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Accumulator-based update, frame rate control.\n\nPart of the [zio-zig](https://github.com/deblasis/zio-zig) ecosystem.\n\n## Quick start\n\n```zig\nconst gameloop = @import(\"ziogameloop\");\n\nvar loop = gameloop.GameLoop.init(.{\n    .tick_rate = 60,       // 60 updates per second\n    .max_catchup = 5,      // max updates per frame to prevent spiral\n});\n\nvar dt = gameloop.DeltaTracker.init();\n\n// Game loop\nvar ns: u64 = 0;\nwhile (true) {\n    const now = std.time.nanoTimestamp();\n    dt.update(@intCast(now));\n    ns += @intCast(dt.dt_ns);\n\n    const result = loop.tick(ns);\n    \n    // Fixed-rate update (may run multiple times)\n    for (0..result.updates) |_| {\n        updatePhysics();\n    }\n    \n    // Variable-rate render with interpolation\n    render(result.alpha); // alpha ∈ [0, 1] for smooth rendering\n}\n```\n\n```bash\nzig build test          # Run 40 tests\nzig build run-example   # Run example\n```\n\n## Example output\n\n```\n$ zig build run-example\nFrame 0: updates=0, alpha=0.00\nFrame 1: updates=1, alpha=0.00\nFrame 2: updates=1, alpha=0.00\nFrame 3: updates=1, alpha=0.00\nFrame 4: updates=1, alpha=0.00\n```\n\n## API\n\n### Config\n\n| Field | Default | Description |\n|-------|---------|-------------|\n| `tick_rate` | 60 | Updates per second |\n| `max_catchup` | 5 | Max updates per frame |\n| `target_fps` | 0 | 0 = unlimited |\n\n### GameLoop\n\n| Method | Description |\n|--------|-------------|\n| `init(config)` | Create game loop |\n| `tick(current_ns)` | Process frame, returns `TickResult` |\n| `totalFrames()` | Total frames processed |\n| `totalUpdates()` | Total fixed updates run |\n\n### TickResult\n\n| Field | Description |\n|-------|-------------|\n| `updates` | Number of fixed updates to run this frame |\n| `alpha` | Interpolation factor [0, 1] for smooth rendering |\n\n### DeltaTracker\n\nTracks frame-to-frame delta time.\n\n| Method | Description |\n|--------|-------------|\n| `init()` | Create tracker |\n| `update(current_ns)` | Update delta |\n| `dt_ns` | Delta time in nanoseconds |\n| `dt_sec` | Delta time in seconds (f32) |\n\n## License\n\nMIT. Copyright (c) 2026 Alessandro De Blasis.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdeblasis%2Fziogameloop","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdeblasis%2Fziogameloop","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdeblasis%2Fziogameloop/lists"}