def main():
args = parse_args();
input_meshes = [load_mesh(filename) for filename in args.input_meshes];
output_mesh = merge_meshes(input_meshes);
save_mesh(args.output, output_mesh,
*output_mesh.get_attribute_names());
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
mesh.add_attribute("vertex_index");
mesh.add_attribute("face_index");
mesh.add_attribute("voxel_index");
pymesh.save_mesh(args.output_mesh, mesh, *mesh.attribute_names);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
f_indices = pymesh.get_degenerated_faces(mesh);
if (len(f_indices) == 0):
print("mesh does not have any degenerated faces");
return;
v_indices = mesh.faces[f_indices].ravel();
degenerated_faces = np.zeros(mesh.num_faces);
degenerated_faces[f_indices] = 1.0;
degenerated = np.zeros(mesh.num_vertices);
degenerated[v_indices] = 1.0;
mesh.add_attribute("degenerated_faces");
mesh.set_attribute("degenerated_faces", degenerated_faces);
mesh.add_attribute("degenerated");
mesh.set_attribute("degenerated", degenerated);
print("{} degenerated faces, consisting of {} vertices.".format(
len(f_indices), np.count_nonzero(degenerated)));
if args.verbose:
print("Degenerated faces indices: {}".format(f_indices));
pymesh.save_mesh(args.output_mesh, mesh, "degenerated", "degenerated_faces");
if args.extract_region is not None:
region = pymesh.submesh(mesh, f_indices, 0);
pymesh.save_mesh(args.extract_region, region,
*region.get_attribute_names());
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.in_mesh);
if (args.with_rounding):
mesh = pymesh.form_mesh(
np.round(mesh.vertices, args.precision),
mesh.faces);
intersecting_faces = pymesh.detect_self_intersection(mesh);
counter = 0;
while len(intersecting_faces) > 0 and counter < args.max_iterations:
if (args.with_rounding):
involved_vertices = np.unique(mesh.faces[intersecting_faces].ravel());
mesh.vertices_ref[involved_vertices, :] =\
np.round(mesh.vertices[involved_vertices, :],
args.precision//2);
mesh = pymesh.resolve_self_intersection(mesh, "igl");
mesh, __ = pymesh.remove_duplicated_faces(mesh, fins_only=True);
if (args.with_rounding):
mesh = pymesh.form_mesh(
np.round(mesh.vertices, args.precision),
mesh.faces);
intersecting_faces = pymesh.detect_self_intersection(mesh);
counter += 1;
if len(intersecting_faces) > 0:
logging.warn("Resolving failed: max iteration reached!");
pymesh.save_mesh(args.out_mesh, mesh);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
if (mesh.vertex_per_face != 4):
raise IOError("input mesh is not a quad mesh");
mesh = pymesh.quad_to_tri(mesh, args.keep_symmetry);
pymesh.save_mesh(args.output_mesh, mesh, *mesh.get_attribute_names());
def main():
args = parse_args();
mesh = load_mesh(args.mesh_in);
comps = separate_mesh(mesh, args.connectivity_type);
if args.highlight:
if (args.connectivity_type == "face"):
comp_indicator = np.zeros(mesh.num_faces);
elif (args.connectivity_type == "voxel"):
comp_indicator = np.zeros(mesh.num_voxels);
elif (mesh.num_voxels > 0):
comp_indicator = np.zeros(mesh.num_voxels);
else:
comp_indicator = np.zeros(mesh.num_faces);
for i in range(len(comps)):
elem_sources = comps[i].get_attribute("ori_elem_index")\
.ravel().astype(int);
comp_indicator[elem_sources] = i;
mesh.add_attribute("component_index");
mesh.set_attribute("component_index", comp_indicator);
save_mesh(args.mesh_out, mesh, *mesh.get_attribute_names());
else:
basename, ext = os.path.splitext(args.mesh_out);
for i,comp in enumerate(comps):
filename = "{}_cc{}{}".format(basename, i, ext);
save_mesh(filename, comp, *comp.get_attribute_names());
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
vertices = mesh.vertices;
voxels = mesh.voxels;
num_voxels = mesh.num_voxels;
orientation = np.zeros(num_voxels);
for i in range(num_voxels):
tet = voxels[i];
orientation[i] = pymesh.orient_3D(
vertices[tet[1]],
vertices[tet[0]],
vertices[tet[2]],
vertices[tet[3]]);
if orientation[i] < 0:
orientation[i] = -1;
elif orientation[i] > 0:
orientation[i] = 1;
mesh.add_attribute("orientation");
mesh.set_attribute("orientation", orientation);
pymesh.save_mesh(args.output_mesh, mesh, "orientation");
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
mesh.add_attribute("vertex_gaussian_curvature");
mesh.add_attribute("vertex_mean_curvature");
pymesh.save_mesh(args.output_mesh, mesh, *mesh.get_attribute_names());
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
grid = pymesh.VoxelGrid(args.cell_size, mesh.dim);
grid.insert_mesh(mesh);
out_mesh = grid.mesh;
pymesh.save_mesh(args.output_mesh, out_mesh);
def map_boundary_to_sphere(mesh, basename):
bd_mesh = pymesh.form_mesh(mesh.vertices, mesh.faces);
bd_mesh, info = pymesh.remove_isolated_vertices(bd_mesh);
bd_vertices = np.copy(bd_mesh.vertices);
assembler = pymesh.Assembler(bd_mesh);
L = assembler.assemble("graph_laplacian");
