A Quick Overview

Documentation that will appear on the main page

Mesh Metadata

The metadata for a tree based mesh is stored in a Domain object. The Domain object stores a collection of PatchInfo objects. The PatchInfo contains the metadata associated with a specific patch, such as information about neighboring patches, the number of cells in a patch, processor-local index, etc.

Vectors

ThunderEgg expects data to be laid out in a series of logically Cartesian patches (i.e. patch-level data is in a strided layout). A Vector object represents the data for an entire Domain. A Vector contains data for each cell of the patch, and each cell can have multiple components. Users can retrieve a PatchView for each patch.

An example of looping over a 2D Vector's data:

Domain<2> domain;
Vector<2> x;
for(int i = 0; i < domain.getNumLocalPatches(); i++){
    PatchInfo<2> patch_info = domain.getPatchInfoVector()[i];
    int nx = patch_info.ns[0];
    int ny = patch_info.ns[1];

    PatchView<double, 2> view = x.getPatchView(i);
    for(int c = 0; c < x.getNumComponents(); c++){
        for(int y = 0; c < ny; y++){
            for(int x = 0; x < nx; x++){
                view(x,y,c) = 1.23;
            }
        }
    }
}