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Nicolas Predella 2026-07-20 19:04:46 +03:00
parent 2b98e9bc69
commit 0e14fa19f7
1 changed files with 195 additions and 147 deletions
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342
infra/blender/blender_mesh_capture.py
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@ -3,6 +3,7 @@ from bpy.types import Object, Mesh
import bpy import bpy
import zlib, struct import zlib, struct
from functools import cached_property from functools import cached_property
from contextlib import contextmanager, ExitStack
import numpy as np import numpy as np
from numpy import dtype, float64 from numpy import dtype, float64
@ -17,6 +18,74 @@ TYPES_NAME = 'DEFAULT'
class MeshCaptureException(Exception): pass class MeshCaptureException(Exception): pass
@contextmanager
def get_evaluated_mesh(obj: Object):
"""
Context manager yielding (eval_obj, mesh) for a Blender object.
Applies all modifiers even if the object is hidden in viewport or in a hidden/disabled collection,
WITHOUT changing any visibility settings on the original object or its collections.
"""
if obj.mode == 'EDIT':
obj.update_from_editmode()
depsgraph = bpy.context.evaluated_depsgraph_get()
is_hidden = obj.hide_viewport or obj.hide_get()
mesh = None
eval_obj = None
is_temp = False
temp_obj = None
# Try direct evaluation first
try:
eval_obj = obj.evaluated_get(depsgraph)
m = eval_obj.to_mesh(preserve_all_data_layers=True, depsgraph=depsgraph)
if m and len(m.vertices) > 0 and not is_hidden and (not obj.modifiers or len(m.vertices) != len(obj.data.vertices)):
mesh = m
elif m:
eval_obj.to_mesh_clear()
except Exception:
pass
if mesh is None:
# Fallback for hidden object / excluded collection
try:
temp_obj = obj.copy()
temp_obj.hide_viewport = False
bpy.context.scene.collection.objects.link(temp_obj)
depsgraph = bpy.context.evaluated_depsgraph_get()
depsgraph.update()
eval_obj = temp_obj.evaluated_get(depsgraph)
mesh = eval_obj.to_mesh(preserve_all_data_layers=True, depsgraph=depsgraph)
is_temp = True
except Exception:
if temp_obj is not None:
try:
bpy.context.scene.collection.objects.unlink(temp_obj)
bpy.data.objects.remove(temp_obj, do_unlink=True)
except Exception:
pass
mesh = None
eval_obj = None
try:
yield eval_obj, mesh
finally:
if mesh is not None and eval_obj is not None:
try:
eval_obj.to_mesh_clear()
except Exception:
pass
if is_temp and temp_obj is not None:
try:
bpy.context.scene.collection.objects.unlink(temp_obj)
bpy.data.objects.remove(temp_obj, do_unlink=True)
bpy.context.evaluated_depsgraph_get().update()
except Exception:
pass
class SlicingObject(): class SlicingObject():
name: str name: str
parent: str parent: str
@ -34,7 +103,6 @@ class SlicingObject():
self.attributes = {} self.attributes = {}
self.modifiers = [] self.modifiers = []
depsgraph = bpy.context.evaluated_depsgraph_get()
assert bpy.context.scene.unit_settings assert bpy.context.scene.unit_settings
scene_scale: float = bpy.context.scene.unit_settings.scale_length scene_scale: float = bpy.context.scene.unit_settings.scale_length
@ -44,10 +112,7 @@ class SlicingObject():
self.modifiers = [{'param_id': m.field, 'param_value': m.value_str} for m in ns.modifiers] self.modifiers = [{'param_id': m.field, 'param_value': m.value_str} for m in ns.modifiers]
if obj: if obj:
if obj.mode == 'EDIT': self.mesh, self.attributes = objects_to_tris([obj], 1000 * scene_scale)
obj.update_from_editmode()
eval_objects = obj.evaluated_get(depsgraph)
self.mesh, self.attributes = objects_to_tris([eval_objects], 1000 * scene_scale)
else: else:
self.mesh = np.empty((0, 4, 3)) self.mesh = np.empty((0, 4, 3))
self.attributes = {} self.attributes = {}
@ -347,19 +412,17 @@ class SlicingGroup():
def _extract_metadata(self, objs) -> None: def _extract_metadata(self, objs) -> None:
import math import math
