def fix_mesh(mesh, detail="normal"):
bbox_min, bbox_max = mesh.bbox;
diag_len = norm(bbox_max - bbox_min);
if detail == "normal":
target_len = diag_len * 1e-2;
#target_len = diag_len * 5e-3;
elif detail == "enormal":
target_len = diag_len * 5e-3
elif detail == "high":
target_len = diag_len * 3e-3
#target_len = diag_len * 2.5e-3;
elif detail == "low":
target_len = diag_len * 1e-2;
elif detail == "ehigh":
target_len = diag_len * 1e-3;
print("Target resolution: {} mm".format(target_len));
count = 0;
mesh, __ = pymesh.remove_degenerated_triangles(mesh, 100);
mesh, __ = pymesh.split_long_edges(mesh, target_len);
num_vertices = mesh.num_vertices;
while True:
#mesh, __ = pymesh.collapse_short_edges(mesh, 1e-6);
if detail == "low":
mesh, __ = pymesh.collapse_short_edges(mesh, target_len, preserve_feature=False);
else:
mesh, __ = pymesh.collapse_short_edges(mesh, target_len, preserve_feature=True);
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 150.0, 100);
if mesh.num_vertices == num_vertices:
break;
num_vertices = mesh.num_vertices;
print("#v: {}".format(num_vertices));
count += 1;
if count > 10: break;
mesh = pymesh.resolve_self_intersection(mesh);
mesh, __ = pymesh.remove_duplicated_faces(mesh);
mesh = pymesh.compute_outer_hull(mesh);
mesh, __ = pymesh.remove_duplicated_faces(mesh);
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 179.0, 5);
mesh, __ = pymesh.remove_isolated_vertices(mesh);
return mesh;
def fix_mesh(mesh, resolution, detail="normal"):
bbox_min, bbox_max = mesh.bbox
diag_len = norm(bbox_max - bbox_min)
if detail == "normal":
target_len = diag_len * 5e-3
elif detail == "high":
target_len = diag_len * 2.5e-3
elif detail == "low":
target_len = diag_len * 1e-2
target_len = resolution
#print("Target resolution: {} mm".format(target_len));
# PGC 2017: Remove duplicated vertices first
mesh, _ = pymesh.remove_duplicated_vertices(mesh, 0.001)
count = 0
print "Removing degenerated triangles"
mesh, __ = pymesh.remove_degenerated_triangles(mesh, 100)
mesh, __ = pymesh.split_long_edges(mesh, target_len)
num_vertices = mesh.num_vertices
while True:
mesh, __ = pymesh.collapse_short_edges(mesh, 1e-6)
mesh, __ = pymesh.collapse_short_edges(mesh,
target_len,
preserve_feature=True)
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 150.0, 100)
if mesh.num_vertices == num_vertices:
break
num_vertices = mesh.num_vertices
#print("#v: {}".format(num_vertices));
count += 1
if count > 10: break
mesh = pymesh.resolve_self_intersection(mesh)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
mesh = pymesh.compute_outer_hull(mesh)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 179.0, 5)
mesh, __ = pymesh.remove_isolated_vertices(mesh)
mesh, _ = pymesh.remove_duplicated_vertices(mesh, 0.001)
return mesh
def fix_mesh(mesh, target_len):
bbox_min, bbox_max = mesh.bbox
diag_len = np.linalg.norm(bbox_max - bbox_min)
count = 0
print(" remove degenerated triangles")
mesh, __ = pymesh.remove_degenerated_triangles(mesh, 100)
print(" split long edges")
mesh, __ = pymesh.split_long_edges(mesh, target_len)
num_vertices = mesh.num_vertices
while True:
print(" pass %d" % count)
print(" collapse short edges #1")
mesh, __ = pymesh.collapse_short_edges(mesh, 1e-6)
print(" collapse short edges #2")
mesh, __ = pymesh.collapse_short_edges(mesh,
target_len,
preserve_feature=True)
print(" remove obtuse triangles")
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 150.0, 100)
print(" %d of %s vertices." % (num_vertices, mesh.num_vertices))
if mesh.num_vertices == num_vertices:
break
num_vertices = mesh.num_vertices
count += 1
if count > 10: break
print(" resolve self intersection")
mesh = pymesh.resolve_self_intersection(mesh)
print(" remove duplicated faces")
mesh, __ = pymesh.remove_duplicated_faces(mesh)
print(" computer outer hull")
mesh = pymesh.compute_outer_hull(mesh)
print(" remove duplicated faces")
mesh, __ = pymesh.remove_duplicated_faces(mesh)
print(" remove obtuse triangles")
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 179.0, 5)
print(" remove isolated vertices")
mesh, __ = pymesh.remove_isolated_vertices(mesh)
return mesh
def __fix_mesh(self, mesh, improvement_thres=0.8):
mesh, __ = pymesh.split_long_edges(mesh, self.mesh_target_len)
num_vertices = len(mesh.vertices)
for __ in range(10):
mesh, __ = pymesh.collapse_short_edges(mesh, 1e-6)
mesh, __ = pymesh.collapse_short_edges(
mesh, self.mesh_target_len, preserve_feature=True
)
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 150.0, 100)
if len(mesh.vertices) < num_vertices * improvement_thres:
break
mesh = pymesh.resolve_self_intersection(mesh)
