projectile.js

class Projectile {
    constructor(x, y, vx, vy, damage) {
        this.x = x;
        this.y = y;
        this.vx = vx;
        this.vy = vy;
        this.radius = 5;
        this.damage = damage;
    }

    update(deltaTime) {
        this.x += this.vx * deltaTime;
        this.y += this.vy * deltaTime;
    }

    draw(ctx) {
        ctx.beginPath();
        ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
        ctx.fillStyle = '#ffff00';
        ctx.fill();
        ctx.strokeStyle = '#ffa500';
        ctx.lineWidth = 2;
        ctx.stroke();
    }

    checkCollision(object) {
        const dx = this.x - object.x;
        const dy = this.y - object.y;
        const distance = Math.sqrt(dx * dx + dy * dy);
        return distance < this.radius + object.radius;
    }

    isOffScreen(width, height) {
        return this.x < -this.radius || 
               this.x > width + this.radius || 
               this.y < -this.radius || 
               this.y > height + this.radius;
    }
}