from panda3d.core import *
[docs]class DirectLight(NodePath):
[docs] def __init__(self, light, parent):
# Initialize the superclass
NodePath.__init__(self)
# Record light and name
self.light = light
# Attach node to self
self.assign(parent.attachNewNode(self.light))
[docs] def getName(self):
return self.light.getName()
[docs] def getLight(self):
return self.light
[docs]class DirectLights(NodePath):
[docs] def __init__(self, parent = None):
if parent is None:
parent = base.render
# Initialize the superclass
NodePath.__init__(self)
# Create a node for the lights
self.assign(parent.attachNewNode('DIRECT Lights'))
# Create a list of all active lights
self.lightDict = {}
# Counts of the various types of lights
self.ambientCount = 0
self.directionalCount = 0
self.pointCount = 0
self.spotCount = 0
def __getitem__(self, name):
return self.lightDict.get(name, None)
def __len__(self):
return len(self.lightDict)
[docs] def delete(self, light):
del self.lightDict[light.getName()]
self.setOff(light)
light.removeNode()
[docs] def deleteAll(self):
for light in self:
self.delete(light)
[docs] def asList(self):
return [self[n] for n in self.getNameList()]
[docs] def getNameList(self):
# Return a sorted list of all lights in the light dict
nameList = [x.getName() for x in self.lightDict.values()]
nameList.sort()
return nameList
[docs] def create(self, type):
type = type.lower()
if type == 'ambient':
self.ambientCount += 1
light = AmbientLight('ambient-' + repr(self.ambientCount))
light.setColor(VBase4(.3, .3, .3, 1))
elif type == 'directional':
self.directionalCount += 1
light = DirectionalLight('directional-' + repr(self.directionalCount))
light.setColor(VBase4(1))
elif type == 'point':
self.pointCount += 1
light = PointLight('point-' + repr(self.pointCount))
light.setColor(VBase4(1))
elif type == 'spot':
self.spotCount += 1
light = Spotlight('spot-' + repr(self.spotCount))
light.setColor(VBase4(1))
light.setLens(PerspectiveLens())
else:
print('Invalid light type')
return None
# Add the new light
directLight = DirectLight(light, self)
self.lightDict[directLight.getName()] = directLight
# Turn it on as a default
self.setOn(directLight)
# Send an event to all watching objects
messenger.send('DIRECT_addLight', [directLight])
# Return the new light
return directLight
[docs] def createDefaultLights(self):
self.create('ambient')
self.create('directional')
[docs] def allOn(self):
"""
Turn on all DIRECT lights
"""
for light in self.lightDict.values():
self.setOn(light)
# Make sure there is a default material
render.setMaterial(Material())
[docs] def allOff(self):
"""
Turn off all DIRECT lights
"""
for light in self.lightDict.values():
self.setOff(light)
[docs] def toggle(self):
"""
Toggles light attribute, but doesn't toggle individual lights
"""
if render.node().hasAttrib(LightAttrib.getClassType()):
self.allOff()
else:
self.allOn()
[docs] def setOn(self, directLight):
"""
Turn on the given directLight
"""
render.setLight(directLight)
[docs] def setOff(self, directLight):
"""
Turn off the given directLight
"""
render.clearLight(directLight)
