js怎么做碰撞检测

function isColliding(rect1, rect2) {
    return !(rect1.x > rect2.x + rect2.width ||
             rect1.x + rect1.width < rect2.x ||
             rect1.y > rect2.y + rect2.height ||
             rect1.y + rect1.height < rect2.y);
}

// 示例对象
const obj1 = { x: 10, y: 10, width: 50, height: 50 };
const obj2 = { x: 40, y: 40, width: 50, height: 50 };

console.log(isColliding(obj1, obj2)); // true

function circleCollision(circle1, circle2) {
    const dx = circle1.x - circle2.x;
    const dy = circle1.y - circle2.y;
    const distance = Math.sqrt(dx * dx + dy * dy);
    return distance < circle1.radius + circle2.radius;
}

// 示例对象
const circle1 = { x: 50, y: 50, radius: 20 };
const circle2 = { x: 70, y: 70, radius: 20 };

console.log(circleCollision(circle1, circle2)); // true

function polygonCollision(poly1, poly2) {
    // 实现分离轴定理的逻辑
    // 这里省略具体实现，实际应用中需要详细计算
    return false; // 示例返回值
}

// 示例多边形
const poly1 = [{x:0, y:0}, {x:10, y:0}, {x:10, y:10}, {x:0, y:10}];
const poly2 = [{x:5, y:5}, {x:15, y:5}, {x:15, y:15}, {x:5, y:15}];

console.log(polygonCollision(poly1, poly2)); // true