.

.

src/user/bin/gameoflife.rs

@@ -0,0 +1,123 @@
+use alloc::borrow::ToOwned;
+use alloc::string::String;
+use alloc::vec;
+use alloc::vec::Vec;
+use alloc::boxed::Box;
+use crate::std::application::{Application, Error};
+use async_trait::async_trait;
+use crate::kernel::render::{Color, ColorCode, ScreenChar};
+use crate::{println, serial_println};
+use crate::std::frame::ColouredElement;
+use crate::std::io::{Screen, Stdin};
+use crate::std::time::wait;
+use crate::user::bin::snake::Game;
+
+pub struct GameOfLife {
+    frame: [[ScreenChar; 80]; 25],
+}
+
+const LOOP_SPEED: f64 = 0.1;
+
+#[async_trait]
+impl Application for GameOfLife {
+    fn new() -> Self {
+        Self {
+            frame: [[ScreenChar::null(); 80]; 25],
+        }
+    }
+    async fn run(&mut self, args: Vec<String>) -> Result<(), Error> {
+        // setup:
+        Screen::application_mode();
+
+        let xoffset = 38;
+        let yoffset = 5;
+
+        // example pattern
+        self.activate(0 + xoffset, 1 + yoffset);
+        self.activate(1 + xoffset, 0 + yoffset);
+        self.activate(1 + xoffset, 1 + yoffset);
+        self.activate(2 + xoffset, 1 + yoffset);
+
+        self.activate(0 + xoffset, 4 + yoffset);
+        self.activate(1 + xoffset, 4 + yoffset);
+        self.activate(2 + xoffset, 4 + yoffset);
+
+        self.activate(0 + xoffset, 6 + yoffset);
+        self.activate(2 + xoffset, 6 + yoffset);
+        self.activate(0 + xoffset, 7 + yoffset);
+        self.activate(2 + xoffset, 7 + yoffset);
+
+        self.activate(0 + xoffset, 9 + yoffset);
+        self.activate(1 + xoffset, 9 + yoffset);
+        self.activate(2 + xoffset, 9 + yoffset);
+
+        self.activate(0 + xoffset, 12 + yoffset);
+        self.activate(1 + xoffset, 13 + yoffset);
+        self.activate(1 + xoffset, 12 + yoffset);
+        self.activate(2 + xoffset, 12 + yoffset);
+
+        self.mainloop()?;
+
+        Screen::terminal_mode();
+        Ok(())
+    }
+}
+
+impl GameOfLife {
+    fn activate(&mut self, x: u8, y: u8) {
+        self.frame[24 - y as usize][x as usize] = ScreenChar::new('#' as u8, ColorCode::new(Color::Green, Color::Black));
+    }
+    fn mainloop(&mut self) -> Result<(), Error> {
+        'mainloop: loop {
+            // render element previous frame before resetting.
+
+            wait(LOOP_SPEED);
+
+            self.render().map_err(|_| Error::ApplicationError(String::from("failed to render game screen")))?;
+            match Stdin::try_keystroke() {
+                Some('x') => break 'mainloop,
+                _ => {},
+            }
+
+            // TODO: Logic goes here
+
+            let mut new_frame = [[ScreenChar::null(); 80]; 25];
+
+            self.frame.iter().enumerate().for_each(|(y, row)| row.iter().enumerate().for_each(|(x, chr)| {
+                new_frame[y][x] = self.get_new_value(x as u8, y as u8);
+            }));
+
+            self.frame = new_frame;
+        }
+        Ok(())
+    }
+
+    fn get_new_value(&self, x: u8, y: u8) -> ScreenChar {
+        let adjacent = vec![(0i32, 1i32), (0, -1), (1, 0), (-1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)].into_iter().map(|(relx, rely)| {
+            (x as i32 + relx, y as i32 + rely)
+        }).filter(|(absx, absy)|  {
+            0 <= *absx && *absx < 80 && 0 <= *absy && *absy < 25
+        }).collect::<Vec<(i32, i32)>>();
+
+        let alive = adjacent.iter().filter(|(x, y)| self.frame[*y as usize][*x as usize] == ScreenChar::new('#' as u8, ColorCode::new(Color::Green, Color::Black))).count();
+
+        if alive == 2 {
+            if self.frame[y as usize][x as usize] == ScreenChar::new('#' as u8, ColorCode::new(Color::Green, Color::Black)) {
+                return ScreenChar::new('#' as u8, ColorCode::new(Color::Green, Color::Black));
+            } else {
+                return ScreenChar::null();
+            }
+        } else if alive == 3 {
+            ScreenChar::new('#' as u8, ColorCode::new(Color::Green, Color::Black))
+        } else {
+            ScreenChar::null()
+        }
+    }
+
+    fn render(&self) -> Result<(), ()> {
+        let cloned_frame = self.frame.iter().map(|r| r.iter().map(|c| c.clone()).collect::<Vec<ScreenChar>>()).collect::<Vec<Vec<ScreenChar>>>();
+        let mut elem = ColouredElement::generate(cloned_frame, (80, 25));
+        elem.render((0,0));
+        Ok(())
+    }
+}

