def __init__(self, renderer):
'''Creates a new scene graph
Keyword arguments:
renderer -- the main renderer
'''
self.rootNode = RootNode()
self.renderer = renderer
width = renderer.displaySurface.get_width()
height = renderer.displaySurface.get_height()
self.camera = CameraNode(width, height)
self.viewRect = Rect(0, 0, 0, 0)
#Dictionary mapping actor ID to scene nodes
self.actorIDToNode = {}
eventManager = ECOM.eventManager
eventManager.addListener(self.newRenderComponent, Event_NewRenderComponent.eventType)
eventManager.addListener(self.actorMoved, Event_ActorMoved.eventType)
eventManager.addListener(self.screenResize, Event_ScreenResize.eventType)
eventManager.addListener(self.playAnimation, Event_PlayAnimation.eventType)
eventManager.addListener(self.destroyActor, Event_ActorDestroyed.eventType)
class Scene:
'''Main scene graph'''
def __init__(self, renderer):
'''Creates a new scene graph
Keyword arguments:
renderer -- the main renderer
'''
self.rootNode = RootNode()
self.renderer = renderer
width = renderer.displaySurface.get_width()
height = renderer.displaySurface.get_height()
self.camera = CameraNode(width, height)
self.viewRect = Rect(0, 0, 0, 0)
#Dictionary mapping actor ID to scene nodes
self.actorIDToNode = {}
eventManager = ECOM.eventManager
eventManager.addListener(self.newRenderComponent, Event_NewRenderComponent.eventType)
eventManager.addListener(self.actorMoved, Event_ActorMoved.eventType)
eventManager.addListener(self.screenResize, Event_ScreenResize.eventType)
eventManager.addListener(self.playAnimation, Event_PlayAnimation.eventType)
eventManager.addListener(self.destroyActor, Event_ActorDestroyed.eventType)
def cleanUp(self):
eventManager = ECOM.eventManager
eventManager.removeListener(self.newRenderComponent, Event_NewRenderComponent.eventType)
eventManager.removeListener(self.actorMoved, Event_ActorMoved.eventType)
eventManager.removeListener(self.screenResize, Event_ScreenResize.eventType)
eventManager.removeListener(self.playAnimation, Event_PlayAnimation.eventType)
eventManager.removeListener(self.destroyActor, Event_ActorDestroyed.eventType)
def findNode(self, actorID):
if actorID in self.actorIDToNode.keys():
return self.actorIDToNode[actorID]
return None
def addNode(self, actorID, child):
self.actorIDToNode[actorID] = child
self.rootNode.addChild(child)
def attachAtNode(self, actorID, node):
self.actorIDToNode[node.actorID] = node
parentNode = self.findNode(actorID)
parentNode.addChild(node)
def render(self):
self.viewRect = self.camera.viewRect
self.rootNode.render(self)
def newRenderComponent(self, event):
if event.toParent:
self.attachAtNode(event.actorID, event.sceneNode)
else:
self.addNode(event.actorID, event.sceneNode)
def actorMoved(self, event):
node = self.findNode(event.actorID)
if node is not None:
node.setPosition(event.pos)
node.setRotation(event.angle)
def destroyActor(self, event):
self.rootNode.removeChild(event.actorID)
del self.actorIDToNode[event.actorID]
def screenResize(self, event):
self.camera.resizeViewRect(event.width, event.height)
def playAnimation(self, event):
node = self.actorIDToNode[event.actorID]
if hasattr(node, 'animation'):
if node.name == event.name:
node.playAnimation()
else:
for child in node.children:
if hasattr(child, 'animation'):
if child.name == event.name:
child.playAnimation()
