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bpy_util.py
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bpy_util.py
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import bpy
import bpy_types
class Vec3:
co: tuple[float, float, float] = (0, 0, 0)
def __init__(self, x: float, y: float, z: float):
self.co = (x, y, z)
@property
def x(self):
return self.co[0]
@property
def y(self):
return self.co[1]
@property
def z(self):
return self.co[2]
def __copy__(self):
return Vec3(self.x, self.y, self.z)
def __getitem__(self, key):
return self.co[key]
def __mul__(self, other):
if type(other) in [float, int]:
return Vec3(*[co * other for co in self.co])
if type(other) == Vec3:
return Vec3(
self.x * other.x,
self.y * other.y,
self.z * other.z,
)
raise TypeError("Vec3 only supports multiplication with scalar or Vec3")
def __add__(self, other):
return Vec3(
self.x + other.x,
self.y + other.y,
self.z + other.z,
)
def __sub__(self, other):
return Vec3(
self.x - other.x,
self.y - other.y,
self.z - other.z,
)
def __iter__(self):
return self.co.__iter__()
def __str__(self):
return "Vec3(%s,%s,%s)" % self.co
def __repr__(self):
return str(self)
def ints(self) -> tuple[int, int, int]:
return int(self.x), int(self.y), int(self.z)
# returns a new Vec3 with diff added to x, y, or z (indexed by coord_comp)
def add_comp(self, coord_comp, diff):
new_co = list(self.co)
new_co[coord_comp] += diff
return Vec3(*new_co)
# ret false if any component is outside the range of a/b
def in_range(self, a, b):
for co_comp in self.co:
if co_comp < a or co_comp >= b:
return False
return True
def set_comp(self, axis, v):
new_co = list(self.co)
new_co[axis] = v
return Vec3(*new_co)
def _copy_object_shallow(ob, parent, collection=bpy.context.scene.collection, suffix=".copy"):
# copy ob
copy = ob.copy()
copy.name = ob.name + suffix
copy.data = ob.data.copy()
copy.animation_data_clear()
copy.parent = parent
copy.matrix_parent_inverse = ob.matrix_parent_inverse.copy()
collection.objects.link(copy)
return copy
def copy_object(orig,
collection=bpy.context.scene.collection,
suffix=".copy",
levels=5,
exclude: [str] = None,
root_parent=None):
def recurse(ob, parent, depth):
if depth > levels:
return None
children = [c for c in ob.children]
if not parent:
parent = root_parent
copy = _copy_object_shallow(ob, parent, collection, suffix)
for child in children:
if exclude:
if len([1 for exclusion in exclude if exclusion.lower() in child.name.lower()]) > 0:
continue
recurse(child, copy, depth + 1)
return copy
return recurse(orig, root_parent, 0)
def apply_modifiers(obj: bpy.types.Object):
objs = [obj]
while len(objs) > 0:
obj = objs.pop()
for c in obj.children:
objs.append(c)
ctx = bpy.context.copy()
ctx['object'] = obj
for m in obj.modifiers:
try:
bpy.ops.object.modifier_apply(ctx, modifier=m.name)
except RuntimeError:
print(f"Error applying {m.name} to {obj.name}, removing it instead.")
obj.modifiers.remove(m)
for m in obj.modifiers:
obj.modifiers.remove(m)
def save_debug_snapshot(suffix=""):
import pathlib
current_path = bpy.data.filepath
if not current_path:
print("cant debug from unsaved source")
return
current_path = pathlib.Path(current_path).absolute().parent
debug_path = current_path / f"debug{suffix}.blend"
bpy.ops.wm.save_as_mainfile(filepath=str(debug_path))
print(f"SNAPSHOT: {debug_path}")
def extract_children(parent: bpy.types.Object, child_filter=None):
check = [c for c in parent.children]
matches = []
while len(check) > 0:
child = check.pop()
if not child_filter or child_filter(child):
matches.append(child)
for nested in child.children:
check.append(nested)
return matches
def delete_collection(existing: bpy.types.Collection):
bpy.ops.object.select_all(action='DESELECT')
for obj in existing.objects:
obj.select_set(True)
bpy.ops.object.delete()
bpy.data.collections.remove(existing)
def delete_object(existing: bpy.types.Object):
bpy.ops.object.select_all(action='DESELECT')
existing.select_set(True)
bpy.ops.object.delete()
def get_or_create_collection(
name: str,
parent: bpy.types.Collection = None,
replace=False):
if not parent:
parent = bpy.context.collection
existing = parent.children.get(name)
if existing:
if replace:
delete_collection(existing)
else:
return existing
bpy.data.collections.new(name)
collection = bpy.data.collections.get(name)
parent.children.link(collection)
return collection
def create_mesh(
name: str,
location: (float, float, float),
verts: list[Vec3],
edges: list[int],
faces,
):
view_layer = bpy.context.view_layer
mesh_data = bpy.data.meshes.new(name.lower())
mesh_data.from_pydata([v.co for v in verts], edges, faces)
mesh_data.update()
# Create new object with our light datablock.
mesh_obj = bpy.data.objects.new(name=name, object_data=mesh_data)
# Link light object to the active collection of current view layer,
# so that it'll appear in the current scene.
view_layer.active_layer_collection.collection.objects.link(mesh_obj)
# Place light to a specified location.
mesh_obj.location = location
# And finally select it and make it active.
mesh_obj.select_set(True)
view_layer.objects.active = mesh_obj
def apply_transforms(ob, location=False, rotation=False, scale=False):
if ob.data.users <= 1:
bpy.ops.object.select_all(action="DESELECT")
ob.select_set(True)
bpy.ops.object.transform_apply(
location=location, rotation=rotation, scale=scale, properties=False
)
else:
if ob.scale[0] != ob.scale[1] or ob.scale[0] != ob.scale[2]:
print(f"Warning: non-uniform scale on multi-user object {ob.name}.")
if ob.rotation_euler[0] != ob.rotation_euler[1] or ob.rotation_euler[0] != ob.rotation_euler[2]:
print(f"Warning: non-uniform scale on multi-user object {ob.name}.")
def flip_normals(ob):
for obob in _flatten_children(ob):
obob.data.flip_normals()
def _flatten_children(o):
out = []
work = [o]
while len(work) > 0:
c = work.pop()
out.append(c)
work += [ch for ch in c.children]
return out