docs: public static void generateCrosshairs(TFloatList positions, TIntList indices, float length) {
          /*
           *   \ |
           *    \|
           * ----O-----
           *     |\
           *     | \
           */
          length /= 2;
          // Add the x axis line
          addAll(positions, -length, 0, 0, length, 0, 0);
          addAll(indices, 0, 1);
          // Add the y axis line
          addAll(positions, 0, -length, 0, 0, length, 0);
          addAll(indices, 2, 3);
          // Add the z axis line
          addAll(positions, 0, 0, -length, 0, 0, length);
          addAll(indices, 4, 5);
      }