(flutter) add CameraOrientationWidget

thermion_flutter/thermion_flutter/lib/thermion/widgets/camera/camera_orientation_widget.dart

@@ -0,0 +1,94 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+import 'package:thermion_flutter/thermion_flutter.dart';
+import 'package:vector_math/vector_math_64.dart' as v64;
+
+class CameraOrientationWidget extends StatefulWidget {
+  final ThermionViewer viewer;
+
+  const CameraOrientationWidget({Key? key, required this.viewer}) : super(key: key);
+
+  @override
+  _CameraOrientationWidgetState createState() => _CameraOrientationWidgetState();
+}
+
+class _CameraOrientationWidgetState extends State<CameraOrientationWidget> with SingleTickerProviderStateMixin {
+  late AnimationController _controller;
+  v64.Vector3? _position;
+  v64.Matrix3? _rotation;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      vsync: this,
+      duration: const Duration(milliseconds: 16), // ~60 FPS
+    )..repeat();
+
+    _controller.addListener(_updateCameraInfo);
+  }
+
+  void _updateCameraInfo() async {
+    final position = await widget.viewer.getCameraPosition();
+    final rotation = await widget.viewer.getCameraRotation();
+    setState(() {
+      _position = position;
+      _rotation = rotation;
+    });
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: const EdgeInsets.all(8.0),
+      decoration: BoxDecoration(
+        color: Colors.black.withOpacity(0.7),
+        borderRadius: BorderRadius.circular(8.0),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Text(
+            'Position: ${_formatVector(_position)}',
+            style: const TextStyle(color: Colors.white),
+          ),
+          const SizedBox(height: 4),
+          Text(
+            'Rotation: ${_formatMatrix(_rotation)}',
+            style: const TextStyle(color: Colors.white),
+          ),
+        ],
+      ),
+    );
+  }
+
+  String _formatVector(v64.Vector3? vector) {
+    if (vector == null) return 'N/A';
+    return '(${vector.x.toStringAsFixed(2)}, ${vector.y.toStringAsFixed(2)}, ${vector.z.toStringAsFixed(2)})';
+  }
+
+  String _formatMatrix(v64.Matrix3? matrix) {
+    if (matrix == null) return 'N/A';
+    return 'Yaw: ${_getYaw(matrix).toStringAsFixed(2)}°, Pitch: ${_getPitch(matrix).toStringAsFixed(2)}°, Roll: ${_getRoll(matrix).toStringAsFixed(2)}°';
+  }
+
+  double _getYaw(v64.Matrix3 matrix) {
+    return -atan2(matrix[2], matrix[0]) * 180 / pi;
+  }
+
+  double _getPitch(v64.Matrix3 matrix) {
+    return -asin(matrix[5]) * 180 / pi;
+  }
+
+  double _getRoll(v64.Matrix3 matrix) {
+    return atan2(matrix[3], matrix[4]) * 180 / pi;
+  }
+}