Setup game controller status on game state.

.ignore

@@ -0,0 +1,3 @@
+out/
+assets/
+gamecontrollerdb.txt

README.md

@@ -1,3 +1,86 @@
-# pong_raylib
+# PONG 2026
 
-Classic pong implemented in Odin and Raylib
+A deliberately over engineered Pong clone in [Odin](https://odin-lang.org) with [raylib](https://www.raylib.com).
+
+Retro line-based graphics with a CRT post-processing shader.
+
+## Screenshots
+
+![Main menu](screenshots/main_menu.png)
+
+![Settings menu](screenshots/settings_menu.png)
+
+![Gameplay](screenshots/gameplay.png)
+
+## Why Over-Engineered?
+
+While the game could have been done in a single file, the goal was to structure the project like a small production game instead:
+
+- **Manager-per-subsystem**: audio, input, event, level, particle, and scene managers, each in its own file
+- **Event system**: decoupled communication between systems (`event_manager.odin`) instead of direct calls
+- **Scene management**: state/scene stack for menus, gameplay, etc. (`scene_manager.odin`)
+- **Entity layer**: shared base entity with ball, player, and opponent specializations
+- **Input abstraction**: keyboard and gamepad behind one interface
+- **Data-driven assets**: audio and shaders loaded from `assets/`, not embedded
+
+The idea behind breaking it into systems is so that it can help build my foundations into more complex games.
+
+## Features
+
+- Single-player vs AI opponent
+- CRT fragment shader (`assets/shaders/crt.fs`)
+- Particle effects, sound effects, music
+- Gamepad support via SDL controller mappings
+
+## Controls
+
+| Action | Keyboard | Gamepad |
+|--------|----------|---------|
+| Move   | W(up) S(down)   | Left Joystick  |
+| Select | Enter   | A button  |
+| Pause  | Spacebar   | Start button  |
+
+## Requirements
+
+Please note, I have not built this on MacOs or Windows, only linux.
+While in theory if you have the odin compiler it should just work as there is no external libs besides those bundled with Odin.
+
+- Odin compiler (version dev-2026-10:e87445a58)
+- raylib (bundled with Odin as `vendor:raylib`)
+- GPU/driver with OpenGL 3.3 support (shader uses `#version 330`)
+
+## Build & Run
+
+    ./build.sh          # see build.sh for flags and options
+    ./out/pong
+
+## Project Layout
+
+    assets/
+      audio/            music, SFX, UI sounds
+      shaders/          crt.fs
+    screenshots/        README images
+    src/
+      main.odin         entry point
+      game.odin         game state and loop
+      *_manager.odin    audio, event, input, level, particle, scene
+      entity*.odin      base entity, ball, player, opponent
+    out/                build output
+    build.sh            build script
+
+## Credits
+Sourced from the web, not mine.
+| File | Title | Author | Source | License |
+|------|-------|--------|--------|---------|
+| `UI, gameplay effects` | Impact Sounds 1.0 + Interface Sounds 1.0 | Kenney | https://www.kenney.nl | [CC0 1.0](http://creativecommons.org/publicdomain/zero/1.0/) |
+| `Background Music` | 5 Action Chiptunes By Juhani Junkala | Juhani Junkala | <download page URL> | CC0 1.0 |
+
+
+### Third-Party
+- `gamecontrollerdb.txt`: [SDL_GameControllerDB](https://github.com/mdqinc/SDL_GameControllerDB) (zlib)
+- [raylib](https://github.com/raysan5/raylib) by Ramon Santamaria (@raysan5), zlib
+- [Odin](https://github.com/odin-lang/Odin), BSD-3-Clause
+
+## License
+MIT, see [LICENSE](LICENSE).
+Any third-party assets retain their original licenses, listed above.

