Function symmetricalTrichotomy

MyGUIEngine/src/msdfgen/core/edge-coloring.cpp:19–21

* For each position < n, this function will return -1, 0, or 1, * depending on whether the position is closer to the beginning, middle, or end, respectively. * It is guaranteed that the output will be balanced in that the total for positions 0 through n-1 will be zero. */

 * It is guaranteed that the output will be balanced in that the total for positions 0 through n-1 will be zero.
 */
static int symmetricalTrichotomy(int position, int n) {
    return int(3+2.875*position/(n-1)-1.4375+.5)-3;
}

static bool isCorner(const Vector2 &aDir, const Vector2 &bDir, double crossThreshold) {
    return dotProduct(aDir, bDir) <= 0 || fabs(crossProduct(aDir, bDir)) > crossThreshold;