public void touch(Entity self, Entity other, Plane plane, Surface surf) {
if ((other.flags & (Constants.FL_FLY | Constants.FL_SWIM)) != 0) return;
if ((other.svflags & Constants.SVF_DEADMONSTER) != 0) return;
if (0 == (other.svflags & Constants.SVF_MONSTER)) return;
// set XY even if not on ground, so the jump will clear lips
other.velocity[0] = self.movedir[0] * self.speed;
other.velocity[1] = self.movedir[1] * self.speed;
if (other.groundentity != null) return;
other.groundentity = null;
other.velocity[2] = self.movedir[2];
}
