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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| ### | ||
| Author: Jamis Buck <jamis@jamisbuck.org> | ||
| License: Public domain, baby. Knock yourself out. | ||
| The original CoffeeScript sources are always available on GitHub: | ||
| http://github.com/jamis/csmazes | ||
| ### | ||
|
|
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| class Maze.Wilson extends Maze | ||
| IN: 0x10 | ||
|
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| constructor: (width, height, options) -> | ||
| super | ||
| @state = 0 | ||
| @remaining = @width * @height | ||
| @visits = {} | ||
|
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| isCurrent: (x, y) -> @x == x && @y == y | ||
| isVisited: (x, y) -> @visits["#{x}:#{y}"]? | ||
|
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| addVisit: (x, y, dir) -> @visits["#{x}:#{y}"] = dir ? 0 | ||
| exitTaken: (x, y) -> @visits["#{x}:#{y}"] | ||
|
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| startStep: -> | ||
| x = @rand.nextInteger(@width) | ||
| y = @rand.nextInteger(@height) | ||
| @carve x, y, @IN | ||
| @callback this, x, y | ||
| @remaining-- | ||
| @state = 1 | ||
|
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| startWalkStep: -> | ||
| @visits = {} | ||
|
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| loop | ||
| @x = @rand.nextInteger(@width) | ||
| @y = @rand.nextInteger(@height) | ||
| if @isBlank(@x, @y) | ||
| @state = 2 | ||
| @start = x: @x, y: @y | ||
| @addVisit @x, @y | ||
| @callback this, @x, @y | ||
| break | ||
|
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| walkStep: -> | ||
| for direction in @randomDirections() | ||
| nx = @x + Maze.Direction.dx[direction] | ||
| ny = @y + Maze.Direction.dy[direction] | ||
|
|
||
| if @isValid(nx, ny) | ||
| [x, y, @x, @y] = [@x, @y, nx, ny] | ||
| @addVisit x, y, direction | ||
| @callback this, x, y | ||
| @callback this, nx, ny | ||
|
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| unless @isBlank(nx, ny) | ||
| @x = @start.x | ||
| @y = @start.y | ||
| @state = 3 | ||
|
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| break | ||
|
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| resetVisits: -> | ||
| for key, dir of @visits | ||
| [x, y] = key.split(":") | ||
| delete @visits[key] | ||
| @callback this, x, y | ||
|
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| runStep: -> | ||
| if @remaining > 0 | ||
| dir = @exitTaken(@x, @y) | ||
| nx = @x + Maze.Direction.dx[dir] | ||
| ny = @y + Maze.Direction.dy[dir] | ||
|
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| unless @isBlank(nx, ny) | ||
| @resetVisits() | ||
| @state = 1 | ||
|
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| @carve @x, @y, dir | ||
| @carve nx, ny, Maze.Direction.opposite[dir] | ||
|
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| [x, y, @x, @y] = [@x, @y, nx, ny] | ||
|
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| if @state == 1 | ||
| delete @x | ||
| delete @y | ||
|
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| @callback this, x, y | ||
| @callback this, nx, ny | ||
|
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| @remaining-- | ||
|
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| return @remaining > 0 | ||
|
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| step: -> | ||
| if @remaining > 0 | ||
| switch @state | ||
| when 0 then @startStep() | ||
| when 1 then @startWalkStep() | ||
| when 2 then @walkStep() | ||
| when 3 then @runStep() | ||
|
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| return @remaining > 0 |