commit 048575c14cb23267b94a3c9159b909c440000f20
Author: Jens <mail@jens.pub>
Date:   Sat Mar 21 15:45:24 2026 +0100

    init

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..1a7df27
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,9 @@
+---
+BasedOnStyle: Google
+
+IndentWidth: 4
+BreakBeforeBraces: Linux
+AllowShortEnumsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+BinPackArguments: false
+BinPackParameters: false
diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..f7c83c8
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,4 @@
+[*]
+root = true
+indent_style = space
+indent_size = 4
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a2d95df
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+# Xmake cache
+.xmake/
+build/
+.cache
+
+# MacOS Cache
+.DS_Store
+
+
+
diff --git a/assets/ball.aseprite b/assets/ball.aseprite
new file mode 100644
index 0000000..540d179
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diff --git a/assets/ball.png b/assets/ball.png
new file mode 100644
index 0000000..b717db9
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diff --git a/assets/block.aseprite b/assets/block.aseprite
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index 0000000..560e374
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diff --git a/assets/block.png b/assets/block.png
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diff --git a/compile_commands.json b/compile_commands.json
new file mode 100644
index 0000000..9241b06
--- /dev/null
+++ b/compile_commands.json
@@ -0,0 +1,31 @@
+[
+{
+  "directory": "/home/jens/Development/cex/colossus_march",
+  "arguments": ["/usr/bin/gcc", "-c", "-m64", "-g", "-O0", "-std=c23", "-Isrc", "-Isrc/screens", "-I", "/home/jens/.xmake/packages/r/raylib/5.5/efaf75c5cc7042868d9f9fc4196a080a/include", "-I", "/home/jens/.xmake/packages/b/box2d/v3.1.1/2aecaa50772341c7b9eb7c79ee9859aa/include", "-o", "build/.objs/colossus_march/linux/x86_64/debug/src/screens/intro.c.o", "src/screens/intro.c"],
+  "file": "src/screens/intro.c"
+},
+{
+  "directory": "/home/jens/Development/cex/colossus_march",
+  "arguments": ["/usr/bin/gcc", "-c", "-m64", "-g", "-O0", "-std=c23", "-Isrc", "-Isrc/screens", "-I", "/home/jens/.xmake/packages/r/raylib/5.5/efaf75c5cc7042868d9f9fc4196a080a/include", "-I", "/home/jens/.xmake/packages/b/box2d/v3.1.1/2aecaa50772341c7b9eb7c79ee9859aa/include", "-o", "build/.objs/colossus_march/linux/x86_64/debug/src/screens/menu.c.o", "src/screens/menu.c"],
+  "file": "src/screens/menu.c"
+},
+{
+  "directory": "/home/jens/Development/cex/colossus_march",
+  "arguments": ["/usr/bin/gcc", "-c", "-m64", "-g", "-O0", "-std=c23", "-Isrc", "-Isrc/screens", "-I", "/home/jens/.xmake/packages/r/raylib/5.5/efaf75c5cc7042868d9f9fc4196a080a/include", "-I", "/home/jens/.xmake/packages/b/box2d/v3.1.1/2aecaa50772341c7b9eb7c79ee9859aa/include", "-o", "build/.objs/colossus_march/linux/x86_64/debug/src/screens/game.c.o", "src/screens/game.c"],
+  "file": "src/screens/game.c"
+},
+{
+  "directory": "/home/jens/Development/cex/colossus_march",
+  "arguments": ["/usr/bin/gcc", "-c", "-m64", "-g", "-O0", "-std=c23", "-Isrc", "-Isrc/screens", "-I", "/home/jens/.xmake/packages/r/raylib/5.5/efaf75c5cc7042868d9f9fc4196a080a/include", "-I", "/home/jens/.xmake/packages/b/box2d/v3.1.1/2aecaa50772341c7b9eb7c79ee9859aa/include", "-o", "build/.objs/colossus_march/linux/x86_64/debug/src/sprite.c.o", "src/sprite.c"],
+  "file": "src/sprite.c"
+},
+{
+  "directory": "/home/jens/Development/cex/colossus_march",
