Hi. I'm looking for a way to obtain the gradient of my 3d FE solution at a specified point or points. I imagine this entails two parts, neither of which I know how to do:
1. Figure out which element a point lies inside 2. Determine the gradient of the basis functions inside that element. For the first part, if there is a way to do this already in the code, how do you go about it? If there isn't a way to do this already in the code, I think I could generate a way to do this from the coordinates of the nodes. How do I obtain these within a program? For the second part, once I know which element the point lies inside I need to calculate the gradient at that point. I was trying to figure out how to do this based on how dphi is calculated, but I cannot find where that is actually done in the code. I can find its declaration in fe_base.h, but not where it is calculated. Thanks for your help, Brent ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
