add lock reset for infinity

.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+  "cSpell.words": [
+    "Mino",
+    "PLAYFIELD",
+    "Renderable",
+    "Tickable",
+    "tetromino"
+  ]
+}

src/game.rs

@@ -19,8 +19,8 @@ pub struct Game {
     playfield: PlayField,
     rotation_system: SRS,
     level: u8,
-    points: u32,
+    score: u32,
-    pub tick: u64,
+    tick: u64,
     next_gravity_tick: u64,
     next_lock_tick: u64,
     next_spawn_tick: u64,
@@ -29,7 +29,7 @@ pub struct Game {
 
 impl fmt::Debug for Game {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        writeln!(f, "level: {}, points: {}", self.level, self.points)?;
+        writeln!(f, "level: {}, points: {}", self.level, self.score)?;
         writeln!(f, "tick: {}", self.tick)?;
         write!(f, "{:?}", self.playfield)
     }
@@ -41,7 +41,7 @@ impl Default for Game {
             playfield: PlayField::new(),
             rotation_system: SRS::default(),
             level: 1,
-            points: 0,
+            score: 0,
             tick: 0,
             next_gravity_tick: 60,
             next_lock_tick: 0,
@@ -65,17 +65,7 @@ impl Tickable for Game {
         match self.tick {
             t if t == self.next_spawn_tick => self.spawn_tetromino(),
             t if t == self.next_lock_tick => {
-                // It's possible that the player moved the piece in the meantime.
+                self.try_lock_tetromino();
-                if !self.playfield.can_active_piece_move_down() {
-                    let positions = self.playfield.lock_active_piece();
-                    self.is_game_over =
-                        self.is_game_over || positions.iter().all(|Position { x: _, y }| *y < 20);
-                    if self.clear_lines() {
-                        self.next_spawn_tick = self.tick + LINE_CLEAR_DELAY;
-                    } else {
-                        self.spawn_tetromino();
-                    }
-                }
             }
             t if t == self.next_gravity_tick => {
                 self.playfield.tick_gravity();
@@ -95,7 +85,7 @@ impl Game {
     }
 
     fn update_gravity_tick(&mut self) {
-        self.next_gravity_tick = self.tick + TICKS_PER_SECOND as u64;
+        self.next_gravity_tick = (-1 as i64) as u64; //self.tick + TICKS_PER_SECOND as u64;
     }
 
     fn update_lock_tick(&mut self) {
@@ -113,6 +103,23 @@ impl Game {
         // todo: award points based on how lines were cleared
         return false;
     }
+
+    fn try_lock_tetromino(&mut self) -> bool {
+        // It's possible that the player moved the piece in the meantime.
+        if !self.playfield.can_active_piece_move_down() {
+            let positions = self.playfield.lock_active_piece();
+            self.is_game_over =
+                self.is_game_over || positions.iter().all(|Position { x: _, y }| *y < 20);
+            if self.clear_lines() {
+                self.next_spawn_tick = self.tick + LINE_CLEAR_DELAY;
+            } else {
+                self.spawn_tetromino();
+            }
+            true
+        } else {
+            false
+        }
+    }
 }
 
 impl Renderable for Game {
@@ -121,9 +128,8 @@ impl Renderable for Game {
     }
 }
 
-trait Controllable {
+pub trait Controllable {
     fn move_left(&mut self);
-    fn move_up(&mut self);
     fn move_right(&mut self);
     fn move_down(&mut self);
     fn rotate_left(&mut self);
@@ -133,13 +139,55 @@ trait Controllable {
 }
 