+  "arguments": ["/usr/bin/gcc", "-c", "-m64", "-g", "-O0", "-std=c23", "-Isrc", "-Isrc/screens", "-I", "/home/jens/.xmake/packages/r/raylib/5.5/efaf75c5cc7042868d9f9fc4196a080a/include", "-I", "/home/jens/.xmake/packages/b/box2d/v3.1.1/2aecaa50772341c7b9eb7c79ee9859aa/include", "-o", "build/.objs/colossus_march/linux/x86_64/debug/src/main.c.o", "src/main.c"],
+  "file": "src/main.c"
+},
+{
+  "directory": "/home/jens/Development/cex/colossus_march",
+  "arguments": ["/usr/bin/gcc", "-c", "-m64", "-g", "-O0", "-std=c23", "-Isrc", "-Isrc/screens", "-I", "/home/jens/.xmake/packages/r/raylib/5.5/efaf75c5cc7042868d9f9fc4196a080a/include", "-I", "/home/jens/.xmake/packages/b/box2d/v3.1.1/2aecaa50772341c7b9eb7c79ee9859aa/include", "-o", "build/.objs/colossus_march/linux/x86_64/debug/src/screens.c.o", "src/screens.c"],
+  "file": "src/screens.c"
+}]
diff --git a/screenshot000.png b/screenshot000.png
new file mode 100644
index 0000000..9c18905
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diff --git a/src/defs.h b/src/defs.h
new file mode 100644
index 0000000..2640895
--- /dev/null
+++ b/src/defs.h
@@ -0,0 +1,38 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "raylib.h"
+
+#define GAME_NAME "Colossus March"
+
+#define BG CLITERAL(Color){243, 223, 162, 255}
+#define BALL CLITERAL(Color){126, 189, 194, 255}
+#define BLOCK CLITERAL(Color){187, 68, 48, 255}
+
+#define length(a) (sizeof(a) / sizeof(*a))
+
+#define append(a, i)       \
+    {                      \
+        a.data[a.len] = i; \
+        a.len++;           \
+    }
+
+typedef size_t size;
+
+typedef int8_t i8;
+typedef int16_t i16;
+typedef int32_t i32;
+typedef int64_t i64;
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+typedef struct GameContext {
+    bool exit;
+} GameContext;
+
+extern GameContext g_ctx;
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..82bee5b
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,30 @@
+#include <stdint.h>
+
+#include "defs.h"
+#include "raylib.h"
+#include "screens.h"
+
+GameContext g_ctx = {0};
+
+int main(void)
+{
+    SetConfigFlags(FLAG_WINDOW_RESIZABLE);
+    InitWindow(800, 600, "flappu");
+    SetTargetFPS(144);
+    SetExitKey(KEY_F12);
+
+    while (!WindowShouldClose() && !g_ctx.exit) {
+        screen_update();
+
+        BeginDrawing();
+        ClearBackground(BG);
+
+        screen_draw();
+
+        EndDrawing();
+    }
+
+    CloseWindow();
+
+    return 0;
+}
diff --git a/src/screens.c b/src/screens.c
new file mode 100644
index 0000000..6fa105b
--- /dev/null
+++ b/src/screens.c
@@ -0,0 +1,65 @@
+#include "screens.h"
+
+#include "game.h"
+#include "intro.h"
+#include "menu.h"
+
+static Screen active_screen = Intro;
+
+void screen_switch_to(Screen screen)
+{
+    if (screen != active_screen) {
+        switch (active_screen) {
+            case Intro:
+                intro_screen_cleanup();
+                break;
+            case Menu:
+                menu_screen_cleanup();
+                break;
+            case Game:
+                game_screen_cleanup();
+                break;
+        }
+
+        active_screen = screen;
+
+        switch (active_screen) {
+            case Intro:
+            case Menu:
+                break;
+            case Game:
+                game_screen_init();
+                break;
+        }
+    }
+}
+
+void screen_update()
+{
+    switch (active_screen) {
+        case Intro: {
+            intro_screen_update();
+        } break;
+        case Menu: {
+            menu_screen_update();
+        } break;
+        case Game: {
+            game_screen_update();
+        } break;
