Fixes to plates, disengage doors

public/coffee/models/PlateEntity.coffee

@@ -2,6 +2,8 @@ define ['cs!models/StaticEntity', 'image!/img/level-asset-pressure-plate.png'],
 
  class PlateEntity extends StaticEntity
 
+ active: false
+
  template:
  active: false
  height: .4
@@ -15,9 +17,13 @@ define ['cs!models/StaticEntity', 'image!/img/level-asset-pressure-plate.png'],
 
  onTick: =>
  if @isActivated()
+ @active = true
  @canvas.trigger @entity.$target + '.open'
  @entity.sprite 1, 0
  else
+ if @active
+ @canvas.trigger @entity.$target + '.disengage'
+ @active = false
  @canvas.trigger @entity.$target + '.close'
  @entity.sprite 0, 0
 
@@ -26,7 +32,7 @@ define ['cs!models/StaticEntity', 'image!/img/level-asset-pressure-plate.png'],
  width = @entity._ops.width
  height = @entity._ops.height
  x1 = pos.x - width / 2
- y2 = pos.y - height / 2 - .1
+ y2 = pos.y - height / 2
  x2 = pos.x + width / 2
  y1 = y2 - height
  return @world.find(x1, y1, x2, y2).length