I'm learning to work with blender and also to program with Python. I found an article teaching how to create a maze, multiplying the faces and edges all through Geometry Nodes and carving the walls using Python as below. And I wanted to export this maze to fbx. But when I do this the conventional way I get only the original walls and pillars (meshes) and everything that was done through the Geometry and script is not exported. I tried to export using a script I found here in this post: Export collection and set FBX file name
But it did not work. Has anyone tried this? Would you help me?
This is the code I'm using (and blender file is attached: maze.blend):
''' select a mesh object and then run this script to turn that object into a maze '''
import bpy, bmesh, random, os
active = bpy.context.active_object
if active.type != 'MESH':
raise Exception("Active object must be a mesh object")
make sure the active object has the maze nodes modifier
maze_nodes = bpy.data.node_groups['Maze']
maze_modifier = None
for modifier in active.modifiers:
if modifier.type == 'NODES' and modifier.node_group == maze_nodes:
maze_modifier = modifier
break
if not maze_modifier:
maze_modifier = active.modifiers.new('Maze', 'NODES')
maze_modifier.node_group = bpy.data.node_groups['Maze']
for i in range(len(active.modifiers) - 1):
bpy.ops.object.modifier_move_up(modifier=maze_modifier.name)
get the active mesh and make sure it has the 'closed' attribute
mesh = active.data
bm = bmesh.new()
bm.from_mesh(mesh)
closed = mesh.attributes.get('closed')
if not closed:
closed = mesh.attributes.new(name='closed', type='BOOLEAN', domain='EDGE')
closed.name = 'closed'
reset the maze by closing all the edges
for e in bm.edges:
setattr(closed.data[e.index], 'value', True)
randomly choose a cell to start carving out the maze from
current_cell = random.choice(list(bm.faces))
current_cell = list(bm.faces)[255]
visited = [current_cell]
stack = [current_cell]
loop until the entire maze has been carved out
while len(stack) > 0:
current_cell = stack.pop()
# get a list of unvisited neighbors to the current cell
unvisited_neighbors = []
for edge in current_cell.edges:
for neighbor in edge.link_faces:
if neighbor != current_cell and neighbor not in visited:
unvisited_neighbors.append(neighbor)
# if there are any unvisited neighbors then randomly choose one to visit
if len(unvisited_neighbors) > 0:
stack.append(current_cell)
chosen_neighbor = random.choice(unvisited_neighbors)
visited.append(chosen_neighbor)
stack.append(chosen_neighbor)
# open all the edges between the current cell and the chosen neighbor
for edge in current_cell.edges:
if edge in chosen_neighbor.edges:
setattr(closed.data[edge.index], 'value', False)
update the mesh so that the maze is visible immediately
setattr(closed.data[0], 'value', False)
setattr(closed.data[2], 'value', False)
mesh.update()
C = bpy.context
bpy.ops.export_scene.fbx(
filepath=bpy.path.abspath("//{}.fbx".format(C.collection.name)),
use_active_collection=True
)
