Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.
First time visiting? Here are some places to start:- Looking for a certain topic? Check out the categories filter or use Search (upper right).
- Need support? Ask a question to our Community Support category.
- Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
- Be respectful, on topic and if you see a problem, Flag it.
If you would like to contact our Community Manager personally, feel free to send a private message or an email.
Options
How can I create a curve defined by a function or by coordinates?
Kitepower_main2015
Member Posts: 4 PRO
I want to create a curve starting from a given function.
For example I want to create circle using the function x^2+y^2=1
Or, I want to create a sketch in which a curve goes through a set of coordinates. For example I want to create a NACA airfoil profile given the coordinates present in this website:
http://airfoiltools.com/airfoil/details?airfoil=naca4418-il
Thank you very much for your help.
For example I want to create circle using the function x^2+y^2=1
Or, I want to create a sketch in which a curve goes through a set of coordinates. For example I want to create a NACA airfoil profile given the coordinates present in this website:
http://airfoiltools.com/airfoil/details?airfoil=naca4418-il
Thank you very much for your help.
0
Best Answers
-
Options
bradley_sauln
Moderator, Onshape Employees, Developers Posts: 373 
Hey @michele_portioli861, I recommend that you start at our custom airfoil profile feature that uses NACA profiles: https://cad.onshape.com/documents/4bf18c75321ea2c8c2ea770d/w/978aece63f59e09169309756/e/b319e7a87bba701e3e02a0fa
You can take a look at the feature (even add it to your toolbar) and even see the code used to create it to work on one for your own specific use case.
More info on using featurescript can be found here: https://www.onshape.com/featurescript
5 -
Options
konstantin_shiriazdanov
Member Posts: 1,221 ✭✭✭✭✭
don't think you can currently create curves corresponding to implicit equations like f(x,y)=0. though curves defined by equations like y=f(x) or (x,y) = f(t) are possible with the help of Parametric curve FS by @mahir
https://cad.onshape.com/documents/578ff8b3e4b0e65410fcfda3
if you are interested in kinematic curves there is a Curve generator custom feature for creating trajectories of points of planar mechanisms
the spline through a number of points is possible as well with the help of custom features, but if to speak particularly about airfoils there is Foils custom feature with a number of builtin profiles (don't know if it is the link to the original document)
https://cad.onshape.com/documents/972dc31f395640d97dd6edca/w/8125816b48d1d07ebf0af701/e/b0dd208496a64d28d34778f4
5
Answers
You can take a look at the feature (even add it to your toolbar) and even see the code used to create it to work on one for your own specific use case.
More info on using featurescript can be found here: https://www.onshape.com/featurescript
Twitter: @bradleysauln
https://cad.onshape.com/documents/578ff8b3e4b0e65410fcfda3
if you are interested in kinematic curves there is a Curve generator custom feature for creating trajectories of points of planar mechanisms
the spline through a number of points is possible as well with the help of custom features, but if to speak particularly about airfoils there is Foils custom feature with a number of builtin profiles (don't know if it is the link to the original document)
https://cad.onshape.com/documents/972dc31f395640d97dd6edca/w/8125816b48d1d07ebf0af701/e/b0dd208496a64d28d34778f4
Thanks for your help!