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# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# #
# (c) Alessandro Zomparelli #
# (2020) #
# #
# http://www.co-de-it.com/ #
# #
################################################################################
import bpy
import numpy as np
import colorsys
from numpy import *
from bpy.types import (
Operator,
Panel
)
from bpy.props import (
BoolProperty,
EnumProperty,
FloatProperty,
IntProperty,
StringProperty,
FloatVectorProperty,
IntVectorProperty
)
from .utils import *
class random_materials(Operator):
bl_idname = "object.random_materials"
bl_label = "Random Materials"
bl_description = "Assign random materials to the faces of the mesh"
bl_options = {'REGISTER', 'UNDO'}
prefix : StringProperty(
name="Prefix", default="Random.", description="Name prefix")
color_A : FloatVectorProperty(name="Color A",
subtype='COLOR_GAMMA',
min=0,
max=1,
default=[0,0,0])
color_B : FloatVectorProperty(name="Color B",
subtype='COLOR_GAMMA',
min=0,
max=1,
default=[1,1,1])
hue : FloatProperty(name="Hue", min=0, max=1, default=0.5)
hue_variation : FloatProperty(name="Hue Variation", min=0, max=1, default=0.6)
seed : IntProperty(
name="Seed", default=0, description="Random seed")
count : IntProperty(
name="Count", default=3, min=2, description="Count of random materials")
generate_materials : BoolProperty(
name="Generate Materials", default=False, description="Automatically generates new materials")
random_colors : BoolProperty(
name="Random Colors", default=True, description="Colors are automatically generated")
executed = False
@classmethod
def poll(cls, context):
try: return context.object.type == 'MESH'
except: return False
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
col.prop(self, "seed")
col.prop(self, "generate_materials")
if self.generate_materials:
col.prop(self, "prefix")
col.separator()
col.prop(self, "count")
#row = col.row(align=True)
col.separator()
col.label(text='Colors:')
col.prop(self, "hue")
col.prop(self, "hue_variation")
#col.prop(self, "random_colors")
if not self.random_colors:
col.prop(self, "color_A")
col.prop(self, "color_B")
def execute(self, context):
bpy.ops.object.mode_set(mode='OBJECT')
ob = context.active_object
if len(ob.material_slots) == 0 and not self.executed:
self.generate_materials = True
if self.generate_materials:
colA = self.color_A
colB = self.color_B
h1 = (self.hue - self.hue_variation/2)
h2 = (self.hue + self.hue_variation/2)
count = self.count
ob.data.materials.clear()
materials = []
for i in range(count):
mat_name = '{}{:03d}'.format(self.prefix,i)
mat = bpy.data.materials.new(mat_name)
if self.random_colors:
mat.diffuse_color = colorsys.hsv_to_rgb((h1 + (h2-h1)/(count)*i)%1, 1, 1)[:] + (1,)
else:
mat.diffuse_color = list(colA + (colB - colA)/(count-1)*i) + [1]
ob.data.materials.append(mat)
else:
count = len(ob.material_slots)
np.random.seed(seed=self.seed)
n_faces = len(ob.data.polygons)
if count > 0:
rand = list(np.random.randint(count, size=n_faces))
ob.data.polygons.foreach_set('material_index',rand)
ob.data.update()
self.executed = True
return {'FINISHED'}
class weight_to_materials(Operator):
bl_idname = "object.weight_to_materials"
bl_label = "Weight to Materials"
bl_description = "Assign materials to the faces of the mesh according to the active Vertex Group"
bl_options = {'REGISTER', 'UNDO'}
prefix : StringProperty(
name="Prefix", default="Weight.", description="Name prefix")
hue : FloatProperty(name="Hue", min=0, max=1, default=0.5)
hue_variation : FloatProperty(name="Hue Variation", min=0, max=1, default=0.3)
count : IntProperty(
name="Count", default=3, min=2, description="Count of random materials")
generate_materials : BoolProperty(
name="Generate Materials", default=False, description="Automatically generates new materials")
mode : EnumProperty(
items=(
('MIN', "Min", "Use the min weight value"),
('MAX', "Max", "Use the max weight value"),
('MEAN', "Mean", "Use the mean weight value")
),
default='MEAN',
name="Mode"
)
vg = None
@classmethod
def poll(cls, context):
try: return context.object.type == 'MESH'
except: return False
def draw(self, context):
layout = self.layout
col = layout.column(align=True)
col.prop(self, "mode")
col.prop(self, "generate_materials")
if self.generate_materials:
col.prop(self, "prefix")
col.separator()
col.prop(self, "count")
#row = col.row(align=True)
col.separator()
col.label(text='Colors:')
col.prop(self, "hue")
col.prop(self, "hue_variation")
def execute(self, context):
ob = context.active_object
if self.vg == None:
self.vg = ob.vertex_groups.active_index
vg = ob.vertex_groups[self.vg]
if vg == None:
self.report({'ERROR'}, "The selected object doesn't have any Vertex Group")
return {'CANCELLED'}
weight = get_weight_numpy(vg, len(ob.data.vertices))
if self.generate_materials:
h1 = (self.hue - self.hue_variation/2)
h2 = (self.hue + self.hue_variation/2)
count = self.count
ob.data.materials.clear()
materials = []
for i in range(count):
mat_name = '{}{:03d}'.format(self.prefix,i)
mat = bpy.data.materials.new(mat_name)
mat.diffuse_color = colorsys.hsv_to_rgb((h1 + (h2-h1)/(count)*i)%1, 1, 1)[:] + (1,)
ob.data.materials.append(mat)
else:
count = len(ob.material_slots)
faces_weight = []
for p in ob.data.polygons:
verts_id = np.array([v for v in p.vertices])
face_weight = weight[verts_id]
if self.mode == 'MIN': w = face_weight.min()
if self.mode == 'MAX': w = face_weight.max()
if self.mode == 'MEAN': w = face_weight.mean()
faces_weight.append(w)
faces_weight = np.array(faces_weight)
faces_weight = faces_weight * count
faces_weight.astype('int')
ob.data.polygons.foreach_set('material_index',list(faces_weight))
ob.data.update()
bpy.ops.object.mode_set(mode='OBJECT')
return {'FINISHED'}
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