Как сделать грамотное столкновение объектов?

Question

[Triborg-333]

Игра

https://codepen.io/CrystaZZ/pen/jONKZBd

Answer 1

[0xD34F]

const { position: { x, y }, cell_radius, food_size, food } = this;
const isIntersects = item =>
  (item.x - x) ** 2 + (item.y - y) ** 2 <= (cell_radius + food_size) ** 2;

food.splice(0, food.length, ...food.filter(n => !isIntersects(n)));

// или

for (let i = food.length; i--;) {
  if (isIntersects(food[i])) {
    food.splice(i, 1);
  }
}

// или

let countEaten = 0;

for (let i = 0; i < food.length; i++) {
  food[i - countEaten] = food[i];
  countEaten += isIntersects(food[i]);
}

food.length -= countEaten;

Comments

[Triborg-333]

Спасибо тебе большое =) Здоровья тебе !

Answer 2

[hzzzzl]

for (var i = 0; i < this.food.length; i++) {
  const {x: x1, y: y1} = this.position
  const r1 = this.cell_radius
  const {x: x2, y: y2} = this.food[i]
  const r2 = this.food_size

  const distance = Math.sqrt( (x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2) )
  const intersects = distance <= r1 + r2

  if(intersects) {
    console.log('I EAT', this.food[i])
  }
}