screenspace coords was much easier than expected

src/canvas/canvas_frame.rs

@@ -11,7 +11,7 @@ use winit::event::Event;
 
 /// Trait which may be inherited by objects that wish to be drawn to the screen
 pub trait Drawable {
-    fn get(&self) -> Vec<VertexType>;
+    fn get(&self, window_size: (u32, u32)) -> Vec<VertexType>;
 }
 
 /// Trait which may be inherited by objects that wish to receive events
@@ -19,17 +19,29 @@ pub trait Eventable<T> {
     fn notify(&mut self, event: &Event<T>) -> ();
 }
 
+/// Trait which may be inherited by objects that wish to be updated
+pub trait Updatable {
+    fn update(&mut self, delta_time: f32) -> ();
+}
+
 /// Accumulator for Vectors of VertexTypes
 #[derive(Default)]
 pub struct CanvasFrame {
     pub map: Vec<VertexType>,
+    window_size: (u32, u32),
 }
 
 impl CanvasFrame {
 
+    pub fn new(window_size: (u32, u32)) -> CanvasFrame {
+        CanvasFrame {
+            map: vec![],
+            window_size: window_size,
+        }
+    }
     /// Push this drawable onto the back of the accumulator
     pub fn draw(&mut self, drawable: &dyn Drawable) {
-        for i in drawable.get() {
+        for i in drawable.get(self.window_size) {
             self.map.push(i);
         }
     }