 impl Controllable for Game {
-    fn move_left(&mut self) {}
+    fn move_left(&mut self) {
-    fn move_up(&mut self) {}
+        self.playfield.move_offset(-1, 0);
-    fn move_right(&mut self) {}
+        self.update_lock_tick();
-    fn move_down(&mut self) {}
+    }
-    fn rotate_left(&mut self) {}
+    fn move_right(&mut self) {
-    fn rotate_right(&mut self) {}
+        self.playfield.move_offset(1, 0);
-    fn hard_drop(&mut self) {}
+        self.update_lock_tick();
+    }
+    fn move_down(&mut self) {
+        if self.playfield.move_offset(0, 1) {
+            self.score += 1;
+            self.update_gravity_tick();
+            self.update_lock_tick();
+        }
+    }
+    fn rotate_left(&mut self) {
+        match self.rotation_system.rotate_left(&self.playfield) {
+            Ok(Position { x, y }) => {
+                let mut active_piece = self.playfield.active_piece.unwrap().clone();
+                active_piece.position = active_piece.position.offset(x, y);
+                active_piece.rotate_left();
+                self.playfield.active_piece = Some(active_piece);
+                self.update_lock_tick();
+            }
+            Err(_) => (),
+        }
+    }
+    fn rotate_right(&mut self) {
+        match self.rotation_system.rotate_right(&self.playfield) {
+            Ok(Position { x, y }) => {
+                let mut active_piece = self.playfield.active_piece.unwrap().clone();
+                active_piece.position = active_piece.position.offset(x, y);
+                active_piece.rotate_right();
+                self.playfield.active_piece = Some(active_piece);
+                self.update_lock_tick();
+            }
+            Err(_) => (),
+        }
+    }
+    fn hard_drop(&mut self) {
+        while self.playfield.can_active_piece_move_down() {
+            self.score += 2;
+            self.playfield.move_offset(0, 1);
+        }
+
+        if !self.try_lock_tetromino() {
+            println!("couldn't lock tetromino despite hard dropping!");
+        }
+    }
 
     fn hold(&mut self) {
         // if self.can_swap_hold {

src/graphics.rs

@@ -1,6 +1,8 @@
 use sdl2::pixels::Color;
 
 pub const CELL_SIZE: u32 = 32;
+pub const BORDER_RADIUS: u32 = 1;
+
 pub static COLOR_BACKGROUND: Color = Color::RGB(60, 60, 60);
 pub static COLOR_CYAN: Color = Color::RGB(0, 255, 255);
 pub static COLOR_YELLOW: Color = Color::RGB(255, 255, 0);

src/main.rs

@@ -1,4 +1,4 @@
-use game::{Game, Tickable};
+use game::{Controllable, Game, Tickable};
 use graphics::COLOR_BACKGROUND;
 use sdl2::event::Event;
 use sdl2::keyboard::Keycode;
@@ -30,7 +30,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut canvas = window.into_canvas().build()?;
     let mut event_pump = sdl_context.event_pump()?;
     let mut game = Game::default();
-    let mut interval = interval(Duration::from_millis(60 / TICKS_PER_SECOND as u64));
+    let mut interval = interval(Duration::from_millis(1000 / TICKS_PER_SECOND as u64));
 
     'running: while !game.is_game_over() {
         for event in event_pump.poll_iter() {
@@ -40,6 +40,40 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                     keycode: Some(Keycode::Escape),
                     ..
                 } => break 'running,
+                Event::KeyDown {
+                    keycode: Some(Keycode::Left),
+                    ..
+                } => {
+                    game.move_left();
+                }
+                Event::KeyDown {
+                    keycode: Some(Keycode::Right),
+                    ..
+                } => game.move_right(),
+                Event::KeyDown {
+                    keycode: Some(Keycode::Down),
+                    ..
+                } => game.move_down(),
+                Event::KeyDown {
+                    keycode: Some(Keycode::Z),
+                    ..
+                } => game.rotate_left(),
+                Event::KeyDown {
+                    keycode: Some(Keycode::X),
+                    ..
+                } => game.rotate_right(),
+                Event::KeyDown {
+                    keycode: Some(Keycode::Space),
+                    ..
+                }
+                | Event::KeyDown {
+                    keycode: Some(Keycode::Up),
+                    ..
+                } => game.hard_drop(),
+                Event::KeyDown {
+                    keycode: Some(Keycode::LShift),
+                    ..
+                } => game.hold(),
                 _ => {}
             }
         }
@@ -51,8 +85,6 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         interval.tick().await;
     }
 
