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https://github.com/codeninjasllc/codecombat.git
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105 lines
3.6 KiB
CoffeeScript
105 lines
3.6 KiB
CoffeeScript
###
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* Stage
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** surfaceLayer
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*** Land texture
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*** Ground-based selection/target marks, range radii
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*** Walls/obstacles
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*** Paths and target pieces (and ghosts?)
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*** Normal Thangs, bots, wizards (z-indexing based on World-determined sprite.thang.pos.z/y, mainly, instead of sprite-map-determined sprite.z, which we rename to... something)
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*** Above-thang marks (blood, highlight) and health bars
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*** Camera border
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** surfaceTextLayer (speech, names)
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** screenLayer
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*** Letterbox
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**** Letterbox top and bottom
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*** FPS display, maybe grid axis labels, coordinate hover
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** Grid lines--somewhere--we will figure it out, do not really need it at first
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###
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module.exports = class Layer extends createjs.Container
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@TRANSFORM_CHILD = 'child' # Layer transform is managed by its parents
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@TRANSFORM_SURFACE = 'surface' # Layer moves/scales/zooms with the Surface of the World
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@TRANSFORM_SURFACE_TEXT = 'surface_text' # Layer moves with the Surface but is size-independent
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@TRANSFORM_SCREEN = 'screen' # Layer stays fixed to the screen (different from child?)
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subscriptions:
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'camera:zoom-updated': 'onZoomUpdated'
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constructor: (options) ->
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super()
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@initialize()
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options ?= {}
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@name = options.name ? 'Unnamed'
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@layerPriority = options.layerPriority ? 0
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@transformStyle = options.transform ? Layer.TRANSFORM_CHILD
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@camera = options.camera
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console.error @toString(), 'needs a camera.' unless @camera
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@updateLayerOrder = _.throttle @updateLayerOrder, 1000 / 30 # Don't call multiple times in one frame; 30 FPS is probably good enough
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Backbone.Mediator.subscribe(channel, @[func], @) for channel, func of @subscriptions
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destroy: ->
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child.destroy?() for child in @children
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Backbone.Mediator.unsubscribe(channel, @[func], @) for channel, func of @subscriptions
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delete @updateLayerOrder
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toString: -> "<Layer #{@layerPriority}: #{@name}>"
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addChild: (children...) ->
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super children...
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if @transformStyle is Layer.TRANSFORM_SURFACE_TEXT
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for child in children
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child.scaleX /= @scaleX
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child.scaleY /= @scaleY
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removeChild: (children...) ->
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super children...
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if @transformStyle is Layer.TRANSFORM_SURFACE_TEXT
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for child in children
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child.scaleX *= @scaleX
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child.scaleY *= @scaleY
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updateLayerOrder: =>
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#console.log @, @toString(), 'sorting children', _.clone @children if @name is 'Default'
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@sortChildren @layerOrderComparator
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layerOrderComparator: (a, b) ->
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# Optimize
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alp = a.layerPriority or 0
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blp = b.layerPriority or 0
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return alp - blp if alp isnt blp
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# TODO: remove this z stuff
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az = a.z or 1000
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bz = b.z or 1000
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if aSprite = a.sprite
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if aThang = aSprite.thang
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aPos = aThang.pos
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if aThang.health < 0
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--az
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if bSprite = b.sprite
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if bThang = bSprite.thang
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bPos = bThang.pos
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if bThang.health < 0
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--bz
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if az is bz
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return 0 unless aPos and bPos
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return (bPos.y - aPos.y) or (bPos.x - aPos.x)
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return az - bz
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onZoomUpdated: (e) ->
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return unless e.camera is @camera
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if @transformStyle in [Layer.TRANSFORM_SURFACE, Layer.TRANSFORM_SURFACE_TEXT]
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change = @scaleX / e.zoom
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@scaleX = @scaleY = e.zoom
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@regX = e.surfaceViewport.x
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@regY = e.surfaceViewport.y
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if @transformStyle is Layer.TRANSFORM_SURFACE_TEXT
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for child in @children
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child.scaleX *= change
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child.scaleY *= change
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cache: ->
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return unless @children.length
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bounds = @getBounds()
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return unless bounds
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super bounds.x, bounds.y, bounds.width, bounds.height, 2
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