assets/shaders/crt.fs

@@ -0,0 +1,48 @@
+#version 330
+
+in vec2 fragTexCoord;
+in vec4 fragColor;
+
+out vec4 finalColor;
+
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+
+// Adjust these values to tweak the aesthetic:
+const float SCANLINE_INTENSITY = 0.25; // Lower value = softer lines (0.08 to 0.20)
+const float BLOOM_AMOUNT       = 0.10; // Slight phosphor bleed/glow
+const float CRT_CURVATURE      = 0.03; // Subtle screen bulge (0.0 = flat)
+
+void main() {
+    // 1. Subtle screen curvature distortion
+    vec2 uv = fragTexCoord;
+    vec2 dc = abs(0.5 - uv);
+    uv.x += uv.x * (dc.y * dc.y) * CRT_CURVATURE;
+    uv.y += uv.y * (dc.x * dc.x) * CRT_CURVATURE;
+
+    // Discard pixels outside the curved screen bounds
+    if (uv.x < 0.0 || uv.x > 1.0 || uv.y < 0.0 || uv.y > 1.0) {
+        finalColor = vec4(0.0, 0.0, 0.0, 1.0);
+        return;
+    }
+
+    // 2. Sample pixel with slight horizontal blur (Phosphor bleed)
+    vec4 col = texture(texture0, uv);
+    vec4 col_left  = texture(texture0, uv - vec2(0.0008, 0.0));
+    vec4 col_right = texture(texture0, uv + vec2(0.0008, 0.0));
+    col.rgb = mix(col.rgb, (col_left.rgb + col_right.rgb) * 0.5, BLOOM_AMOUNT);
+
+    // 3. Gaussian scanline profile matching 360 vertical lines
+    float scanline = sin(uv.y * 360.0 * 3.14159);
+    // Smooth power curve prevents harsh pitch-black cutoffs
+    float scanline_factor = pow(0.5 + 0.5 * scanline, 1.8); 
+
+    // Apply scanlines smoothly
+    col.rgb *= mix(1.0 - SCANLINE_INTENSITY, 1.0, scanline_factor);
+
+    // 4. Subtle corner vignette
+    float vig = (16.0 * uv.x * uv.y * (1.0 - uv.x) * (1.0 - uv.y));
+    col.rgb *= pow(vig, 0.05);
+
+    finalColor = col * colDiffuse * fragColor;
+}

src/audio_manager.odin

@@ -20,7 +20,7 @@ Sound_ID :: enum {
 Audio_Manager :: struct {
     sounds:            map[Sound_ID]rl.Sound,
     music:             rl.Music,
-    music_loaded:      bool,
+    music_loaded:      bool,    //
 
     sfx_vol:           f32, // User SFX volume setting
     user_music_vol:    f32, // User Music volume setting
@@ -40,13 +40,13 @@ audio_init :: proc(audio: ^Audio_Manager) {
 	audio.sounds = make(map[Sound_ID]rl.Sound)
 
 	// Load SFX
-    audio.sfx_vol = 0.3
+    audio.sfx_vol = 0.4
 	audio.sounds[.UI_Select] = rl.LoadSound("assets/audio/ui/select.ogg")
 	audio.sounds[.Ball_Collision]  = rl.LoadSound("assets/audio/gameplay/ballhit.ogg")
 
 	// Load Music Stream
-    audio.user_music_vol = 0.1
-    audio.current_music_vol = 0.1
+    audio.user_music_vol = 0.4
+    audio.current_music_vol = 0.4
     audio.fade_state = .None
     audio.music = rl.LoadMusicStream("assets/audio/gameplay/music/track_1.wav")
     audio.music_loaded = true

src/entity_ball.odin

@@ -6,14 +6,16 @@ import rl "vendor:raylib"
 
