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carvers.py
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carvers.py
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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 #####
# <pep8 compliant>
"""The NeuroBlender carvers module.
NeuroBlender is a Blender add-on to create artwork from neuroscientific data.
This module implements carvers that slice through NeuroBlender objects.
"""
from mathutils import Vector
import bpy
import numpy as np
from bpy.types import (Operator,
UIList,
Menu)
from bpy.types import PropertyGroup as pg
from bpy.props import (StringProperty,
EnumProperty)
from . import (materials as nb_ma,
utils as nb_ut)
class NB_OT_import_carvers(Operator):
bl_idname = "nb.import_carvers"
bl_label = "New carver"
bl_description = "Create a new carver"
bl_options = {"REGISTER", "UNDO", "PRESET"}
name = StringProperty(
name="Name",
description="Specify a name for the carver",
default="Carver")
parentpath = StringProperty(
name="Parentpath",
description="The path to the parent of the object",
default="nb")
def execute(self, context):
scn = context.scene
nb = scn.nb
# get parent info and object
nb_ob = scn.path_resolve(self.parentpath)
obinfo = nb_ut.get_nb_objectinfo(nb_ob.name)
ob = bpy.data.objects.get(nb_ob.name)
# check name
nb_colls = [nb.surfaces, nb.voxelvolumes]
ca = [nb_ob.carvers
for nb_coll in nb_colls
for nb_ob in nb_coll]
ca += [bpy.data.groups, bpy.data.objects, bpy.data.meshes]
name = '{}.{}'.format(nb_ob.name, self.name)
name = nb_ut.check_name(name, "", ca)
# add the carver to carver collection
props = {"name": name}
carver = nb_ut.add_item(nb_ob, "carvers", props)
nb_ob.carvers_enum = carver.name
# create the carver
self.create_carvebox(context, carver.name, ob, nb_ob, obinfo['layer'])
# hide the parent object
nb_ob.is_rendered = False
ob.hide = ob.hide_render = True
infostring = 'added carver "%s" to object "%s"'
info = [infostring % (name, nb_ob.name)]
self.report({'INFO'}, '; '.join(info))
return {"FINISHED"}
def invoke(self, context, event):
nb_ob = nb_ut.active_nb_object()[0]
self.parentpath = nb_ob.path_from_id()
return self.execute(context)
def create_carvebox(self, context, name, ob, nb_ob, layer=2):
"""Create a box to gather carve objects in."""
scn = context.scene
# add carvebox
bpy.ops.mesh.primitive_cube_add()
box = scn.objects.active
box.name = box.data.name = name
# scale and move to overlap with object
loc_ctr = 0.125 * sum((Vector(b) for b in ob.bound_box), Vector())
glob_ctr = ob.matrix_world * loc_ctr
pts = [v.co for v in ob.data.vertices]
datamin = np.amin(np.array(pts), axis=0)
datamax = np.amax(np.array(pts), axis=0)
dims = datamax - datamin
box.scale = np.absolute(ob.scale) * dims / 2 # box is 2x2x2
box.location = glob_ctr
# attach texture mapping (vvol) or boolean (surf)
try:
pg_sc = bpy.types.SurfaceProperties
except AttributeError:
pg_sc = pg.bl_rna_get_subclass_py("SurfaceProperties")
if isinstance(nb_ob, pg_sc):
self.add_boolmod(ob.name, box, ob, 'BMESH', 'INTERSECT')
# ms = ob.material_slots.get(ob.name)
for ms in ob.material_slots:
mat = ms.material
box.data.materials.append(mat)
# prevent the user from controlling the carver from the viewport
box.hide_select = True
for i, _ in enumerate('xyz'):
box.lock_location[i] = True
box.lock_rotation[i] = True
box.lock_scale[i] = True
# let the carvebox follow the parent object
cns = box.constraints.new(type='CHILD_OF')
cns.target = ob
cns.inverse_matrix = ob.matrix_world.inverted()
# add to group and move to layer
group = bpy.data.groups.new(name)
group.objects.link(box)
nb_ut.move_to_layer(box, layer)
bpy.context.scene.objects.active = box
nb_ut.force_object_update(context, box)
return box
def mappingbounds(self, context, ob, box, dims=[256, 256, 256],
mat=None, layer=5):
"""Create an array of cubes at the voxelvolume's corners."""