+    }
+}
+
+void screen_draw()
+{
+    switch (active_screen) {
+        case Intro: {
+            intro_screen_draw();
+        } break;
+        case Menu: {
+            menu_screen_draw();
+        } break;
+        case Game: {
+            game_screen_draw();
+        } break;
+    }
+}
diff --git a/src/screens.h b/src/screens.h
new file mode 100644
index 0000000..138a768
--- /dev/null
+++ b/src/screens.h
@@ -0,0 +1,11 @@
+#pragma once
+
+typedef enum Screen {
+    Intro,
+    Menu,
+    Game
+} Screen;
+
+void screen_switch_to(Screen screen);
+void screen_update();
+void screen_draw();
diff --git a/src/screens/game.c b/src/screens/game.c
new file mode 100644
index 0000000..23b5025
--- /dev/null
+++ b/src/screens/game.c
@@ -0,0 +1,89 @@
+#include "game.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+
+#include "raylib.h"
+#include "raymath.h"
+#include "screens.h"
+#include "sprite.h"
+
+static Player player;
+static Camera2D cam;
+
+static bool paused = false;
+static bool game_over = false;
+
+void process_input()
+{
+    if (IsKeyPressed(KEY_P)) {
+        paused = true;
+    }
+
+    if (IsKeyPressed(KEY_F10)) {
+        screen_switch_to(Menu);
+    }
+}
+
+void game_screen_init()
+{
+    paused = 0;
+    game_over = 0;
+
+    Sprite* player_sprite = sprite_new("assets/ball.png",
+                                       &(Vector2){100, 400},
+                                       NULL,
+                                       &(Rectangle){0, 0, 32, 32},
+                                       &BALL);
+
+    Animation* anim = malloc(sizeof(Animation));
+    if (!anim) abort();
+
+    *anim = (Animation){
+        .current_frame = 0, .frame_count = 3, .current_time = 0, .fps = 4};
+    player_sprite->animation = anim;
+    player = (Player){player_sprite};
+
+    cam = (Camera2D){{200, GetScreenHeight() / 2.0f}, player.sprite->pos, 0, 2};
+}
+
+void game_screen_update()
+{
+    if (game_over) {
+        if (IsKeyPressed(KEY_SPACE)) {
+            game_over = false;
+            game_screen_cleanup();
+            game_screen_init();
+        }
+        return;
+    }
+
+    if (paused) return;
+
+    float dt = GetFrameTime();
+
+    process_input();
+
+    // Update Camera
+    cam.target = Vector2Lerp(cam.target, player.sprite->pos, 0.1);
+
+    // Update Animation
+    // TODO: make it scalable
+    animation_update(player.sprite->animation);
+};
+
+void game_screen_draw()
+{
+    BeginMode2D(cam);
+
+    // Draw Stuff
+    sprite_draw(player.sprite);
+
+    EndMode2D();
+}
+
+void game_screen_cleanup()
+{
+    // free player
+    sprite_free(player.sprite);
+};
diff --git a/src/screens/game.h b/src/screens/game.h
new file mode 100644
index 0000000..47a751b
--- /dev/null
+++ b/src/screens/game.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include "sprite.h"
+
+typedef struct Player {
+    Sprite* sprite;
+} Player;
+
+void game_screen_init();
+void game_screen_update();
+void game_screen_draw();
+void game_screen_cleanup();
diff --git a/src/screens/intro.c b/src/screens/intro.c
new file mode 100644
index 0000000..4f00980
--- /dev/null
+++ b/src/screens/intro.c
@@ -0,0 +1,21 @@
+#include "intro.h"
+
+#include "defs.h"
+#include "raylib.h"
+#include "screens.h"
+
+void intro_screen_update()
+{
+    if (IsKeyPressed(KEY_ENTER)) {
+        screen_switch_to(Menu);
+    }
+}
+
+void intro_screen_draw()
+{
+    DrawText(GAME_NAME, 120, 100, 120, WHITE);
+}
+
+void intro_screen_cleanup()
+{
+}
diff --git a/src/screens/intro.h b/src/screens/intro.h
new file mode 100644
index 0000000..2e626d9