src/user/bin/mod.rs

@@ -9,3 +9,5 @@ mod gigachad_detector;
 //mod shellrewrite;
 mod snake;
 mod grapher;
+mod gameoflife;
+mod tetris;

src/user/bin/shell.rs

@@ -6,7 +6,7 @@ use x86_64::instructions::interrupts;
 use alloc::{boxed::Box, string::{String, ToString}, vec, vec::Vec};
 use vga::writers::{GraphicsWriter, PrimitiveDrawing};
 
-use crate::{print, println, std, std::application::{Application, Error}, user::bin::*};
+use crate::{print, printerr, println, std, std::application::{Application, Error}, user::bin::*};
 use crate::std::io::{Color, write, Screen, Stdin};
 use crate::std::random::Random;
 use crate::user::bin::gigachad_detector::GigachadDetector;
@@ -51,11 +51,19 @@ pub async fn eventloop() {
 }
 
 fn handle_error(e: Error) {
-    if let Error::ApplicationError(s) = e {
-        println!("there was an error! exiting program!: {}", s);
-    } else {
-        println!("there was an error! exiting program!");
-
+    match e {
+        Error::EmptyCommand => {
+            printerr!("empty command");
+        },
+        Error::UnknownCommand(cmd_str) => {
+            printerr!("unknown command: '{}'", cmd_str);
+        },
+        Error::ApplicationError(e) => {
+            printerr!("application returned error:\n{}", e);
+        },
+        Error::CommandFailed(e) => {
+            printerr!("command failed:\n{}", e);
+        },
     }
 }
 
@@ -112,8 +120,17 @@ async fn exec() -> Result<(), Error> {
         }
         "snake" => {
             let mut game = snake::Game::new();
-            game.run(Vec::new()).await;
+            game.run(args).await?;
         }
+        "gameoflife" => {
+            let mut game = gameoflife::GameOfLife::new();
+            game.run(Vec::new()).await?;
+        }
+        "tetris" => {
+            let mut game = tetris::TetrisEngine::new();
+            game.run(Vec::new()).await?;
+        }
+
         "gigachad?" => {
             let mut gigachad_detector = GigachadDetector::new();
             gigachad_detector.run(args).await?;
@@ -122,13 +139,12 @@ async fn exec() -> Result<(), Error> {
         "wait" => {
             use std::time::wait;
 
-            for _ in 0..20 {
-                wait(0.5);
-                let key = Stdin::try_keystroke();
-                println!("waited {}", match key {
-                    Some(c) => c,
-                    None => '_',
-                });
+            if args.len() != 1 {
+                return Err(Error::CommandFailed("exactly one argument must be provided".to_string()))
+            }
+            if let Ok(time) = args[0].parse::<u64>() {
+                wait(time as f64);
+                println!("waited for {}s", time);
             }
         }
 
@@ -149,12 +165,6 @@ async fn exec() -> Result<(), Error> {
             // not sure why this code was here but leaving it in case weird bugs happen so i remember to add it back if so
             //interrupts::without_interrupts(|| {});
         }
-
-        "print" => {
-            use crate::std::os::OS;
-            let x: String = OS.lock().version.clone();
-            println!("{}", x);
-        }
         "switch" => {
             Screen::switch();
         }
@@ -170,7 +180,7 @@ async fn exec() -> Result<(), Error> {
 		}
         _ => {
             return Err(Error::UnknownCommand(
-                "command not yet implemented".to_string(),
+                cmd
             ))
         }
     };

