AutoCAD 2007/2008/2009

## AutoCAD 2007/2008/2009

Member
Posts: 4
Registered: ‎10-24-2010
Message 1 of 5 (454 Views)

# How to draw shapes using equations?

454 Views, 4 Replies
01-23-2013 07:54 PM

Hello,

I want to draw an exponential taper 2D structure having a particulare taper equation.

How can I draw such shapes?

Thank you for your help.

Regards,

Nirmal.

*Expert Elite*
Posts: 26,352
Registered: ‎04-20-2006
Message 2 of 5 (433 Views)

# Re: How to draw shapes using equations?

01-29-2013 09:07 AM in reply to: nirmalp

Calculate a few points and then place a spline between the points.

Calculate twice as many points and create a new spline.

Is there a significant (manufacturable, measurable (using standard measuring tools - not AutoCAD) difference between the two curves?

If not then you might try again with half as many points as the first curve.

You could find out that you need to calculate far fewer points than you might think.

Please mark this response as "Accept as Solution" if it answers your question.
-----------------------------------------------------------------------------------------
Autodesk Inventor 2014 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional
Inventor Professional 2015 64-bit
http://www.autodesk.com/edcommunity
http://home.pct.edu/~jmather/content/DSG322/inventor_surface_tutorials.htm
Member
Posts: 4
Registered: ‎10-24-2010
Message 3 of 5 (428 Views)

# Re: How to draw shapes using equations?

01-29-2013 10:15 AM in reply to: JDMather

Hello,

Thank you for your reply.

I am designing the optical waveguide & it design changes might affect my final feild response after passing through all the components.

I have all the co-ordinates/points(around 7000) for the curve:

Can I plot all the points using some function line pline or spline?

If yes, can you elaborate the way to enter the co-ordinates?

Somebody suggested me to copy paste x & y co-ordinates. but I am not able to do that.

Thank you.

Regards,

Nirmal.

*Expert Elite*
Posts: 6,226
Registered: ‎09-16-2009
Message 4 of 5 (420 Views)

# Re: How to draw shapes using equations?

01-30-2013 06:13 AM in reply to: nirmalp

Get 30 free trial C3D and bring in the points if they are that many.

*Expert Elite*
Posts: 26,352
Registered: ‎04-20-2006
Message 5 of 5 (412 Views)

# Re: How to draw shapes using equations?

01-30-2013 08:43 AM in reply to: nirmalp

nirmalp wrote:

Hello,

I am designing the optical waveguide & it design changes might affect my final feild response after passing through all the components.

I have all the co-ordinates/points(around 7000) for the curve:

Nirmal.

I think something like Autodesk Inventor would be a better tool for this application.
I'm sure there is probably a list out there that willl draw a spline from a list of points, but -

where did these points come from?  Caculated? Scanned point cloud?

If calculated I'll wager that just as good results could be obtained from 70 points and maybe far far fewer.

In Inventor you can enter points from Excel

or

enter Equations directly.

The advantage to the second method is if you need to tweek the numbers - the model will automatically update.

If you must use AutoCAD this might help http://www.google.com/#hl=en&tbo=d&output=search&sclient=psy-ab&q=autocad+spline+from+excel&oq=autoc...

Please mark this response as "Accept as Solution" if it answers your question.
-----------------------------------------------------------------------------------------
Autodesk Inventor 2014 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional
Inventor Professional 2015 64-bit
http://www.autodesk.com/edcommunity
http://home.pct.edu/~jmather/content/DSG322/inventor_surface_tutorials.htm

### You are not logged in.

Log into access your profile, ask and answer questions, share ideas and more. Haven't signed up yet? Register

Announcements

Come hangout with Autodesk Support Specialist and AutoCAD guru Volker Cocco, to learn about Precision Drafting: Object Snaps and Object Tracking on July 31 @ 11:00 AM PST.

Click here for registration information!

### Need installation help?

Start with some of our most frequented solutions to get help installing your software.

### Maintenance Subscription Resources

Upgrading to a 2015 product? Make sure to check these out 1st!

Twitter

Facebook

Blogs

Pinterest

Youtube