Add guns

assets/tiles/Level3.tmx

@@ -91,7 +91,7 @@
   </object>
  </objectgroup>
  <objectgroup id="3" name="Colliders">
-  <object id="10" name="HObject" type="HObject" x="640" y="320" width="64" height="48">
+  <object id="10" name="HObject" type="HObject" x="640" y="304" width="64" height="80">
    <properties>
     <property name="AtomicSize" type="float" value="5"/>
     <property name="HotHeight" type="object" value="32"/>

lib/game/game.dart

@@ -4,19 +4,34 @@ import 'dart:math';
 import 'package:flame/components.dart';
 import 'package:flame/events.dart';
 import 'package:flame/game.dart';
+import 'package:flame/palette.dart';
 import 'package:flame_audio/flame_audio.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:hold_labs/game/level.dart';
+import 'package:hold_labs/game/player.dart';
 
 class HoldLabsGame extends FlameGame
-    with HasCollisionDetection, HasKeyboardHandlerComponents {
+    with
+        HasCollisionDetection,
+        HasKeyboardHandlerComponents,
+        MouseMovementDetector,
+        TapCallbacks,
+        SecondaryTapDetector,
+        ScrollDetector,
+        PanDetector {
   HoldLabsGame()
       : super(
           camera: CameraComponent.withFixedResolution(width: 320, height: 180),
         );
 
   Level? currentLevel;
+  final Vector2 mousePosition = Vector2.zero();
+
+  final _redGunPaint = BasicPalette.red.paint()..strokeWidth = 4;
+  final _blueGunPaint = BasicPalette.blue.paint()..strokeWidth = 4;
+
+  bool isFiring = false;
 
   @override
   Color backgroundColor() {
@@ -35,6 +50,7 @@ class HoldLabsGame extends FlameGame
         'Tiles.png',
         'PortalPad.png',
         'Buttons.png',
+        'Guns.png',
       ],
     );
 
@@ -52,7 +68,77 @@ class HoldLabsGame extends FlameGame
 
   void changeLevel(int levelId) {
     currentLevel?.removeFromParent();
-    currentLevel = Level(min(levelId, 3));
+    currentLevel = Level(min(levelId, 4));
     world.add(currentLevel!);
   }
+
+  @override
+  void onMouseMove(PointerHoverInfo info) {
+    mousePosition.setFrom(camera.globalToLocal(info.eventPosition.global));
+  }
+
+  @override
+  void onPanDown(DragDownInfo info) {
+    isFiring = true;
+  }
+
+  @override
+  void onPanUpdate(DragUpdateInfo info) {
+    isFiring = true;
+    mousePosition.setFrom(camera.globalToLocal(info.eventPosition.global));
+  }
+
+  @override
+  void onPanStart(DragStartInfo info) {
+    isFiring = true;
+  }
+
+  @override
+  void onPanEnd(DragEndInfo info) {
+    isFiring = false;
+  }
+
+  @override
+  void onPanCancel() {
+    isFiring = false;
+  }
+
+  @override
+  void onSecondaryTapDown(TapDownInfo info) {
+    if (currentLevel?.isMounted ?? false) {
+      if (currentLevel!.player.hasGun) {
+        currentLevel?.player.switchGun();
+      }
+    }
+  }
+
+  @override
+  void onScroll(PointerScrollInfo info) {
+    if (currentLevel?.isMounted ?? false) {
+      if (currentLevel!.player.hasGun) {
+        currentLevel?.player.switchGun();
+      }
+    }
+  }
+
+  @override
+  void render(Canvas canvas) {
+    super.render(canvas);
+    if (currentLevel?.isMounted ?? false) {
+      final player = currentLevel!.player;
+
+      if (player.hasGun && isFiring) {
+        if ((currentLevel!.player.results?.isActive ?? false) &&
+            currentLevel!.player.results!.intersectionPoint != null) {
+          canvas.drawLine(
+            camera.localToGlobal(currentLevel!.player.gunPosition).toOffset(),
+            camera
+                .localToGlobal(currentLevel!.player.results!.intersectionPoint!)
+                .toOffset(),
+            player.gunType == GunType.hot ? _redGunPaint : _blueGunPaint,
+          );
+        }
+      }
+    }
+  }
 }