depsgraph = bpy.context.evaluated_depsgraph_get() assert bpy.context.scene and bpy.context.scene.unit_settings
scale_tx = 1000. * bpy.context.scene.unit_settings.scale_length #type: ignore scale_tx = 1000. * bpy.context.scene.unit_settings.scale_length #type: ignore
self.wipe_tower_xy = self.center_xy[0:2] self.wipe_tower_xy = self.center_xy[0:2]
for obj in objs: for obj in objs:
if obj.mode == 'EDIT': with get_evaluated_mesh(obj) as (eval_obj, _m):
obj.update_from_editmode() if eval_obj and hasattr(eval_obj, 'nodeslicer'):
eval_obj = obj.evaluated_get(depsgraph) if eval_obj.nodeslicer.object_type == 'WipeTower':
if hasattr(eval_obj, 'nodeslicer'): self.wipe_tower_xy = np.array(eval_obj.location[0:2]) * scale_tx
if eval_obj.nodeslicer.object_type == 'WipeTower': self.wipe_tower_rotation_deg = round(eval_obj.rotation_euler[2]*180/math.pi,5)
self.wipe_tower_xy = np.array(eval_obj.location[0:2]) * scale_tx break
self.wipe_tower_rotation_deg = round(eval_obj.rotation_euler[2]*180/math.pi,5)
break
return return
@ -434,139 +497,135 @@ class TriMesh():
self.matrix_world = m self.matrix_world = m
def _cached_objects_to_tris(obj_names: tuple[str, ...], matrices: tuple[tuple[float, ...], ...], scale: float) -> tuple[NDArray[float64], dict[str, dict]]: def _cached_objects_to_tris(obj_names: tuple[str, ...], matrices: tuple[tuple[float, ...], ...], scale: float) -> tuple[NDArray[float64], dict[str, dict]]:
# Implementation remains largely the same but uses names to fetch objects
tris_count: int = 0 tris_count: int = 0
meshes: list[TriMesh] = [] meshes: list[TriMesh] = []
for name in obj_names: with ExitStack() as stack:
obj = bpy.data.objects.get(name) for name in obj_names:
if not obj: continue obj = bpy.data.objects.get(name)
if not obj: continue
try:
depsgraph = bpy.context.evaluated_depsgraph_get() eval_obj, mesh = stack.enter_context(get_evaluated_mesh(obj))
# We must use the evaluated object to get modifiers if not mesh: continue
obj_eval = obj.evaluated_get(depsgraph) mesh.calc_loop_triangles()
mesh: Mesh = obj_eval.to_mesh(preserve_all_data_layers=True, depsgraph=depsgraph)
except: continue
mesh.calc_loop_triangles()
cur_length = len(mesh.loop_triangles) cur_length = len(mesh.loop_triangles)
if cur_length == 0: continue if cur_length == 0: continue
tris_count += cur_length tris_count += cur_length
meshes += [TriMesh( meshes += [TriMesh(
mesh, mesh,
len(mesh.vertices), len(mesh.vertices),
len(mesh.loop_triangles), len(mesh.loop_triangles),
np.array(obj.matrix_world.transposed()) np.array(obj.matrix_world.transposed())
)] )]
tris_flat: np.ndarray = np.empty(tris_count * 4 * 3, dtype=np.float64) tris_flat: np.ndarray = np.empty(tris_count * 4 * 3, dtype=np.float64)
tris: np.ndarray = tris_flat.reshape(-1, 4, 3) tris: np.ndarray = tris_flat.reshape(-1, 4, 3)
# Identify all FACE domain attributes # Identify all FACE domain attributes
face_attributes_info = {} face_attributes_info = {}
for trimesh in meshes: for trimesh in meshes:
for attr in trimesh.mesh.attributes: for attr in trimesh.mesh.attributes:
if attr.domain == 'FACE': if attr.domain == 'FACE':
face_attributes_info[attr.name] = attr.data_type face_attributes_info[attr.name] = attr.data_type
blender_type_map = { blender_type_map = {
'BOOLEAN': 'bool', 'BOOLEAN': 'bool',
'INT': 'int', 'INT': 'int',
'FLOAT': 'float', 'FLOAT': 'float',
'FLOAT_VECTOR': 'float_vector', 'FLOAT_VECTOR': 'float_vector',
'FLOAT_COLOR': 'color', 'FLOAT_COLOR': 'color',
'BYTE_COLOR': 'color', 'BYTE_COLOR': 'color',
}
attributes_data = {}
for name, data_type in face_attributes_info.items():
if data_type not in blender_type_map: continue
my_type = blender_type_map[data_type]
if data_type == 'BOOLEAN':
dtype, shape_ext = np.bool_, ()
elif data_type == 'INT':
dtype, shape_ext = np.int32, ()
elif data_type == 'FLOAT':
dtype, shape_ext = np.float32, ()
elif data_type == 'FLOAT_VECTOR':
dtype, shape_ext = np.float32, (3,)