--- /dev/null
+++ b/src/screens/intro.h
@@ -0,0 +1,5 @@
+#pragma once
+
+void intro_screen_update();
+void intro_screen_draw();
+void intro_screen_cleanup();
diff --git a/src/screens/menu.c b/src/screens/menu.c
new file mode 100644
index 0000000..0b15d23
--- /dev/null
+++ b/src/screens/menu.c
@@ -0,0 +1,63 @@
+#include "menu.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "defs.h"
+#include "raylib.h"
+#include "screens.h"
+
+typedef enum Option {
+    Start,
+    Settings,
+    Quit
+} Option;
+
+static const Option menu_options[] = {Start, Settings, Quit};
+size_t selected = Start;
+
+void menu_screen_update()
+{
+    if (IsKeyPressed(KEY_ENTER)) {
+        switch (menu_options[selected]) {
+            case Start:
+                screen_switch_to(Game);
+                break;
+            case Settings:
+                break;
+            case Quit:
+                g_ctx.exit = true;
+                break;
+        }
+    }
+
+    if (IsKeyPressed(KEY_DOWN)) {
+        selected += 1;
+    }
+    if (IsKeyPressed(KEY_UP)) {
+        selected -= 1;
+    }
+
+    if (selected <= 0) selected = 0;
+    if (selected >= length(menu_options)) selected = length(menu_options) - 1;
+};
+
+void menu_screen_draw()
+{
+    for (size_t i = 0; i < length(menu_options); i++) {
+        Color color = selected == i ? GREEN : WHITE;
+
+        switch ((Option)menu_options[i]) {
+            case Start:
+                DrawText("Start", 20, 100 * i + 100, 64, color);
+                break;
+            case Settings:
+                DrawText("Settings", 20, 100 * i + 100, 64, color);
+                break;
+            case Quit:
+                DrawText("Quit", 20, 100 * i + 100, 64, color);
+                break;
+        }
+    }
+}
+void menu_screen_cleanup() {};
diff --git a/src/screens/menu.h b/src/screens/menu.h
new file mode 100644
index 0000000..b321ffd
--- /dev/null
+++ b/src/screens/menu.h
@@ -0,0 +1,5 @@
+#pragma once
+
+void menu_screen_update();
+void menu_screen_draw();
+void menu_screen_cleanup();
diff --git a/src/sprite.c b/src/sprite.c
new file mode 100644
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--- /dev/null
+++ b/src/sprite.c
@@ -0,0 +1,84 @@
+#include "sprite.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "raylib.h"
+#include "raymath.h"
+
+void* xmalloc(size_t size)
+{
+    void* p = malloc(size);
+    if (!p) abort();
+    return p;
+}
+
+Sprite* sprite_new(const char* path,
+                   Vector2* pos,
+                   Vector2* anchor,
+                   Rectangle* source,
+                   Color* color)
+{
+    assert(path && "path must not be empty");
+
+    Sprite* sprite = xmalloc(sizeof(Sprite));
+    if (!sprite) abort();
+
+    sprite->tex = LoadTexture(path);
+
+    sprite->pos = pos != NULL ? *pos : (Vector2){0, 0};
+
+    sprite->source =
+        source != NULL
+            ? *source
+            : (Rectangle){0, 0, sprite->tex.width, sprite->tex.height};
+
+    sprite->anchor = anchor != NULL ? *anchor
+                                    : (Vector2){sprite->source.width / 2.0f,
+                                                sprite->source.height / 2.0f};
+
+    sprite->color = color != NULL ? *color : (Color){26, 164, 98, 255};
+
+    sprite->animation = NULL;
+
+    return sprite;
+}
+
+void sprite_draw(Sprite* s)
+{
+    Rectangle source = s->source;
+
+    // update source rect if sprite has animation
+    if (s->animation) {
+        source.x = source.width * (float)s->animation->current_frame;
+    }
+
+    DrawTextureRec(
