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don't allow creating instances for GridOverlay asset and only expose a single entity

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This commit is contained in:
Nick Fisher
2025-07-07 17:21:13 +08:00
parent db44bc6f74
commit b4ea80a84c
3 changed files with 32 additions and 8 deletions
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29
thermion_dart/lib/src/filament/src/implementation/grid_overlay.dart
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@@ -12,16 +12,39 @@ class GridOverlay extends FFIAsset {
static Future<GridOverlay> create(
FFIFilamentApp app, Pointer<TAnimationManager> animationManager) async {
if (_overlay == null) {
_gridMaterial ??= FFIMaterial(Material_createGridMaterial(app.engine), app);
_gridMaterial ??=
FFIMaterial(Material_createGridMaterial(app.engine), app);
final asset = await withPointerCallback<TSceneAsset>((cb) =>
SceneAsset_createGridRenderThread(
app.engine, _gridMaterial!.getNativeHandle(), cb));
_overlay = GridOverlay(asset, app, animationManager);
var materialInstance = await _overlay!.getMaterialInstanceAt();
await materialInstance.setParameterFloat3("gridColor", 0.1, 0.1, 0.1);
await materialInstance
.setTransparencyMode(TransparencyMode.TWO_PASSES_TWO_SIDES);
await materialInstance.setCullingMode(CullingMode.NONE);
await materialInstance.setParameterFloat3("gridColor", 0.3, 0.35, 0.3);
final ffiAsset =
FFIAsset(asset, FilamentApp.instance as FFIFilamentApp, nullptr);
await FilamentApp.instance!.setPriority(ffiAsset.entity, 0);
for (final child in await ffiAsset.getChildEntities()) {
await FilamentApp.instance!.setPriority(child, 7);
}
// await materialInstance.setParameterFloat("distance", 10.0);
}
return _overlay!;
}
///
///
///
@override
Future<FFIAsset> createInstance(
{List<MaterialInstance>? materialInstances = null}) async {
throw Exception(
"Only a single instance of the grid overlay can be created");
}
}