如何在Golang中创建一个三维数组

Question

我正在尝试创建一个包含块的三维数组(如rubiks-cube).

我尝试了很多东西,但我无法让它发挥作用.

func generateTiles(x int, y int, z int) [][][]*tile{
  var tiles [][][]*tile

  // Something here
  // resulting in a x by y by z array
  // filled with *tile

  return tiles
}

有什么建议？

Answer 1

您必须自己初始化每个图层.示例(正在播放):

tiles = make([][][]*tile, x)

for i := range tiles {
    tiles[i] = make([][]*tile, y)
    for j := range tiles[i] {
        tiles[i][j] = make([]*tile, z)
    }
}

Answer 2

出于性能原因，我个人会使用一维切片，我将其添加为替代方案：

type Tile struct {
    x, y, z int
}

type Tiles struct {
    t       []*Tile
    w, h, d int
}

func New(w, h, d int) *Tiles {
    return &Tiles{
        t: make([]*Tile, w*h*d),
        w: w,
        h: h,
        d: d,
    }
}

// indexing based on http://stackoverflow.com/a/20266350/145587
func (t *Tiles) At(x, y, z int) *Tile {
    idx := t.h*t.w*z + t.w*y
    return t.t[idx+x]
}

func (t *Tiles) Set(x, y, z int, val *Tile) {
    idx := t.h*t.w*z + t.w*y
    t.t[idx+x] = val
}

func fillTiles(w int, h int, d int) *Tiles {
    tiles := New(w, h, d)

    for x := 0; x < w; x++ {
        for y := 0; y < h; y++ {
            for z := 0; z < d; z++ {
                tiles.Set(x, y, z, &Tile{x, y, z})
            }
        }
    }

    return tiles
}

playground