Explanation:
The two cmath lines above this
one calculate the distance that the enemy is ahead of Torque (~v1)
and to the side of Torque (~v2). If
it happens that the enemy is two places directly in front of Torque, and
there is an obstacle in the space directly in front of Torque, then the
enemy can be fragged, so Torque
jumps to a routine to do this.