Kotlin GameDev Core: Graphics, Input, And The Game Loop

By Owen J Ethan

KOTLIN GAMEDEV: CORE is the essential, hands-on guide for developers ready to build high-performance 2D games using the Kotlin programming language.

Move beyond simple tutorials and master the architectural and mathematical foundations used in professional game studios. This handbook focuses on engineering discipline, ensuring your games are not only fun but also scalable, maintainable, and fast.

What You Will Master:

The Game Loop (Chapter 3): Understand the heartbeat of every real-time application. Implement the Update and Render phases and solve the critical problem of frame-rate independence using fixed and variable timesteps.

Performance and Asynchronicity: Leverage modern Kotlin features like Coroutines to manage non-blocking tasks, ensuring your game never freezes while loading assets or handling network requests.

Core Systems: Build the fundamental engine components from the ground up:

Vector Math: Implement realistic physics, gravity, and velocity-based movement.

Collision Detection: Master the fast and reliable Axis-Aligned Bounding Box (AABB) test.

Input Handling: Learn the difference between Polling (for movement) and Event-Driven systems (for one-shot actions) for keyboard and mouse control.

Architecture for Scale (ECS): Architect your game using the Entity Component System (ECS) pattern, separating data from behavior for unparalleled flexibility and optimization.1

Rendering and World View: Control the player's perspective by implementing the Orthographic Camera and mastering the critical transformation between World Space and Screen Space.

• Format: Paperback
• Language: English
• ISBN: B0G25HKGH3
• ISBN13: 9798274327299
• Release Date: November 2025
• Publisher: Independently Published
• Length: 130 Pages
• Weight: 0.42 lbs.
• Dimensions: 0.3" x 6.1" x 9.2"