Overage _adjustOverageClassII()

in src/h3lib/lib/faceijk.c [851:910]
42 lines of code
12 McCabe index (conditional complexity)

Overage _adjustOverageClassII(FaceIJK* fijk, int res, int pentLeading4,
                              int substrate) {
    Overage overage = NO_OVERAGE;

    CoordIJK* ijk = &fijk->coord;

    // get the maximum dimension value; scale if a substrate grid
    int maxDim = maxDimByCIIres[res];
    if (substrate) maxDim *= 3;

    // check for overage
    if (substrate && ijk->i + ijk->j + ijk->k == maxDim)  // on edge
        overage = FACE_EDGE;
    else if (ijk->i + ijk->j + ijk->k > maxDim)  // overage
    {
        overage = NEW_FACE;

        const FaceOrientIJK* fijkOrient;
        if (ijk->k > 0) {
            if (ijk->j > 0)  // jk "quadrant"
                fijkOrient = &faceNeighbors[fijk->face][JK];
            else  // ik "quadrant"
            {
                fijkOrient = &faceNeighbors[fijk->face][KI];

                // adjust for the pentagonal missing sequence
                if (pentLeading4) {
                    // translate origin to center of pentagon
                    CoordIJK origin;
                    _setIJK(&origin, maxDim, 0, 0);
                    CoordIJK tmp;
                    _ijkSub(ijk, &origin, &tmp);
                    // rotate to adjust for the missing sequence
                    _ijkRotate60cw(&tmp);
                    // translate the origin back to the center of the triangle
                    _ijkAdd(&tmp, &origin, ijk);
                }
            }
        } else  // ij "quadrant"
            fijkOrient = &faceNeighbors[fijk->face][IJ];

        fijk->face = fijkOrient->face;

        // rotate and translate for adjacent face
        for (int i = 0; i < fijkOrient->ccwRot60; i++) _ijkRotate60ccw(ijk);

        CoordIJK transVec = fijkOrient->translate;
        int unitScale = unitScaleByCIIres[res];
        if (substrate) unitScale *= 3;
        _ijkScale(&transVec, unitScale);
        _ijkAdd(ijk, &transVec, ijk);
        _ijkNormalize(ijk);

        // overage points on pentagon boundaries can end up on edges
        if (substrate && ijk->i + ijk->j + ijk->k == maxDim)  // on edge
            overage = FACE_EDGE;
    }

    return overage;
}