Structured Adaptive Mesh Refinement - example code and question

[thomasgillis]

Dear Hypre team,

I am trying to understand the SStruct interface and especially the way to reproduce the example is section 3.3 "Structured Adaptive Mesh Refinement". Do you have a code to reproduces the example?

From a more conceptual point of view: I need 2 parts, one for each mesh level and both part will have an associated stencil (let's say the standard 5-point).

However, the following is not clear to me: the function GraphAddEntries need to be called as for part 0 and part 1. For example the calls in part 1 would look like (with var = 0):

// point {2,3}
HYPRE_SStructGraphAddEntries(graph, /* part 1 information */ 1, {6,6}, 0,
                                    /* part 0 information */ 0,  {2,3}, 0);
// point {3,2}
HYPRE_SStructGraphAddEntries(graph, /* part 1 information */ 1, {6,6}, 0,
                                    /* part 0 information */ 0,  {3,2}, 0);

But then I need to fill the matrix for the equation in {6,6}, let's say using HYPRE_SStructMatrixSetValues. How do I set a value in my matrix? What value of entries should I use in order to be able to access the graph entries I have just added?

Thanks for your help and your time!