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move showBoundingBox/hideBoundingBox implementation to ThermionViewerFFI

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This commit is contained in:
Nick Fisher
2025-06-23 12:19:41 +08:00
parent 920f81c514
commit d053bfd6da
1 changed files with 178 additions and 8 deletions
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186
thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart
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@@ -2,9 +2,11 @@ import 'dart:async';
import 'package:thermion_dart/src/filament/src/implementation/background_image.dart';
import 'package:thermion_dart/src/filament/src/implementation/ffi_indirect_light.dart';
import 'package:thermion_dart/src/filament/src/implementation/ffi_ktx1_bundle.dart';
import 'package:thermion_dart/src/filament/src/implementation/ffi_material.dart';
import 'package:thermion_dart/src/filament/src/implementation/ffi_skybox.dart';
import 'package:thermion_dart/src/filament/src/implementation/ffi_swapchain.dart';
import 'package:thermion_dart/src/filament/src/implementation/ffi_texture.dart';
import 'package:thermion_dart/src/filament/src/interface/scene.dart';
import '../../../../filament/src/implementation/ffi_asset.dart';
import 'package:thermion_dart/src/filament/src/implementation/ffi_filament_app.dart';
import '../../../../filament/src/implementation/ffi_scene.dart';
@@ -504,10 +506,8 @@ class ThermionViewerFFI extends ThermionViewer {
_assets.remove(asset);
await scene.remove(asset);
if (asset.boundingBoxAsset != null) {
await scene.remove(asset.boundingBoxAsset! as FFIAsset);
await FilamentApp.instance!.destroyAsset(asset.boundingBoxAsset!);
}
await hideBoundingBox(asset, destroy: true);
await FilamentApp.instance!.destroyAsset(asset);
}
@@ -519,10 +519,8 @@ class ThermionViewerFFI extends ThermionViewer {
_logger.info("Destroying ${_assets.length} assets");
for (final asset in _assets) {
await scene.remove(asset);
if (asset.boundingBoxAsset != null) {
await scene.remove(asset.boundingBoxAsset! as FFIAsset);
await FilamentApp.instance!.destroyAsset(asset.boundingBoxAsset!);
}
await hideBoundingBox(asset, destroy: true);
for (final instance in (await asset.getInstances()).cast<FFIAsset>()) {
await scene.remove(instance);
}
@@ -790,6 +788,7 @@ class ThermionViewerFFI extends ThermionViewer {
///
///
Future addToScene(covariant FFIAsset asset) async {
_assets.add(asset);
await scene.add(asset);
}
@@ -797,8 +796,179 @@ class ThermionViewerFFI extends ThermionViewer {
///
///
Future removeFromScene(covariant FFIAsset asset) async {
if (!_assets.contains(asset)) {
throw Exception("Asset is not attached to this viewer");
}
await scene.remove(asset);
}
final _boundingBoxAssets = <ThermionAsset, Completer<ThermionAsset>>{};
///
///
///
Future showBoundingBox(ThermionAsset asset) async {
if (_boundingBoxAssets.containsKey(asset)) {
final bbAsset = await _boundingBoxAssets[asset]!.future;
await scene.add(bbAsset);
return;
}
var completer = Completer<ThermionAsset>();
_boundingBoxAssets[asset] = completer;
final boundingBox = await asset.getBoundingBox();
final min = [
boundingBox.center.x + boundingBox.min.x,
boundingBox.center.y + boundingBox.min.y,
boundingBox.center.z + boundingBox.min.z
];
final max = [
boundingBox.center.x + boundingBox.max.x,
boundingBox.center.y + boundingBox.max.y,
boundingBox.center.z + boundingBox.max.z
];
// Create vertices for the bounding box wireframe
// 8 vertices for a cube
final vertices = Float32List(8 * 3);
// Bottom vertices
vertices[0] = min[0];
vertices[1] = min[1];
vertices[2] = min[2]; // v0
vertices[3] = max[0];
vertices[4] = min[1];
vertices[5] = min[2]; // v1
vertices[6] = max[0];
vertices[7] = min[1];
vertices[8] = max[2]; // v2
vertices[9] = min[0];
vertices[10] = min[1];
vertices[11] = max[2]; // v3
// Top vertices
vertices[12] = min[0];
vertices[13] = max[1];
vertices[14] = min[2]; // v4
vertices[15] = max[0];
vertices[16] = max[1];
vertices[17] = min[2]; // v5
vertices[18] = max[0];
vertices[19] = max[1];
vertices[20] = max[2]; // v6
vertices[21] = min[0];
vertices[22] = max[1];
vertices[23] = max[2]; // v7
// Indices for lines (24 indices for 12 lines)
final indices = Uint16List.fromList([
// Bottom face
0, 1, 1, 2, 2, 3, 3, 0,
// Top face
4, 5, 5, 6, 6, 7, 7, 4,
// Vertical edges
0, 4, 1, 5, 2, 6, 3, 7
]);
// Create unlit material instance for the wireframe
final materialInstancePtr =
await withPointerCallback<TMaterialInstance>((cb) {
MaterialProvider_createMaterialInstanceRenderThread(
app.ubershaderMaterialProvider,
false,
true,
false,
false,
false,
false,
false,
false,
0,
false,
false,
0,
false,
0,
0,
false,
0,
false,
0,
false,
0,
false,
false,
false,
0,
0,
0,
false,
0,
false,
0,
false,
0,
false,
0,
false,
false,
false,
cb);
});
final material = FFIMaterialInstance(materialInstancePtr, app);
await material.setParameterFloat4(
"baseColorFactor", 1.0, 1.0, 0.0, 1.0); // Yellow wireframe
// Create geometry for the bounding box
final geometry = Geometry(
vertices,
indices,
primitiveType: PrimitiveType.LINES,
);
final bbAsset = await FilamentApp.instance!.createGeometry(
geometry,
animationManager,
materialInstances: [material],
keepData: false,
) as FFIAsset;
await bbAsset.setCastShadows(false);
await bbAsset.setReceiveShadows(false);
TransformManager_setParent(Engine_getTransformManager(app.engine),
bbAsset.entity, asset.entity, false);
geometry.uvs.free();
geometry.normals.free();
geometry.vertices.free();
geometry.indices.free();
completer.complete(bbAsset);
await scene.add(bbAsset);
return bbAsset;
}
Future hideBoundingBox(ThermionAsset asset, {bool destroy = false}) async {
if (_boundingBoxAssets.containsKey(asset)) {
final completer = _boundingBoxAssets[asset]!;
final bbAsset = await completer.future;
await scene.remove(bbAsset);
if (destroy) {
_boundingBoxAssets.remove(asset);
await FilamentApp.instance!.destroyAsset(bbAsset);
_logger.info("Bounding box destroyed");
} else {
_logger.info("Bounding box hidden");
}
} else {
_logger.warning("Warning - no bounding box for asset created");
}
}
}
class ViewerDisposedException implements Exception {}