flutter3d_level_scene

A flutter3d level document turned into a scene, in plain Dart.

• LevelScene.build: the level's brushes as uploaded meshes, batched per material (LevelBatching.perMaterial, what a game draws with) or per brush (LevelBatching.perBrush, so a pixel names the brush it belongs to); its lights, reflection probes, decals, mirrors and camera screens as nodes. The answer is a LevelSceneParts: the scene, and the parts of it a caller keeps to rebuild, cull or release.
• LevelScene.materialFrom: a level material as an engine material, the one place that knows both.
• meshDataOf: a BrushSurface interleaved into the engine's standard vertex layout, for the brushes and for terrain.

Nothing here reads a file. The textures a level names and the .fmat materials it defers to are loaded by the caller and handed in already on the device; a caller with neither hands nothing, and every surface is drawn in the numbers the document carries.

import 'package:flutter3d_level_scene/flutter3d_level_scene.dart';
import 'package:flutter3d_sim/flutter3d_sim.dart';

final parts = const LevelScene().build(
  Level.fromJson(document),
  device: device,
);
final scene = parts.scene; // the brushes, lights and probes, ready to draw

flutter3d_app's LevelLoader is built on this, with the asset bundle and the image decoder in front of it; the level editor's light optimizer and its agent server use it with no window at all. Until 1.0.0-rc.1 it was part of flutter3d_editor_core.