# First, Laplacian smoothing to improve triangle quality.
for i in range(100):
c = np.mean(bd_vertices, axis=0);
bd_vertices = bd_vertices - c;
r = np.amax(norm(bd_vertices, axis=1));
bd_vertices /= r;
bd_vertices += L * bd_vertices;
if i%10 == 0:
sphere_mesh = pymesh.form_mesh(bd_vertices, bd_mesh.faces);
pymesh.save_mesh("{}_flow_{:03}.msh".format(basename, i), sphere_mesh);
# Then, run mean curvature flow.
sphere_mesh = pymesh.form_mesh(bd_vertices, bd_mesh.faces);
sphere_mesh = mean_curvature_flow(sphere_mesh, 100, use_graph_laplacian=True);
pymesh.save_mesh("{}_flow_final.msh".format(basename), sphere_mesh);
bd_vertices = sphere_mesh.vertices;
# Lastly, project vertices onto unit sphere.
bd_vertex_indices = info["ori_vertex_index"];
bd_vertex_positions = np.divide(bd_vertices, norm(bd_vertices,
axis=1).reshape((-1,1)));
return bd_vertex_indices, bd_vertex_positions;
def main():
args = parse_args();
config = parse_config_file(args.config_file);
if args.output is not None:
config["output"] = args.output;
mesh = tile(config);
pymesh.save_mesh(config["output"], mesh, *mesh.get_attribute_names());
def repousse(mesh, logger):
cell_ids = mesh.get_attribute("cell").ravel().astype(int);
mesh.add_attribute("edge_length");
tol = np.amax(mesh.get_attribute("edge_length")) * 0.1;
bbox_min, bbox_max = mesh.bbox;
scaling = 2.0 / norm(bbox_max - bbox_min);
start_time = time();
num_cells = np.amax(cell_ids)+1;
results = [];
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);
pymesh.save_mesh("debug.msh", cut_mesh);
cut_mesh, __ = pymesh.remove_degenerated_triangles(cut_mesh, 100);
cut_mesh, __ = pymesh.split_long_edges(cut_mesh, tol);
dof = cut_mesh.num_vertices;
assembler = pymesh.Assembler(cut_mesh);
L = assembler.assemble("laplacian");
M = assembler.assemble("mass");
L_rhs = M * np.ones(dof) * -0.5;
bd_indices = cut_mesh.boundary_vertices;
n = len(bd_indices);
C = scipy.sparse.coo_matrix((np.ones(n),
(np.arange(n, dtype=int), bd_indices)), shape=(n, dof));
C_rhs = np.zeros(n);
A = scipy.sparse.bmat([
[-L, C.T],
[C, None]
]);
rhs = np.concatenate((L_rhs.ravel(), C_rhs));
solver = pymesh.SparseSolver.create("SparseLU");
solver.compute(A);
x = solver.solve(rhs);
z = x[:dof].reshape((-1, 1));
vertices = np.hstack((cut_mesh.vertices, z));
out_mesh = pymesh.form_mesh(vertices, cut_mesh.faces);
results.append(out_mesh);
finish_time = time();
t = finish_time - start_time;
logger.info("Repousse running time: {}".format(t));
mesh = pymesh.merge_meshes(results);
vertices = mesh.vertices[:,:2];
mesh_2d = pymesh.form_mesh(vertices, mesh.faces);
pymesh.save_mesh("out_2d.msh", mesh_2d)
return mesh;
def main():
args = parse_args()
mesh = pymesh.load_mesh(args.input_mesh)
wires = pymesh.wires.WireNetwork.create_from_file(args.path)
path = chain_wires(wires)
result = pymesh.minkowski_sum(mesh, path)
pymesh.save_mesh(args.output_mesh, result)
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
mesh = pymesh.retriangulate(mesh,
args.max_area,
not args.no_split_boundary,
not args.no_steiner_points);
pymesh.save_mesh(args.output_mesh, mesh);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh, drop_zero_dim=True);