+        s->tex, source, Vector2Subtract(s->pos, s->anchor), s->color);
+}
+
+void sprite_free(Sprite* s)
+{
+    if (s->animation) free(s->animation);
+    UnloadTexture(s->tex);
+    free(s);
+}
+
+//
+// Animation System
+//
+void animation_update(Animation* a)
+{
+    float dt = GetFrameTime();
+    a->current_time += dt;
+
+    if (a->current_time >= 1.0f / a->fps) {
+        a->current_time = 0;
+        a->current_frame++;
+
+        if (a->current_frame >= a->frame_count) {
+            a->current_frame = 0;
+        }
+    }
+}
diff --git a/src/sprite.h b/src/sprite.h
new file mode 100644
index 0000000..8f742c3
--- /dev/null
+++ b/src/sprite.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include "defs.h"
+#include "raylib.h"
+
+typedef struct Animation {
+    u8 frame_count;
+    u8 current_frame;
+    u8 fps;
+    float current_time;
+} Animation;
+
+typedef struct Sprite {
+    Texture2D tex;
+    Vector2 pos;
+    Vector2 anchor;
+    Rectangle source;
+    Color color;
+    Animation* animation;
+} Sprite;
+
+Sprite* sprite_new(const char* path,
+                   Vector2* pos,
+                   Vector2* anchor,
+                   Rectangle* source,
+                   Color* color);
+
+void sprite_draw(Sprite* sprite);
+
+void sprite_free(Sprite* sprite);
+
+void animation_update(Animation* a);
diff --git a/xmake.lua b/xmake.lua
new file mode 100644
index 0000000..af40b17
--- /dev/null
+++ b/xmake.lua
@@ -0,0 +1,80 @@
+add_rules("mode.debug", "mode.release")
+
+add_requires("raylib", "box2d")
+
+target("colossus_march")
+set_languages("c23")
+set_kind("binary")
+add_files("src/**.c")
+add_packages("raylib", "box2d")
+add_includedirs("src", os.dirs("src/**"))
+set_rundir("$(projectdir)")
+
+--
+-- If you want to known more usage about xmake, please see https://xmake.io
+--
+-- ## FAQ
+--
+-- You can enter the project directory firstly before building project.
+--
+--   $ cd projectdir
+--
+-- 1. How to build project?
+--
+--   $ xmake
+--
+-- 2. How to configure project?
+--
+--   $ xmake f -p [macosx|linux|iphoneos ..] -a [x86_64|i386|arm64 ..] -m [debug|release]
+--
+-- 3. Where is the build output directory?
+--
+--   The default output directory is `./build` and you can configure the output directory.
+--
+--   $ xmake f -o outputdir
+--   $ xmake
+--
+-- 4. How to run and debug target after building project?
+--
+--   $ xmake run [targetname]
+--   $ xmake run -d [targetname]
+--
+-- 5. How to install target to the system directory or other output directory?
+--
+--   $ xmake install
+--   $ xmake install -o installdir
+--
+-- 6. Add some frequently-used compilation flags in xmake.lua
+--
+-- @code
+--    -- add debug and release modes
+--    add_rules("mode.debug", "mode.release")
+--
+--    -- add macro definition
+--    add_defines("NDEBUG", "_GNU_SOURCE=1")
+--
+--    -- set warning all as error
+--    set_warnings("all", "error")
+--
+--    -- set language: c99, c++11
+--    set_languages("c99", "c++11")
+--
+--    -- set optimization: none, faster, fastest, smallest
+--    set_optimize("fastest")
+--
+--    -- add include search directories
+--    add_includedirs("/usr/include", "/usr/local/include")
+--
+--    -- add link libraries and search directories
+--    add_links("tbox")
+--    add_linkdirs("/usr/local/lib", "/usr/lib")
+--
+--    -- add system link libraries
+--    add_syslinks("z", "pthread")
+--
+--    -- add compilation and link flags
+--    add_cxflags("-stdnolib", "-fno-strict-aliasing")
+--    add_ldflags("-L/usr/local/lib", "-lpthread", {force = true})
+--
+-- @endcode
+--