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Draft: AMI - added caching of weights and addressing

Andrew Heather requested to merge ami-cache-weights-addressing into develop

Applicable to rotational cases:

  • stores AMI weights and addressing on the first revolution
  • cached evaluations performed on subsequent revolutions to reduce computational costs

Cached values are stored in angular bins, specified using the [optional] cacheSize entry when defining the patch in the polyMesh/boundary file, e.g.

AMI1
{
    type            cyclicAMI;
    AMIMethod       faceAreaWeightAMI;
    neighbourPatch  AMI2;

    cacheSize       360; // New entry
    transform       rotational;
    rotationAxis    (0 0 1);
    rotationCentre  (0 0 0);
}

Note that the transform must also be set to rotational; the additional rotationAxis and rotationCentre entries are used to construct a local AMI co-ordinate system to determine the rotation angle as the mesh moves.

360 bins are created in the example above, equating to a uniform bin width of 1 degree.

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