 SPEED_INC :: 30
 EFFECTS_SPEED :: 300
+INITIAL_SPEED :: 200
+MAX_SPEED :: 550
 
 init_ball :: proc() -> Entity {
 	return Entity{
 		type   = .Ball,
 		active = true,
 		pos	   = rl.Vector2{(VIEWPORT_W / 2), (VIEWPORT_H / 2)},
-		speed  = 200,
-        max_speed = 550,
+		speed  = INITIAL_SPEED,
+        max_speed = MAX_SPEED,
 		vel    = rl.Vector2{0,0},
 		shape  = .Circle,
 		size = rl.Vector2{8, 0},
@@ -35,7 +37,7 @@ serve_ball :: proc(ball: ^Entity, serve_dir: u8) {
 reset_ball :: proc(ball: ^Entity) {
     ball.pos = rl.Vector2{(VIEWPORT_W / 2), (VIEWPORT_H / 2)}
     ball.vel = rl.Vector2{0,0}
-    ball.speed  = 300
+    ball.speed  = INITIAL_SPEED
     ball.trail_positions = {}
     ball.trail_count = 0
 }
@@ -118,6 +120,7 @@ check_ball_paddle_collision :: proc(ball: ^Entity, paddle: Entity) -> bool {
 }
 
 increment_score :: proc(score_side: ^int, max_score: int, player: bool, ball: ^Entity) {
+	emit_event(.Score_Change)
     score_side^ += 1
     if score_side^ == max_score {
         emit_event(Game_Over_Data{player})

src/event_manager.odin

@@ -58,21 +58,13 @@ process_events :: proc(game: ^Game) {
             push_scene(game, make_game_over_overlay(e.winner_is_player))
 
         case Ball_Collision_Data:
-            // normalize the speed between 0.0 -> 1.0
-            // map that value to the camera displacement
-            min_speed: f32 = 200.0
-            max_speed: f32 = 550.0
-            speed_factor := clamp((e.speed - min_speed) / (max_speed - min_speed), 0, 1.0)
-
-            intensity := 0.5 + (speed_factor * 4.5) 
-            game_trigger_shake(game, intensity, duration = 0.15)
-
             audio_play_sfx(&game.audio, .Ball_Collision)            
 
         case Simple_Event:
             #partial switch e {
             case .Game_Start:
                 set_root_scene(game, make_gameplay_scene())
+    			game.transition = {true, 0, 0.2}
                 audio_fade_in(&game.audio, duration = 1.5)
 
             case .Game_Pause:
@@ -81,6 +73,9 @@ process_events :: proc(game: ^Game) {
             case .Game_Resume:
                 pop_scene(game)
 
+            case .Score_Change:
+            	game_trigger_shake(game, 10, duration = 0.20)
+
             case .Game_Settings:
                 parent: Maybe(Scene_Type) = nil
                 if active := get_active_scene(game); active != nil {
@@ -92,6 +87,7 @@ process_events :: proc(game: ^Game) {
 
             case .Game_Main_Menu:
                 set_root_scene(game, make_main_menu())
+    			game.transition = {true, 0, 0.3}
                 audio_fade_out(&game.audio, duration = 1.0)
             
             case .Game_Back:

src/game.odin

@@ -6,7 +6,7 @@ import rl "vendor:raylib"
 
 VIEWPORT_W   :: 640
 VIEWPORT_H   :: 360
-WINDOW_TITLE :: "Pong"
+WINDOW_TITLE :: "PONG 2026"
 
 Resolution :: struct {
     width:  i32,
@@ -16,16 +16,27 @@ Resolution :: struct {
 
 // Preset window dimensions
 RESOLUTIONS := [?]Resolution{
+	{0, 0, "Fullscreen"},
+    {1024, 768, "1024x768"},
     {1280, 720, "1280x720"},
+	{1366, 768, "1366x768"},
+	{1600, 900, "1600x900"}, 
     {1920, 1080, "1920x1080"},
     {2560, 1440, "2560x1440"},
     {3840, 2160, "3840x2160"},
 }
 
+Transition :: struct {
+	active: bool, 
+    elapsed:  f32,
+    duration: f32,
+}
+
 Game :: struct {
     viewport:     rl.RenderTexture2D,
     bg_texture:   rl.Texture2D, 
     crt_shader:   rl.Shader,
+    transition:   Transition,
     scene_stack:  [dynamic]Scene,
     should_close: bool,
     audio:        Audio_Manager,
@@ -38,7 +49,11 @@ Game :: struct {
     // resolution state
     window_w: i32,
     window_h: i32,
-    res_index: int
+    res_index: int,
+
+    // Controller state.
+    controller_gid: i32,
+    controller_connected: bool,
 }
 
