Building a function in which one of its inputs is a variable of type Vh

General Discussion
1

Hi, folks!

Suppose I have:

int n;
real[int] vi;
mesh Th;
fespace Vh(Th, P1);
Vh u;

I’d like to build a function in which one of its inputs is u, i.e., the variable of Vh-type. For example:

func int myfunction(int n, real[int] &vi, mesh &Th, [???] ){
   return 0;
}

The question is: How should I pass u (the Vh-type variable) in [???] ?

1 Like
2

The line: Vh u; defines a real array called u[] that is defined on the fespace Vh. Hence, you can pass u[] just like any other real array, (e.g. vi). Just be sure to include the square brackets so that FreeFEM interprets it as a real array.

3

Thanks for your reply. However, such a strategy does not work in my code. Could you provide a simple example?

4

Define the function like:

func int myfunction(int n, real[int] &vi, mesh &Th, real[int] &u){
   return 0;
}

Then call it like:

int k = myfunction(n,vi,Th, u[]);
1 Like
5

Thank you for your response. Indeed, this is the solution for the case when myfunction is built within the file .edp.

1 Like