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# SPDX-License-Identifier: GPL-2.0-or-later
# author Daniel Schalla, maintained by meta-androcto
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committed
bl_info = {
"name": "Tri-lighting",
"author": "Daniel Schalla",
"version": (0, 1, 4),
"blender": (2, 80, 0),
"location": "View3D > Add > Lights",
"description": "Add 3 Point Lighting to Selected / Active Object",
"warning": "",
"tracker_url": "https://developer.blender.org/maniphest/task/edit/form/2/",
"doc_url": "{BLENDER_MANUAL_URL}/addons/lighting/trilighting.html",
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"category": "Lighting",
}
import bpy
from bpy.types import Operator
from bpy.props import (
EnumProperty,
FloatProperty,
IntProperty,
)
from math import (
sin, cos,
radians,
sqrt,
)
class OBJECT_OT_TriLighting(Operator):
bl_idname = "object.trilighting"
bl_label = "Tri-Lighting Creator"
bl_description = ("Add 3 Point Lighting to Selected / Active Object\n"
"Needs an existing Active Object")
bl_options = {'REGISTER', 'UNDO'}
COMPAT_ENGINES = {'CYCLES', 'EEVEE'}
height: FloatProperty(
name="Height",
default=5
)
distance: FloatProperty(
name="Distance",
default=5,
min=0.1,
subtype="DISTANCE"
)
energy: IntProperty(
name="Base Energy",
default=3,
min=1
)
contrast: IntProperty(
name="Contrast",
default=50,
min=-100, max=100,
subtype="PERCENTAGE"
)
leftangle: IntProperty(
name="Left Angle",
default=26,
min=1, max=90,
subtype="ANGLE"
)
rightangle: IntProperty(
name="Right Angle",
default=45,
min=1, max=90,
subtype="ANGLE"
)
backangle: IntProperty(
name="Back Angle",
default=235,
min=90, max=270,
subtype="ANGLE"
)
Light_Type_List = [
('POINT', "Point", "Point Light"),
('SUN', "Sun", "Sun Light"),
('SPOT', "Spot", "Spot Light"),
('AREA', "Area", "Area Light")
]
primarytype: EnumProperty(
attr='tl_type',
name="Key Type",
description="Choose the types of Key Lights you would like",
items=Light_Type_List,
default='AREA'
)
secondarytype: EnumProperty(
attr='tl_type',
name="Fill + Back Type",
description="Choose the types of secondary Lights you would like",
items=Light_Type_List,
default="AREA"
)
@classmethod
def poll(cls, context):
return context.active_object is not None
def draw(self, context):
layout = self.layout
layout.label(text="Position:")
col = layout.column(align=True)
col.prop(self, "height")
col.prop(self, "distance")
layout.label(text="Light:")
col = layout.column(align=True)
col.prop(self, "energy")
col.prop(self, "contrast")
layout.label(text="Orientation:")
col = layout.column(align=True)
col.prop(self, "leftangle")
col.prop(self, "rightangle")
col.prop(self, "backangle")
col = layout.column()
col.label(text="Key Light Type:")
col.prop(self, "primarytype", text="")
col.label(text="Fill + Back Type:")
col.prop(self, "secondarytype", text="")
def execute(self, context):
try:
collection = context.collection
scene = context.scene
view = context.space_data
if view.type == 'VIEW_3D':
camera = view.camera
else:
camera = scene.camera
if (camera is None):
cam_data = bpy.data.cameras.new(name='Camera')
cam_obj = bpy.data.objects.new(name='Camera', object_data=cam_data)
collection.objects.link(cam_obj)
scene.camera = cam_obj
bpy.ops.view3d.camera_to_view()