src/user/bin/snake.rs

@@ -1,4 +1,4 @@
-use alloc::string::String;
+use alloc::string::{String, ToString};
 use alloc::{format, vec, vec::Vec, boxed::Box};
 use alloc::borrow::ToOwned;
 use core::arch::x86_64::_mm_test_all_ones;
@@ -10,12 +10,19 @@ use crate::kernel::tasks::keyboard::KEYBOARD;
 use crossbeam_queue::SegQueue;
 use lazy_static::lazy_static;
 use crate::kernel::render::{ColorCode, ScreenChar};
-use crate::{println};
+use crate::{println, serial_println};
 use crate::std::application::{Application, Error};
 use crate::std::random::Random;
 use crate::system::std::frame::ColouredElement;
 use super::super::lib::coords::{Line, Position, Direction};
 
+#[derive(PartialEq)]
+enum Gamemode {
+    SinglePlayer,
+    WithAI(u8, u8, u8), // number of ai, ai length, number of poi's
+    Uninitialised,
+}
+
 
 #[derive(Clone, Debug, PartialEq)]
 enum Status {
@@ -29,7 +36,7 @@ pub struct Game {
     snakes: Vec<Snake>,
     pois: Vec<Position>,
     score: u8,
-    hardmode: bool,
+    gamemode: Gamemode,
 }
 
 
@@ -41,36 +48,70 @@ impl Application for Game {
             snakes: Vec::new(),
             pois: Vec::new(),
             score: 0,
-            hardmode: false,
+            gamemode: Gamemode::Uninitialised,
         }
     }
 
-    async fn run(&mut self, _: Vec<String>) -> Result<(), Error> {
-        //Screen::application_mode();
+    async fn run(&mut self, args: Vec<String>) -> Result<(), Error> {
 
+        let mut settings = [0, 0, 0]; // ai_count, snake_len, poi_count
 
-        // make the first poi
-
-        self.snakes.push(Snake::player(0));
-
-        for i in 0..5 {
-            self.new_poi();
-            self.snakes.push(Snake::ai(i + 1));
+        if args.len() == 0 {
+            self.gamemode == Gamemode::SinglePlayer;
+        } else {
+            match args[0].as_str() {
+                "easy" => {
+                    self.gamemode = Gamemode::SinglePlayer;
+                },
+                "normal" => {
+                    self.gamemode = Gamemode::WithAI(5, 5, 5);
+                },
+                "impossible" => {
+                    self.gamemode = Gamemode::WithAI(10, 15, 5);
+                }
+                "chaos" => {
+                    self.gamemode = Gamemode::WithAI(20, 15, 20);
+                }
+                _ => {
+                    self.gamemode = Gamemode::SinglePlayer;
+                },
+            }
         }
 
+        // sets up game based on difficulty
+        self.prepare();
+
+        // switch OS to application mode
+        Screen::application_mode();
         // render the initial state of the screen.
         self.render().map_err(|_| Error::ApplicationError(String::from("failed to render game screen")))?;
-
         // run the game
         self.gameloop().await?;
-
         // return to the terminal
-        //Screen::terminal_mode();
+        Screen::terminal_mode();
         Ok(())
     }
 }
 
 impl Game {
+    fn prepare(&mut self) {
+        self.snakes.push(Snake::player(0, 3));
+
+        if let Gamemode::WithAI(ai_count, snake_len, poi_count) = self.gamemode {
+            for i in 0..ai_count {
+                self.snakes.push(Snake::ai(i as usize + 1, snake_len));
+            }
+            (0..poi_count).for_each(|_| self.new_poi());
+        } else {
+            self.new_poi()
+        }
+    }
+
+    fn respawn_snakes(&mut self) {
+        if let Gamemode::WithAI(ai_count, snake_len, _poi) = self.gamemode {
+            self.snakes.push(Snake::ai(self.snakes.len() + 1, snake_len));
+        }
+    }
 
     async fn gameloop(&mut self) -> Result<(), Error> { // main gameloop
         let mut all_points: Vec<Position>;
@@ -84,11 +125,14 @@ impl Game {
 
             for i in 0..length {
                 let points: Vec<Position> = self.snakes.clone().into_iter().map(|s| s.tail).flatten().collect();
-                let res = self.snakes[i].next(&self.pois, &points);
+                let res = self.snakes[i].next(&points, &self.pois);
 
