Merge "Delete dead code function SpotShadow::makeClockwise"

    static Vector2 centroid2d(const Vector2* poly, int polyLength);

    static bool isClockwise(const Vector2* polygon, int len);

    static Vector2 calculateNormal(const Vector2& p1, const Vector2& p2);

    static int getExtraVertexNumber(const Vector2& vector1, const Vector2& vector2,

    return c;

}

/**

 * Make the polygon turn clockwise.

 *

 * @param polygon the polygon as a Vector2 array.

 * @param len the number of points of the polygon

 */

void SpotShadow::makeClockwise(Vector2* polygon, int len) {

    if (polygon == nullptr  || len == 0) {

        return;

    }

    if (!ShadowTessellator::isClockwise(polygon, len)) {

        reverse(polygon, len);

    }

}

/**

 * Reverse the polygon

 *

    static void quicksortX(Vector2* points, int low, int high);

    static bool testPointInsidePolygon(const Vector2 testPoint, const Vector2* poly, int len);

    static void makeClockwise(Vector2* polygon, int len);

    static void reverse(Vector2* polygon, int len);

    static void generateTriangleStrip(bool isCasterOpaque, float shadowStrengthScale,