name = "{}.bounds".format(box.name)
scale = [1./dim for dim in dims]
location = [-1 + sc for sc in scale]
bpy.ops.mesh.primitive_cube_add(location=location)
bounds = context.scene.objects.active
bounds.name = bounds.data.name = name
bounds.scale = scale
bounds.parent = box
if isinstance(mat, bpy.types.Material):
bounds.data.materials.append(mat)
bounds.hide = bounds.hide_select = bounds.hide_render = True
for i, direc in enumerate('xyz'):
bounds.lock_location[i] = True
bounds.lock_rotation[i] = True
bounds.lock_scale[i] = True
mod = bounds.modifiers.new("array_{}".format(direc), type='ARRAY')
mod.use_relative_offset = True
mod.relative_offset_displace[0] = 0
mod.relative_offset_displace[i] = dims[i] - 1
self.add_boolmod(name, ob, bounds, 'BMESH', 'UNION')
nb_ut.move_to_layer(bounds, layer)
return bounds
@staticmethod
def get_wire_material(name='wire'):
"""Create a wire material.
(BR for now: TODO)
"""
mat = bpy.data.materials.new(name)
mat.type = "WIRE"
mat.diffuse_color = (0.8, 0, 0)
mat.emit = 1
mat.use_transparency = True
mat.alpha = 0.5
# bpy.data.node_groups["Shader Nodetree"].nodes["Material"].inputs[0].default_value = (0.8, 0, 0, 1)
# bpy.context.object.active_material.use_nodes = False
return mat
@staticmethod
def add_boolmod(name, par, ob, solver='BMESH', operation='INTERSECT'):
"""Add a boolean modifier."""
boolmod = par.modifiers.new(name, 'BOOLEAN')
boolmod.solver = solver
boolmod.operation = operation
boolmod.object = ob
return boolmod
# class OBJECT_MT_colourmap_presets(Menu):
# bl_label = "Colourmap Presets"
# bl_description = "Choose a NeuroBlender Colourmap Preset"
# preset_subdir = "neuroblender_colourmaps"
# preset_operator = "script.execute_preset_cr"
# draw = Menu.draw_preset
class NB_OT_import_carveobjects(Operator):
bl_idname = "nb.import_carveobjects"
bl_label = "New carveobject"
bl_description = "Create a new carveobject"
bl_options = {"REGISTER", "UNDO", "PRESET"}
name = StringProperty(
name="Name",
description="Specify a name for the carveobject",
default="slice")
parentpath = StringProperty(
name="Parentpath",
description="The path to the parent of the object",
default="nb")
carveobject_type_enum = EnumProperty(
name="Type",
description="Type of carve object",
default="slice",
items=[("slice", "Slice", "Slice", 0),
("orthoslices", "Orthogonal slices", "Orthogonal slices", 1),
("cube", "Cube", "Cube", 2),
("cylinder", "Cylinder", "Cylinder", 3),
("sphere", "Sphere", "Sphere", 4),
("suzanne", "Suzanne", "Suzanne", 5),
("activeob", "Active object", "Active object", 6)])
def execute(self, context):
scn = context.scene
carver = scn.path_resolve(self.parentpath)
groupname, names = self.get_names(context, carver)
co_group = bpy.data.groups.get(groupname) or \
bpy.data.groups.new(groupname)
for name in names:
self.create_carveobject(context, name, carver, co_group)
# ob = bpy.data.objects.get(carver.name).parent
ob = bpy.data.objects.get(carver.name)
nb_ut.force_object_update(context, ob)
infostring = 'added carveobject "%s" in carver "%s"'
info = [infostring % (name, carver.name)]
self.report({'INFO'}, '; '.join(info))
return {"FINISHED"}
def invoke(self, context, event):
nb_ob = nb_ut.active_nb_object()[0]
carver = nb_ob.carvers[nb_ob.index_carvers]
self.parentpath = carver.path_from_id()
self.carveobject_type_enum = carver.carveobject_type_enum
self.name = self.carveobject_type_enum
return self.execute(context)
def create_carveobject(self, context, name, carver, slicegroup, layer=5):
"""Create a carve object."""
