Collisions with border of level, death

src/app/game.rs

@@ -8,7 +8,7 @@ use rusty::engine::character::Character;
 use rusty::engine::controls::Controls;
 use rusty::engine::renderer::Renderer;
 use rusty::engine::map::Map;
-use rusty::engine::scene::Scene;
+use rusty::engine::scene::{Scene, State};
 
 fn parse_resolution(res: &str) -> Result<(u32, u32), String> {
     let split = res.split('x').collect::<Vec<_>>();
@@ -99,7 +99,9 @@ fn main() {
         let duration = Instant::now().duration_since(after_loop);
         after_loop = Instant::now();
 
-        scene.update(&duration);
+        if scene.update(&duration) == State::Finished {
+            running = false;
+        }
 
         // Update the view
         if let Some(view) = scene.view() {

src/engine/character/mod.rs

@@ -20,6 +20,19 @@ pub enum Side {
     Right,
 }
 
+/// This enum represents the type of damages that the character can get.
+#[derive(Copy, Clone)]
+pub enum Damage {
+    /// No damage were made
+    None,
+
+    /// A single point of life has been taken from the character.
+    One,
+
+    /// The character died.
+    Death,
+}
+
 impl Side {
     /// Returns the side corresponding to the force.
     ///
@@ -57,6 +70,9 @@ pub struct Character {
     /// The side of the character.
     side: Side,
 
+    /// The number of hp of the character.
+    hp: u32,
+
     /// The counter of jumps.
     ///
     /// When it's 0, the character can no longer jump.
@@ -82,6 +98,7 @@ impl Character {
             speed: Vector2::new(0.0, 0.0),
             controls,
             side: Side::Right,
+            hp: 1,
             jump_counter: 1,
             max_jump: 1,
             animation_timer: None,
@@ -138,6 +155,30 @@ impl Character {
     pub fn bbox(&self) -> FloatRect {
         FloatRect::new(self.position.x + 8.0, self.position.y + 16.0, 16.0, 16.0)
     }
+
+    /// Returns the number of hp of the character.
+    pub fn hp(&self) -> u32 {
+        self.hp
+    }
+
+    /// Returns true if the character is alive.
+    pub fn is_alive(&self) -> bool {
+        self.hp > 0
+    }
+
+    /// Returns true if the character is dead.
+    pub fn is_dead(&self) -> bool {
+        self.hp == 0
+    }
+
+    /// Takes the corresponding damage.
+    pub fn take_damage(&mut self, damage: Damage) {
+        match damage {
+            Damage::None => (),
+            Damage::One => self.hp -= 1,
+            Damage::Death => self.hp = 0,
+        }
+    }
 }
 
 impl Updatable for Character {

src/engine/map/mod.rs

@@ -13,6 +13,7 @@ use crate::{Error, Result};
 use crate::engine::math::{clamp, Matrix};
 use crate::engine::renderer::Drawable;
 use crate::engine::texture::Texture;
+use crate::engine::character::Damage;
 
 /// This enum represents if the collision happens on the X axis or the Y axis.
 #[derive(Copy, Clone)]
@@ -436,7 +437,10 @@ impl Map {
         &self,
         old: FloatRect,
         new: FloatRect,
-    ) -> Option<(CollisionAxis, Vector2<f32>)> {
+    ) -> Option<(CollisionAxis, Vector2<f32>, Damage)> {
+
+        let mut damage = Damage::None;
+
         let cols = self.tiles.cols() - 1;
         let rows = self.tiles.rows() - 1;
 
@@ -511,11 +515,30 @@ impl Map {
             }
         }
 
+        // Collision between the player and left border of the level
+        if new.left < 0.0 {
+            new.left = 0.0;
+            collision_x = true;
+        }
+
+        // Collision between the player and right border of the level
+        if new.left > cols as f32 * 16.0 {
+            new.left = cols as f32 * 16.0;
+            collision_x = true;
+        }
+
+        // Collision between the player and the void
+        if new.top > self.tiles.rows() as f32 * 16.0 {
+            new.top = self.tiles.rows() as f32 * 16.0;
+            collision_y = true;
+            damage = Damage::Death;
+        }
+
         let new_pos = Vector2::new(new.left, new.top);
         match (collision_x, collision_y) {
-            (true, true) => Some((CollisionAxis::Both, new_pos)),
-            (true, false) => Some((CollisionAxis::X, new_pos)),
-            (false, true) => Some((CollisionAxis::Y, new_pos)),
+            (true, true) => Some((CollisionAxis::Both, new_pos, damage)),
+            (true, false) => Some((CollisionAxis::X, new_pos, damage)),
+            (false, true) => Some((CollisionAxis::Y, new_pos, damage)),
             (false, false) => None,
         }
     }

src/engine/scene/mod.rs

@@ -16,6 +16,16 @@ pub struct Scene {
     map: Map,
 }
 
+/// The type used to represent whether a a scene is running or finished.
+#[derive(Copy, Clone, PartialEq, Eq)]
+pub enum State {
+    /// The scene is running.
+    Running,
+
+    /// The scene is finished.
+    Finished,
+}
+
 impl Scene {
     /// Creates a scene from a map level.
     pub fn from_map(map: Map) -> Scene {
@@ -74,7 +84,10 @@ impl Scene {
     }
 
     /// Updates the whole scene.
-    pub fn update(&mut self, duration: &Duration) {
+    pub fn update(&mut self, duration: &Duration) -> State {
+
+        let mut state = State::Finished;
+
         for c in &mut self.characters {
             let old = c.bbox();
 
@@ -83,7 +96,7 @@ impl Scene {
 
             c.update(duration);
 
-            if let Some((axis, position)) = self.map.collides_bbox(old, c.bbox()) {
+            if let Some((axis, position, damage)) = self.map.collides_bbox(old, c.bbox()) {
                 c.position = position - offset;
                 if axis.is_x() {
                     c.speed.x = 0.0;
@@ -92,12 +105,21 @@ impl Scene {
                     c.speed.y = 0.0;
                     c.ground_collision();
                 }
+
+                c.take_damage(damage);
+
             } else {
                 c.fall_off();
             }
+
+            if c.controls().is_some() && c.is_alive() {
+                state = State::Running;
             }
         }
 
+        state
+    }
+
     /// Transfers an event to the elements contained in the scene that should receive events.
     pub fn manage_event(&mut self, event: &Event) {
         for c in &mut self.characters {