elif data_type in ('BYTE_COLOR', 'FLOAT_COLOR'):
dtype, shape_ext = np.float32, (4,)
else: continue
attributes_data[name] = {
"domain": "face",
"type": my_type,
"values": np.zeros((tris_count,) + shape_ext, dtype=dtype)
} }
col_idx = 0 attributes_data = {}
for trimesh in meshes: for name, data_type in face_attributes_info.items():
tris_v_i_flat: np.ndarray = np.empty(trimesh.length_tris * 3, dtype=np.int32) if data_type not in blender_type_map: continue
tris_v_n_flat: np.ndarray = np.empty(trimesh.length_tris * 3, dtype=np.float64)
tris_verts_flat: np.ndarray = np.empty(trimesh.length_verts * 3, dtype=np.float64)
trimesh.mesh.loop_triangles.foreach_get("vertices", tris_v_i_flat)
trimesh.mesh.loop_triangles.foreach_get("normal", tris_v_n_flat)
trimesh.mesh.vertices.foreach_get("co", tris_verts_flat)
tris_v_i: np.ndarray = tris_v_i_flat.reshape((-1, 3))
tris_v_n: np.ndarray = tris_v_n_flat.reshape((-1, 3))
tris_verts: np.ndarray = tris_verts_flat.reshape((-1, 3))
homogeneous_verts: NDArray[float64] = np.hstack((tris_verts, np.ones((tris_verts.shape[0], 1)))) # type: ignore
tx_verts = homogeneous_verts @ trimesh.matrix_world
tx_verts = (tx_verts[:, :3]) * scale
homogeneous_norm: NDArray[float64] = np.hstack((tris_v_n, np.ones((tris_v_n.shape[0], 1)))) # type: ignore
tx_norm = homogeneous_norm @ trimesh.matrix_world.T
tx_norm = tx_norm[:, :3]
tx_norm = tx_norm / np.linalg.norm(tx_norm, axis=1, keepdims=True)
tx_norm = tx_norm[:, np.newaxis, :]
tx_tris = tx_verts[tris_v_i]
tris_coords_and_norm: NDArray[float64] = np.concatenate((tx_tris, tx_norm), axis=1)
tris[col_idx:col_idx + trimesh.length_tris,:] = tris_coords_and_norm
# Attributes
if attributes_data:
poly_indices = np.empty(trimesh.length_tris, dtype=np.int32)
trimesh.mesh.loop_triangles.foreach_get("polygon_index", poly_indices)
for name, attr_dict in attributes_data.items(): my_type = blender_type_map[data_type]
if name in trimesh.mesh.attributes:
attr = trimesh.mesh.attributes[name] if data_type == 'BOOLEAN':
data_len = len(attr.data) dtype, shape_ext = np.bool_, ()
elif data_type == 'INT':
if attr.data_type == 'FLOAT_VECTOR': dtype, shape_ext = np.int32, ()
raw_values = np.empty(data_len * 3, dtype=np.float32) elif data_type == 'FLOAT':
attr.data.foreach_get("vector", raw_values) dtype, shape_ext = np.float32, ()
raw_values = raw_values.reshape(-1, 3) elif data_type == 'FLOAT_VECTOR':
elif attr.data_type == 'FLOAT_COLOR': dtype, shape_ext = np.float32, (3,)
raw_values = np.empty(data_len * 4, dtype=np.float32) elif data_type in ('BYTE_COLOR', 'FLOAT_COLOR'):
attr.data.foreach_get("color", raw_values) dtype, shape_ext = np.float32, (4,)
raw_values = raw_values.reshape(-1, 4) else: continue
elif attr.data_type == 'BYTE_COLOR':
temp_values = np.empty(data_len * 4, dtype=np.uint8) attributes_data[name] = {
attr.data.foreach_get("color", temp_values) "domain": "face",
raw_values = temp_values.astype(np.float32) / 255.0 "type": my_type,
raw_values = raw_values.reshape(-1, 4) "values": np.zeros((tris_count,) + shape_ext, dtype=dtype)
else: }
raw_values = np.empty(data_len, dtype=attr_dict["values"].dtype)
attr.data.foreach_get("value", raw_values) col_idx = 0
for trimesh in meshes:
tris_v_i_flat: np.ndarray = np.empty(trimesh.length_tris * 3, dtype=np.int32)
tris_v_n_flat: np.ndarray = np.empty(trimesh.length_tris * 3, dtype=np.float64)
tris_verts_flat: np.ndarray = np.empty(trimesh.length_verts * 3, dtype=np.float64)
trimesh.mesh.loop_triangles.foreach_get("vertices", tris_v_i_flat)
trimesh.mesh.loop_triangles.foreach_get("normal", tris_v_n_flat)
trimesh.mesh.vertices.foreach_get("co", tris_verts_flat)
tris_v_i: np.ndarray = tris_v_i_flat.reshape((-1, 3))
tris_v_n: np.ndarray = tris_v_n_flat.reshape((-1, 3))
tris_verts: np.ndarray = tris_verts_flat.reshape((-1, 3))
homogeneous_verts: NDArray[float64] = np.hstack((tris_verts, np.ones((tris_verts.shape[0], 1)))) # type: ignore