                 match res {
                     Status::Lost => {
-                        if !self.snakes[i].ai_controlled {
+                        if self.snakes[i].ai_controlled {
+                            self.snakes.remove(i);
+                            self.respawn_snakes();
+                        } else {
                             self.render_end_screen().map_err(|_| Error::ApplicationError(String::from("failed to render end screen")))?;
                             // loop triggers when game is lost
                             loop {
@@ -111,6 +155,7 @@ impl Game {
                     Status::None => {},
                 }
             }
+            self.snakes.retain(|s| s.alive);
 
             self.render().map_err(|_| Error::ApplicationError(String::from("failed to render game screen")))?;
         };
@@ -128,9 +173,18 @@ impl Game {
 
     fn render(&mut self) -> Result<(), ()> {
         let mut frame = vec![vec![ScreenChar::null(); 80]; 25];
-        self.snakes.clone().into_iter().map(|s| s.tail).flatten().for_each(|p| {
-            frame[24 - p.y as usize][p.x as usize] = ScreenChar::new('@' as u8, ColorCode::new(Color::Cyan, Color::Black));
-        });
+        let mut curr_colour = ColorCode::new(Color::LightBlue, Color::Black);
+
+        for s in self.snakes.clone() {
+            curr_colour = if s.ai_controlled {
+                ColorCode::new(Color::Cyan, Color::Black)
+            } else {
+                ColorCode::new(Color::LightGreen, Color::Black)
+            };
+            for point in s.tail.iter() {
+                frame[24 - point.y as usize][point.x as usize] = ScreenChar::new('@' as u8, curr_colour);
+            }
+        }
 
         self.pois.iter().for_each(|poi| {
             frame[24 - poi.y as usize][poi.x as usize] = ScreenChar::new('o' as u8, ColorCode::new(Color::Red, Color::Black));
@@ -138,7 +192,11 @@ impl Game {
 
         let literal = format!("snake go brr score:  {}", self.score);
         let msg = Game::centre_text(80, literal);
-        frame[1] = msg.chars().map(|c| ScreenChar::new(c as u8, ColorCode::new(Color::LightGreen, Color::Black))).collect();
+        msg.chars().enumerate().for_each(|(i, c)| {
+            if c != ' ' {
+                frame[1][i] = ScreenChar::new(c as u8, ColorCode::new(Color::LightGreen, Color::Black))
+            }
+        });
 
         let mut elem = ColouredElement::generate(frame, (80, 25));
         elem.render((0,0));
@@ -185,43 +243,45 @@ struct Snake {
     head: Position,
     tail: Vec<Position>,
     dir: Direction,
+    alive: bool,
 }
 
 impl Snake {
-    fn ai(id: usize) -> Self {
+    fn ai(id: usize, len: u8) -> Self {
         Self {
             ai_controlled: true,
-            head: Position { x: 4 + 4*id as i64 * 2, y: 9 },
-            tail: (1..4).map(|p| Position { x: 4 + 4*id as i64, y: 5 + p}).collect(),
-            dir: Direction::PosY,
+            head: Position { x: 2 + 2*id as i64 * 2, y: 9 },
+            tail: (1..=len as i64).map(|p| Position { x: 2 + 2*id as i64, y: 5 + p}).collect(),
+            dir: Direction::Degrees0,
+            alive: true,
         }
     }
-    fn player(id: usize) -> Self {
+    fn player(id: usize, len: u8) -> Self {
         Self {
             ai_controlled: false,
-            head: Position { x: 4 + 4*id as i64, y: 9 },
-            tail: (1..4).map(|p| Position { x: 4 + 4*id as i64, y: 5 + p}).collect(),
-            dir: Direction::PosY,
+            head: Position { x: 2 + 2*id as i64, y: 9 },
+            tail: (1..=len as i64).map(|p| Position { x: 2 + 2*id as i64, y: 5 + p}).collect(),
+            dir: Direction::Degrees0,
+            alive: true,
         }
     }
 
-    fn next(&mut self, points_of_interest: &Vec<Position>, tails: &Vec<Position>) -> Status {  // returns (lose_condition, scored)
+    fn next(&mut self, tails: &Vec<Position>, points_of_interest: &Vec<Position>) -> Status {  // returns (lose_condition, scored)
 