-    println!("Game over! Final game state:");
     dbg!(game);
-
     Ok(())
 }

src/playfield.rs

@@ -1,7 +1,6 @@
-use crate::graphics::{CELL_SIZE, COLOR_BACKGROUND};
+use crate::graphics::{BORDER_RADIUS, CELL_SIZE, COLOR_BACKGROUND};
 use crate::random::RandomSystem;
-use crate::tetromino::Position;
+use crate::tetromino::{MinoColor, Position, Tetromino, TetrominoType};
-use crate::tetromino::{MinoColor, Tetromino, TetrominoType};
 use crate::Renderable;
 use sdl2::{pixels::Color, rect::Rect, render::Canvas, video::Window};
 use std::collections::VecDeque;
@@ -22,7 +21,7 @@ pub struct PlayField {
     can_swap_hold: bool,
     hold_piece: Option<TetrominoType>,
     field: Matrix,
-    active_piece: Option<Tetromino>,
+    pub active_piece: Option<Tetromino>,
     bag: RandomSystem,
     next_pieces: VecDeque<TetrominoType>,
     last_movement: Movement,
@@ -53,7 +52,7 @@ impl fmt::Debug for PlayField {
                 ('a' as usize - PLAYFIELD_HEIGHT + y) as u8 as char
             )?;
             for x in 0..PLAYFIELD_WIDTH {
-                if occupied_spaces.contains(&Position::new(x, y)) {
+                if occupied_spaces.contains(&Position::new(x as isize, y as isize)) {
                     write!(f, "#")?;
                 } else {
                     match self.field[y][x] {
@@ -80,10 +79,10 @@ impl fmt::Debug for PlayField {
 impl PlayField {
     pub fn new() -> Self {
         let mut bag = RandomSystem::new();
-        let active_piece = Tetromino::from(bag.get_tetrino());
+        let active_piece = Tetromino::from(bag.get_tetromino());
         let mut next_pieces = VecDeque::with_capacity(3);
         for _ in 0..next_pieces.capacity() {
-            next_pieces.push_back(bag.get_tetrino());
+            next_pieces.push_back(bag.get_tetromino());
         }
 
         PlayField {
@@ -97,13 +96,43 @@ impl PlayField {
         }
     }
 
+    pub fn move_offset(&mut self, x: isize, y: isize) -> bool {
+        if self.can_move_offset(x, y) {
+            match self.active_piece {
+                Some(mut piece) => {
+                    piece.position.x += x;
+                    piece.position.y += y;
+                    self.active_piece = Some(piece);
+                    true
+                }
+                None => panic!("Active piece missing!"),
+            }
+        } else {
+            false
+        }
+    }
+
+    fn can_move_offset(&self, x: isize, y: isize) -> bool {
+        match self.active_piece {
+            Some(piece) => piece
+                .get_occupied_spaces(piece.position.offset(x, y))
+                .iter()
+                .fold(true, |acc, pos| {
+                    acc && (pos.y as usize) < self.field.len()
+                        && (pos.x as usize) < PLAYFIELD_WIDTH
+                        && self.field[pos.y as usize][pos.x as usize].is_none()
+                }),
+            None => false,
+        }
+    }
+
     pub fn spawn_tetromino(&mut self) {
         self.active_piece = Some(Tetromino::from(
             self.next_pieces
                 .pop_front()
                 .expect("visible queue to be populated"),
         ));
-        self.next_pieces.push_back(self.bag.get_tetrino());
+        self.next_pieces.push_back(self.bag.get_tetromino());
         self.can_swap_hold = true;
     }
 
@@ -120,10 +149,14 @@ impl PlayField {
     pub fn can_active_piece_move_down(&self) -> bool {
         self.active_piece
             .and_then(|p| {
-                Some(p.get_next_occupied_spaces().iter().fold(true, |acc, pos| {
+                Some(
-                    acc && pos.y < self.field.len()
+                    p.get_falling_occupied_spaces()
-                        && self.field[pos.y as usize][pos.x as usize].is_none()
+                        .iter()
-                }))
+                        .fold(true, |acc, pos| {
+                            acc && (pos.y as usize) < self.field.len()
+                                && self.field[pos.y as usize][pos.x as usize].is_none()
+                        }),
+                )
             })
             .unwrap_or_else(|| false)
     }
@@ -134,7 +167,7 @@ impl PlayField {
                 let active_color = active_piece.get_color();
                 let new_pieces = active_piece.get_cur_occupied_spaces();
                 for Position { x, y } in &new_pieces {
-                    self.field[*y][*x] = Some(active_color);
+                    self.field[*y as usize][*x as usize] = Some(active_color);
                 }
 
                 self.active_piece = None;
@@ -146,10 +179,23 @@ impl PlayField {
 
     pub fn is_active_piece_in_valid_position(&self) -> bool {
         match self.active_piece {
-            Some(active_piece) => active_piece.get_cur_occupied_spaces().iter().all(|Position {x, y}| self.field[*y][*x].is_none()),
+            Some(active_piece) => {
+                self.can_piece_be_at_position(&active_piece)
+            },
             None => panic!("Tried checking if active piece is in a valid position but active piece doesn't exist")
         }
     }
+
+    pub fn can_piece_be_at_position(&self, tetromino: &Tetromino) -> bool {
+        tetromino
+            .get_cur_occupied_spaces()
+            .iter()
+            .all(|Position { x, y }| {
+                (*y as usize) < self.field.len()
+                    && (*x as usize) < PLAYFIELD_WIDTH
+                    && self.field[*y as usize][*x as usize].is_none()
+            })
+    }
 }
 