 // AO: lets me load this at compile time!
@@ -48,14 +63,18 @@ gamepad_compat := #load("../gamecontrollerdb.txt", string)
 // Game Lifecycle
 // ------------------------------------------------------------------------------
 game_init :: proc(game: ^Game) {
-    rl.SetConfigFlags({.WINDOW_ALWAYS_RUN, .MSAA_4X_HINT})
-    game.res_index = 2
+    rl.SetConfigFlags({.WINDOW_ALWAYS_RUN, .MSAA_4X_HINT, .WINDOW_RESIZABLE})
+    game.controller_gid = -1
+    game.res_index = 0
     game.window_w  = RESOLUTIONS[game.res_index].width
     game.window_h  = RESOLUTIONS[game.res_index].height
 
     rl.InitWindow(game.window_w, game.window_h, WINDOW_TITLE)
     rl.SetTargetFPS(60)
     rl.SetExitKey(.KEY_NULL)
+	rl.HideCursor()
+
+	game_set_resolution(game, game.res_index)
 
     gamepad_cstr := strings.clone_to_cstring(gamepad_compat)
     defer delete(gamepad_cstr)
@@ -79,9 +98,14 @@ game_init :: proc(game: ^Game) {
     bg_img    := rl.GenImageGradientRadial(VIEWPORT_W, VIEWPORT_H, 0.3, bg_center, bg_corner)
     game.bg_texture = rl.LoadTextureFromImage(bg_img)
     rl.UnloadImage(bg_img) // Free CPU memory
-
     game.crt_shader = rl.LoadShader(nil, "assets/shaders/crt.fs")
 
+    // some ray gui color updates for now
+	rl.GuiSetStyle(.SLIDER, i32(rl.GuiControlProperty.BASE_COLOR_NORMAL), 0x00000000)
+	rl.GuiSetStyle(.SLIDER, i32(rl.GuiControlProperty.BORDER_WIDTH), 0x00000000)
+    rl.GuiSetStyle(.SLIDER, i32(rl.GuiControlProperty.BASE_COLOR_PRESSED), 0x66BFFFFF)
+    rl.GuiSetStyle(.SLIDER, i32(rl.GuiControlProperty.TEXT_COLOR_FOCUSED), 0x66BFFFFF)
+
     // Setup 2D camera matching the 640x360 viewport center
     game.camera = rl.Camera2D{
         target   = rl.Vector2{VIEWPORT_W / 2.0, VIEWPORT_H / 2.0},
@@ -90,13 +114,14 @@ game_init :: proc(game: ^Game) {
         zoom     = 1.0,
     }
 
+    game.transition = {true, 0, 0.2}
     game.should_close = false
     set_root_scene(game, make_main_menu()) 
 }
 
 game_update :: proc(game: ^Game) {
     dt := rl.GetFrameTime()
-    input := poll_input()
+    input := poll_input(game)
 
     // -------------------------------------------------------------------------
     // Update Camera Shake
@@ -121,10 +146,15 @@ game_update :: proc(game: ^Game) {
     }
 
     active_scene := get_active_scene(game)
-    if active_scene != nil {
+
+    if game.transition.active {
+    	game.transition.elapsed += dt    
+        if game.transition.elapsed >= game.transition.duration do game.transition.active = false
+    } else if active_scene != nil {
         scene_update(active_scene, game, input, dt)
     }
 
+
     // background music buffer streaming
     audio_update(&game.audio, dt)
 
@@ -146,13 +176,20 @@ game_render :: proc(game: ^Game) {
             for &scene in game.scene_stack {
                 scene_render(&scene)
             }
+
+            // when game transition active increment its elapsed time
+            // render will check and display accordingly
+            if game.transition.active {
+                a := u8(255 * (1 - clamp(game.transition.elapsed / game.transition.duration, 0, 1)))
+                rl.DrawRectangle(0, 0, VIEWPORT_W, VIEWPORT_H, {0, 0, 0, a})
+            }
         rl.EndMode2D()
 
     rl.EndTextureMode()
 
     render_game_to_window(game)
 
