I am currently working with a script that was originally written for Blender 2.49, the last part of the code is meant to copy a group of objects multiple times in a pre-arranged way
I have upgraded it into 3.0, but I am still stuck on two parts, getting the mesh data, and duplicating the objects.
I think i fixed the first part.
if obj in scndict:
oolist.append(scndict[obj].getData(mesh=1))
found = 1
I replaced oolist.append(scndict[obj].getData(mesh=1))with oolist.append(scndict[obj].data) to get the mesh data.
I tried to pass it but the objects.link only takes objects so I replaced it with oolist.append(scndict[obj])
I then tried to pass it to new_o = scn.objects.new(o) but it got an attribute error, the point of the function is to create new objects, I could not find a replacement in the new Blender API for scene.objects.new()
Therefore, to make due I replacef it with scn.collection.objects.link()
When I run it the code runs but only adds one copy to the master collection and says the object is already linked and shows no new mesh. What I seek is how to pass mesh data into an object and create multiple copies of that object. Any guidance on this would be appreciated.
Full code below
Updated Code :
import bpy
import os
import math
import mathutils
import re
import array
import itertools
from bpy.props import StringProperty, BoolProperty
from bpy_extras.io_utils import ImportHelper
from bpy.types import Operator
from math import radians
from mathutils import Matrix
extents_re = re.compile(r"^x, y, and z extents")
objects_start_re = re.compile(r"<Objects>")
start_name_re = re.compile(r"^(\d+)?\s*(?:\\\$([^\s]*))?")
name_re = re.compile(r"^\s*\\\$([^\s]*)")
end_re = re.compile("^#\s*")
def make_scndict(scn):
scndict = {}
for i in scn.objects:
scndict[i.name] = i
return scndict
def read_grid(infile):
li = infile.readline()
dim = [int(x) for x in li.rstrip().split(' ')]
grid = array.array('L', itertools.repeat(0, dim[0]*dim[1]*dim[2]))
for z in range(0, dim[2]):
li = infile.readline()
for x in range(0, dim[0]):
li = [int(it) for it in infile.readline().rstrip().split()]
for y in range(0, dim[1]):
grid[z*dim[1]*dim[0] + x*dim[1] + y] = li[y]
return (dim, grid)
def read_object(infile, li):
res = start_name_re.match(li)
grps = res.groups()
if(grps[0] != None):
num = int(grps[0])
else:
num = None
entry = []
## Apparently, we don't want to use any objects the appear on
## the same line as the number, so don't use any other groups
## if(grps[1] != None):
## entry.append(grps[1])
li = infile.readline()
res = end_re.match(li)
while res == None:
res = name_re.match(li)
assert(res != None)
entry.append(res.group(1))
li = infile.readline()
res = end_re.match(li)
return (num, entry)
def read_objects(infile):
scenefile = infile.readline()
objs = []
li = infile.readline()
while li != "":
if(li.rstrip() != ""):
num, entry = read_object(infile, li)
print(num, entry)
objs.append(entry)
li = infile.readline()
return (objs,scenefile)
def read_synth(infile):
## Look for start of grid (skip until extent warning)
li = infile.readline()
res = extents_re.match(li)
while li != "" and res == None:
li = infile.readline()
res = extents_re.match(li)
(dim, grid) = read_grid(infile)
print ("Read %d x %d x %d grid" % (dim[0], dim[1], dim[2]))
## Look for start of objects (skip until object tag)
li = infile.readline()
res = objects_start_re.match(li)
while li != "" and res == None:
li = infile.readline()
res = objects_start_re.match(li)
(objs, scenefile) = read_objects(infile)
print("Read %d object groups" % (len(objs),))
return (dim, grid, objs, scenefile)
def fuse_objects(scndict, objs):
res = [None]
found = 0
missing = 0
for olist in objs:
oolist = []
for obj in olist:
if obj in scndict:
oolist.append(scndict[obj].data)
found = 1
else:
missing = 1
res.append(oolist)
return (res, found, missing)
def object_array(scn, dim, grid, objs, units):
for z in range(0, dim[2]):
for x in range(0, dim[0]):
for y in range(0, dim[1]):
current_objs = objs[grid[z*dim[1]*dim[0] + x*dim[1] + y]]
if current_objs == None:
continue
mat = mathutils.Matrix(([1.0, 0.0, 0.0, 0.0],
[0.0, 1.0, 0.0, 0.0],
[0.0, 0.0, 1.0, 0.0],
[x*units, y*units, z*units, 1.0]))
for o in current_objs:
new_o = scn.collection.objects.link(o)
o.matrix_world = mat
print ("Done with plane ", z)
def read_file(filename):
infile = open(filename + ".txt")
scn = bpy.context.window.scene
scndict = make_scndict(bpy.context.window.scene)
(dim, grid, objs, scenefile) = read_synth(infile)
(objs2, found, missing) = fuse_objects(scndict, objs)
scenefile = scenefile.rstrip();
if missing == 1:
print("Blender Scenes/" + scenefile + " is not open.")
fullpath = Blender.sys.expandpath("//" + scenefile)
if Blender.sys.exists(fullpath) == 1:
print("Opening " + scenefile + "...")