scn = context.scene
carveobtype = self.carveobject_type_enum
carvergroup = bpy.data.groups.get(carver.name)
carvebox = carvergroup.objects.get(carver.name)
carveob = self.add_carveobject(context)
if carveobtype != "activeob":
carveob.name = carveob.data.name = name
carveob.parent = carvebox
nb_ut.move_to_layer(carveob, layer)
carvergroup.objects.link(carveob)
slicegroup.objects.link(carveob)
props = {"name": name, "type": carveobtype}
if carveobtype == "slice":
props['slicethickness'] = [0.99, 0.99, 0.05]
elif carveobtype == "orthoslices":
props['slicethickness'] = [0.99, 0.99, 0.99]
props['slicethickness']['xyz'.find(name[-1])] = 0.05
elif carveobtype == "cylinder":
props['slicethickness'] = [0.50, 0.50, 1.0]
elif carveobtype in ("cube", "sphere"):
props['slicethickness'] = [0.50, 0.50, 0.50]
elif carveobtype == "activeob":
props['slicethickness'] = carveob.scale
props['sliceposition'] = carveob.location
props['sliceangle'] = carveob.rotation_euler
co = nb_ut.add_item(carver, "carveobjects", props)
co.slicethickness = co.slicethickness
mat = bpy.data.materials.get('wire')
nb_ma.set_materials(carveob.data, mat)
carveob.hide = carveob.hide_select = False
carveob.hide_render = True
op = 'UNION' if carver.index_carveobjects else 'INTERSECT'
self.add_boolmod(name, carvebox, carveob, operation=op)
# scn.objects.active = carvebox
# cmods = carvebox.modifiers
# while cmods.find('wire') in range(0, len(cmods) - 1):
# bpy.ops.object.modifier_move_down(modifier="wire")
scn.objects.active = carvebox.parent
return carveob
def add_carveobject(self, context):
carveobtype = self.carveobject_type_enum
if carveobtype in ("slice", "orthoslices", "cube"):
bpy.ops.mesh.primitive_cube_add()
elif carveobtype == "cylinder":
bpy.ops.mesh.primitive_cylinder_add(vertices=64)
elif carveobtype == "sphere":
bpy.ops.mesh.primitive_ico_sphere_add(subdivisions=5)
elif carveobtype == "suzanne":
bpy.ops.mesh.primitive_monkey_add(calc_uvs=True)
elif carveobtype == "activeob":
pass
else:
return
return context.scene.objects.active
def get_names(self, context, carver):
scn = context.scene
nb = scn.nb
cotype = self.carveobject_type_enum
gdict = {"orthoslices": "orthoslices",
"activeob": "non-normalized",
"slice": "normalized",
"cube": "normalized",
"cylinder": "normalized",
"sphere": "normalized",
"suzanne": "normalized"}
gname = '{}.{}'.format(carver.name, gdict[cotype])
# FIXME: check against all modifier names (e.g. 'wire' is reserved)
nb_colls = [nb.surfaces, nb.voxelvolumes]
item_ca = [carver.carveobjects
for nb_coll in nb_colls
for nb_ob in nb_coll
for carver in nb_ob.carvers]
group_ca = [bpy.data.groups] if cotype == 'orthoslices' else []
ca = [group_ca, item_ca]
funs = [self.fun_groupname, self.fun_itemnames]
name = '{}.{}'.format(carver.name, self.name)
gnames, names = nb_ut.compare_names(name, ca, funs,
{'groupname': gname})
return gnames[0], names
def fun_groupname(self, name, argdict):
"""Generate overlay group names."""
names = [argdict['groupname']]
return names
def fun_itemnames(self, name, argdict):
"""Generate names."""
carveobtype = self.carveobject_type_enum
if carveobtype == "orthoslices":
names = ['{}.{}'.format(name, direc) for direc in 'xyz']
elif carveobtype == "activeob":
names = [bpy.context.scene.objects.active.name]
else:
names = [name]
return names
@staticmethod
def add_boolmod(name, par, ob, solver='BMESH', operation='INTERSECT'):
"""Add a boolean modifier."""
boolmod = par.modifiers.new(name, 'BOOLEAN')
boolmod.solver = solver
boolmod.operation = operation
boolmod.object = ob
return boolmod