Add ability to set a sprite's angle

src/lib.rs

@@ -82,6 +82,7 @@ impl Iterator for Events {
 pub struct Sprite {
     rect: Rect,
     surf: Surface<'static>,
+    angle: f64,
 }
 
 impl Sprite {
@@ -95,6 +96,7 @@ impl Sprite {
         Ok(Self {
             rect: dest_rect,
             surf,
+            angle: 0.0,
         })
     }
 
@@ -104,7 +106,7 @@ impl Sprite {
 
         canvas.fill_rect(None)?;
         canvas.clear();
-        canvas.copy_ex(&text, None, self.rect, 0.0, None, false, false)?;
+        canvas.copy_ex(&text, None, self.rect, self.angle, None, false, false)?;
 
         Ok(())
     }
@@ -116,6 +118,10 @@ impl Sprite {
         self.rect.set_x(new_x);
         self.rect.set_y(new_y);
     }
+
+    pub fn angle(&mut self, angle: f64) {
+        self.angle = angle;
+    }
 }
 
 pub struct Game {

src/main.rs

@@ -3,8 +3,11 @@ use catbox::{Event, Game, Keycode, Sprite};
 fn main() {
     let game = Game::new("catbox demo", 1000, 800);
 
+    let mut i = 0.0;
     let mut s = Sprite::new("duck.png", 500, 400).unwrap();
     game.run(|canvas, event_pump| {
+        i = (i + 1.0) % 360.0;
+
         for event in event_pump {
             match event {
                 Event::Quit { .. }
@@ -28,6 +31,7 @@ fn main() {
             }
         }
 
+        s.angle(i);
         s.draw(canvas).unwrap();
     })
     .unwrap();