 impl Renderable for PlayField {
@@ -169,10 +215,10 @@ impl Renderable for PlayField {
                     None => canvas.set_draw_color(COLOR_BACKGROUND),
                 }
                 canvas.fill_rect(Rect::new(
-                    CELL_SIZE as i32 * x as i32 + 2,
+                    CELL_SIZE as i32 * x as i32 + BORDER_RADIUS as i32,
-                    CELL_SIZE as i32 * y as i32 + 2,
+                    CELL_SIZE as i32 * y as i32 + BORDER_RADIUS as i32,
-                    28,
+                    CELL_SIZE - 2 * BORDER_RADIUS,
-                    28,
+                    CELL_SIZE - 2 * BORDER_RADIUS,
                 ))?;
             }
         }

src/random.rs

@@ -17,7 +17,7 @@ impl RandomSystem {
         }
     }
 
-    pub fn get_tetrino(&mut self) -> TetrominoType {
+    pub fn get_tetromino(&mut self) -> TetrominoType {
         if self.cur_pos == 0 {
             self.refresh_bag();
         }

src/srs.rs

@@ -1,123 +1,158 @@
-use crate::playfield::PlayField;
+use crate::playfield::{Matrix, PlayField};
-use crate::tetromino::{Position, TetrominoType};
+use crate::tetromino::{Position, RotationState, Tetromino, TetrominoType};
-
+use std::collections::HashMap;
-#[derive(Copy, Clone)]
-pub struct Offset {
-    x: i8,
-    y: i8,
-}
-
-pub enum RotationDirection {
-    Clockwise,
-    AntiClockwise,
-}
 
 pub trait RotationSystem {
     fn default() -> Self;
 
-    fn get_rotation_offset(
+    fn rotate_left(&self, playfield: &PlayField) -> Result<Position, ()>;
-        piece: &TetrominoType,
+
-        center: &Position,
+    fn rotate_right(&self, playfield: &PlayField) -> Result<Position, ()>;
-        direction: RotationDirection,
-        playfield: &PlayField,
-    ) -> Option<Offset>;
 }
 
-pub struct SRS {}
+pub struct SRS {
+    jlstz_offset_data: HashMap<RotationState, Vec<Position>>,
+    i_offset_data: HashMap<RotationState, Vec<Position>>,
+    o_offset_data: HashMap<RotationState, Vec<Position>>,
+}
+
+enum RotationDirection {
+    Left,
+    Right,
+}
 
 impl SRS {
-    pub fn new() -> Self {
+    fn rotate_common(
-        Self {}
+        &self,
+        playfield: &PlayField,
+        rotation: RotationDirection,
+    ) -> Result<Position, ()> {
+        let active_piece = match playfield.active_piece {
+            Some(piece) => piece,
+            None => return Err(()),
+        };
+        let offset_data = match active_piece.piece_type {
+            TetrominoType::I => &self.i_offset_data,
+            TetrominoType::O => &self.o_offset_data,
+            _ => &self.jlstz_offset_data,
+        };
+        let prev_offsets = offset_data.get(&active_piece.rotation_state).unwrap();
+
+        let mut test_tetromino = active_piece.clone();
+        match rotation {
+            RotationDirection::Left => test_tetromino.rotate_left(),
+            RotationDirection::Right => test_tetromino.rotate_right(),
+        }
+
+        let cur_offsets = offset_data.get(&test_tetromino.rotation_state).unwrap();
+
+        let mut offsets = Vec::with_capacity(cur_offsets.len());
+
+        for i in 0..cur_offsets.len() {
+            offsets.push(prev_offsets[i] - cur_offsets[i]);
+        }
+
+        for offset in offsets {
+            let x = offset.x;
+            let y = offset.y;
+            let test_position = active_piece.position.offset(x, y);
+            test_tetromino.position = test_position;
+            if playfield.can_piece_be_at_position(&test_tetromino) {
+                return Ok(offset);
+            }
+        }
+
+        Err(())
     }
 }
 
