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createmesh .py
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createmesh .py
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# ##### BEGIN GPL LICENSE BLOCK #####
#
# CreateMesh, a Blender addon
# (c) 2016-2019 Michel J. Anders (varkenvarken)
#
# 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 #####
bl_info = {
"name": "CreateMesh",
"author": "Michel Anders (varkenvarken)",
"version": (0, 0, 201909011720),
"blender": (2, 80, 0),
"location": "View3D > Object > Add Mesh > DumpedMesh",
"description": "Adds a mesh object to the scene that was created with the DumpMesh addon",
"warning": "",
"wiki_url": "https://github.com/varkenvarken/blenderaddons/blob/master/createmesh%20.py",
"tracker_url": "",
"category": "Add Mesh"}
import bpy
import bmesh
class DumpMesh:
# most elements in an attribute layer can be assigned to directly
# if they are floats and if they are Vectors (or Colors) they can
# be assigned a tuple without problems. However, some specific types
# need the value to be assigned to a specific attribute and for
# those we have a mapping here. BMTexPoly does not behave and is not
# documented well (Blender 2.76) so we ignore it.
attributemapping = dict(BMLoopUV=lambda ob,v: setattr(ob,'uv',v),
BMVertSkin=lambda ob,v: setattr(ob,'radius',v),
BMTexPoly=lambda ob,v: None)
def valmap(self, sample):
name = sample.__class__.__name__
if name in self.attributemapping:
return self.attributemapping[name]
return None
def geometry(self):
bm = bmesh.new()
verts = self.__class__.verts
edges = self.__class__.edges
faces = self.__class__.faces
for n,v in enumerate(verts):
bm.verts.new(v)
bm.verts.ensure_lookup_table() # ensures bm.verts can be indexed
bm.verts.index_update() # ensures all bm.verts have an index (= different thing!)
if hasattr(self.__class__,'vert_attributes'):
for attr, values in self.__class__.vert_attributes.items():
for v,val in zip(bm.verts, values):
setattr(v,attr,val)
for n,e in enumerate(edges):
edge = bm.edges.new(bm.verts[v] for v in e)
bm.edges.ensure_lookup_table()
bm.edges.index_update()
if hasattr(self.__class__,'edge_attributes'):
for attr, values in self.__class__.edge_attributes.items():
for e,val in zip(bm.edges, values):
setattr(e,attr,val)
for n,f in enumerate(faces):
bm.faces.new(bm.verts[v] for v in f)
bm.faces.ensure_lookup_table()
bm.faces.index_update()
if hasattr(self.__class__,'face_attributes'):
for attr, values in self.__class__.face_attributes.items():
for f,val in zip(bm.faces, values):
setattr(f,attr,val)
for etype in ('verts', 'edges', 'faces'):
seq = getattr(bm, etype)
bmlayers = seq.layers
if hasattr(self.__class__, etype + '_layers'):
for layertype, layers in getattr(self.__class__, etype + '_layers').items():
bmlayertype = getattr(bmlayers, layertype)
for layername, values in layers.items():
bmlayer = bmlayertype.new(layername) # fresh object so we don't check if the layer already exists
valmap = self.valmap(seq[0][bmlayer])
for n, ele in enumerate(seq):
if valmap is None:
ele[bmlayer] = values[n]
else:
valmap(ele[bmlayer],values[n])
bmlayers = bm.loops.layers
if hasattr(self.__class__, 'loops_layers'):
for layertype, layers in getattr(self.__class__, 'loops_layers').items():
bmlayertype = getattr(bmlayers, layertype)
attrname = self.__class__.attributemapping[layertype] if layertype in self.__class__.attributemapping else None
for layername, values in layers.items():
bmlayer = bmlayertype.new(layername) # fresh object so we don't check if the layer already exists
