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# Copyright 2018-2021 The glTF-Blender-IO authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import bpy
from math import pi
from ..com.gltf2_blender_extras import set_extras
from io_scene_gltf2.io.imp.gltf2_io_user_extensions import import_user_extensions
class BlenderLight():
"""Blender Light."""
def __new__(cls, *args, **kwargs):
raise RuntimeError("%s should not be instantiated" % cls)
@staticmethod
def create(gltf, vnode, light_id):
"""Light creation."""
pylight = gltf.data.extensions['KHR_lights_punctual']['lights'][light_id]
import_user_extensions('gather_import_light_before_hook', gltf, vnode, pylight)
if pylight['type'] == "directional":
light = BlenderLight.create_directional(gltf, light_id)
elif pylight['type'] == "point":
light = BlenderLight.create_point(gltf, light_id)
elif pylight['type'] == "spot":
light = BlenderLight.create_spot(gltf, light_id)
if 'color' in pylight.keys():
light.color = pylight['color']
if 'intensity' in pylight.keys():
light.energy = pylight['intensity']
# TODO range
set_extras(light, pylight.get('extras'))
return light
@staticmethod
def create_directional(gltf, light_id):
pylight = gltf.data.extensions['KHR_lights_punctual']['lights'][light_id]
if 'name' not in pylight.keys():
pylight['name'] = "Sun"
sun = bpy.data.lights.new(name=pylight['name'], type="SUN")
return sun
@staticmethod
def create_point(gltf, light_id):
pylight = gltf.data.extensions['KHR_lights_punctual']['lights'][light_id]
if 'name' not in pylight.keys():
pylight['name'] = "Point"
point = bpy.data.lights.new(name=pylight['name'], type="POINT")
return point
@staticmethod
def create_spot(gltf, light_id):
pylight = gltf.data.extensions['KHR_lights_punctual']['lights'][light_id]
if 'name' not in pylight.keys():
pylight['name'] = "Spot"
spot = bpy.data.lights.new(name=pylight['name'], type="SPOT")
# Angles
if 'spot' in pylight.keys() and 'outerConeAngle' in pylight['spot']:
spot.spot_size = pylight['spot']['outerConeAngle'] * 2
else:
spot.spot_size = pi / 2
if 'spot' in pylight.keys() and 'innerConeAngle' in pylight['spot']:
spot.spot_blend = 1 - ( pylight['spot']['innerConeAngle'] / pylight['spot']['outerConeAngle'] )
else:
spot.spot_blend = 1.0
return spot
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