def make_lights(light_spec=None, lname=None):
""" Create one point light and an ambient light."""
if lname is None:
lname = 'lights'
lights = NodePath(lname)
if light_spec is None:
# Create point lights
plight = PointLight('plight1')
light = lights.attachNewNode(plight)
plight.setColor((0.1, 0.1, 0.1, 1.0))
light.setPos((-2, -6, 4))
light.lookAt(0, 0, 0)
# Create ambient light
alight = AmbientLight('alight')
alight.setColor((1, 1, 1, 1.0))
lights.attachNewNode(alight)
else:
for lspec in light_spec:
light_type = lspec['type']
light_name = lspec['name']
assert light_type in ['AmbientLight', 'PointLight', 'DirectionalLight', 'SpotLight'], light_type
if light_type == 'AmbientLight':
light = AmbientLight(light_name)
light.setColor(lspec['color'])
lights.attachNewNode(light)
elif light_type == 'PointLight':
light = PointLight(light_name)
lights.attachNewNode(light)
light.setColor(lspec['color'])
light.setPoint(lspec['pos'])
elif light_type == 'DirectionalLight':
light = DirectionalLight(light_name)
lights.attachNewNode(light)
light.setColor(lspec['color'])
light.setPoint(lspec['pos'])
light.setDirection(lspec['direction'])
return lights
