Hello Egon, If i don't rotate the tunnel model and bezier curve , the tunnel model position is ok (see attached picture), but when I rotate the model tunnel.rotateX((float)Math.PI); and mirror the bezier curve point by x-coordinate, the position is not ok, I think maybe mirror the bezier curve point is wrong , I don't know how to rotate point , I use code like this:
mywaypoint = new SimpleVector((float)curvepoint[k++],(float)curvepoint[k++], -1 * (float)curvepoint[k++]);
please help me to check where is wrong , Thanks !