be too difficult to do.
I think I remember a similar thread.

No time this morning but I'm sure someone will offer a solution.

I've reached the age where the happy hour is a nap. (°¿°)
Windows 10 core i7 4790k 4Ghz 32GB GTX 970

• Mosquito
• Posts: 1
##### Re: calculate an area with a parallel line
« Reply #10 on: December 16, 2011, 12:13:45 PM »
Hi TopoWAR,
maybe this one is helpful for you. It`s not my work, I found it on the web, but don`t remember where....

#### TopoWAR

• Newt
• Posts: 133
##### Re: calculate an area with a parallel line
« Reply #11 on: December 16, 2011, 12:50:36 PM »
adam_s , more than excellent, thanks for help
Thanks for help

#### Lee Mac

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• Posts: 12397
• London, England
##### Re: calculate an area with a parallel line
« Reply #12 on: December 16, 2011, 01:23:29 PM »
Here is my quick derivation for those who want to code it:

[ Excuse my dimensioning | programmer not draftsman ]

#### efernal

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• Posts: 198
##### Re: calculate an area with a parallel line
« Reply #13 on: December 16, 2011, 02:46:44 PM »
e.fernal

#### efernal

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• Posts: 198
##### Re: calculate an area with a parallel line
« Reply #14 on: December 18, 2011, 08:55:56 AM »
done...
e.fernal