-    rl.DrawFPS(10, game.window_h - 20)
+	// when DEBUG do rl.DrawFPS(10, rl.GetScreenHeight() - 20)
     rl.EndDrawing()
 }
 
@@ -183,6 +220,17 @@ game_trigger_shake :: proc(game: ^Game, intensity: f32, duration: f32 = 0.15) {
 game_set_resolution :: proc(game: ^Game, res_index: int) {
     game.res_index = clamp(res_index, 0, len(RESOLUTIONS) - 1)
 
+    borderless := rl.IsWindowState({.BORDERLESS_WINDOWED_MODE})
+    if game.res_index == 0 {
+        if !borderless do rl.ToggleBorderlessWindowed()
+        return
+    }
+
+    if borderless {
+    	rl.ToggleBorderlessWindowed()  
+        rl.RestoreWindow()
+    } 
+    
     target_w := RESOLUTIONS[game.res_index].width
     target_h := RESOLUTIONS[game.res_index].height
 
@@ -200,13 +248,18 @@ game_set_resolution :: proc(game: ^Game, res_index: int) {
 render_game_to_window :: proc(game: ^Game) {
     texture := game.viewport.texture
 
+    w, h := f32(rl.GetScreenWidth()), f32(rl.GetScreenHeight())
+    s := min(w / VIEWPORT_W, h / VIEWPORT_H)
+    dst := rl.Rectangle{(w - VIEWPORT_W*s)/2, (h - VIEWPORT_H*s)/2, VIEWPORT_W*s, VIEWPORT_H*s}
+
     rl.BeginShaderMode(game.crt_shader)
         rl.DrawTexturePro(
             texture, 
             // src: inverted y coordinate flips opengl texture buffer correctly
             rl.Rectangle{0, 0, f32(texture.width), -f32(texture.height)},
             // dst: scales viewport canvas to fill window resolution
-            rl.Rectangle{0, 0, f32(game.window_w), f32(game.window_h)},
+            // rl.Rectangle{0, 0, f32(game.window_w), f32(game.window_h)},
+            dst,
             rl.Vector2{},
             0,
             rl.WHITE,

src/input_manager.odin

@@ -1,5 +1,6 @@
 package game
 
+import "core:strings"
 import rl "vendor:raylib"
 
 // ------------------------------------------------------------------------------
@@ -21,35 +22,40 @@ Input_Event :: struct {
 }
 
 // Currently active controller
-active_gamepad_id: i32 = -1
+is_real_pad :: proc(i: i32) -> bool {
+    return rl.IsGamepadAvailable(i) &&
+        !strings.contains(string(rl.GetGamepadName(i)), "Mouse") &&
+        !strings.contains(string(rl.GetGamepadName(i)), "Keyboard")
+}
 
-update_active_gamepad :: proc() {
+update_active_gamepad :: proc(game: ^Game) {
     // is there currently a controller, if so check if its still connected.
-    if active_gamepad_id != -1 {
-        if rl.IsGamepadAvailable(active_gamepad_id) {
+    if game.controller_gid != -1 {
+        if rl.IsGamepadAvailable(game.controller_gid) {
             // do nothing still connected
             return
         }
         // else we lost connection
-        active_gamepad_id = -1
-        rl.TraceLog(.WARNING, "Controller disconnected!!")
+        game.controller_gid = -1
+        game.controller_connected = false
     }
 
     for i: i32 = 0; i < 4; i += 1 {
-        if rl.IsGamepadAvailable(i) {
-            active_gamepad_id = i
+        if rl.IsGamepadAvailable(i) && is_real_pad(i) {
+        	game.controller_connected = true
+            game.controller_gid = i
             return 
         }
     }
 }
 