tx_verts = homogeneous_verts @ trimesh.matrix_world
tx_verts = (tx_verts[:, :3]) * scale
homogeneous_norm: NDArray[float64] = np.hstack((tris_v_n, np.ones((tris_v_n.shape[0], 1)))) # type: ignore
tx_norm = homogeneous_norm @ trimesh.matrix_world.T
tx_norm = tx_norm[:, :3]
tx_norm = tx_norm / np.linalg.norm(tx_norm, axis=1, keepdims=True)
tx_norm = tx_norm[:, np.newaxis, :]
tx_tris = tx_verts[tris_v_i]
tris_coords_and_norm: NDArray[float64] = np.concatenate((tx_tris, tx_norm), axis=1)
tris[col_idx:col_idx + trimesh.length_tris,:] = tris_coords_and_norm
# Attributes
if attributes_data:
poly_indices = np.empty(trimesh.length_tris, dtype=np.int32)
trimesh.mesh.loop_triangles.foreach_get("polygon_index", poly_indices)
for name, attr_dict in attributes_data.items():
if name in trimesh.mesh.attributes:
attr = trimesh.mesh.attributes[name]
data_len = len(attr.data)
attr_dict["values"][col_idx:col_idx + trimesh.length_tris] = raw_values[poly_indices] if attr.data_type == 'FLOAT_VECTOR':
raw_values = np.empty(data_len * 3, dtype=np.float32)
attr.data.foreach_get("vector", raw_values)
raw_values = raw_values.reshape(-1, 3)
elif attr.data_type == 'FLOAT_COLOR':
raw_values = np.empty(data_len * 4, dtype=np.float32)
attr.data.foreach_get("color", raw_values)
raw_values = raw_values.reshape(-1, 4)
elif attr.data_type == 'BYTE_COLOR':
temp_values = np.empty(data_len * 4, dtype=np.uint8)
attr.data.foreach_get("color", temp_values)
raw_values = temp_values.astype(np.float32) / 255.0
raw_values = raw_values.reshape(-1, 4)
else:
raw_values = np.empty(data_len, dtype=attr_dict["values"].dtype)
attr.data.foreach_get("value", raw_values)
attr_dict["values"][col_idx:col_idx + trimesh.length_tris] = raw_values[poly_indices]
col_idx += trimesh.length_tris col_idx += trimesh.length_tris
return tris, attributes_data return tris, attributes_data
def objects_to_tris(objects: list[Object], scale) -> tuple[NDArray[float64], dict[str, dict]]: def objects_to_tris(objects: list[Object], scale) -> tuple[NDArray[float64], dict[str, dict]]:
obj_names = tuple(o.name for o in objects) obj_names = tuple(o.name for o in objects)
@ -584,17 +643,10 @@ def _cached_capture_mesh_edges(
obj = bpy.data.objects.get(obj_name) obj = bpy.data.objects.get(obj_name)
if not obj: return [], [], [], {} if not obj: return [], [], [], {}
try: with get_evaluated_mesh(obj) as (eval_obj, mesh):
depsgraph = bpy.context.evaluated_depsgraph_get() if not mesh or not mesh.vertices:
obj_eval = obj.evaluated_get(depsgraph) return [], [], [], {}
mesh = obj_eval.to_mesh(preserve_all_data_layers=True, depsgraph=depsgraph)
except Exception:
return [], [], [], {}
if not mesh or not mesh.vertices:
return [], [], [], {}
try:
world_mat = np.array(matrix_tuple).reshape(4, 4) world_mat = np.array(matrix_tuple).reshape(4, 4)
num_verts = len(mesh.vertices) num_verts = len(mesh.vertices)
verts = np.empty((num_verts, 3), dtype=np.float64) verts = np.empty((num_verts, 3), dtype=np.float64)
@ -655,10 +707,6 @@ def _cached_capture_mesh_edges(
return final_paths, final_e_mults, final_f_rates, final_extras return final_paths, final_e_mults, final_f_rates, final_extras
finally:
if hasattr(obj_eval, "to_mesh_clear"):
obj_eval.to_mesh_clear()
def capture_mesh_edges(obj: Object, e_attr_name: str = "e_mult", f_attr_name: str = "f_rate", extra_attrs: dict[str, str] | None = None) -> tuple[list[NDArray[float64]], list[NDArray[float64]], list[NDArray[float64]], dict[str, list[NDArray[float64]]]]: def capture_mesh_edges(obj: Object, e_attr_name: str = "e_mult", f_attr_name: str = "f_rate", extra_attrs: dict[str, str] | None = None) -> tuple[list[NDArray[float64]], list[NDArray[float64]], list[NDArray[float64]], dict[str, list[NDArray[float64]]]]:
if not obj or not obj.data: return [], [], [], {} if not obj or not obj.data: return [], [], [], {}