v0.4.0

Physics System

• Added standalone Box2D WASM physics module, loaded as a plugin via PhysicsPlugin
• New components: RigidBody, BoxCollider, CircleCollider, CapsuleCollider
• Three body types: Static, Kinematic, Dynamic
• Collision and sensor events via PhysicsEvents resource (collisionEnters, collisionExits, sensorEnters, sensorExits)
• Physics API helper for runtime force/impulse/velocity control
• Editor collider overlay visualization for debugging

Spine 4.1 Support

• Added spine41 standalone WASM module alongside existing spine38 and spine42
• Select Spine version 3.8, 4.1, or 4.2 in Settings → Project → Spine Version

Color Type Refactored

• Color properties now use { r, g, b, a } format instead of { x, y, z, w }
• Affects Sprite.color, SpineAnimation.color, Canvas.backgroundColor, Text.color, and Draw API color parameters
• Old scene files with { x, y, z, w } color format are auto-migrated on load

Renderer Improvements

• Added triangle drawing primitives
• Texture Y-flip moved from JS to GPU via GL_UNPACK_FLIP_Y_WEBGL
• Added premultiplied alpha (PMA) blend modes

Performance

• Switched from embind to extern "C" for C++/JS interop
• Removed RTTI and C++ exceptions from WASM builds
• Dead code elimination for smaller binary size

Editor

• Script compilation errors now shown via toast notifications and Output panel
• Continuous Canvas 2D rendering mode for smoother editor viewport updates

Bug Fixes

• Fixed Spine sequence texture flickering
• Fixed entity spawn flush timing
• Fixed collider overlay PPU scaling
• Fixed scene color property migration
• Fixed script error reporting in editor