camera = cam_obj
# Leave camera view again, otherwise redo does not work correctly.
bpy.ops.view3d.view_camera()
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obj = bpy.context.view_layer.objects.active
# Calculate Energy for each Lamp
if(self.contrast > 0):
keyEnergy = self.energy
backEnergy = (self.energy / 100) * abs(self.contrast)
fillEnergy = (self.energy / 100) * abs(self.contrast)
else:
keyEnergy = (self.energy / 100) * abs(self.contrast)
backEnergy = self.energy
fillEnergy = self.energy
# Calculate Direction for each Lamp
# Calculate current Distance and get Delta
obj_position = obj.location
cam_position = camera.location
delta_position = cam_position - obj_position
vector_length = sqrt(
(pow(delta_position.x, 2) +
pow(delta_position.y, 2) +
pow(delta_position.z, 2))
)
if not vector_length:
# division by zero most likely
self.report({'WARNING'},
"Operation Cancelled. No viable object in the scene")
return {'CANCELLED'}
single_vector = (1 / vector_length) * delta_position
# Calc back position
singleback_vector = single_vector.copy()
singleback_vector.x = cos(radians(self.backangle)) * single_vector.x + \
(-sin(radians(self.backangle)) * single_vector.y)
singleback_vector.y = sin(radians(self.backangle)) * single_vector.x + \
(cos(radians(self.backangle)) * single_vector.y)
backx = obj_position.x + self.distance * singleback_vector.x
backy = obj_position.y + self.distance * singleback_vector.y
backData = bpy.data.lights.new(name="TriLamp-Back", type=self.secondarytype)
backData.energy = backEnergy
backLamp = bpy.data.objects.new(name="TriLamp-Back", object_data=backData)
collection.objects.link(backLamp)
backLamp.location = (backx, backy, self.height)
trackToBack = backLamp.constraints.new(type="TRACK_TO")
trackToBack.target = obj
trackToBack.track_axis = "TRACK_NEGATIVE_Z"
trackToBack.up_axis = "UP_Y"
# Calc right position
singleright_vector = single_vector.copy()
singleright_vector.x = cos(radians(self.rightangle)) * single_vector.x + \
(-sin(radians(self.rightangle)) * single_vector.y)
singleright_vector.y = sin(radians(self.rightangle)) * single_vector.x + \
(cos(radians(self.rightangle)) * single_vector.y)
rightx = obj_position.x + self.distance * singleright_vector.x
righty = obj_position.y + self.distance * singleright_vector.y
rightData = bpy.data.lights.new(name="TriLamp-Fill", type=self.secondarytype)
rightData.energy = fillEnergy
rightLamp = bpy.data.objects.new(name="TriLamp-Fill", object_data=rightData)
collection.objects.link(rightLamp)
rightLamp.location = (rightx, righty, self.height)
trackToRight = rightLamp.constraints.new(type="TRACK_TO")
trackToRight.target = obj
trackToRight.track_axis = "TRACK_NEGATIVE_Z"
trackToRight.up_axis = "UP_Y"
# Calc left position
singleleft_vector = single_vector.copy()
singleleft_vector.x = cos(radians(-self.leftangle)) * single_vector.x + \
(-sin(radians(-self.leftangle)) * single_vector.y)
singleleft_vector.y = sin(radians(-self.leftangle)) * single_vector.x + \
(cos(radians(-self.leftangle)) * single_vector.y)
leftx = obj_position.x + self.distance * singleleft_vector.x
lefty = obj_position.y + self.distance * singleleft_vector.y
leftData = bpy.data.lights.new(name="TriLamp-Key", type=self.primarytype)
leftData.energy = keyEnergy
leftLamp = bpy.data.objects.new(name="TriLamp-Key", object_data=leftData)
collection.objects.link(leftLamp)
leftLamp.location = (leftx, lefty, self.height)
trackToLeft = leftLamp.constraints.new(type="TRACK_TO")
trackToLeft.target = obj
trackToLeft.track_axis = "TRACK_NEGATIVE_Z"
trackToLeft.up_axis = "UP_Y"
except Exception as e:
self.report({'WARNING'},
"Some operations could not be performed (See Console for more info)")
print("\n[Add Advanced Objects]\nOperator: "
"object.trilighting\nError: {}".format(e))
return {'CANCELLED'}
return {'FINISHED'}
def menu_func(self, context):
self.layout.operator(OBJECT_OT_TriLighting.bl_idname, text="3 Point Lights", icon='LIGHT')
# Register all operators and menu
def register():
bpy.utils.register_class(OBJECT_OT_TriLighting)
bpy.types.VIEW3D_MT_light_add.append(menu_func)
def unregister():
bpy.utils.unregister_class(OBJECT_OT_TriLighting)
bpy.types.VIEW3D_MT_light_add.remove(menu_func)
if __name__ == "__main__":
register()