mesh,__ = pymesh.split_long_edges(mesh, 0.01);
points = mesh.vertices[mesh.boundary_vertices,:];
mesh = pymesh.triangulate_beta(points, args.engine);
pymesh.save_mesh(args.output_mesh, mesh);
pymesh.timethis.summarize();
def main():
args = parse_args()
mesh = pymesh.load_mesh(args.input_mesh)
if mesh.num_voxels <= 0:
raise RuntimeError("Input mesh contains 0 voxels.")
if mesh.vertex_per_voxel != 4:
raise RuntimeError("Input mesh is not a tet mesh.")
mesh = tet_to_hex(mesh)
pymesh.save_mesh(args.output_mesh, mesh)
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
out_mesh, info = pymesh.split_long_edges(mesh, args.max_edge_length);
if mesh.has_attribute("corner_texture"):
pymesh.map_corner_attribute(mesh, out_mesh, "corner_texture");
pymesh.save_mesh(args.output_mesh, out_mesh, *out_mesh.attribute_names);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
if (mesh.vertex_per_face != 4):
logging.warning("Input mesh is not quad mesh.");
pymesh.save_mesh(args.output_mesh, mesh, *mesh.get_attribute_names());
else:
mesh = pymesh.quad_to_tri(mesh, args.keep_symmetry);
pymesh.save_mesh(args.output_mesh, mesh, *mesh.get_attribute_names());
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh, drop_zero_dim=True);
r = pymesh.convex_hull(mesh, args.engine, args.with_timing);
if args.with_timing:
hull, running_time = r;
print("Running time: {}s".format(running_time));
else:
hull = r;
pymesh.save_mesh(args.output_mesh, hull, *hull.attribute_names);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
bd_edges = mesh.boundary_edges;
bd_vertices = np.unique(bd_edges.ravel());
is_bd_vertices = np.zeros(mesh.num_vertices);
is_bd_vertices[bd_vertices] = True;
mesh.add_attribute("boundary_vertices");
mesh.set_attribute("boundary_vertices", is_bd_vertices);
pymesh.save_mesh(args.output_mesh, mesh, *mesh.attribute_names);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
intersecting_faces = pymesh.detect_self_intersection(mesh);
intersection_marker = np.zeros(mesh.num_faces);
for i,face_pair in enumerate(intersecting_faces):
intersection_marker[face_pair] = i+1;
mesh.add_attribute("intersecting_faces");
mesh.set_attribute("intersecting_faces", intersection_marker);
pymesh.save_mesh(args.output_mesh, mesh, "intersecting_faces");
def main():
args = parse_args();
scale = np.ones(3) * args.scale;
if args.scale_x is not None:
scale[0] = args.scale_x;
if args.scale_y is not None:
scale[1] = args.scale_y;
if args.scale_z is not None:
scale[2] = args.scale_z;
mesh = pymesh.load_mesh(args.input_mesh);
mesh = pymesh.form_mesh(mesh.vertices * scale, mesh.faces, mesh.voxels);
pymesh.save_mesh(args.output_mesh, mesh);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
mesh.add_attribute("face_area");
areas = mesh.get_attribute("face_area");
zero_faces = areas == 0.0;
roi = np.zeros(mesh.num_vertices);
roi[mesh.faces[zero_faces]] = 1.0;
mesh.add_attribute("zero_faces");
mesh.set_attribute("zero_faces", roi);
pymesh.save_mesh(args.output_mesh, mesh, "zero_faces");
def main():
args = parse_args();
mesh1 = pymesh.load_mesh(args.input_mesh_1);
mesh2 = pymesh.load_mesh(args.input_mesh_2);
if args.timing:
mesh, t = pymesh.boolean(mesh1, mesh2, args.operation, args.engine,
with_timing = args.timing,
exact_mesh_file = args.exact);
print("Timing: {}".format(t));
else:
mesh = pymesh.boolean(mesh1, mesh2, args.operation, args.engine,
exact_mesh_file = args.exact);
pymesh.save_mesh(args.output_mesh, mesh, *mesh.get_attribute_names());
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
assert(mesh.has_attribute("corner_texture"));
mesh.enable_connectivity();
vertices = np.copy(mesh.vertices);
bad_vertex = np.logical_not(np.all(np.isfinite(mesh.vertices), axis=1));
bad_vertex_indices = np.arange(mesh.num_vertices, dtype=int)[bad_vertex];
for i in bad_vertex_indices:
adj_v = mesh.get_vertex_adjacent_vertices(i);
adj_v = adj_v[np.logical_not(bad_vertex[adj_v])];
vertices[i] = np.mean(vertices[adj_v,:], axis=0);
out_mesh = pymesh.form_mesh(vertices, mesh.faces);
if mesh.has_attribute("corner_texture"):
faces = mesh.faces;
uv = np.copy(mesh.get_attribute("corner_texture").reshape((-1, 2)));
bad_uv = np.logical_not(np.all(np.isfinite(uv), axis=1));
bad_uv_indices = np.arange(len(uv), dtype=int)[bad_uv];
for i in bad_uv_indices:
fi = i // mesh.vertex_per_face;
ci = i % mesh.vertex_per_face;
vi = faces[fi, ci];
adj_f = mesh.get_vertex_adjacent_faces(vi);
adj_c = [adj_f[j]*mesh.vertex_per_face +
np.argwhere(f==vi).ravel()[0]
for j,f in enumerate(faces[adj_f, :])];
adj_c = np.array(adj_c, dtype=int);
adj_c = adj_c[np.logical_not(bad_uv[adj_c])];
if len(adj_c) > 0:
uv[i] = np.mean(uv[adj_c,:], axis=0);
else:
# All corner uv at this vertex is NaN. Average the one-ring instead.
adj_c = [adj_f[j]*mesh.vertex_per_face +
(np.argwhere(f==vi).ravel()[0]+1)%mesh.vertex_per_face
for j,f in enumerate(faces[adj_f, :])];
adj_c += [adj_f[j]*mesh.vertex_per_face +
(np.argwhere(f==vi).ravel()[0]+2)%mesh.vertex_per_face
for j,f in enumerate(faces[adj_f, :])];
adj_c = np.array(adj_c, dtype=int);
adj_c = adj_c[np.logical_not(bad_uv[adj_c])];
uv[i] = np.mean(uv[adj_c,:], axis=0);
out_mesh.add_attribute("corner_texture");
out_mesh.set_attribute("corner_texture", uv);
pymesh.save_mesh(args.output_mesh, out_mesh);
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
formula = Formula(mesh);
values = formula.eval_formula(args.formula);
if isinstance(values, list):
values = np.array(values, dtype=float);
elif isinstance(values, (int, float)):
values = np.ones(mesh.num_elements, dtype=float) * values;
mesh.add_attribute(args.name);
mesh.set_attribute(args.name, values);
pymesh.save_mesh(args.output_mesh, mesh, *mesh.get_attribute_names());
def main():
args = parse_args();
mesh_1 = pymesh.load_mesh(args.input_mesh_1);
mesh_2 = pymesh.load_mesh(args.input_mesh_2);
assert(mesh_1.dim == 3);
assert(mesh_2.dim == 3);
bbox_min_1, bbox_max_1 = mesh_1.bbox;
bbox_min_2, bbox_max_2 = mesh_2.bbox;
bbox_min = np.minimum(bbox_min_1, bbox_min_2);
bbox_max = np.maximum(bbox_max_1, bbox_max_2);
#queries = grid_sample(bbox_min, bbox_max, args.num_samples);
queries = random_sample(bbox_min, bbox_max, args.num_samples);
winding_number_1 = pymesh.compute_winding_number(mesh_1, queries,
engine=args.winding_number_engine) > 0.5;