lib/game/gun_pickup.dart

@@ -0,0 +1,30 @@
+import 'dart:async';
+
+import 'package:flame/collisions.dart';
+import 'package:flame/components.dart';
+import 'package:hold_labs/game/game.dart';
+
+class GunPickup extends PositionComponent with HasGameReference<HoldLabsGame> {
+  GunPickup({super.position});
+
+  late final SpriteAnimationComponent _guns;
+
+  @override
+  Future<void> onLoad() async {
+    _guns = SpriteAnimationComponent.fromFrameData(
+      game.images.fromCache('Guns.png'),
+      SpriteAnimationData.sequenced(
+        amount: 2,
+        stepTime: 0.3,
+        textureSize: Vector2.all(16),
+      ),
+    );
+
+    size = _guns.size;
+
+    await add(_guns);
+    await add(
+      RectangleHitbox(collisionType: CollisionType.passive),
+    );
+  }
+}

lib/game/h_object.dart

@@ -95,13 +95,15 @@ class HObject extends PositionComponent with HasPaint, Snapshot {
       _temperatureFactor -= _temperatureChangeRate * dt;
       _updateTemperature();
       position.y = lerpDouble(_coldHeight.y, _hotHeight.y, _temperatureFactor)!;
+      isCooling = false;
     }
 
     if (isHeating) {
       _temperatureFactor += _temperatureChangeRate * dt;
       _updateTemperature();
 
       position.y = lerpDouble(_coldHeight.y, _hotHeight.y, _temperatureFactor)!;
+      isHeating = false;
     }
   }
 

lib/game/level.dart

@@ -7,6 +7,7 @@ import 'package:flame_audio/flame_audio.dart';
 import 'package:flame_tiled/flame_tiled.dart';
 import 'package:hold_labs/game/button.dart';
 import 'package:hold_labs/game/game.dart';
+import 'package:hold_labs/game/gun_pickup.dart';
 import 'package:hold_labs/game/h_object.dart';
 import 'package:hold_labs/game/platform.dart';
 import 'package:hold_labs/game/player.dart';
@@ -16,7 +17,7 @@ class Level extends PositionComponent with HasGameReference<HoldLabsGame> {
   Level(this.levelId);
 
   final int levelId;
-  late final Player _player;
+  late final Player player;
   final _loadedAudio = <String>[];
 
   @override
@@ -66,9 +67,9 @@ class Level extends PositionComponent with HasGameReference<HoldLabsGame> {
             await add(portal);
 
             if (object.class_ == 'Start') {
-              _player = Player(position: object.position, priority: 1);
-              await add(_player);
-              game.camera.follow(_player.cameraTarget);
+              player = Player(position: object.position, priority: 1);
+              await add(player);
+              game.camera.follow(player.cameraTarget);
             } else {
               final portalHitbox = RectangleHitbox(
                 collisionType: CollisionType.passive,
@@ -123,6 +124,10 @@ class Level extends PositionComponent with HasGameReference<HoldLabsGame> {
               }
             }
             break;
+          case 'Guns':
+            final gunsPickup = GunPickup(position: object.position);
+            await add(gunsPickup);
+            break;
         }
       }
     }
@@ -191,15 +196,15 @@ class Level extends PositionComponent with HasGameReference<HoldLabsGame> {
                 .last;
             if (audioPath != null) {
               FlameAudio.bgm.pause();
-              _player.moveLock = true;
+              player.moveLock = true;
 
               await FlameAudio.audioCache.load(audioPath);
               _loadedAudio.add(audioPath);
 
               final audioplayer = await FlameAudio.playLongAudio(audioPath);
               audioplayer.onPlayerComplete.listen(
                 (event) {
-                  _player.moveLock = false;
+                  player.moveLock = false;
                   FlameAudio.bgm.resume();
                 },
               );
@@ -260,12 +265,12 @@ class Level extends PositionComponent with HasGameReference<HoldLabsGame> {
 
       if (holdInput) {
         FlameAudio.bgm.pause();
-        _player.moveLock = true;
+        player.moveLock = true;
       }
 
       final audioplayer = await FlameAudio.playLongAudio(filename);
       audioplayer.onPlayerComplete.listen((event) {
-        _player.moveLock = false;
+        player.moveLock = false;
         FlameAudio.bgm.resume();
       });
     }

lib/game/player.dart

@@ -1,17 +1,22 @@
 import 'dart:async';
+import 'dart:math';
 
