Snake game developed in Rust using the Amethyst game engine.
The main state in which the game runs. It transitions to GameOver if the snake hits itself or a wall.
Simple state that displays a "Game Over" text for two seconds before restarting the game.
Contains a boolean indicating weather an apple was eaten on this frame. This is used for inter system communication.
Tracks the game state so that systems can inform the state they are running in about wanted changes (i.e. when the snakes hits the wall, this is changed to GameOver so that the SnakeGame state can transition).
As the input given to the snake will be used only when it moves, this stores the last input direction along with a Stopwatch tracking the time since the snake had last moved.
Holds a vector to a sprite renderers, one per sprite, which are then accessed with SnakeSpritesKeys.
Tag that identifies an apple Entity.
A glm::IVec2 (integer 2d vector) that is used to store the entity position within the board. The Transform is calculated from this value.
Tag that identifies which entity is the snake head.
Has an Option<Entity> that points to the next snake piece (it basically acts as a linked list).
Checks if the snake is on the apple and, if so, moves the apple to an empty position and signals that the apple was eaten through the AppleWasEaten resource.
Updates the NextDirection resource whenever an action is pressed.
Each 200ms, it moves the snake towards NextDirection.
Checks that the snake did not hit itself or a wall.
Updates the sprites of each Entity with SnakePartComponent based on the GamePositionComponent relative to the previous and the following Entity with SnakePartComponent.
Updates each Entity Transform component based on the GamePositionComponent.