What’s Changed

Highlights of this release include runtime display mode switching with automatic GUI rescaling, expanded tweening capabilities, Aseprite animation import/export support, improved GUI navigation, an emitter data serialization rework, and several stability improvements across the engine and utiLITI editor.

🔧 Engine & Core

• Added runtime display mode switching, allowing games to change resolution and display mode without restarting.
• Added automatic GUI rescaling and repositioning when the game resolution changes.
• Added focus-aware keyboard and controller navigation for core GUI components.
• Expanded the tweening system:
  • Added loopable tweens.
  • Added tween lifecycle events.
  • Added Camera tweening support.
  • Renamed Tween.begin() to Tween.start().
• Added support for registering custom Trigger types without implementing a custom MapObjectLoader.
• Added Animation Resources and JSON utilities for importing and exporting Aseprite animations.
• Resource lookups are now case-insensitive, preventing load failures caused by filename casing differences.
• Improved resource loading with more graceful exception handling.
• Fixed floating-point precision issues in collision detection that could cause false-positive intersections.
• Fixed an alignment clamping issue.
• Improved documentation throughout the engine, including extensive JavaDoc updates and clarifications.

🎨 Particle System

• Replaced ParticleParameter with serializable RangeAttribute.
• Renamed EmitterData to EmitterAttributes.
• Improved / simplified emitter serialization.

🛠️ utiLITI

• Added context menus for resources in the Resources tab.
• Added keyboard shortcuts for common resource operations.
• Added context-sensitive import menus to the Resources panel.
• Improved Asset Panel usability and interactions.
• Added double-click color picker support in the layer list.
• Fixed a macOS-specific crash caused by right-click interactions.

🖥️ Platform & Runtime

• Improved handling of borderless window mode changes.
• Added required desktop modules to packaged applications for improved runtime compatibility.

🏗️ Toolchain

• Updated the Gradle Wrapper to 9.5.1.
• Improved workflow security by pinning GitHub Actions to commit hashes.
• Updated and modernized CI/CD workflows and release tooling.
• Various code quality improvements, cleanup efforts, and Sonar findings addressed.

📦 Dependencies

Notable dependency updates include:

• Input4J → 1.2.0
• JUnit → 6.1.0
• SonarQube → 7.3.0
• Gradle Actions → 6
• Spotless → 8.6.0
• Mockito → 5.23.0
• JAXB → 4.0.9

⚠️ Breaking Changes

• Tween.begin() has been renamed to Tween.start().
• ParticleParameter has been removed and replaced by RangeAttribute. -> rename maxValue to max and minValue to min in your emitter XML.
• EmitterData has been renamed to EmitterAttributes.

New Contributors

• @SOrtiz1967 made their first contribution in #959

Full Changelog: https://github.com/gurkenlabs/litiengine/compare/0.11.1…0.12.0