talglobus / snake Goto Github PK

Currently, the way the snake grid is rendered only affects squares that fall into one of three categories:

1. Part of the snake body
2. Food
3. The single newly-empty square that was most recently food
4. The single newly-empty square that was most recently previously part of the snake body

This issue concerns category (4), the square that the snake just moved off of, which must be rendered as an empty square after each movement of the snake. At the moment, this square is simply represented with a dummy coordinate-pair at the end of the snake body. However, this is semantically problematic as this square is certainly not a part of the snake.

This square should be represented as a third property of the Snake struct, as additional to pos and direction. This change would make the representation of the snake more semantically correct, and also prevent any number of bugs related to this unusual representation of the square most recently vacated by the snake. For example, a recently predicted and proven bug is that if the snake runs into this square, which is not a part of the snake body, the game will show a loss as if it were.