Method getShape2Idx

app/src/main/java/cs/sq12phase/Shape.java:24–26

(int shp)

    int parity;

    static int getShape2Idx(int shp) {
        return Arrays.binarySearch(ShapeIdx, shp & 0xffffff) <<1 | shp>>24;
    }

    private int getIdx() {
        return Arrays.binarySearch(ShapeIdx, top << 12 | bottom) << 1 | parity;