initial commit

resources/js/game/WitchProjectile.js

@@ -0,0 +1,49 @@
+import { GameObject } from '../engine/GameObject.js';
+import { Vector2D } from '../engine/Vector2D.js';
+
+export class WitchProjectile extends GameObject {
+  constructor(
+    x,
+    y,
+    direction,
+    { container, viewport, speed = 220, size = 12, color = [0.7, 0.2, 1, 1] } = {},
+  ) {
+    super(x, y);
+    this.velocity = direction.mulS(speed);
+    this.container = container;
+    this.viewport = viewport;
+    this.size = size;
+    this.color = color;
+    this.width = size;
+    this.height = size;
+    this._time = 0;
+  }
+
+  update(dt) {
+    super.update(dt);
+    this._time += dt;
+
+    const { width, height } = this.viewport;
+    if (
+      this.pos.x < -this.size ||
+      this.pos.x > width + this.size ||
+      this.pos.y < -this.size ||
+      this.pos.y > height + this.size
+    ) {
+      this.remove(this.container);
+    }
+  }
+
+  draw(renderer) {
+    const pulse = 1 + 0.15 * Math.sin(this._time * 12);
+    const s = this.size * pulse;
+    renderer.drawTexture(
+      renderer.whiteTexture,
+      this.pos.x - s / 2,
+      this.pos.y - s / 2,
+      s,
+      s,
+      this.color,
+    );
+  }
+}