# we assume all loops will be numbered in ascending order
# bm.faces[i].loops.index_update() is of no use, since it
# start numbering again at 0 for this set of loops, so there
# is no way to update the indices of all loop in in go,
# except by converting the bm to a regular mesh, in which
# case it happens automagically.
loopindex = 0
for face in bm.faces:
for loop in face.loops:
val = values[face.index][loopindex]
valmap = self.valmap(loop[bmlayer])
if valmap is None:
loop[bmlayer] = val
else:
valmap(loop[bmlayer],val)
loopindex += 1
return bm
# bmesh.types.BMesh cannot be subclassed, but this way we can almost
# let DumpMesh derived classes behave like a class factory whose
# instances return a BMesh
def __call__(self):
return self.geometry()
class Cube(DumpMesh):
verts = [(-1,-1,-1),(-1,-1,1),(-1,1,-1),(-1,1,1),(1,-1,-1),(1,-1,1),(1,1,-1),(1,1,1),]
edges = [(0, 1),(1, 3),(3, 2),(2, 0),(3, 7),(7, 6),(6, 2),(7, 5),(5, 4),(4, 6),(5, 1),(0, 4),]
faces = [(1, 3, 2, 0),(3, 7, 6, 2),(7, 5, 4, 6),(5, 1, 0, 4),(0, 2, 6, 4),(5, 7, 3, 1),]
verts_layers = {'bevel_weight': {}, 'deform': {}, 'float': {}, 'int': {}, 'paint_mask': {}, 'shape': {}, 'skin': {'': {0:(0.25, 0.25),1:(0.25, 0.25),2:(0.25, 0.25),3:(0.25, 0.25),4:(0.25, 0.25),5:(0.25, 0.25),6:(0.25, 0.25),7:(0.25, 0.25),}, }, 'string': {}, }
edges_layers = {'bevel_weight': {}, 'crease': {'SubSurfCrease': {0:0.0,1:0.0,2:0.0,3:0.0,4:0.0,5:1.0,6:0.0,7:1.0,8:1.0,9:1.0,10:0.0,11:0.0,}, }, 'float': {}, 'freestyle': {}, 'int': {}, 'string': {}, }
faces_layers = {'float': {}, 'freestyle': {}, 'int': {}, 'string': {}, 'tex': {'UVMap': {0:None,1:None,2:None,3:None,4:None,5:None,}, }, }
loops_layers = {'color': {'Col': {0: {0:(1.0, 1.0, 1.0),1:(1.0, 1.0, 1.0),2:(1.0, 1.0, 1.0),3:(1.0, 1.0, 1.0),},1: {4:(1.0, 1.0, 1.0),5:(1.0, 1.0, 1.0),6:(1.0, 1.0, 1.0),7:(1.0, 1.0, 1.0),},2: {8:(1.0, 1.0, 1.0),9:(1.0, 1.0, 1.0),10:(1.0, 1.0, 1.0),11:(1.0, 1.0, 1.0),},3: {12:(1.0, 0.15294118225574493, 0.14901961386203766),13:(1.0, 0.007843137718737125, 0.0),14:(1.0, 0.007843137718737125, 0.0),15:(1.0, 0.007843137718737125, 0.0),},4: {16:(1.0, 1.0, 1.0),17:(1.0, 1.0, 1.0),18:(1.0, 1.0, 1.0),19:(1.0, 1.0, 1.0),},5: {20:(1.0, 1.0, 1.0),21:(1.0, 1.0, 1.0),22:(1.0, 1.0, 1.0),23:(1.0, 1.0, 1.0),},},},'float': {},'int': {},'string': {},'uv': {'UVMap': {0: {0:(0.33333346247673035, 0.6666666269302368),1:(0.33333340287208557, 0.3333333730697632),2:(0.6666666865348816, 0.3333333432674408),3:(0.6666667461395264, 0.6666666269302368),},1: {4:(3.973642037635727e-08, 0.6666666865348816),5:(0.0, 0.33333340287208557),6:(0.333333283662796, 0.3333333432674408),7:(0.3333333432674408, 0.6666666269302368),},2: {8:(1.291433733285885e-07, 0.3333333432674408),9:(0.0, 8.940693874137651e-08),10:(0.3333333134651184, 0.0),11:(0.33333340287208557, 0.33333325386047363),},3: {12:(0.33333340287208557, 3.9736416823643594e-08),13:(0.6666666865348816, 0.0),14:(0.6666667461395264, 0.33333325386047363),15:(0.33333346247673035, 0.3333333134651184),},4: {16:(1.0, 0.0),17:(1.0, 0.33333322405815125),18:(0.6666667461395264, 0.33333322405815125),19:(0.6666667461395264, 2.9802313505911115e-08),},5: {20:(0.0, 0.6666667461395264),21:(0.33333325386047363, 0.6666666865348816),22:(0.333333283662796, 0.9999999403953552),23:(4.967052547044659e-08, 0.9999999403953552),},},}, }
vert_attributes = {
'normal' : [(-0.5773491859436035, -0.5773491859436035, -0.5773491859436035), (-0.5773491859436035, -0.5773491859436035, 0.5773491859436035), (-0.5773491859436035, 0.5773491859436035, -0.5773491859436035), (-0.5773491859436035, 0.5773491859436035, 0.5773491859436035), (0.5773491859436035, -0.5773491859436035, -0.5773491859436035), (0.5773491859436035, -0.5773491859436035, 0.5773491859436035), (0.5773491859436035, 0.5773491859436035, -0.5773491859436035), (0.5773491859436035, 0.5773491859436035, 0.5773491859436035)],
'select' : [False, True, False, True, False, True, False, True],
}
edge_attributes = {
'seam' : [False, False, False, False, False, False, False, False, False, False, False, False],
'smooth' : [True, True, True, True, True, True, True, True, True, True, True, True],
'select' : [False, True, False, False, True, False, False, True, False, False, True, False],
}
face_attributes = {
'normal' : [(-1.0, 0.0, 0.0), (0.0, 1.0, -0.0), (1.0, 0.0, -0.0), (0.0, -1.0, 0.0), (-0.0, 0.0, -1.0), (-0.0, 0.0, 1.0)],
'smooth' : [False, False, False, False, False, False],
'select' : [False, False, False, False, False, True],
}
meshes = [ Cube ]
from bpy_extras.object_utils import object_data_add
class CreateMesh(bpy.types.Operator):
"""Add mesh objects to the scene"""
bl_idname = "mesh.createmesh"
bl_label = "CreateMesh"
bl_options = {'REGISTER', 'UNDO'}
@classmethod
def poll(cls, context):
return context.mode == 'OBJECT'
def execute(self, context):
for mesh in meshes:
meshfactory = mesh()
me = bpy.data.meshes.new(name=meshfactory.__class__.__name__)
ob = object_data_add(context, me)
bm = meshfactory()
# write the bmesh to the mesh
bm.to_mesh(me)
me.update()
bm.free()
# associate the mesh with the object
ob.data = me
context.view_layer.objects.active = ob
ob.select_set(True)
return {'FINISHED'}
def register():
bpy.utils.register_class(CreateMesh)
bpy.types.VIEW3D_MT_add.append(menu_func)
def unregister():
bpy.utils.unregister_module(CreateMesh)
bpy.types.VIEW3D_MT_add.remove(menu_func)
def menu_func(self, context):
self.layout.operator(CreateMesh.bl_idname, icon='PLUGIN')
if __name__ == "__main__":
register()