cannon components and systems

src/states/linear/components_cannon.rs

@@ -0,0 +1,46 @@
+use crate::states::linear::RoundBallType;
+use bevy::prelude::*;
+use std::mem;
+
+#[derive(Component)]
+pub struct LinearCannon;
+
+#[derive(Resource, Debug, Clone)]
+pub struct LinearCannonState {
+    pub shot: RoundBallType,
+    pub swap: RoundBallType,
+}
+
+impl Default for LinearCannonState {
+    fn default() -> Self {
+        Self {
+            shot: RoundBallType::random_from_4(),
+            swap: RoundBallType::random_from_4(),
+        }
+    }
+}
+
+impl LinearCannonState {
+    pub fn fire(&mut self) {
+        self.shot = self.swap;
+        self.swap = RoundBallType::random_from_4();
+    }
+
+    pub fn cycle(&mut self) {
+        mem::swap(&mut self.shot, &mut self.swap);
+    }
+}
+
+#[derive(Component)]
+pub struct RoundBallProjectile {
+    pub velocity: Vec2,
+    pub previous_position: Vec2,
+    pub ball_type: RoundBallType,
+}
+
+
+#[derive(Component)]
+pub struct ShotMarker;
+
+#[derive(Component)]
+pub struct SwapMarker;