 impl RotationSystem for SRS {
     fn default() -> Self {
-        SRS::new()
+        let mut jlstz_offset_data = HashMap::with_capacity(4);
+        let mut i_offset_data = HashMap::with_capacity(4);
+        let mut o_offset_data = HashMap::with_capacity(4);
+
+        jlstz_offset_data.insert(RotationState::O, vec![Position { x: 0, y: 0 }].repeat(5));
+        jlstz_offset_data.insert(
+            RotationState::R,
+            vec![
+                Position { x: 0, y: 0 },
+                Position { x: 1, y: 0 },
+                Position { x: 1, y: 1 },
+                Position { x: 0, y: -2 },
+                Position { x: 1, y: -2 },
+            ],
+        );
+        jlstz_offset_data.insert(RotationState::U, vec![Position { x: 0, y: 0 }].repeat(5));
+        jlstz_offset_data.insert(
+            RotationState::L,
+            vec![
+                Position { x: 0, y: 0 },
+                Position { x: -1, y: 0 },
+                Position { x: -1, y: 1 },
+                Position { x: 0, y: -2 },
+                Position { x: -1, y: -2 },
+            ],
+        );
+
+        i_offset_data.insert(
+            RotationState::O,
+            vec![
+                Position { x: 0, y: 0 },
+                Position { x: -1, y: 0 },
+                Position { x: 2, y: 0 },
+                Position { x: -1, y: 0 },
+                Position { x: 2, y: 0 },
+            ],
+        );
+        i_offset_data.insert(
+            RotationState::R,
+            vec![
+                Position { x: -1, y: 0 },
+                Position { x: 0, y: 0 },
+                Position { x: 0, y: 0 },
+                Position { x: 0, y: -1 },
+                Position { x: 0, y: 2 },
+            ],
+        );
+        i_offset_data.insert(
+            RotationState::U,
+            vec![
+                Position { x: -1, y: -1 },
+                Position { x: 1, y: -1 },
+                Position { x: -2, y: -1 },
+                Position { x: 1, y: 0 },
+                Position { x: -2, y: 0 },
+            ],
+        );
+        i_offset_data.insert(
+            RotationState::L,
+            vec![
+                Position { x: 0, y: -1 },
+                Position { x: 0, y: -1 },
+                Position { x: 0, y: -1 },
+                Position { x: 0, y: 1 },
+                Position { x: 0, y: -2 },
+            ],
+        );
+
+        o_offset_data.insert(RotationState::O, vec![Position { x: 0, y: 0 }]);
+        o_offset_data.insert(RotationState::R, vec![Position { x: 0, y: 1 }]);
+        o_offset_data.insert(RotationState::U, vec![Position { x: -1, y: 1 }]);
+        o_offset_data.insert(RotationState::L, vec![Position { x: -1, y: 0 }]);
+
+        SRS {
+            jlstz_offset_data,
+            i_offset_data,
+            o_offset_data,
+        }
     }
 
-    fn get_rotation_offset(
+    fn rotate_left(&self, playfield: &PlayField) -> Result<Position, ()> {
-        piece: &TetrominoType,
+        self.rotate_common(playfield, RotationDirection::Left)
-        center: &Position,
+    }
-        direction: RotationDirection,
+
-        playfield: &PlayField,
+    fn rotate_right(&self, playfield: &PlayField) -> Result<Position, ()> {
-    ) -> Option<Offset> {
+        self.rotate_common(playfield, RotationDirection::Right)
-        None
     }
 }
-
-#[derive(PartialEq, Eq, Hash)]
-enum Rotation {
-    O, // Spawn state
-    R, // Right rotation: clockwise rotation from spawn state
-    U, // Upside-down rotation: rotation after 2 left or right rotations from spawn state
-    L, // Left rotation: counterclockwise rotation from spawn state
-}
-
-struct OffsetData {
-    //     O: &[Offset],
-//     R: &[Offset],
-//     U: &[Offset],
-//     L: &[Offset],
-}
-
-impl OffsetData {
-    pub fn apply_right_rotation() {}
-}
-
-// static JLSTZOffsetData: OffsetData = OffsetData {
-//     O: vec![Offset { x: 0, y: 0 }],
-//     R: vec![
-//         Offset { x: 0, y: 0 },
-//         Offset { x: 1, y: 0 },
-//         Offset { x: 1, y: -1 },
-//         Offset { x: 0, y: 2 },
-//         Offset { x: 1, y: 2 },
-//     ],
-//     U: vec![Offset { x: 0, y: 0 }],
-//     L: vec![
-//         Offset { x: 0, y: 0 },
-//         Offset { x: -1, y: 0 },
-//         Offset { x: -1, y: -1 },
-//         Offset { x: 0, y: 2 },
-//         Offset { x: -1, y: 2 },
-//     ],
-// };
-
-// static IOffsetData: OffsetData = OffsetData {
-//     O: vec![
-//         Offset { x: 0, y: 0 },
-//         Offset { x: -1, y: 0 },
-//         Offset { x: 2, y: 0 },
-//         Offset { x: -1, y: 0 },
-//         Offset { x: 2, y: 0 },
-//     ],
-//     R: vec![
-//         Offset { x: -1, y: 0 },
-//         Offset { x: 0, y: 0 },
-//         Offset { x: 0, y: 0 },
-//         Offset { x: 0, y: 1 },
-//         Offset { x: 0, y: -2 },
-//     ],
-//     U: vec![
-//         Offset { x: -1, y: 1 },
-//         Offset { x: 1, y: 1 },
-//         Offset { x: -2, y: 1 },
-//         Offset { x: 1, y: 0 },
-//         Offset { x: -2, y: 0 },
-//     ],
-//     L: vec![
-//         Offset { x: 0, y: 1 },
-//         Offset { x: 0, y: 1 },
-//         Offset { x: 0, y: 1 },
-//         Offset { x: 0, y: -1 },
-//         Offset { x: 0, y: 2 },
-//     ],
-// };
-
-// static OOffsetData: OffsetData = OffsetData {
-//     O: vec![Offset { x: 0, y: 0 }],
-//     R: vec![Offset { x: 0, y: -1 }],
-//     U: vec![Offset { x: -1, y: -1 }],
-//     L: vec![Offset { x: -1, y: 0 }],
-// };

