Browse Source

Restart on game over

master
Timothy Warren 10 months ago
parent
commit
f57560a144
  1. 36
      src/main.rs

36
src/main.rs

@ -36,6 +36,7 @@ struct Materials {
struct SnakeMoveTimer(Timer);
struct GameOverEvent;
struct GrowthEvent;
#[derive(Default)]
@ -130,6 +131,7 @@ fn spawn_segment(
fn snake_movement(
keyboard_input: Res<Input<KeyCode>>,
snake_timer: ResMut<SnakeMoveTimer>,
mut game_over_events: ResMut<Events<GameOverEvent>>,
mut last_tail_position: ResMut<LastTailPosition>,
segments: ResMut<SnakeSegments>,
mut heads: Query<(Entity, &mut SnakeHead)>,
@ -173,6 +175,21 @@ fn snake_movement(
head_pos.y -= 1;
}
};
// Check if we've hit a wall
if head_pos.x < 0
|| head_pos.y < 0
|| head_pos.x as u32 >= ARENA_WIDTH
|| head_pos.y as u32 >= ARENA_HEIGHT
{
game_over_events.send(GameOverEvent);
}
// Check if we've hit our tail
if segment_positions.contains(&head_pos) {
game_over_events.send(GameOverEvent);
}
segment_positions
.iter()
.zip(segments.0.iter().skip(1))
@ -183,6 +200,23 @@ fn snake_movement(
}
}
fn game_over(
commands: &mut Commands,
mut reader: Local<EventReader<GameOverEvent>>,
game_over_events: Res<Events<GameOverEvent>>,
materials: Res<Materials>,
segments_res: ResMut<SnakeSegments>,
food: Query<Entity, With<Food>>,
segments: Query<Entity, With<SnakeSegment>>,
) {
if reader.iter(&game_over_events).next().is_some() {
for ent in food.iter().chain(segments.iter()) {
commands.despawn(ent);
}
spawn_snake(commands, materials, segments_res);
}
}
fn snake_eating(
commands: &mut Commands,
snake_timer: ResMut<SnakeMoveTimer>,
@ -284,6 +318,7 @@ fn main() {
.add_resource(SnakeSegments::default())
.add_resource(LastTailPosition::default())
.add_event::<GrowthEvent>()
.add_event::<GameOverEvent>()
.add_startup_system(setup.system())
.add_startup_stage("game_setup", SystemStage::single(spawn_snake.system()))
.add_system(snake_movement.system())
@ -293,6 +328,7 @@ fn main() {
.add_system(snake_timer.system())
.add_system(snake_eating.system())
.add_system(snake_growth.system())
.add_system(game_over.system())
.add_plugins(DefaultPlugins)
.run();
}

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