basic refactoring

src/engine.rs

@@ -1,16 +1,10 @@
-const GAME_SIZE: (u32, u32) = (1200, 800);
-const BORDER_WIDTH: u32 = 10;
-const FG: u32 = 0xebdbb2;
-const BG: u32 = 0x282828;
+use self::objs::{obj_traits::MovingObject, World};
 use std::{
-    collections::HashMap,
     num::NonZeroU32,
     process,
     rc::Rc,
     time::{Duration, Instant},
 };
-
-use softbuffer::Buffer;
 use winit::{
     dpi::PhysicalSize,
     event::{Event, KeyEvent, StartCause, WindowEvent},
@@ -20,9 +14,16 @@ use winit::{
     window::WindowBuilder,
 };
 
-use self::objs::{MovingObject, World};
+pub mod objs;
+mod render;
+mod timer;
 
-type RenderFn = fn(&mut render::RenderCtx<'_, '_>, &mut World, &GameTimer);
+const GAME_SIZE: (u32, u32) = (1200, 800);
+const BORDER_WIDTH: u32 = 10;
+const FG: u32 = 0xebdbb2;
+const BG: u32 = 0x282828;
+
+type RenderFn = fn(&mut render::RenderCtx<'_, '_>, &mut World, &timer::GameTimer);
 // core game engine struct
 pub struct Engine {
     event_loop: EventLoop<()>,
@@ -70,7 +71,7 @@ impl Engine {
         let mut surface =
             softbuffer::Surface::new(&context, window.window_handle().unwrap()).unwrap();
 
-        let mut timer = GameTimer::new();
+        let mut timer = timer::GameTimer::new();
 
         event_loop
             .run(|event, elwt| {
@@ -132,7 +133,7 @@ impl Engine {
                                 (NonZeroU32::new(size.width), NonZeroU32::new(size.height))
                             } {
                                 surface.resize(width, height).unwrap();
-                                let mut buffer = surface.buffer_mut().unwrap();
+                                let buffer = surface.buffer_mut().unwrap();
 
                                 let mut ctx =
                                     render::RenderCtx::new(buffer, (width, height), GAME_SIZE);
@@ -175,216 +176,3 @@ impl Engine {
         process::exit(0);
     }
 }
-
-pub struct GameTimer {
-    game_start: Instant,
-    last_frame: Instant,
-    stopwatches: HashMap<String, Instant>,
-}
-
-impl GameTimer {
-    pub fn new() -> Self {
-        Self {
-            game_start: Instant::now(),
-            last_frame: Instant::now(),
-            stopwatches: HashMap::new(),
-        }
-    }
-
-    pub fn frame_update(&mut self) {
-        self.last_frame = Instant::now()
-    }
-
-    pub fn delta_t(&self) -> f32 {
-        Instant::now().duration_since(self.last_frame).as_secs_f32()
-    }
-
-    pub fn game_time_passed(&self) -> f32 {
-        Instant::now().duration_since(self.game_start).as_secs_f32()
-    }
-
-    pub fn start_stopwatch(&mut self, name: impl ToString) {
-        let _ = self.stopwatches.insert(name.to_string(), Instant::now());
-    }
-
-    pub fn get_stopwatch_time(&self, name: &str) -> Option<f32> {
-        self.stopwatches
-            .get(name)
-            .map(|start_time| Instant::now().duration_since(*start_time).as_secs_f32())
-    }
-
-    pub fn delete_stopwatch(&mut self, name: &str) {
-        let _ = self.stopwatches.remove(name);
-    }
-}
-
-mod render;
-
-pub mod objs {
-    use std::rc::Rc;
-
-    use super::{render::RenderCtx, BG, FG};
-
-    pub struct World {
-        objects: Vec<Rc<dyn MovingObject>>,
-    }
-
-    impl World {
-        pub fn new() -> Self {
-            Self {
-                objects: Vec::new(),
-            }
-        }
-
-        pub fn insert(&mut self, obj: Rc<dyn MovingObject>) -> usize {
-            self.objects.push(obj);
-            self.objects.len() - 1
-        }
-
-        pub fn get(&self, i: usize) -> Rc<dyn MovingObject> {
-            self.objects[i].clone()
-        }
-
-        pub fn get_mut(&mut self, i: usize) -> &mut Rc<dyn MovingObject> {
-            &mut self.objects[i]
-        }
-
-        pub fn draw_all(&self, ctx: &mut RenderCtx<'_, '_>) {
-            self.objects.iter().for_each(|obj| obj.display(ctx))
-        }
-    }
-
-    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
-    pub struct Rect {
-        pos: Position,
-        size: Size,
-    }
-
-    impl Rect {
-        pub fn new(x: u32, y: u32, height: u32, width: u32) -> Self {
-            Self {
-                pos: Position::new(x, y),
-                size: Size::new(width, height),
-            }
-        }
-
-        pub fn square(x: u32, y: u32, size: u32) -> Self {
-            Self {
-                pos: Position::new(x, y),
-                size: Size::new(size, size),
-            }
-        }
-    }
-
-    impl Object for Rect {
-        fn position(&self) -> Position {
-            self.pos
-        }
-
-        fn size(&self) -> Size {
-            self.size
-        }
-    }
-
-    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
-    pub struct MovingRect {
-        prev_pos: Position,
-        current: Rect,
-    }
-
-    impl MovingRect {
-        pub fn new(x: u32, y: u32, height: u32, width: u32) -> Self {
-            Self {
-                prev_pos: Position::new(x, y),
-                current: Rect::new(x, y, height, width),
-            }
-        }
-
-        pub fn square(x: u32, y: u32, size: u32) -> Self {
-            Self {
-                prev_pos: Position::new(x, y),
-                current: Rect::square(x, y, size),
-            }
-        }
-    }
-
-    impl Object for MovingRect {
-        fn position(&self) -> Position {
-            self.current.position()
-        }
-
-        fn size(&self) -> Size {
-            self.current.size()
-        }
-    }
-
-    impl MovingObject for MovingRect {
-        fn previous_pos(&self) -> Position {
-            self.prev_pos
-        }
-
-        fn update_pos(&mut self, x: u32, y: u32) {
-            self.prev_pos = self.current.pos;
-            self.current.pos = Position::new(x, y);
-        }
-    }
-
-    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
-    pub struct Position {
-        x: u32,
-        y: u32,
-    }
-
-    impl Position {
-        pub fn new(x: u32, y: u32) -> Self {
-            Self { x, y }
-        }
-    }
-
-    #[derive(Clone, Copy, Debug, Eq, PartialEq)]
-    pub struct Size {
-        width: u32,
-        height: u32,
-    }
-
-    impl Size {
-        pub fn new(width: u32, height: u32) -> Self {
-            Self { width, height }
-        }
-    }
-
-    pub trait Object {
-        fn position(&self) -> Position;
-        fn size(&self) -> Size;
-        fn display(&self, ctx: &mut RenderCtx<'_, '_>) {
-            let Position { x, y } = self.position();
-            let Size { width, height } = self.size();
-            ctx.rect(x, y, width, height, FG);
-        }
-    }
-
-    pub trait MovingObject: Object {
-        fn previous_pos(&self) -> Position;
-        fn update_pos(&mut self, x: u32, y: u32);
-        fn move_obj(&mut self, x: i32, y: i32) {
-            let Position { x: cur_x, y: cur_y } = self.position();
-
-            self.update_pos(
-                cur_x.saturating_add_signed(x),
-                cur_y.saturating_add_signed(y),
-            )
-        }
-
-        // TODO: damage
-        fn draw_move(&self, ctx: &mut RenderCtx<'_, '_>) {
-            let Position {
-                x: prev_x,
-                y: prev_y,
-            } = self.previous_pos();
-            let Size { width, height } = self.size();
-
-            ctx.rect(prev_x, prev_y, width, height, BG);
-            self.display(ctx);
-        }
-    }
-}