src/tetromino.rs

@@ -63,22 +63,22 @@ pub enum TetrominoType {
     L,
 }
 
-impl Into<Color> for TetrominoType {
+impl Into<MinoColor> for TetrominoType {
-    fn into(self) -> Color {
+    fn into(self) -> MinoColor {
         match self {
-            Self::I => COLOR_CYAN,
+            Self::I => MinoColor::Cyan,
-            Self::O => COLOR_YELLOW,
+            Self::O => MinoColor::Yellow,
-            Self::T => COLOR_PURPLE,
+            Self::T => MinoColor::Purple,
-            Self::S => COLOR_GREEN,
+            Self::S => MinoColor::Green,
-            Self::Z => COLOR_RED,
+            Self::Z => MinoColor::Red,
-            Self::J => COLOR_BLUE,
+            Self::J => MinoColor::Blue,
-            Self::L => COLOR_ORANGE,
+            Self::L => MinoColor::Orange,
         }
     }
 }
 
-#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
-enum RotationState {
+pub enum RotationState {
     O, // initial state
     R, // clockwise rotation
     L, // counter-clockwise rotation
@@ -93,22 +93,42 @@ impl Default for RotationState {
 
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub struct Position {
-    pub x: usize,
+    pub x: isize,
-    pub y: usize,
+    pub y: isize,
 }
 
 impl Position {
-    pub fn new(x: usize, y: usize) -> Position {
+    pub fn new(x: isize, y: isize) -> Position {
         Self {
-            x: x as usize,
+            x: x as isize,
-            y: y as usize,
+            y: y as isize,
         }
     }
 
-    fn offset(&self, x: isize, y: isize) -> Position {
+    pub fn offset(&self, x: isize, y: isize) -> Position {
         Self {
-            x: (x + self.x as isize) as usize,
+            x: x + self.x,
-            y: (y + self.y as isize) as usize,
+            y: y + self.y,
+        }
+    }
+}
+
+impl std::ops::Add for Position {
+    type Output = Self;
+    fn add(self, other: Self) -> Self {
+        Self {
+            x: self.x + other.x,
+            y: self.y + other.y,
+        }
+    }
+}
+
+impl std::ops::Sub for Position {
+    type Output = Self;
+    fn sub(self, other: Self) -> Self {
+        Self {
+            x: self.x - other.x,
+            y: self.y - other.y,
         }
     }
 }
@@ -117,7 +137,7 @@ impl Position {
 pub struct Tetromino {
     pub position: Position,
     pub piece_type: TetrominoType,
-    rotation_state: RotationState,
+    pub rotation_state: RotationState,
 }
 
 impl Tetromino {
@@ -129,14 +149,6 @@ impl Tetromino {
         }
     }
 
-    pub fn get_next_occupied_spaces(&self) -> Vec<Position> {
-        self.get_occupied_spaces(self.position.offset(0, 1))
-    }
-
-    pub fn get_cur_occupied_spaces(&self) -> Vec<Position> {
-        self.get_occupied_spaces(self.position)
-    }
-
     pub fn get_color(&self) -> MinoColor {
         match self.piece_type {
             TetrominoType::I => MinoColor::Cyan,
@@ -151,13 +163,24 @@ impl Tetromino {
 
     fn get_start_position(tetromino_type: TetrominoType) -> Position {
         if tetromino_type == TetrominoType::I {
-            Position::new(PLAYFIELD_WIDTH / 2 - 1, PLAYFIELD_HEIGHT - 1)
+            Position::new(
+                PLAYFIELD_WIDTH as isize / 2 - 1,
+                PLAYFIELD_HEIGHT as isize - 1,
+            )
         } else {
-            Position::new(PLAYFIELD_WIDTH / 2 - 1, PLAYFIELD_HEIGHT)
+            Position::new(PLAYFIELD_WIDTH as isize / 2 - 1, PLAYFIELD_HEIGHT as isize)
         }
     }
 