 import 'package:flame/collisions.dart';
 import 'package:flame/components.dart';
 import 'package:flame/effects.dart';
+import 'package:flame/geometry.dart';
 import 'package:flame/sprite.dart';
 import 'package:flame_audio/flame_audio.dart';
 import 'package:flutter/services.dart';
 import 'package:hold_labs/game/game.dart';
+import 'package:hold_labs/game/gun_pickup.dart';
 import 'package:hold_labs/game/h_object.dart';
 import 'package:hold_labs/game/platform.dart';
 
 enum PlayerAnimation { idle, run, jump, hit }
 
+enum GunType { hot, cold }
+
 class Player extends PositionComponent
     with HasGameReference<HoldLabsGame>, CollisionCallbacks, KeyboardHandler {
   Player({super.position, super.priority}) : super(anchor: Anchor.center);
@@ -43,6 +48,14 @@ class Player extends PositionComponent
   double vAxisValue = 0;
 
   final cameraTarget = PositionComponent();
+  final _gunHolder = PositionComponent();
+  late final SpriteGroupComponent<GunType> _gunComponent;
+
+  bool hasGun = false;
+
+  RaycastResult<ShapeHitbox>? results;
+  GunType? get gunType => _gunComponent.current;
+  Vector2 get gunPosition => _gunComponent.absolutePosition;
 
   @override
   Future<void> onLoad() async {
@@ -88,6 +101,26 @@ class Player extends PositionComponent
         anchor: Anchor.center,
       ),
     );
+
+    _gunHolder.position = size * 0.5;
+    await add(_gunHolder);
+
+    _gunComponent = SpriteGroupComponent<GunType>(
+      current: GunType.hot,
+      position: Vector2(8, 0),
+      anchor: Anchor.center,
+      sprites: {
+        GunType.hot: Sprite(
+          game.images.fromCache('Guns.png'),
+          srcSize: Vector2.all(16),
+        ),
+        GunType.cold: Sprite(
+          game.images.fromCache('Guns.png'),
+          srcSize: Vector2.all(16),
+          srcPosition: Vector2(16, 0),
+        ),
+      },
+    );
   }
 
   @override
@@ -137,6 +170,10 @@ class Player extends PositionComponent
     if ((cameraTarget.position - absoluteCenter).length2 > 0.5) {
       cameraTarget.position.setValues(x, y);
     }
+
+    if (hasGun) {
+      _updateGunPosition();
+    }
   }
 
   @override
@@ -169,6 +206,10 @@ class Player extends PositionComponent
 
         position += separationVector;
       }
+    } else if (other is GunPickup) {
+      other.removeFromParent();
+      hasGun = true;
+      _addGuns();
     }
     super.onCollision(intersectionPoints, other);
   }
@@ -190,4 +231,50 @@ class Player extends PositionComponent
     }
     return true;
   }
+
+  void _addGuns() {
+    _gunHolder.add(_gunComponent);
+  }
+
+  void _updateGunPosition() {
+    if (_gunComponent.isMounted) {
+      final dir = game.mousePosition - position;
+      _gunHolder.angle =
+          (-dir.angleToSigned(_upVector)) * scale.x.sign - (pi * 0.5);
+
+      if (game.isFiring) {
+        final maxDistance = dir.normalize();
+
+        final ray = Ray2(
+          origin: _gunComponent.absolutePosition,
+          direction: dir,
+        );
+
+        results = game.collisionDetection
+            .raycast(ray, maxDistance: maxDistance, out: results);
+        if (results?.isActive ?? false) {
+          final other = results!.hitbox?.parent;
+          if (other is HObject) {
+            switch (_gunComponent.current) {
+              case GunType.hot:
+                other.isCooling = false;
+                other.isHeating = true;
+                break;
+              case GunType.cold:
+                other.isCooling = true;
+                other.isHeating = false;
+                break;
+              case null:
+                break;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  void switchGun() {
+    _gunComponent.current =
+        _gunComponent.current == GunType.cold ? GunType.hot : GunType.cold;
+  }
 }

tiled-project/Level3.tmx

@@ -92,7 +92,7 @@
   </object>
  </objectgroup>
  <objectgroup id="3" name="Colliders">
-  <object id="10" name="HObject" type="HObject" x="640" y="320" width="64" height="48">
+  <object id="10" name="HObject" type="HObject" x="640" y="304" width="64" height="80">
    <properties>
     <property name="AtomicSize" type="float" value="5"/>
     <property name="HotHeight" type="object" value="32"/>