From 60b35b35ab3fe78bbf74a40446e46067a3554728 Mon Sep 17 00:00:00 2001
From: Luan Nico <luanpotter27@gmail.com>
Date: Thu, 28 Aug 2025 00:25:32 -0400
Subject: [PATCH] feat: Add rotating light so the details of the teapot can be
 seen

---
 .../slides/lib/slides/slide_16_models.dart    | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/packages/slides/lib/slides/slide_16_models.dart b/packages/slides/lib/slides/slide_16_models.dart
index b6f1a84..3a1141f 100644
--- a/packages/slides/lib/slides/slide_16_models.dart
+++ b/packages/slides/lib/slides/slide_16_models.dart
@@ -1,10 +1,13 @@
 import 'dart:async';
+import 'dart:math';
 
 import 'package:flame/game.dart';
+import 'package:flame/geometry.dart';
 import 'package:flame_3d/camera.dart';
 import 'package:flame_3d/components.dart';
 import 'package:flame_3d/model.dart';
 import 'package:flame_3d/parser.dart';
+import 'package:flame_3d/resources.dart';
 import 'package:flame_3d_workshop_slides/slides/components/slide.dart';
 import 'package:flame_3d_workshop_slides/slides/components/slide_game.dart';
 import 'package:flame_3d_workshop_slides/slides/components/slide_text.dart';
@@ -39,8 +42,28 @@ class _TeapotModel extends FlameGame {
       LightComponent.ambient(
         intensity: 10.0,
       ),
+      _RotatingLight(),
       ModelComponent(model: teapot),
     ]);
     return super.onLoad();
   }
 }
+
+class _RotatingLight extends LightComponent {
+  double _angle = 0.0;
+  _RotatingLight()
+    : super.point(
+        intensity: 100.0,
+        position: Vector3(0, _height, 0),
+      );
+
+  @override
+  void update(double dt) {
+    _angle = (_angle + dt) % tau;
+    position.setValues(_radius * sin(_angle), _height, _radius * cos(_angle));
+    super.update(dt);
+  }
+
+  static const _radius = 3.0;
+  static const _height = 0.75;
+}