more camera work

thermion_dart/lib/src/viewer/src/ffi/src/camera_ffi.dart

@@ -3,11 +3,11 @@ import 'dart:ffi';
 import 'package:vector_math/vector_math_64.dart';
 
 import '../../../../utils/matrix.dart';
-import '../../shared_types/camera.dart';
 import '../../thermion_viewer_base.dart';
 import 'thermion_dart.g.dart';
 
 class ThermionFFICamera extends Camera {
+
   final Pointer<TCamera> camera;
   final Pointer<TEngine> engine;
   late ThermionEntity _entity;
@@ -51,4 +51,14 @@ class ThermionFFICamera extends Camera {
   Future setModelMatrix(Matrix4 matrix) async {
     Camera_setModelMatrix(camera, matrix4ToDouble4x4(matrix));
   }
+
+   @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is ThermionFFICamera &&
+          runtimeType == other.runtimeType &&
+          camera == other.camera;
+
+  @override
+  int get hashCode => camera.hashCode;
 }

thermion_dart/lib/src/viewer/src/ffi/src/thermion_dart.g.dart

@@ -970,6 +970,19 @@ external void SceneManager_setCamera(
   ffi.Pointer<TCamera> camera,
 );
 
+@ffi.Native<ffi.Size Function(ffi.Pointer<TSceneManager>)>(isLeaf: true)
+external int SceneManager_getCameraCount(
+  ffi.Pointer<TSceneManager> sceneManager,
+);
+
+@ffi.Native<
+    ffi.Pointer<TCamera> Function(
+        ffi.Pointer<TSceneManager>, ffi.Size)>(isLeaf: true)
+external ffi.Pointer<TCamera> SceneManager_getCameraAt(
+  ffi.Pointer<TSceneManager> sceneManager,
+  int index,
+);
+
 @ffi.Native<
     ffi.Int Function(ffi.Pointer<TSceneManager>, EntityId,
         ffi.Pointer<ffi.Char>)>(isLeaf: true)

thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart

@@ -2205,6 +2205,25 @@ class ThermionViewerFFI extends ThermionViewer {
       _hooks.remove(hook);
     }
   }
+
+  ///
+  ///
+  ///
+  int getCameraCount() {
+    return SceneManager_getCameraCount(_sceneManager!);
+  }
+
+  ///
+  /// Returns the camera specified by the given index. Note that the camera at
+  /// index 0 is always the main camera; this cannot be destroyed.
+  ///
+  Camera getCameraAt(int index) {
+    final camera = SceneManager_getCameraAt(_sceneManager!, index);
+    if (camera == nullptr) {
+      throw Exception("No camera at index $index");
+    }
+    return ThermionFFICamera(camera, Viewer_getEngine(_viewer!));
+  }
 }
 
 class ThermionFFITexture extends ThermionTexture {

thermion_dart/lib/src/viewer/src/thermion_viewer_base.dart

@@ -979,4 +979,15 @@ abstract class ThermionViewer {
   ///
   ///
   Future unregisterRequestFrameHook(Future Function() hook);
+
+  ///
+  ///
+  ///
+  int getCameraCount();
+
+  ///
+  /// Returns the camera specified by the given index. Note that the camera at
+  /// index 0 is always the main camera; this cannot be destroyed.
+  ///
+  Camera getCameraAt(int index);
 }

thermion_dart/lib/src/viewer/src/thermion_viewer_stub.dart

@@ -995,6 +995,18 @@ class ThermionViewerStub extends ThermionViewer {
     // TODO: implement unregisterRequestFrameHook
     throw UnimplementedError();
   }
+  
+  @override
+  Camera getCameraAt(int index) {
+    // TODO: implement getCameraAt
+    throw UnimplementedError();
+  }
+  
+  @override
+  int getCameraCount() {
+    // TODO: implement getCameraCount
+    throw UnimplementedError();
+  }
 
   
 }

thermion_dart/lib/src/viewer/viewer.dart

@@ -1,7 +1,7 @@
 library thermion_viewer;
 
-export 'src/shared_types/shared_types.dart';
 export 'src/thermion_viewer_base.dart';
 export 'src/thermion_viewer_stub.dart'
     if (dart.library.io) 'src/ffi/thermion_viewer_ffi.dart'
     if (dart.library.js_interop) 'src/web_wasm/thermion_viewer_web_wasm.dart';
+export 'src/shared_types/shared_types.dart';