src/engine/objs.rs

@@ -0,0 +1,38 @@
+use std::rc::Rc;
+
+use self::obj_traits::MovingObject;
+
+use super::{render::RenderCtx, BG, FG};
+
+pub mod geometry;
+pub mod obj_traits;
+pub mod primitive_shapes;
+
+pub struct World {
+    objects: Vec<Rc<dyn MovingObject>>,
+}
+
+impl World {
+    pub fn new() -> Self {
+        Self {
+            objects: Vec::new(),
+        }
+    }
+
+    pub fn insert(&mut self, obj: Rc<dyn MovingObject>) -> usize {
+        self.objects.push(obj);
+        self.objects.len() - 1
+    }
+
+    pub fn get(&self, i: usize) -> Rc<dyn MovingObject> {
+        self.objects[i].clone()
+    }
+
+    pub fn get_mut(&mut self, i: usize) -> &mut Rc<dyn MovingObject> {
+        &mut self.objects[i]
+    }
+
+    pub fn draw_all(&self, ctx: &mut RenderCtx<'_, '_>) {
+        self.objects.iter().for_each(|obj| obj.display(ctx))
+    }
+}

src/engine/objs/geometry.rs

@@ -0,0 +1,22 @@
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct Position {
+    pub x: u32,
+    pub y: u32,
+}
+
+impl Position {
+    pub fn new(x: u32, y: u32) -> Self {
+        Self { x, y }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct Size {
+    pub width: u32,
+    pub height: u32,
+}
+impl Size {
+    pub fn new(width: u32, height: u32) -> Self {
+        Self { width, height }
+    }
+}