         // uses pathing algorithm if ai else keyboard input if human
         if self.ai_controlled {
-            self.dir = PathFinder::decide(&self.head, points_of_interest, tails);
+            self.dir = PathFinder::decide(&self.head, tails, points_of_interest);
         } else {
-            // if let Some(c) = Stdin::try_keystroke() {
-            //     self.dir = match c {
-            //         'w' => Direction::PosY,
-            //         'a' => Direction::NegX,
-            //         's' => Direction::NegY,
-            //         'd' => Direction::PosX,
-            //         'x' => return Status::Exited,
-            //         _ => self.dir.clone(),
-            //     }
-            // }
-            self.dir = Direction::None;
+            if let Some(c) = Stdin::try_keystroke() {
+                self.dir = match c {
+                    'w' => Direction::Degrees0,
+                    'a' => Direction::Degrees270,
+                    's' => Direction::Degrees180,
+                    'd' => Direction::Degrees90,
+                    'x' => return Status::Exited,
+                    _ => self.dir.clone(),
+                };
+            }
         }
 
         if self.dir != Direction::None {
@@ -229,14 +289,15 @@ impl Snake {
         }
 
         match self.dir {
-            Direction::PosY => self.head.y += 1,
-            Direction::NegY => self.head.y -= 1,
-            Direction::NegX => self.head.x -= 1,
-            Direction::PosX => self.head.x += 1,
+            Direction::Degrees0 => self.head.y += 1,
+            Direction::Degrees180 => self.head.y -= 1,
+            Direction::Degrees270 => self.head.x -= 1,
+            Direction::Degrees90 => self.head.x += 1,
             Direction::None => {},
         }
 
         if self.lose_condition(tails) {
+            self.alive = false;
             self.tail.remove(0);
             return Status::Lost;
         }
@@ -266,7 +327,7 @@ struct PathFinder {}
 impl PathFinder {
     fn decide(head: &Position, tails: &Vec<Position>, pois: &Vec<Position>) -> Direction {
         let nearest_poi = head.nearest(pois);
-        let rel_pos = head.distance(&nearest_poi);
+        let rel_pos = head.get_offset(&nearest_poi);
 
         // check actions don't lose them the game
         let mut possible_moves = Vec::new();
@@ -274,27 +335,28 @@ impl PathFinder {
 
         h = Position { x: head.x + 1, y: head.y };
         if !(PathFinder::check_bounds(&h) || PathFinder::check_collision(&h, &tails)) {
-            possible_moves.push(Direction::PosX);
+            possible_moves.push(Direction::Degrees90);
         }
         h = Position { x: head.x - 1, y: head.y };
         if !(PathFinder::check_bounds(&h) || PathFinder::check_collision(&h, &tails)) {
-            possible_moves.push(Direction::NegX);
+            possible_moves.push(Direction::Degrees270);
         }
         h = Position { x: head.x, y: head.y + 1 };
         if !(PathFinder::check_bounds(&h) || PathFinder::check_collision(&h, &tails)) {
-            possible_moves.push(Direction::PosY);
+            possible_moves.push(Direction::Degrees0);
         }
         h = Position { x: head.x, y: head.y - 1 };
         if !(PathFinder::check_bounds(&h) || PathFinder::check_collision(&h, &tails)) {
-            possible_moves.push(Direction::NegY);
+            possible_moves.push(Direction::Degrees180);
         }
 
         if possible_moves.is_empty() {
-            panic!("no possible moves");
-            return Direction::None;
+            // panic!("no possible moves"); // use for debugging if a snake cannot find a move for some reason
+            return Direction::Degrees90;
         } else {
             let optimal = PathFinder::optimal_move(head, &rel_pos, &possible_moves);
-            println!("{:?} {:?} {:?} {:?}", nearest_poi, rel_pos, head, optimal);
+         //   serial_println!("{:?} {:?} {:?} {:?}", nearest_poi, rel_pos, head, optimal);
+            return optimal;
         }
 
