def create_from_setting(cls, setting):
""" Syntax:
{
"type": "boundary",
"mesh": mesh_file,
"color": color_name,
"radius": radius
}
"""
mesh = pymesh.load_mesh(setting["mesh"])
vertices = mesh.vertices
bd_edges = mesh.boundary_edges
vertices, bd_edges, __ = pymesh.remove_isolated_vertices_raw(
vertices, bd_edges)
wires = pymesh.wires.WireNetwork()
if len(bd_edges) > 0:
wires.load(vertices, bd_edges)
else:
logger = logging.getLogger(__name__)
logger.warning("Mesh ({}) contains no boundary.".format(
setting["mesh"]))
tmp_dir = tempfile.gettempdir()
stamp = datetime.datetime.now().isoformat()
wire_file = os.path.join(tmp_dir, "{}.wire".format(stamp))
wires.write_to_file(wire_file)
wire_setting = {
"type": "wire_network",
"wire_network": wire_file,
"color": setting.get("color", None),
"radius": setting.get("radius", 0.1),
"bbox": mesh.bbox,
}
return WireView.create_from_setting(wire_setting)
def slice_mesh(mesh, N):
bbox_min, bbox_max = mesh.bbox;
min_corner = [bbox_min[0] -1.0, bbox_min[1] - 1.0, bbox_min[2] - 1.0];
output_wires = [];
for i in range(N):
ratio = float(i) / float(N);
slice_val = bbox_min[0] * ratio + bbox_max[0] * (1-ratio);
max_corner = [slice_val, bbox_max[1] + 1.0, bbox_max[2] + 1.0];
box = pymesh.generate_box_mesh(min_corner, max_corner);
diff = pymesh.boolean(box, mesh, "difference");
#pymesh.save_mesh("tmp_{}.msh".format(i), diff);
vertices = diff.vertices;
y_out_range = np.logical_or(
vertices[:,1] < bbox_min[1],
vertices[:,1] > bbox_max[1]);
z_out_range = np.logical_or(
vertices[:,2] < bbox_min[2],
vertices[:,2] > bbox_max[2]);
on_outside = np.logical_or(y_out_range, z_out_range);
if not np.any(on_outside): continue;
edges = [];
for f in diff.faces:
if np.sum(on_outside[f]) == 1:
if on_outside[f[0]]:
edges.append([f[1], f[2]]);
if on_outside[f[1]]:
edges.append([f[2], f[0]]);
if on_outside[f[2]]:
edges.append([f[0], f[1]]);
if len(edges) == 0: continue;
edges = np.array(edges, dtype=int);
below_ground = vertices[:,1] < 0.5*(bbox_min[1]+bbox_max[1]);
edges_below_ground = np.any(below_ground[edges], axis=1);
edges = edges[np.logical_not(edges_below_ground)];
vertices, edges, __ = \
pymesh.remove_isolated_vertices_raw(vertices, edges);
wires = pymesh.wires.WireNetwork.create_from_data(vertices, edges);
output_wires.append(wires);
print('.',end="",flush=True)
print("done");
return output_wires;
def extract_submesh(mesh, face_indices, n_ring):
vertices = mesh.vertices
selected_faces = np.zeros(mesh.num_faces, dtype=bool)
selected_faces[face_indices] = True
ring_index = np.zeros(mesh.num_faces, dtype=int)
ring_index[selected_faces] += 1
for i in range(n_ring):
selected_faces = expand_by_one_ring(mesh, selected_faces)
ring_index[selected_faces] += 1
selected_face_indices = np.arange(mesh.num_faces)[selected_faces]
faces = mesh.faces[selected_faces]
ring_index = (ring_index[selected_faces] - n_ring - 1) * (-1)
vertices, faces, __ = pymesh.remove_isolated_vertices_raw(vertices, faces)
mesh = pymesh.form_mesh(vertices, faces)
mesh.add_attribute("ori_face_index")
mesh.set_attribute("ori_face_index", selected_face_indices)
mesh.add_attribute("ring")
mesh.set_attribute("ring", ring_index)
return mesh
def extract_submesh(mesh, face_indices, n_ring):
vertices = mesh.vertices;
selected_faces = np.zeros(mesh.num_faces, dtype=bool);
selected_faces[face_indices] = True;
ring_index = np.zeros(mesh.num_faces, dtype=int);
ring_index[selected_faces] += 1;
