H. G. Muller wrote on Thu, Nov 20, 2008 11:25 AM EST:
It seems your use of the word zigzag is at odds with the definition in the dictionary, quoted below. The latter clearly specifies the need for multiple angles in the trajectory, while your pieces have only one:
zig⋅zag
noun, adjective, adverb, verb, -zagged, -zag⋅ging.
–noun
1. a line, course, or progression characterized by sharp turns first to one side and then to the other.
2. one of a series of such turns, as in a line or path.
–adjective
3. proceeding or formed in a zigzag: zigzag stitches.
–adverb
4. with frequent sharp turns from side to side; in a zigzag manner: The child ran zigzag along the beach.
–verb (used with object)
5. to make (something) zigzag, as in form or course; move or maneuver (something) in a zigzag direction: They zigzagged their course to confuse the enemy.
–verb (used without object)
6. to proceed in a zigzag line or course.