         Direction::None
@@ -315,19 +377,19 @@ impl PathFinder {
         }
 
         if rel_pos.x < 0 {
-            optimal_moves[x_offset] = Direction::NegX;
-            optimal_moves[x_offset + 2] = Direction::PosX;
+            optimal_moves[x_offset] = Direction::Degrees270;
+            optimal_moves[x_offset + 2] = Direction::Degrees90;
         } else {
-            optimal_moves[x_offset] = Direction::PosX;
-            optimal_moves[x_offset + 2] = Direction::NegX;
+            optimal_moves[x_offset] = Direction::Degrees90;
+            optimal_moves[x_offset + 2] = Direction::Degrees270;
         }
 
         if rel_pos.y < 0 {
-            optimal_moves[y_offset] = Direction::NegY;
-            optimal_moves[y_offset + 2] = Direction::PosY;
+            optimal_moves[y_offset] = Direction::Degrees180;
+            optimal_moves[y_offset + 2] = Direction::Degrees0;
         } else {
-            optimal_moves[y_offset] = Direction::PosY;
-            optimal_moves[y_offset + 2] = Direction::NegY;
+            optimal_moves[y_offset] = Direction::Degrees0;
+            optimal_moves[y_offset + 2] = Direction::Degrees180;
         }
         //println!("moves: {:?}, optimal_moves: {:?}, rel_pos: {:?}", moves, optimal_moves, rel_pos);
         for m in optimal_moves {

src/user/bin/tetris.rs

@@ -0,0 +1,119 @@
+use async_trait::async_trait;
+use alloc::boxed::Box;
+use alloc::string::String;
+use alloc::vec;
+use alloc::vec::Vec;
+use crate::kernel::render::ScreenChar;
+use crate::{serial_print, serial_println};
+use crate::std::application::{Application, Error};
+use crate::std::io::Screen;
+use crate::user::lib::coords::{Direction, Position, PositionReal};
+use crate::user::lib::libgui::libgui_core::Pos;
+
+
+pub(crate) struct TetrisEngine {
+    score: u32,
+    next: TetrisPiece,
+    completed_frame: [[ScreenChar; 80]; 25], // this frame does not contain falling blocks, only static ones
+
+}
+
+#[async_trait]
+impl Application for TetrisEngine {
+    fn new() -> Self {
+        Self {
+            score: 0,
+            next: TetrisPiece::new(PieceType::OPiece),
+            completed_frame: [[ScreenChar::null(); 80]; 25],
+        }
+    }
+    async fn run(&mut self, args: Vec<String>) -> Result<(), Error> {
+        // setup:
+        Screen::application_mode();
+
+        let piece_type = PieceType::OPiece;
+        let mut piece = TetrisPiece::new(piece_type);
+
+        serial_println!("{:?}", piece.get_positions());
+        piece.rotate_right();
+        serial_println!("{:?}", piece.get_positions());
+
+
+        Screen::terminal_mode();
+        Ok(())
+    }
+}
+
+
+
+
+
+
+
+
+
+
+
+enum PieceType {
+    OPiece,
+    IPiece,
+    JPiece,
+    LPiece,
+    SPiece,
+    ZPiece,
+}
+
+struct TetrisPiece {
+    type_: PieceType,
+    pos: Position,
+    rotation: Direction,
+}
+
+impl TetrisPiece {
+    fn new(type_: PieceType) -> Self {
+        Self {
+            type_,
+            pos: Position { x: 40, y: 30 },
+            rotation: Direction::Degrees0,
+        }
+    }
+    fn rotate_right(&mut self) {
+        self.rotation = match self.rotation {
+            Direction::Degrees90 => Direction::Degrees180,
+            Direction::Degrees180 => Direction::Degrees270,
+            Direction::Degrees270 => Direction::Degrees0,
+            Direction::Degrees0 => Direction::Degrees90,
+            Direction::None => panic!("direction should never be none in this application"),
+        };
+    }
+
+    /// function that maps the coordinates of the object.
+    fn get_positions(&self) -> Vec<Position> {
+        match self.type_ {
+            PieceType::OPiece => {
+                let positions = vec![
+                    PositionReal { x: -0.5, y: -0.5 },
+                    PositionReal { x: 0.5, y: -0.5 },
+                    PositionReal { x: -0.5, y: 0.5 },
+                    PositionReal { x: 0.5, y: 0.5 },
+                ];
+                positions.into_iter().map(|p|
+                    ( p.rotate(self.rotation.clone()) + self.pos.clone().real() + PositionReal { x: -0.5, y: 0.5 } ).integer()
+                ).collect::<Vec<Position>>()
+            }
+            _ => unimplemented!("E"),
+        }
+    }
+}
+
+
+
+
+
+
+
+
+
+
+
+

src/user/lib/coords.rs

@@ -1,8 +1,8 @@
 use alloc::borrow::ToOwned;
 use alloc::vec::Vec;
+use libm::sqrt;
 use crate::println;
 