mesh, __ = pymesh.collapse_short_edges(mesh, 1e-6)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 179.0, 5)
mesh, __ = pymesh.remove_isolated_vertices(mesh)
return mesh
def old_fix_mesh(vertices, faces, detail="normal"):
bbox_min = np.amin(vertices, axis=0)
bbox_max = np.amax(vertices, axis=0)
diag_len = norm(bbox_max - bbox_min)
if detail == "normal":
target_len = diag_len * 5e-3
elif detail == "high":
target_len = diag_len * 2.5e-3
elif detail == "low":
target_len = diag_len * 1e-2
print("Target resolution: {} mm".format(target_len))
count = 0
vertices, faces = pymesh.split_long_edges(vertices, faces, target_len)
num_vertices = len(vertices)
while True:
vertices, faces = pymesh.collapse_short_edges(vertices, faces, 1e-6)
vertices, faces = pymesh.collapse_short_edges(vertices,
faces,
target_len,
preserve_feature=True)
vertices, faces = pymesh.remove_obtuse_triangles(
vertices, faces, 150.0, 100)
if num_vertices == len(vertices):
break
num_vertices = len(vertices)
print("#v: {}".format(num_vertices))
count += 1
if count > 10: break
vertices, faces = pymesh.resolve_self_intersection(vertices, faces)
vertices, faces = pymesh.remove_duplicated_faces(vertices, faces)
vertices, faces, _ = pymesh.compute_outer_hull(vertices, faces, False)
vertices, faces = pymesh.remove_duplicated_faces(vertices, faces)
vertices, faces = pymesh.remove_obtuse_triangles(vertices, faces, 179.0, 5)
vertices, faces, voxels = pymesh.remove_isolated_vertices(vertices, faces)
return vertices, faces
def fix_mesh(mesh, detail="normal"):
bbox_min, bbox_max = mesh.bbox;
diag_len = norm(bbox_max - bbox_min);
if detail == "normal":
target_len = diag_len * 5e-3;
elif detail == "high":
target_len = diag_len * 2.5e-3;
elif detail == "low":
target_len = diag_len * 1e-2;
print("Target resolution: {} mm".format(target_len));
count = 0;
mesh, __ = pymesh.remove_degenerated_triangles(mesh, 100);
mesh, __ = pymesh.split_long_edges(mesh, target_len);
num_vertices = mesh.num_vertices;
while True:
mesh, __ = pymesh.collapse_short_edges(mesh, 1e-6);
mesh, __ = pymesh.collapse_short_edges(mesh, target_len,
preserve_feature=True);
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 150.0, 100);
if mesh.num_vertices == num_vertices:
break;
num_vertices = mesh.num_vertices;
print("#v: {}".format(num_vertices));
count += 1;
if count > 10: break;
mesh = pymesh.resolve_self_intersection(mesh);
mesh, __ = pymesh.remove_duplicated_faces(mesh);
mesh = pymesh.compute_outer_hull(mesh);
mesh, __ = pymesh.remove_duplicated_faces(mesh);
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 179.0, 5);
mesh, __ = pymesh.remove_isolated_vertices(mesh);
return mesh;
def fix_mesh(mesh):
mesh, __ = pymesh.remove_degenerated_triangles(mesh, 100)
log_mesh(mesh, "Remove degenerate faces")
mesh, __ = pymesh.collapse_short_edges(mesh, MIN_RES, preserve_feature=True)
log_mesh(mesh, "Collapse short edges")
mesh = pymesh.resolve_self_intersection(mesh)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
log_mesh(mesh, "Remove self intersections")
mesh = pymesh.compute_outer_hull(mesh)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
log_mesh(mesh, "New hull, remove duplicates")
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 179.5, 5)
log_mesh(mesh, "Remote obtuse faces")
mesh, __ = pymesh.remove_isolated_vertices(mesh)
log_mesh(mesh, "Remove isolated vertices")
return mesh
def execute(self, context):
scene = context.scene
pymesh_props = scene.pymesh
obj_a = context.active_object
mesh_a = import_object(context, obj_a)
pymesh_r, info = pymesh.remove_degenerated_triangles(mesh_a)
pymesh_r, info = pymesh.remove_obtuse_triangles(pymesh_r)
pymesh_r, info = pymesh.remove_duplicated_faces(pymesh_r)
pymesh_r, info = pymesh.collapse_short_edges(pymesh_r)
pymesh_r, info = pymesh.remove_duplicated_vertices(pymesh_r)
pymesh_r, info = pymesh.remove_isolated_vertices(pymesh_r)
off_name = "Py.Clean." + obj_a.name
mesh_r = export_mesh(context, pymesh_r, off_name)
add_to_scene(context, mesh_r)
return {'FINISHED'}
def filter(self):
mesh = pymesh.form_mesh(self.mesh.points.values,
self.mesh.cells.values)
mesh, _ = pymesh.remove_degenerated_triangles(mesh,
self.max_iterations)
mesh, _ = pymesh.split_long_edges(mesh, self.size)
num_vertices = mesh.num_vertices
for _ in range(self.max_iterations):
mesh, _ = pymesh.collapse_short_edges(mesh,
self.size,
preserve_feature=True)
mesh, _ = pymesh.remove_obtuse_triangles(mesh, self.max_angle,
self.max_iterations)
if mesh.num_vertices == num_vertices:
break
num_vertices = mesh.num_vertices
return self.mesh.mesh_class()(mesh, parents=[self.mesh])
def fix_meshes(mesh, detail="normal"):
"""
A pipeline to optimise and fix mesh based on pymesh Mesh object.
