attack이 가장 가까운 enemy로 날아가도록

choar816 · May 31, 2022 · 4e05baf · 4e05baf
1 parent 3af86d1
commit 4e05baf
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Showing 2 changed files with 14 additions and 2 deletions.
diff --git a/src/effects/Beam.js b/src/effects/Beam.js
@@ -13,14 +13,23 @@ export default class Beam extends Phaser.Physics.Arcade.Image {
         scene.add.existing(this);
         scene.physics.world.enableBody(this);
         this.setCircle(30);
-        this.setVelocityY(-250);
+        this.setVelocity();
 
         scene.m_attacks.add(this);
         scene.m_beamSound.play();
 
         setTimeout(() => this.destroy(), Beam.DURATION);
     }
 
-    update() {
+    setVelocity() {
+      if (!this.scene.m_closest) {
+        this.setVelocityY(-250);
+        return;
+      }
+      const _x = this.scene.m_closest.x - this.x;
+      const _y = this.scene.m_closest.y - this.y;
+      const _r = Math.sqrt(_x*_x + _y*_y) / 2;
+      this.body.velocity.x = _x / _r * Beam.SPEED;
+      this.body.velocity.y = _y / _r * Beam.SPEED;
     }
 }
diff --git a/src/scenes/PlayingScene.js b/src/scenes/PlayingScene.js
@@ -56,6 +56,9 @@ export default class PlayingScene extends Phaser.Scene {
     // 마치 무한대 배경인 것처럼!
     this.m_background.tilePositionX = this.m_player.x - Config.width / 2;
     this.m_background.tilePositionY = this.m_player.y - Config.height / 2;
+
+    // attack -> 가장 가까운 enemy
+    this.m_closest = this.physics.closest(this.m_player, this.m_enemies.getChildren());
   }
 
   //////////////////////// FUNCTIONS ////////////////////////