-
 #[derive(Clone, Debug, PartialEq)]
 pub enum Line {
     Vertical(i64),
@@ -15,61 +15,267 @@ pub struct Position {
     pub y: i64,
 }
 
+/// a point represented with x and y coordinates.
 impl Position {
+
+    /// checks if the point is on a given line
     pub fn touches_line(&self, line: &Line) -> bool {
         match line {
-            Line::Vertical(y) => self.y == *y,
-            Line::Horizontal(x) => self.x == *x,
+            Line::Vertical(y) => self.y as i64 == *y,
+            Line::Horizontal(x) => self.x as i64 == *x,
         }
     }
 
+    /// checks if two points are equal and returns the x and y equality result for each
     pub fn aligns(&self, other: &Position) -> (bool, bool) {
         (self.x == other.x, self.y == other.y)
     }
 
-    pub fn distance(&self, other: &Position) -> Position {
+    /// calculates x + y distance between two points
+    pub fn get_offset(&self, other: &Position) -> Position {
         Position {
             x: other.x - self.x,
             y: other.y - self.y
         }
     }
 
+    pub fn diagonal_distance(&self, other: &Position) -> i64 {
+        sqrt((self.x - other.x).pow(2) as f64 + (self.y - other.y).pow(2) as f64) as i64
+    }
+
     pub fn as_usize(&self) -> (usize, usize) {
         (self.x as usize, self.y as usize)
     }
 
     pub fn magnitude(&self) -> i64 {
-        (self.x.abs() + self.y.abs())
+        self.x.abs() + self.y.abs()
     }
 
     pub fn nearest(&self, points: &Vec<Position>) -> Position {
 
         let mut points = points.clone();
         points.sort_by_key(|p| {
-            let p = self.distance(p);
+            let p = self.get_offset(p);
             p.x.abs() + p.y.abs()
         });
         points.first().unwrap().to_owned()
     }
+
+
+    pub fn rotated_around(&self, angle: Direction, p: Position) -> Position { // rotates by an angle around a point
+
+        // gets coords relative to point to rotate around
+        let mut p_offset = self.get_offset(&p);
+
+        p_offset = match angle { // default angle is posy = 0 degrees and negy = 180
+            Direction::Degrees0 => Position {
+                x: p_offset.x,
+                y: p_offset.y,
+            },
+            Direction::Degrees90 => Position {
+                x: -p_offset.y,
+                y: p_offset.x,
+            },
+            Direction::Degrees180 => Position {
+                x: -p_offset.x,
+                y: -p_offset.y,
+            },
+            Direction::Degrees270 => Position {
+                x: p_offset.y,
+                y: -p_offset.x,
+            },
+            Direction::None => panic!("direction should never be none in this application"),
+        };
+
+        return p_offset + p;
+    }
+
+    pub fn rotate(&self, angle: Direction) -> Position { // rotates by an angle around origin
+        match angle { // default angle is posy = 0 degrees and negy = 180
+            Direction::Degrees0 => Position {
+                x: self.x,
+                y: self.y,
+            },
+            Direction::Degrees90 => Position {
+                x: -self.y,
+                y: self.x,
+            },
+            Direction::Degrees180 => Position {
+                x: -self.x,
+                y: -self.y,
+            },
+            Direction::Degrees270 => Position {
+                x: self.y,
+                y: -self.x,
+            },
+            Direction::None => panic!("direction should never be none in this application"),
+        }
+    }
+    pub fn real(self) -> PositionReal {
+        PositionReal {
+            x: self.x as f64,
+            y: self.y as f64,
+        }
+    }
+
 }
 
+impl core::ops::Add for Position {
+    type Output = Position;
+    fn add(self, other: Position) -> Position {
+        Position {
+            x: self.x + other.x,
+            y: self.y + other.y,
+        }
+    }
+}
+
+/// can be expressed as degrees relative to north (where north faces towards the top of the screen)
+/// none variant used for when the value is missing / no value is decided.
 #[derive(Clone, Debug, PartialEq)]
 pub enum Direction {
-    PosY,
-    NegY,
-    PosX,
-    NegX,
+    Degrees0,
+    Degrees180,
+    Degrees90,
+    Degrees270,
     None,
 }
 