for i in range(n_ring):
selected_faces = expand_by_one_ring(mesh, selected_faces);
ring_index[selected_faces] += 1;
selected_face_indices = np.arange(mesh.num_faces)[selected_faces];
faces = mesh.faces[selected_faces];
ring_index = (ring_index[selected_faces] - n_ring - 1) * (-1);
vertices, faces, __ = pymesh.remove_isolated_vertices_raw(vertices, faces);
mesh = pymesh.form_mesh(vertices, faces);
mesh.add_attribute("ori_face_index");
mesh.set_attribute("ori_face_index", selected_face_indices);
mesh.add_attribute("ring");
mesh.set_attribute("ring", ring_index);
return mesh;
def makeMesh(self, path2file, do_clean=False):
path, file_name = os.path.split(path2file)
fname, fext = os.path.splitext(file_name)
# read image
stack_tif = io.imread(path2file, plugin='tifffile')
print('tif shape: {}'.format(stack_tif.shape), flush=True)
bin_stack_tif = stack_tif.astype(bool).astype(np.int16)
# clean from isolated and small pixels (optional)
if do_clean:
bin_stack_tif = self.erode_converge(bin_stack_tif)
bin_stack_tif = self.clean_not_attached(bin_stack_tif)
print('Saving image after cleaning', flush=True)
io.imsave("aux.tif", (255*bin_stack_tif).astype(np.uint8), plugin='tifffile')
bin_stack_tif = binary_erosion(bin_stack_tif, iterations=1)
# create 1 pixel layer to make close meshes
NZ = bin_stack_tif.shape[0]
NY = bin_stack_tif.shape[1]
NX = bin_stack_tif.shape[2]
aux = np.zeros((NZ + 10, NY + 10, NX + 10))
aux[5:NZ + 5, 5:NY + 5, 5:NX + 5] = bin_stack_tif
print('Triangulation of a set of points ...', flush=True)
aux = aux.astype(np.float32)
aux = filters.gaussian_filter(aux, 2.0, truncate=1.0)
maxA = np.max(aux)
aux = aux / maxA * 4.0 - 1.0
# aux = aux * 4.0 - 1.0
minA = np.min(aux)
maxA = np.max(aux)
print('Cleaning memory', flush=True)
del stack_tif
del bin_stack_tif
gc.collect()
print("min aux: {} max aux: {}".format(minA, maxA), flush=True)
verts, faces, normals, values = measure.marching_cubes_lewiner(aux, 0)
print('Cleaning memory', flush=True)
del aux
gc.collect()
print("Mesh data 0:",flush=True)
print("Verts: {} Faces: {}".format(verts.shape, faces.shape))
print('Remove isolated vertices', flush=True)
verts, faces, info = pymesh.remove_isolated_vertices_raw(verts, faces)
print(info, flush=True)
print("Mesh data 1:",flush=True)
print("Verts: {} Faces: {}".format(verts.shape, faces.shape))
print('Remove duplicated vertices', flush=True)
verts, faces, info = pymesh.remove_duplicated_vertices_raw(verts, faces)
print(info, flush=True)
print("Mesh data 2:",flush=True)
print("Verts: {} Faces: {}".format(verts.shape, faces.shape))
verts = verts - 5.0
print('Set the mesh ...', flush=True)
final_mesh = pymesh.form_mesh(verts, faces)
savefilename = "{}.obj".format(fname)
savefilepath = os.path.join('./', savefilename)
print("saving file {}".format(savefilename), flush=True)
pymesh.save_mesh(savefilepath, final_mesh)
print('done.', flush=True)
def bevel(wires, logger, remove_holes, dist):
bbox_min, bbox_max = wires.bbox
#wires = uniform_sampling(wires);
mesh = constrained_triangulate(wires, logger, remove_holes)
cell_ids = mesh.get_attribute("cell").ravel().astype(int)
num_cells = np.amax(cell_ids) + 1
comps = []
for i in range(num_cells):
to_keep = np.arange(mesh.num_faces, dtype=int)[cell_ids == i]
if not np.any(to_keep):
continue
cut_mesh = pymesh.submesh(mesh, to_keep, 0)
bd_edges = cut_mesh.boundary_edges
vertices, edges, __ = pymesh.remove_isolated_vertices_raw(
cut_mesh.vertices, bd_edges)