-    fn get_occupied_spaces(&self, center: Position) -> Vec<Position> {
+    pub fn get_falling_occupied_spaces(&self) -> Vec<Position> {
+        self.get_occupied_spaces(self.position.offset(0, 1))
+    }
+
+    pub fn get_cur_occupied_spaces(&self) -> Vec<Position> {
+        self.get_occupied_spaces(self.position)
+    }
+
+    pub fn get_occupied_spaces(&self, center: Position) -> Vec<Position> {
         let mut spaces = vec![center];
         match self.piece_type {
             TetrominoType::I => match self.rotation_state {
@@ -171,8 +194,16 @@ impl Tetromino {
                     center.offset(0, 1),
                     center.offset(0, 2),
                 ]),
-                RotationState::L => todo!(),
+                RotationState::U => spaces.extend_from_slice(&[
-                RotationState::U => todo!(),
+                    center.offset(-2, 0),
+                    center.offset(-1, 0),
+                    center.offset(1, 0),
+                ]),
+                RotationState::L => spaces.extend_from_slice(&[
+                    center.offset(0, -2),
+                    center.offset(0, -1),
+                    center.offset(0, 1),
+                ]),
             },
             TetrominoType::J => match self.rotation_state {
                 RotationState::O => spaces.extend_from_slice(&[
@@ -180,9 +211,21 @@ impl Tetromino {
                     center.offset(-1, 0),
                     center.offset(1, 0),
                 ]),
-                RotationState::R => todo!(),
+                RotationState::R => spaces.extend_from_slice(&[
-                RotationState::L => todo!(),
+                    center.offset(0, -1),
-                RotationState::U => todo!(),
+                    center.offset(1, -1),
+                    center.offset(0, 1),
+                ]),
+                RotationState::U => spaces.extend_from_slice(&[
+                    center.offset(-1, 0),
+                    center.offset(1, 0),
+                    center.offset(1, 1),
+                ]),
+                RotationState::L => spaces.extend_from_slice(&[
+                    center.offset(0, -1),
+                    center.offset(-1, 1),
+                    center.offset(0, 1),
+                ]),
             },
             TetrominoType::L => match self.rotation_state {
                 RotationState::O => spaces.extend_from_slice(&[
@@ -190,9 +233,21 @@ impl Tetromino {
                     center.offset(-1, 0),
                     center.offset(1, 0),
                 ]),
-                RotationState::R => todo!(),
+                RotationState::R => spaces.extend_from_slice(&[
-                RotationState::L => todo!(),
+                    center.offset(0, -1),
-                RotationState::U => todo!(),
+                    center.offset(0, 1),
+                    center.offset(1, 1),
+                ]),
+                RotationState::U => spaces.extend_from_slice(&[
+                    center.offset(-1, 0),
+                    center.offset(1, 0),
+                    center.offset(-1, 1),
+                ]),
+                RotationState::L => spaces.extend_from_slice(&[
+                    center.offset(-1, -1),
+                    center.offset(0, -1),
+                    center.offset(0, 1),
+                ]),
             },
             TetrominoType::O => match self.rotation_state {
                 RotationState::O => spaces.extend_from_slice(&[
@@ -200,9 +255,21 @@ impl Tetromino {
                     center.offset(1, -1),
                     center.offset(1, 0),
                 ]),
-                RotationState::R => todo!(),
+                RotationState::R => spaces.extend_from_slice(&[
-                RotationState::L => todo!(),
+                    center.offset(1, 0),
-                RotationState::U => todo!(),
+                    center.offset(0, 1),
+                    center.offset(1, 1),
+                ]),
+                RotationState::U => spaces.extend_from_slice(&[
+                    center.offset(-1, 0),
+                    center.offset(-1, 1),
+                    center.offset(0, 1),
+                ]),
+                RotationState::L => spaces.extend_from_slice(&[
+                    center.offset(-1, -1),
+                    center.offset(0, -1),
+                    center.offset(-1, 0),
+                ]),
             },
             TetrominoType::S => match self.rotation_state {
                 RotationState::O => spaces.extend_from_slice(&[
@@ -210,9 +277,21 @@ impl Tetromino {
                     center.offset(1, -1),
                     center.offset(-1, 0),
                 ]),
-                RotationState::R => todo!(),
+                RotationState::R => spaces.extend_from_slice(&[
-                RotationState::L => todo!(),
+                    center.offset(0, -1),
-                RotationState::U => todo!(),
+                    center.offset(1, 0),
+                    center.offset(1, 1),
+                ]),
+                RotationState::U => spaces.extend_from_slice(&[
+                    center.offset(0, 1),
+                    center.offset(1, 0),
+                    center.offset(-1, 1),
+                ]),
+                RotationState::L => spaces.extend_from_slice(&[
+                    center.offset(-1, -1),
+                    center.offset(-1, 0),
+                    center.offset(0, 1),
+                ]),
             },
             TetrominoType::T => match self.rotation_state {
                 RotationState::O => spaces.extend_from_slice(&[
@@ -220,9 +299,21 @@ impl Tetromino {
                     center.offset(-1, 0),
                     center.offset(1, 0),
                 ]),
-                RotationState::R => todo!(),
+                RotationState::R => spaces.extend_from_slice(&[
-                RotationState::L => todo!(),
+                    center.offset(0, -1),
-                RotationState::U => todo!(),
+                    center.offset(0, 1),
+                    center.offset(1, 0),
+                ]),
+                RotationState::U => spaces.extend_from_slice(&[
+                    center.offset(0, 1),
+                    center.offset(-1, 0),
+                    center.offset(1, 0),
+                ]),
+                RotationState::L => spaces.extend_from_slice(&[
+                    center.offset(0, -1),
+                    center.offset(-1, 0),
+                    center.offset(0, 1),
+                ]),
             },
             TetrominoType::Z => match self.rotation_state {
                 RotationState::O => spaces.extend_from_slice(&[
@@ -230,14 +321,44 @@ impl Tetromino {
                     center.offset(0, -1),
                     center.offset(1, 0),
                 ]),
-                RotationState::R => todo!(),
+                RotationState::R => spaces.extend_from_slice(&[
-                RotationState::L => todo!(),
+                    center.offset(1, -1),
-                RotationState::U => todo!(),
+                    center.offset(1, 0),
+                    center.offset(0, 1),
+                ]),
+                RotationState::U => spaces.extend_from_slice(&[
+                    center.offset(-1, 0),
+                    center.offset(0, 1),
+                    center.offset(1, 1),
+                ]),
+                RotationState::L => spaces.extend_from_slice(&[
+                    center.offset(0, -1),
+                    center.offset(-1, 0),
+                    center.offset(-1, 1),
+                ]),
             },
         }
 
