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# mesh_select_by_pi.py Copyright (C) 2011, Dolf Veenvliet
# Extrude a selection from a mesh multiple times
# ***** 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 LICENCE BLOCK *****
'''
bl_info = {
"name": "Select by pi",
"author": "Dolf Veenvliet",
"version": 1,
"blender": (2, 56, 0),
"location": "View3D > Select",
"description": "Select fake random based on pi",
"warning": "",
"wiki_url": "",
"tracker_url": "",
"category": "Mesh"}
"""
Usage:
Additional links:
Author Site: http://www.macouno.com
e-mail: dolf {at} macouno {dot} com
"""
'''
import bpy
from bpy.types import Operator
from bpy.props import BoolProperty
class Select_by_pi():
# Initialise the class
def __init__(self, context, e, invert, extend, start_new):
self.ob = context.active_object
# keep or not the original selection (helps with selected all)
if start_new:
bpy.ops.mesh.select_all(action='DESELECT')
bpy.ops.object.mode_set(mode='OBJECT')
self.invert = invert
# Make pi as a list of integers
if e:
self.pi = list('27182818284590452353602874713526624977572470936999')
else:
self.pi = list('31415926535897932384626433832795028841971693993751')
self.piLen = len(self.pi)
self.piPos = 0
vertSelect = bpy.context.tool_settings.mesh_select_mode[0]
edgeSelect = bpy.context.tool_settings.mesh_select_mode[1]
faceSelect = bpy.context.tool_settings.mesh_select_mode[2]
# Vert select
if vertSelect:
hasSelected = self.hasSelected(self.ob.data.vertices)
for v in self.ob.data.vertices:
s = self.selectCheck(v.select, hasSelected, extend)
d = self.deselectCheck(v.select, hasSelected, extend)
# Check if the verts match any of the directions
if s and self.choose():
v.select = True
if d and not self.choose():
v.select = False
# Edge select
if edgeSelect:
hasSelected = self.hasSelected(self.ob.data.edges)
for e in self.ob.data.edges:
s = self.selectCheck(e.select, hasSelected, extend)
d = self.deselectCheck(e.select, hasSelected, extend)
if s and self.choose():
e.select = True
if d and not self.choose():
e.select = False
# Face select
if faceSelect:
hasSelected = self.hasSelected(self.ob.data.polygons)
# Loop through all the given faces
for f in self.ob.data.polygons:
s = self.selectCheck(f.select, hasSelected, extend)
d = self.deselectCheck(f.select, hasSelected, extend)
# Check if the faces match any of the directions
if s and self.choose():
f.select = True
if d and not self.choose():
f.select = False
bpy.ops.object.mode_set(mode='EDIT')
# Choose by pi
def choose(self):
choice = True
# We just choose the odd numbers
if int(self.pi[self.piPos]) % 2:
choice = False
if self.invert:
choice = not choice
self.incrementPiPos()
return choice
# Increment the pi position
def incrementPiPos(self):
self.piPos += 1
if self.piPos == self.piLen:
self.piPos = 0
# See if the current item should be selected or not
def selectCheck(self, isSelected, hasSelected, extend):
# If the current item is not selected we may want to select
if not isSelected:
# If we are extending or nothing is selected we want to select
if extend or not hasSelected:
return True
return False
# See if the current item should be deselected or not
def deselectCheck(self, isSelected, hasSelected, extend):
# If the current item is selected we may want to deselect
if isSelected:
# If something is selected and we're not extending we want to deselect
if hasSelected and not extend:
return True
return False
# See if there is at least one selected item
def hasSelected(self, items):
for item in items:
if item.select:
return True
return False
class Select_init(Operator):
bl_idname = "mesh.select_by_pi"
bl_label = "Select by Pi or e"
bl_description = ("Select Vertices/Edges/Faces based on pi or e for a random-like selection\n"
"Number Pi (3.14 etc.) or e (2.71828 - Euler's number)")
bl_options = {'REGISTER', 'UNDO'}
e = BoolProperty(
name="Use e",
description="Use e as the base of selection instead of pi",
default=False
)
invert = BoolProperty(
name="Invert",
description="Invert the selection result",
default=False
)
extend = BoolProperty(
name="Extend",
description="Extend the current selection",
default=False
)
start_new = BoolProperty(
name="Fresh Start",
default=False,
description="Start from no previous selection"
)
@classmethod
def poll(cls, context):
obj = context.active_object
return (obj and obj.type == 'MESH')
def execute(self, context):
Select_by_pi(context, self.e, self.invert, self.extend, self.start_new)
return {'FINISHED'}
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