bd_wires = pymesh.wires.WireNetwork.create_from_data(vertices, edges)
offset_dir = np.zeros((bd_wires.num_vertices, 2))
for ei in edges:
v0 = ei[0]
v1 = ei[1]
adj_vts = bd_wires.get_vertex_neighbors(v0)
if len(adj_vts) == 2:
if adj_vts[0] == v1:
vp = adj_vts[1]
else:
vp = adj_vts[0]
e0 = vertices[v1] - vertices[v0]
e1 = vertices[vp] - vertices[v0]
e0 /= norm(e0)
e1 /= norm(e1)
theta = math.atan2(e0[0] * e1[1] - e0[1] * e1[0], e0.dot(e1))
if abs(theta) > 0.99 * math.pi:
offset = np.array([-e0[1], e0[0]])
scale = 1.0
else:
if theta > 0:
offset = e0 + e1
scale = math.sin(theta / 2)
else:
offset = -e0 - e1
scale = math.cos(math.pi / 2 + theta / 2)
offset /= norm(offset)
offset_dir[v0] = offset * dist / scale
offset_vertices = vertices + offset_dir
vertices = np.vstack((vertices, offset_vertices))
edges = np.vstack((edges, edges + bd_wires.num_vertices))
vertices, edges, __ = pymesh.remove_duplicated_vertices_raw(
vertices, edges, dist / 2)
comp_wires = pymesh.wires.WireNetwork.create_from_data(
vertices, edges)
comp = constrained_triangulate(comp_wires, logger, True)
comps.append(comp)
mesh = pymesh.merge_meshes(comps)
bd_vertices = mesh.boundary_vertices
is_inside = np.ones(mesh.num_vertices, dtype=bool)
is_inside[bd_vertices] = False
vertices = np.hstack((mesh.vertices, np.zeros((mesh.num_vertices, 1))))
vertices[is_inside, 2] = dist
mesh = pymesh.form_mesh(vertices, mesh.faces)
return mesh
def bevel(wires, logger, remove_holes, dist):
bbox_min, bbox_max = wires.bbox;
#wires = uniform_sampling(wires);
mesh = constrained_triangulate(wires, logger, remove_holes);
cell_ids = mesh.get_attribute("cell").ravel().astype(int);
num_cells = np.amax(cell_ids) + 1;
comps = [];
for i in range(num_cells):
to_keep = np.arange(mesh.num_faces, dtype=int)[cell_ids == i];
if not np.any(to_keep):
continue;
cut_mesh = pymesh.submesh(mesh, to_keep, 0);
bd_edges = cut_mesh.boundary_edges;
vertices, edges, __ = pymesh.remove_isolated_vertices_raw(
cut_mesh.vertices, bd_edges);
bd_wires = pymesh.wires.WireNetwork.create_from_data(vertices, edges);
offset_dir = np.zeros((bd_wires.num_vertices, 2));
for ei in edges:
v0 = ei[0];
v1 = ei[1];
adj_vts = bd_wires.get_vertex_neighbors(v0);
if len(adj_vts) == 2:
if adj_vts[0] == v1:
vp = adj_vts[1];
else:
vp = adj_vts[0];
e0 = vertices[v1] - vertices[v0];
e1 = vertices[vp] - vertices[v0];
e0 /= norm(e0);
e1 /= norm(e1);
theta = math.atan2(e0[0]*e1[1] - e0[1]*e1[0], e0.dot(e1));
if abs(theta) > 0.99 * math.pi:
offset = np.array([-e0[1], e0[0]]);
scale = 1.0;
else:
if theta > 0:
offset = e0 + e1;
scale = math.sin(theta/2);
else:
offset = -e0 - e1
scale = math.cos(math.pi/2 + theta/2);
offset /= norm(offset);
offset_dir[v0] = offset * dist / scale;
offset_vertices = vertices + offset_dir;
vertices = np.vstack((vertices, offset_vertices));
edges = np.vstack((edges, edges + bd_wires.num_vertices));
vertices, edges, __ = pymesh.remove_duplicated_vertices_raw(
vertices, edges, dist/2);
comp_wires = pymesh.wires.WireNetwork.create_from_data(vertices, edges);
comp = constrained_triangulate(comp_wires, logger, True);
comps.append(comp);
mesh = pymesh.merge_meshes(comps);
bd_vertices = mesh.boundary_vertices;
is_inside = np.ones(mesh.num_vertices, dtype=bool);
is_inside[bd_vertices] = False;
vertices = np.hstack((mesh.vertices, np.zeros((mesh.num_vertices, 1))));
vertices[is_inside, 2] = dist;
mesh = pymesh.form_mesh(vertices, mesh.faces);
return mesh;