         spaces
     }
+
+    pub fn rotate_left(&mut self) {
+        self.rotation_state = match self.rotation_state {
+            RotationState::O => RotationState::L,
+            RotationState::L => RotationState::U,
+            RotationState::U => RotationState::R,
+            RotationState::R => RotationState::O,
+        }
+    }
+
+    pub fn rotate_right(&mut self) {
+        self.rotation_state = match self.rotation_state {
+            RotationState::O => RotationState::R,
+            RotationState::R => RotationState::U,
+            RotationState::U => RotationState::L,
+            RotationState::L => RotationState::O,
+        }
+    }
 }
 
 impl From<TetrominoType> for Tetromino {
@@ -249,9 +370,14 @@ impl From<TetrominoType> for Tetromino {
 impl Renderable for Tetromino {
     fn render(&self, canvas: &mut Canvas<Window>) -> Result<(), String> {
         for Position { x, y } in self.get_cur_occupied_spaces() {
-            canvas.set_draw_color(self.piece_type);
+            canvas.set_draw_color::<MinoColor>(self.piece_type.into());
             let height = y as isize - PLAYFIELD_HEIGHT as isize;
-            canvas.fill_rect(Rect::new(32 * x as i32 + 2, 32 * height as i32 + 2, 28, 28))?;
+            canvas.fill_rect(Rect::new(
+                CELL_SIZE as i32 * x as i32 + BORDER_RADIUS as i32,
+                CELL_SIZE as i32 * height as i32 + BORDER_RADIUS as i32,
+                CELL_SIZE - 2 * BORDER_RADIUS,
+                CELL_SIZE - 2 * BORDER_RADIUS,
+            ))?;
         }
         Ok(())
     }