Add Krake boss with ink, pull marks and sweep tentacles plus boss mode

web/src/InkBlob.ts

@@ -0,0 +1,74 @@
+import * as THREE from 'three';
+import type { Game } from './Game';
+
+const SPEED = 8;
+const PLAYER_PROXIMITY = 1.4;
+
+export class InkBlob {
+  body: THREE.Group;
+  target: THREE.Vector3;
+  private vel: THREE.Vector3;
+  private life = 6;
+  dead = false;
+  nearPlayer = false;
+
+  constructor(from: THREE.Vector3, target: THREE.Vector3) {
+    this.target = target.clone();
+    this.body = new THREE.Group();
+    this.body.position.copy(from);
+
+    this.vel = new THREE.Vector3().subVectors(target, from);
+    this.vel.y = 0;
+    const dist = this.vel.length();
+    if (dist > 0.01) {
+      this.vel.normalize().multiplyScalar(SPEED);
+    }
+
+    const glowMat = new THREE.MeshBasicMaterial({
+      color: 0xaa44ff,
+      transparent: true,
+      opacity: 0.5,
+      blending: THREE.AdditiveBlending,
+      depthWrite: false,
+    });
+    const glow = new THREE.Mesh(new THREE.SphereGeometry(0.5, 12, 12), glowMat);
+    this.body.add(glow);
+
+    const coreMat = new THREE.MeshToonMaterial({ color: 0x3a1060 });
+    const core = new THREE.Mesh(new THREE.SphereGeometry(0.28, 10, 10), coreMat);
+    this.body.add(core);
+  }
+
+  update(dt: number, game: Game): boolean {
+    this.life -= dt;
+    this.body.position.x += this.vel.x * dt;
+    this.body.position.z += this.vel.z * dt;
+    this.body.position.y = 1.2 + Math.sin(this.life * 4) * 0.1;
+
+    if (game.player.health > 0 && !this.nearPlayer) {
+      const dist = this.body.position.distanceTo(game.player.body.position);
+      if (dist < PLAYER_PROXIMITY) {
+        this.nearPlayer = true;
+        game.triggerInkVignette();
+      }
+    }
+
+    const dx = this.target.x - this.body.position.x;
+    const dz = this.target.z - this.body.position.z;
+    if (this.life <= 0 || dx * dx + dz * dz < 0.25) {
+      this.dead = true;
+      return false;
+    }
+    return true;
+  }
+
+  dispose() {
+    this.body.removeFromParent();
+    for (const child of [...this.body.children]) {
+      if (child instanceof THREE.Mesh) {
+        child.geometry.dispose();
+        (child.material as THREE.Material).dispose();
+      }
+    }
+  }
+}