如何为船创建数据模型?

时间:2011-11-05 04:37:46

标签: javascript datamodel

如何在javascript中为船只创建模型,该模型在笛卡尔平面中作为网格参考存在?

我想通过创建流行游戏Battleship的克隆来学习javascript!

为此,我需要协助开始编程船只!

2 个答案:

答案 0 :(得分:5)

这是让你入门的东西:

function Boat(name, length) {
  this.name = name
  this.pegs = new Array(length)
  this.sunk = false
}

Boat.prototype.place = function (x, y, orientation) {
  // Before calling this method you'd need to confirm
  // that the position is legal (on the board and not
  // conflicting with the placement of existing ships).
  // `x` and `y` should reflect the coordinates of the
  // upper-leftmost peg position.
  for (var idx = 0, len = this.pegs.length; idx < len; idx++) {
    this.pegs[idx] = {x: x, y: y, hit: false}
    if (orientation == 'horizontal') x += 1
    else                             y += 1
  }
}

Boat.prototype.hit = function (x, y) {
  var sunk = true
  var idx = this.pegs.length
  while (idx--) {
    var peg = this.pegs[idx]
    if (peg.x == x && peg.y == y) peg.hit = true
    // If a peg has not been hit, the boat is not yet sunk!
    if (!peg.hit) sunk = false
  }
  return this.sunk = sunk // this is assignment, not comparison
}

用法:

var submarine = new Boat('submarine', 3)
submarine.place(2, 6, 'horizontal')
submarine.hit(2, 6) // false
submarine.hit(3, 6) // false
submarine.hit(4, 6) // true

将pegs作为具有xyhit键的对象存储不一定是最佳方法。例如,如果你想要聪明,可以将最左上角的坐标与方向一起存储。然后,命中可以存储在一个数组中。类似的东西:

name: 'submarine'
x: 2
y: 6
orientation: 'horizontal'
pegs: [0, 0, 0]

在(2,6)击中后,船的属性将是:

name: 'submarine'
x: 2
y: 6
orientation: 'horizontal'
pegs: [1, 0, 0]

答案 1 :(得分:0)

我开始创建一个阵列(或两个,每侧一个)来固定船只。这可以非常简单,只需使用船号作为&#34;填充&#34;的数组条目。位置。

我的船型将具有长度(n&#34;桩钉#34;),位置(x,y),方向(垂直或水平)和点击计数器。另一种选择是存储船只占据的每个阵列位置,这会使一些东西更容易。