Blender.Load(fullpath)
print("a")
scn = bpy.data.scenes.active
print("b")
scndict = make_scndict(bpy.data.scenes.active)
print("c")
(objs2, found, missing) = fuse_objects(scndict, objs)
print("d")
print(found)
if found == 1:
unit = 10
print("Building object array")
object_array(scn, dim, grid, objs2, unit)
print("Done")
else:
print("The objects required in the example model could not be found in the current scene.Open the file Blender Scenes/" + scenefile + " and run the script again.")
if found == 1 and missing == 1:
print("Some of the objects are missing. Check if the file Blender Scenes/" + scenefile + " is open.")
infile.close()
class OT_TestOpenFilebrowser(Operator, ImportHelper):
bl_idname = "test.open_filebrowser"
bl_label = "Select Model"
filter_glob: StringProperty(
default='*.txt',
options={'HIDDEN'}
)
def execute(self,context):
filename, extension = os.path.splitext(self.filepath)
read_file(filename)
return {'FINISHED'}
def register():
bpy.utils.register_class(OT_TestOpenFilebrowser)
def unregister():
bpy.utils.unregister_class(OT_TestOpenFilebrowser)
if __name__ == '__main__':
register()
bpy.ops.test.open_filebrowser('INVOKE_DEFAULT')
Old Code:
import Blender
import bpy
import math
import re
import array
import itertools
extents_re = re.compile(r"^x, y, and z extents")
objects_start_re = re.compile(r"<Objects>")
start_name_re = re.compile(r"^(\d+)?\s*(?:\\\$([^\s]*))?")
name_re = re.compile(r"^\s*\\\$([^\s]*)")
end_re = re.compile("^#\s*")
def make_scndict(scn):
scndict = {}
for i in scn.objects:
scndict[i.name] = i
return scndict
def read_grid(infile):
li = infile.readline()
dim = [int(x) for x in li.rstrip().split(' ')]
grid = array.array('L', itertools.repeat(0, dim[0]*dim[1]*dim[2]))
for z in xrange(0, dim[2]):
li = infile.readline()
for x in xrange(0, dim[0]):
li = [int(it) for it in infile.readline().rstrip().split()]
for y in xrange(0, dim[1]):
grid[z*dim[1]*dim[0] + x*dim[1] + y] = li[y]
return (dim, grid)
def read_object(infile, li):
res = start_name_re.match(li)
grps = res.groups()
if(grps[0] != None):
num = int(grps[0])
else:
num = None
entry = []
## Apparently, we don't want to use any objects the appear on
## the same line as the number, so don't use any other groups
## if(grps[1] != None):
## entry.append(grps[1])
li = infile.readline()
res = end_re.match(li)
while res == None:
res = name_re.match(li)
assert(res != None)
entry.append(res.group(1))
li = infile.readline()
res = end_re.match(li)
return (num, entry)
def read_objects(infile):
scenefile = infile.readline()
objs = []
li = infile.readline()
while li != "":
if(li.rstrip() != ""):
num, entry = read_object(infile, li)
print (num, entry)
objs.append(entry)
li = infile.readline()
return (objs,scenefile)
def read_synth(infile):
## Look for start of grid (skip until extent warning)
li = infile.readline()
res = extents_re.match(li)
while li != "" and res == None:
li = infile.readline()
res = extents_re.match(li)
(dim, grid) = read_grid(infile)
print ("Read %d x %d x %d grid" % (dim[0], dim[1], dim[2]))
## Look for start of objects (skip until object tag)
li = infile.readline()
res = objects_start_re.match(li)
while li != "" and res == None:
li = infile.readline()
res = objects_start_re.match(li)
(objs, scenefile) = read_objects(infile)
print ("Read %d object groups" % (len(objs),))
return (dim, grid, objs, scenefile)
def fuse_objects(scndict, objs):
res = [None]
found = 0
missing = 0
for olist in objs:
oolist = []
for obj in olist:
if obj in scndict:
oolist.append(scndict[obj].getData(mesh=1))
found = 1
else:
missing = 1
res.append(oolist)
return (res, found, missing)
def object_array(scn, dim, grid, objs, units):
for z in xrange(0, dim[2]):
for x in xrange(0, dim[0]):
for y in xrange(0, dim[1]):
current_objs = objs[grid[z*dim[1]*dim[0] + x*dim[1] + y]]
if current_objs == None:
continue
mat = Blender.Mathutils.Matrix([1.0, 0.0, 0.0, 0.0],
[0.0, 1.0, 0.0, 0.0],
[0.0, 0.0, 1.0, 0.0],
[x*units, y*units, z*units, 1.0])
for o in current_objs:
new_o = scn.objects.new(o)
new_o.setMatrix(mat)
print ("Done with plane ", z)
def read_file(filename):
infile = open(filename)
scn = bpy.data.scenes.active
scndict = make_scndict(bpy.data.scenes.active)
(dim, grid, objs, scenefile) = read_synth(infile)
(objs2, found, missing) = fuse_objects(scndict, objs)
scenefile = scenefile.rstrip();
if missing == 1:
print ("Blender Scenes/" + scenefile + " is not open. ")
fullpath = Blender.sys.expandpath("//" + scenefile)
if Blender.sys.exists(fullpath) == 1:
print ("Opening " + scenefile + "...")
Blender.Load(fullpath)
print ("a")
scn = bpy.data.scenes.active
print ("b")
scndict = make_scndict(bpy.data.scenes.active)
print ("c")
(objs2, found, missing) = fuse_objects(scndict, objs)
print ("d")
print (found)
if found == 1:
unit = 10
print ("Building object array")
object_array(scn, dim, grid, objs2, unit)
print ("Done")
else:
print ("The objects required in the example model could not be found in the current scene. Open the file Blender Scenes/" + scenefile + " and run the script again.")
if found == 1 and missing == 1:
print ("Some of the objects are missing. Check if the file Blender Scenes/" + scenefile + " is open.")
infile.close()
if __name__ == '__main__':
Blender.Window.FileSelector(read_file,"Select Model")