src/engine/objs/obj_traits.rs

@@ -0,0 +1,38 @@
+use crate::engine::{render::RenderCtx, BG, FG};
+
+use super::geometry::{Position, Size};
+
+pub trait Object {
+    fn position(&self) -> Position;
+    fn size(&self) -> Size;
+    fn display(&self, ctx: &mut RenderCtx<'_, '_>) {
+        let Position { x, y } = self.position();
+        let Size { width, height } = self.size();
+        ctx.rect(x, y, width, height, FG);
+    }
+}
+
+pub trait MovingObject: Object {
+    fn previous_pos(&self) -> Position;
+    fn update_pos(&mut self, x: u32, y: u32);
+    fn move_obj(&mut self, x: i32, y: i32) {
+        let Position { x: cur_x, y: cur_y } = self.position();
+
+        self.update_pos(
+            cur_x.saturating_add_signed(x),
+            cur_y.saturating_add_signed(y),
+        )
+    }
+
+    // TODO: damage
+    fn draw_move(&self, ctx: &mut RenderCtx<'_, '_>) {
+        let Position {
+            x: prev_x,
+            y: prev_y,
+        } = self.previous_pos();
+        let Size { width, height } = self.size();
+
+        ctx.rect(prev_x, prev_y, width, height, BG);
+        self.display(ctx);
+    }
+}

src/engine/objs/primitive_shapes.rs

@@ -0,0 +1,79 @@
+use super::{
+    geometry::{Position, Size},
+    obj_traits::{MovingObject, Object},
+};
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct Rect {
+    pos: Position,
+    size: Size,
+}
+
+impl Rect {
+    pub fn new(x: u32, y: u32, height: u32, width: u32) -> Self {
+        Self {
+            pos: Position::new(x, y),
+            size: Size::new(width, height),
+        }
+    }
+
+    pub fn square(x: u32, y: u32, size: u32) -> Self {
+        Self {
+            pos: Position::new(x, y),
+            size: Size::new(size, size),
+        }
+    }
+}
+
+impl Object for Rect {
+    fn position(&self) -> Position {
+        self.pos
+    }
+
+    fn size(&self) -> Size {
+        self.size
+    }
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct MovingRect {
+    prev_pos: Position,
+    current: Rect,
+}
+
+impl MovingRect {
+    pub fn new(x: u32, y: u32, height: u32, width: u32) -> Self {
+        Self {
+            prev_pos: Position::new(x, y),
+            current: Rect::new(x, y, height, width),
+        }
+    }
+
+    pub fn square(x: u32, y: u32, size: u32) -> Self {
+        Self {
+            prev_pos: Position::new(x, y),
+            current: Rect::square(x, y, size),
+        }
+    }
+}
+
+impl Object for MovingRect {
+    fn position(&self) -> Position {
+        self.current.position()
+    }
+
+    fn size(&self) -> Size {
+        self.current.size()
+    }
+}
+
+impl MovingObject for MovingRect {
+    fn previous_pos(&self) -> Position {
+        self.prev_pos
+    }
+
+    fn update_pos(&mut self, x: u32, y: u32) {
+        self.prev_pos = self.current.pos;
+        self.current.pos = Position::new(x, y);
+    }
+}

src/engine/render.rs

@@ -6,8 +6,6 @@ use winit::raw_window_handle::DisplayHandle;
 
 use softbuffer::Buffer;
 
-use super::objs::Object;
-
 // render context
 pub struct RenderCtx<'buf, 'win> {
     pub(crate) buffer: Buffer<'buf, DisplayHandle<'win>, WindowHandle<'win>>,
@@ -58,6 +56,9 @@ impl<'buf, 'win> RenderCtx<'buf, 'win> {
         }
     }
 
+    /// draw a rectangle in a context
+    ///
+    /// this method limits overflows etc
     pub fn rect(&mut self, x: u32, y: u32, width: u32, height: u32, color: u32) {
         if x >= self.context_size.0 || y >= self.context_size.1 || width == 0 || height == 0 {
         } else {

src/engine/timer.rs

@@ -0,0 +1,45 @@
+use std::collections::HashMap;
+
+use std::time::Instant;
+
+pub struct GameTimer {
+    pub(crate) game_start: Instant,
+    pub(crate) last_frame: Instant,
+    pub(crate) stopwatches: HashMap<String, Instant>,
+}
+
+impl GameTimer {
+    pub fn new() -> Self {
+        Self {
+            game_start: Instant::now(),
+            last_frame: Instant::now(),
+            stopwatches: HashMap::new(),
+        }
+    }
+
+    pub fn frame_update(&mut self) {
+        self.last_frame = Instant::now()
+    }
+
+    pub fn delta_t(&self) -> f32 {
+        Instant::now().duration_since(self.last_frame).as_secs_f32()
+    }
+
+    pub fn game_time_passed(&self) -> f32 {
+        Instant::now().duration_since(self.game_start).as_secs_f32()
+    }
+
+    pub fn start_stopwatch(&mut self, name: impl ToString) {
+        let _ = self.stopwatches.insert(name.to_string(), Instant::now());
+    }
+
+    pub fn get_stopwatch_time(&self, name: &str) -> Option<f32> {
+        self.stopwatches
+            .get(name)
+            .map(|start_time| Instant::now().duration_since(*start_time).as_secs_f32())
+    }
+
+    pub fn delete_stopwatch(&mut self, name: &str) {
+        let _ = self.stopwatches.remove(name);
+    }
+}

src/main.rs

@@ -1,9 +1,6 @@
 use std::rc::Rc;
 
-use engine::{
-    objs::{MovingRect, Object, Rect},
-    Engine,
-};
+use engine::Engine;
 
 fn main() {
     let mut engine = Engine::new();