Thang editor now sets some default Components when you change the kind of a ThangType.

app/models/LevelComponent.coffee

@@ -7,6 +7,10 @@ module.exports = class LevelComponent extends CocoModel
   @EquipsID: '53e217d253457600003e3ebb'
   @ItemID: '53e12043b82921000051cdf9'
   @AttacksID: '524b7ba57fc0f6d519000016'
+  @PhysicalID: '524b75ad7fc0f6d519000001'
+  @ExistsID: '524b4150ff92f1f4f8000024'
+  @LandID: '524b7aff7fc0f6d519000006'
+  @CollidesID: '524b7b857fc0f6d519000012'
   urlRoot: '/db/level.component'
 
   set: (key, val, options) ->

app/schemas/subscriptions/editor.coffee

@@ -45,3 +45,6 @@ module.exports =
 
   'editor:random-terrain-generated': c.object {required: ['thangs']},
     thangs: c.array {}, {type: 'object'}
+
+  'editor:thang-type-kind-changed': c.object {required: ['kind']},
+    kind: {type: 'string'}

app/views/editor/component/ThangComponentsEditView.coffee

@@ -12,6 +12,28 @@ nodes = require '../level/treema_nodes'
 ThangType = require 'models/ThangType'
 CocoCollection = require 'collections/CocoCollection'
 
+LC = (componentName, config) -> original: LevelComponent[componentName + 'ID'], majorVersion: 0, config: config
+DEFAULT_COMPONENTS =
+  Unit: [LC('Equips')]
+  Floor: [
+    LC('Exists', stateless: true)
+    LC('Physical', width: 20, height: 17, depth: 2, shape: 'sheet', pos: {x: 10, y: 8.5, z: 1})
+    LC('Land')
+  ]
+  Wall: [
+    LC('Exists', stateless: true)
+    LC('Physical', width: 4, height: 4, depth: 12, shape: 'box', pos: {x: 2, y: 2, z: 6})
+    LC('Collides', collisionType: 'static', collisionCategory: 'obstacles', mass: 1000, fixedRotation: true, restitution: 1)
+  ]
+  Doodad: [
+    LC('Exists', stateless: true)
+    LC('Physical')
+    LC('Collides', collisionType: 'static', fixedRotation: true)
+  ]
+  Misc: [LC('Exists'), LC('Physical')]
+  Mark: []
+  Item: [LC('Item')]
+
 class ItemThangTypeSearchCollection extends CocoCollection
   url: '/db/thang.type?view=items&project=original,name,version,slug,kind,components'
   model: ThangType
@@ -20,6 +42,9 @@ module.exports = class ThangComponentsEditView extends CocoView
   id: 'thang-components-edit-view'
   template: template
 
+  subscriptions:
+    'editor:thang-type-kind-changed': 'onThangTypeKindChanged'
+
   events:
     'click #add-components-button': 'onAddComponentsButtonClicked'
 
@@ -345,6 +370,12 @@ module.exports = class ThangComponentsEditView extends CocoView
       @components = @components.concat(sparseComponents)
       @onComponentsChanged()
 
+  onThangTypeKindChanged: (e) ->
+    return unless defaultComponents = DEFAULT_COMPONENTS[e.kind]
+    for component in defaultComponents when not _.find(@components, original: component.original)
+      @components.push component
+      @onComponentsAdded()
+
   destroy: ->
     @componentsTreema?.destroy()
     super()

app/views/editor/level/thangs/ThangsTabView.coffee

@@ -15,11 +15,6 @@ ComponentsCollection = require 'collections/ComponentsCollection'
 MOVE_MARGIN = 0.15
 MOVE_SPEED = 13
 
-# Essential component original ids
-componentOriginals =
-  'existence.Exists': '524b4150ff92f1f4f8000024'
-  'physics.Physical': '524b75ad7fc0f6d519000001'
-
 # Let us place these on top of other Thangs
 overlappableThangTypeNames = ['Torch', 'Chains', 'Bird', 'Cloud 1', 'Cloud 2', 'Cloud 3', 'Waterfall', 'Obstacle']
 
@@ -229,8 +224,7 @@ module.exports = class ThangsTabView extends CocoView
     @surface.camera.dragDisabled = false
     return unless @selectedExtantThang and e.thang?.id is @selectedExtantThang?.id
     pos = @selectedExtantThang.pos
-    physicalOriginal = componentOriginals['physics.Physical']
-    path = "id=#{@selectedExtantThang.id}/components/original=#{physicalOriginal}"  # TODO: hack
+    path = "id=#{@selectedExtantThang.id}/components/original=#{LevelComponent.PhysicalID}"
     physical = @thangsTreema.get path
     return if not physical or (physical.config.pos.x is pos.x and physical.config.pos.y is pos.y)
     @thangsTreema.set path + '/config/pos', x: pos.x, y: pos.y, z: pos.z
@@ -319,11 +313,11 @@ module.exports = class ThangsTabView extends CocoView
 
   createEssentialComponents: (defaultComponents) ->
     physicalConfig = {pos: {x: 10, y: 10, z: 1}}
-    if physicalOriginal = _.find(defaultComponents ? [], original: componentOriginals['physics.Physical'])
+    if physicalOriginal = _.find(defaultComponents ? [], original: LevelComponent.PhysicalID)
       physicalConfig.pos.z = physicalOriginal.config?.pos?.z ? 1  # Get the z right
     [
-      {original: componentOriginals['existence.Exists'], majorVersion: 0, config: {}}
-      {original: componentOriginals['physics.Physical'], majorVersion: 0, config: physicalConfig}
+      {original: LevelComponent.ExistsID, majorVersion: 0, config: {}}
+      {original: LevelComponent.PhysicalID, majorVersion: 0, config: physicalConfig}
     ]
 
   createAddThang: ->

app/views/editor/thang/ThangTypeEditView.coffee

@@ -380,6 +380,7 @@ module.exports = class ThangTypeEditView extends RootView
     el = @$el.find('#thang-type-treema')
     @treema = @$el.find('#thang-type-treema').treema(options)
     @treema.build()
+    @lastKind = data.kind
 
   pushChangesToPreview: =>
     # TODO: This doesn't delete old Treema keys you deleted
@@ -389,6 +390,9 @@ module.exports = class ThangTypeEditView extends RootView
     @refreshAnimation()
     @updateDots()
     @updatePortrait()
+    if (kind = @treema.data.kind) isnt @lastKind
+      @lastKind = kind
+      Backbone.Mediator.publish 'editor:thang-type-kind-changed', kind: kind
 
   onSelectNode: (e, selected) =>
     selected = selected[0]