1. A box is created around the mesh.
2. A target length is found based on diagonal of the mesh box.
3. You can choose between 3 level of details, normal details settings seems to be a good compromise between
final mesh size and sufficient number of vertices. It highly depends on your final goal.
4. Remove degenerated triangles aka collinear triangles composed of 3 aligned points. The number of iterations is 5
and should remove all degenerated triangles
5. Remove isolated vertices, not connected to any faces or edges
6. Remove self intersection edges and faces which is not realistic
7. Remove duplicated faces
8. The removing of duplicated faces can leave some vertices alone, we will removed them
9. The calculation of outer hull volume is useful to be sure that the mesh is still ok
10. Remove obtuse triangles > 179 who is not realistic and increase computation time
11. We will remove potential duplicated faces again
12. And duplicated vertices again
13. Finally we will look if the mesh is broken or not. If yes we will try lower settings, if the lowest settings
broke the mesh we will return the initial mesh. If not, we will return the optimised mesh.
:param mesh: Pymesh Mesh object to optimise
:param detail: string 'high', 'normal' or 'low' ('normal' as default), or float/int
Settings to choose the targeting minimum length of edges
:return: Pymesh Mesh object
An optimised mesh or not depending on detail settings and mesh quality
"""
meshCopy = mesh
# copy/pasta of pymesh script fix_mesh from qnzhou, see pymesh on GitHub
bbox_min, bbox_max = mesh.bbox
diag_len = np.linalg.norm(bbox_max - bbox_min)
if detail == "normal":
target_len = diag_len * 5e-3
elif detail == "high":
target_len = diag_len * 2.5e-3
elif detail == "low":
target_len = diag_len * 1e-2
elif detail is float or detail is int and detail > 0:
target_len = diag_len * detail
else:
print(
'Details settings is invalid, must be "low", "normal", "high" or positive int or float'
)
quit()
count = 0
mesh, __ = pymesh.remove_degenerated_triangles(mesh, 5)
mesh, __ = pymesh.split_long_edges(mesh, target_len)
num_vertices = mesh.num_vertices
while True:
mesh, __ = pymesh.collapse_short_edges(mesh,
target_len,
preserve_feature=True)
mesh, info = pymesh.remove_obtuse_triangles(mesh, 179.0, 5)
if mesh.num_vertices == num_vertices:
break
num_vertices = mesh.num_vertices
count += 1
if count > 10:
break
mesh, __ = pymesh.remove_duplicated_vertices(mesh)
mesh, __ = pymesh.remove_isolated_vertices(mesh)
mesh = pymesh.resolve_self_intersection(mesh)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
mesh, __ = pymesh.remove_duplicated_vertices(mesh)
mesh = pymesh.compute_outer_hull(mesh)
mesh, __ = pymesh.remove_obtuse_triangles(mesh, 179.0, 5)
mesh, __ = pymesh.remove_duplicated_faces(mesh)
mesh, __ = pymesh.remove_isolated_vertices(mesh)
if is_mesh_broken(mesh, meshCopy) is True:
if detail == "high":
print(
f'The function fix_meshes broke mesh, trying with lower details settings'
)
fix_meshes(meshCopy, detail="normal")
return mesh
if detail == "normal":
print(
f'The function fix_meshes broke mesh, trying with lower details settings'
)
mesh = fix_meshes(meshCopy, detail="low")
return mesh
if detail == "low":
print(
f'The function fix_meshes broke mesh, no lower settings can be applied, no fix was done'
)
return meshCopy
else:
return mesh