-poll_input :: proc() -> Input_Event {
+poll_input :: proc(game: ^Game) -> Input_Event {
     input_event := Input_Event{}
     input_dir := rl.Vector2{0, 0}
 
-    update_active_gamepad()
-    gamepad_active := active_gamepad_id != -1
-    gid := active_gamepad_id
+    update_active_gamepad(game)
+    gamepad_active := game.controller_connected
+    gid := game.controller_gid
 
     // --------------------------------------------------------------------------
     // Continuous Input (keyboard + gamepad d-pad)
@@ -86,7 +92,7 @@ poll_input :: proc() -> Input_Event {
     input_event.right_pressed   = rl.IsKeyPressed(.D) || rl.IsKeyPressed(.RIGHT) ||
     (gamepad_active && rl.IsGamepadButtonPressed(gid, .LEFT_FACE_RIGHT))
 
-    input_event.confirm_pressed = rl.IsKeyPressed(.ENTER) || rl.IsKeyPressed(.SPACE) ||
+    input_event.confirm_pressed = rl.IsKeyPressed(.ENTER) || 
     (gamepad_active && rl.IsGamepadButtonPressed(gid, .RIGHT_FACE_DOWN))
 
     input_event.pause_pressed   = rl.IsKeyPressed(.SPACE) ||

src/level_manager.odin

@@ -120,7 +120,7 @@ render_hud :: proc(level: Level) {
 
     p1_size := rl.MeasureTextEx(font, "PLAYER 1", HUD_FONT_SIZE, HUD_FONT_SPACING)
     p1_pos  := rl.Vector2{HUD_PADDING, HUD_PADDING}
-    rl.DrawTextEx(font, "PLAYER 1", p1_pos, HUD_FONT_SIZE, HUD_FONT_SPACING, rl.WHITE)
+    rl.DrawTextEx(font, "PLAYER", p1_pos, HUD_FONT_SIZE, HUD_FONT_SPACING, rl.WHITE)
 
     opp_size := rl.MeasureTextEx(font, "COMPUTER", HUD_FONT_SIZE, HUD_FONT_SPACING)
     opp_pos  := rl.Vector2{f32(VIEWPORT_W) - HUD_PADDING - opp_size.x, HUD_PADDING}

src/scene_manager.odin

@@ -177,8 +177,8 @@ list_menu_items :: proc(canvas: Canvas, menu: UI_Menu) {
         item_rec := get_canvas_item_rec(canvas, i, top_margin = UI_TOP_MARGIN_LIST)
 
         is_selected := (i == menu.selected_index)
-        border_color := is_selected ? rl.ORANGE : rl.DARKGRAY
-        text_color   := is_selected ? rl.ORANGE : rl.WHITE
+        border_color := is_selected ? rl.SKYBLUE : rl.DARKGRAY
+        text_color   := is_selected ? rl.SKYBLUE : rl.WHITE
 
         rl.DrawRectangleLinesEx(item_rec, UI_ITEM_BORDER_THICK, border_color)
 
@@ -191,7 +191,7 @@ list_menu_items :: proc(canvas: Canvas, menu: UI_Menu) {
 
         case UI_Slider:
             slider_rec := item_rec
-            text_width := rl.MeasureText(v.label, UI_LABEL_FONT_SIZE)
+            text_width := 31
             slider_rec.x = slider_rec.x + f32(text_width * 2)
             slider_rec.width = (slider_rec.width - f32(text_width * 2))
 
@@ -250,7 +250,7 @@ render_main_menu :: proc(scene: Scene) {
     menu, menu_ok := canvas.menu.?
     assert(menu_ok, "render_main_menu: Canvas is missing a UI_Menu component")
 
-    t_text: cstring = "PONG"
+    t_text: cstring = WINDOW_TITLE
     t_width := rl.MeasureText(t_text, UI_TITLE_FONT_SIZE)
     t_x := i32(canvas.bounds.width * 0.5) - (t_width / 2)
     rl.DrawText(t_text, t_x, i32(canvas.padding), UI_TITLE_FONT_SIZE, rl.WHITE)