4. Detecting User Input
by Alberto Cejas Sánchez, David Saltares Márquez
Libgdx Cross-platform Game Development Cookbook
- Libgdx Cross-platform Game Development Cookbook
- Table of Contents
- Libgdx Cross-platform Game Development Cookbook
- Credits
- About the Authors
- About the Reviewers
- www.PacktPub.com
- Preface
- 1. Diving into Libgdx
- Introduction
- Setting up a cross-platform development environment
- Creating a cross-platform project
- Understanding the project structure and application life cycle
- Updating and managing project dependencies
- Using source control on a Libgdx project with Git
- Importing and running the Libgdx official demos
- 2. Working with 2D Graphics
- 3. Advanced 2D Graphics
- 4. Detecting User Input
- 5. Audio and File I/O
- Introduction
- Playing short sound effects
- Audio streaming for background music
- Optimizing audio files to reduce download sizes
- Procedural audio generators
- Engine sounds with dynamic audio
- The 2D space sound system
- The first approach to file handling in Libgdx
- Using preferences to store game states and options
- The XML parsing primer
- JSON serialization and deserialization
- 6. Font Rendering
- 7. Asset Management
- 8. User Interfaces with Scene2D
- 9. The 2D Maps API
- 10. Rigid Body Physics with Box2D
- Introduction
- Introducing Box2D
- Introducing more complex shapes
- Introducing joints
- Real-life joints example – bike simulator
- Reacting to collisions
- Sensors and collision filtering
- Querying the world
- Building a physics world from level data
- Implementing a deferred raycaster
- The fixed timestep approach
- 11. Third-party Libraries and Extras
- Introduction
- Making libraries compatible with GWT
- Managing platform-specific code
- Smooth animations with Universal Tween Engine
- Dynamic 2D lighting with Box2DLights
- Adding support for localization
- Finite state machine and messaging
- Component-based entity systems with Ashley
- Skeletal animations with Spine
- 12. Performance and Optimizations
- 13. Giving Back
- Index
In this chapter, we will cover the following recipes:
- Detecting user input via event polling
- Detecting user input via event listening
- Managing multiple listeners at once
- Detecting more complex gestures
- Introducing the controllers API
- Input mapping for cross-platform development
Games are fundamentally different from other kinds of modern media: they are interactive. The player adopts an active role and jumps into the action of what is happening on the other side. This is a true marvel and one of the reasons why people feel so engaged.
For a game to be enjoyable, interaction needs to be seamless and fluid. The user should not feel a barrier or any disconnection between what they want to do and what actually happens. Good controls are required for your game to succeed!
Throughout this chapter, we will discuss the myriad of ways to detect user input within Libgdx and the extra utilities you can use to make your life easier.
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