Rotation Rules
The basic rotation rule of TGM is identical to Sega's Japanese arcade version of Tetris, as most of the rule details of TGM are derived from Sega Tetris. It is unique in that no single center of rotation exists; instead, the J, L, S, T, and Z Tetriminos rotate so that the lowest grid block is always of the same height.
One difference from Sega's Tetris is the existence of rotation compensation, also called "wall kick". This applies a slight nudge to a Tetriminos in some cases where rotating it would bump into a wall. First it will try to move the piece one cell right, and then if that fails, one cell left. If both fail, rotation will not work.
Read more about this topic: Tetris: The Grand Master
Famous quotes containing the words rotation and/or rules:
“The lazy manage to keep up with the earth’s rotation just as well as the industrious.”
—Mason Cooley (b. 1927)
“Rules and particular inferences alike are justified by being brought into agreement with each other. A rule is amended if it yields an inference we are unwilling to accept; an inference is rejected if it violates a rule we are unwilling to amend. The process of justification is the delicate one of making mutual adjustments between rules and accepted inferences; and in the agreement achieved lies the only justification needed for either.”
—Nelson Goodman (b. 1906)