 impl Direction {
     pub fn rev(&self) -> Direction {
         match self {
-            Direction::PosY => Direction::NegY,
-            Direction::NegY => Direction::PosY,
-            Direction::PosX => Direction::NegX,
-            Direction::NegX => Direction::PosX,
+            Direction::Degrees0 => Direction::Degrees180,
+            Direction::Degrees180 => Direction::Degrees0,
+            Direction::Degrees90 => Direction::Degrees270,
+            Direction::Degrees270 => Direction::Degrees90,
             Direction::None => Direction::None,
         }
     }
+}
+
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct PositionReal {
+    pub x: f64,
+    pub y: f64,
+}
+
+/// a point represented with x and y coordinates.
+impl PositionReal {
+
+    /// checks if the point is on a given line
+    pub fn touches_line(&self, line: &Line) -> bool {
+        match line {
+            Line::Vertical(y) => self.y as i64 == *y,
+            Line::Horizontal(x) => self.x as i64 == *x,
+        }
+    }
+
+    /// checks if two points are equal and returns the x and y equality result for each
+    pub fn aligns(&self, other: &PositionReal) -> (bool, bool) {
+        (self.x == other.x, self.y == other.y)
+    }
+
+    /// calculates x + y distance between two points
+    pub fn get_offset(&self, other: &PositionReal) -> PositionReal {
+        PositionReal {
+            x: other.x - self.x,
+            y: other.y - self.y
+        }
+    }
+
+    pub fn diagonal_distance(&self, other: &PositionReal) -> f64 {
+        sqrt((self.x - other.x)*(self.x - other.x) + (self.y - other.y)* (self.y - other.y) as f64)
+    }
+
+    pub fn as_usize(&self) -> (usize, usize) {
+        (self.x as usize, self.y as usize)
+    }
+
+    pub fn magnitude(&self) -> i64 {
+        let absx = if self.x >= 0.0 { self.x } else { -self.x };
+        let absy = if self.y >= 0.0 { self.y } else { -self.y };
+        (absx + absy) as i64
+
+    }
+
+    pub fn nearest(&self, points: &Vec<PositionReal>) -> PositionReal {
+
+        let mut points = points.clone();
+        points.sort_by_key(|p| {
+            let p = self.get_offset(p);
+            let absx = if p.x >= 0.0 { p.x } else { -p.x };
+            let absy = if p.y >= 0.0 { p.y } else { -p.y };
+            (absx + absy) as i64
+        });
+        points.first().unwrap().to_owned()
+    }
+
+
+    pub fn rotated_around(&self, angle: Direction, p: PositionReal) -> PositionReal { // rotates by an angle around a point
+
+        // gets coords relative to point to rotate around
+        let mut p_offset = self.get_offset(&p);
+
+        p_offset = match angle { // default angle is posy = 0 degrees and negy = 180
+            Direction::Degrees0 => PositionReal {
+                x: p_offset.x,
+                y: p_offset.y,
+            },
+            Direction::Degrees90 => PositionReal {
+                x: -p_offset.y,
+                y: p_offset.x,
+            },
+            Direction::Degrees180 => PositionReal {
+                x: -p_offset.x,
+                y: -p_offset.y,
+            },
+            Direction::Degrees270 => PositionReal {
+                x: p_offset.y,
+                y: -p_offset.x,
+            },
+            Direction::None => panic!("direction should never be none in this application"),
+        };
+
+        return p_offset + p;
+    }
+
+    pub fn rotate(&self, angle: Direction) -> PositionReal { // rotates by an angle around origin
+        match angle { // default angle is posy = 0 degrees and negy = 180
+            Direction::Degrees0 => PositionReal {
+                x: self.x,
+                y: self.y,
+            },
+            Direction::Degrees90 => PositionReal {
+                x: -self.y,
+                y: self.x,
+            },
+            Direction::Degrees180 => PositionReal {
+                x: -self.x,
+                y: -self.y,
+            },
+            Direction::Degrees270 => PositionReal {
+                x: self.y,
+                y: -self.x,
+            },
+            Direction::None => panic!("direction should never be none in this application"),
+        }
+    }
+    pub fn integer(self) -> Position {
+        Position {
+            x: self.x as i64,
+            y: self.y as i64,
+        }
+    }
+
+}
+
+impl core::ops::Add for PositionReal {
+    type Output = PositionReal;
+    fn add(self, other: PositionReal) -> PositionReal {
+        PositionReal {
+            x: self.x + other.x,
+            y: self.y + other.y,
+        }
+    }
 }