Added view

assets/levels/level1.txt

@@ -1,31 +1,15 @@
-30 50
+14 24
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assets/levels/level2.txt

@@ -0,0 +1,31 @@
+30 50
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src/app/game.rs

@@ -15,7 +15,7 @@ use rusty::engine::renderer::Renderer;
 
 fn main() {
     let game_width = 800;
-    let game_height = 600;
+    let game_height = 450;
 
     let mut character = Character::with_controls(Controls::new());
     character.set_position((10.0, 0.0));
@@ -54,6 +54,11 @@ fn main() {
 
         scene.update(&duration);
 
+        // Update the view
+        if let Some(view) = scene.view() {
+            renderer.set_view(&view);
+        }
+
         // Do the rendering
         renderer.clear();
         renderer.draw_scene(&scene);

src/engine/character/mod.rs

@@ -5,8 +5,11 @@ use std::time::{
 
 use sfml::system::Vector2;
 use sfml::window::Event;
-use sfml::graphics::IntRect;
 use sfml::window::Key;
+use sfml::graphics::{
+    IntRect,
+    View,
+};
 
 use engine::scene::Updatable;
 use engine::controls::Controls;
@@ -133,6 +136,16 @@ impl Character {
         }
     }
 
+    /// Returns a reference to the controls.
+    pub fn controls(&self) -> &Option<Controls> {
+        &self.controls
+    }
+
+    /// Returns a view that looks at the character.
+    pub fn view(&self) -> View {
+        View::new(self.position, Vector2::new(24.0 * 16.0, 24.0 * 9.0))
+    }
+
 }
 
 impl Updatable for Character {

src/engine/renderer/mod.rs

@@ -6,6 +6,7 @@ use sfml::graphics::{
     Sprite,
     Color,
     IntRect,
+    View,
 };
 
 use sfml::window::{
@@ -92,6 +93,11 @@ impl Renderer {
         self.window.draw(&sprite);
     }
 
+    /// Updates the view.
+    pub fn set_view(&mut self, view: &View) {
+        self.window.set_view(&view);
+    }
+
     /// Draws a scene on the window.
     pub fn draw_scene(&mut self, scene: &Scene) {
         let map = scene.map();

src/engine/scene/mod.rs

@@ -1,6 +1,7 @@
 use std::time::Duration;
 
 use sfml::window::Event;
+use sfml::graphics::View;
 
 use engine::character::Character;
 use engine::map::Map;
@@ -31,6 +32,45 @@ impl Scene {
         self.characters.push(character);
     }
 
+    /// Returns the controlable.
+    fn controlable(&self) -> Option<&Character> {
+        for character in &self.characters {
+            if character.controls().is_some() {
+                return Some(&character)
+            }
+        }
+        None
+    }
+
+    /// Returns the right view.
+    pub fn view(&self) -> Option<View> {
+        let view = self.controlable()?.view();
+        let mut center = view.center();
+        let size = view.size();
+
+        // Clamp center so that the view doesn't show things outside the level.
+        if center.x - size.x / 2.0 < 0.0 {
+            center.x = size.x / 2.0;
+        }
+
+        if center.y - size.y / 2.0 < 0.0 {
+            center.y = size.y / 2.0;
+        }
+
+        let right_limit = self.map.cols() as f32 * 16.0;
+        let bottom_limit = self.map.rows() as f32 * 16.0;
+
+        if center.x + size.x / 2.0 > right_limit {
+            center.x = right_limit - size.x / 2.0;
+        }
+
+        if center.y + size.y / 2.0 > bottom_limit {
+            center.y = bottom_limit - size.y / 2.0;
+        }
+
+        Some(View::new(center, size))
+    }
+
     /// Updates the whole scene.
     pub fn update(&mut self, duration: &Duration) {