winding_number_2 = pymesh.compute_winding_number(mesh_2, queries,
engine=args.winding_number_engine) > 0.5;
diff = np.logical_xor(winding_number_1, winding_number_2);
num_diff = np.count_nonzero(diff);
print("Winding numbers of {} out of {} samples differ".format(
num_diff, len(queries)));
if args.output is not None:
r = np.amax(bbox_max - bbox_min) * 0.01;
box = pymesh.generate_box_mesh(np.ones(3) * -r, np.ones(3) * r);
vertices = [];
faces = [];
for i in range(len(queries)):
vertices.append(box.vertices + queries[i]);
faces.append(box.faces + box.num_vertices * i);
vertices = np.vstack(vertices);
faces = np.vstack(faces);
mesh = pymesh.form_mesh(vertices, faces);
mesh.add_attribute("diff");
mesh.set_attribute("diff", np.repeat(diff, box.num_faces));
pymesh.save_mesh(args.output, mesh, "diff");
if args.export:
info = load_info(args.input_mesh_2);
info["diff"] = num_diff
dump_info(args.input_mesh_2, info);
if args.timing:
pymesh.timethis.summarize();
def main():
args = parse_args();
in_mesh = load_mesh(args.input_mesh);
in_mesh.add_attribute("vertex_normal");
v_normals = in_mesh.get_vertex_attribute("vertex_normal");
out_mesh = form_mesh(in_mesh.vertices, np.zeros((0, 3), dtype=int));
out_mesh.add_attribute("nx");
out_mesh.add_attribute("ny");
out_mesh.add_attribute("nz");
out_mesh.set_attribute("nx", v_normals[:,0].ravel());
out_mesh.set_attribute("ny", v_normals[:,1].ravel());
out_mesh.set_attribute("nz", v_normals[:,2].ravel());
save_mesh(args.output_mesh, out_mesh, "nx", "ny", "nz");
def main():
args = parse_args();
# Config 0 Config 1 Config 2 Config 3
# 1 +----+ 2 3 +----+ 2 1 +----+ 0 3 + + 0
# | | | | | |
# 0 + + 3 0 +----+ 1 2 +----+ 3 2 +----+ 1
configs = np.array([
[[0, 3],[1, 2]],
[[0, 1],[3, 2]],
[[2, 3],[1, 0]],
[[2, 1],[3, 0]] ], dtype=int);
config_transform = np.array([
[1, 0, 0, 2],
[0, 1, 1, 3],
[3, 2, 2, 0],
[2, 3, 3, 1] ], dtype=int);
pts = np.zeros((4**args.resolution, 2));
for x in range(2**args.resolution):
for y in range(2**args.resolution):
X = x;
Y = y;
p = np.copy([x,y]);
quadrant = 0;
index = 0;
for order in range(args.resolution):
exp = args.resolution-order-1;
mask = 1 << exp;
step = 2**(args.resolution-order-1);
i = (X & mask) >> exp;
j = (Y & mask) >> exp;
local_index = configs[quadrant][i][j];
quadrant = config_transform[quadrant][local_index];
index += local_index * step*step;
X >> 1;
Y >> 1;
pts[index,:] = p;
vertices = np.array(pts);
edges = np.array([[i, i+1] for i in range(4**args.resolution - 1)]);
wires = pymesh.wires.WireNetwork.create_from_data(vertices, edges);
wires.write_to_file("tmp.obj");
inflator = pymesh.wires.Inflator(wires);
inflator.inflate(0.2);
mesh = inflator.mesh;
pymesh.save_mesh(args.output_mesh, mesh);
def main():
args = parse_args();
basename, ext = os.path.splitext(args.output_mesh);
mesh = pymesh.load_mesh(args.input_mesh);
mesh = generate_tet_mesh(mesh);
pymesh.save_mesh("{}_source.msh".format(basename), mesh);
bd_vertex_indices, bd_vertex_positions = map_boundary_to_sphere(
mesh, basename);
out_mesh = tutte_3D(mesh, bd_vertex_indices, bd_vertex_positions);
tet_orientations = pymesh.get_tet_orientations(out_mesh);
out_mesh.add_attribute("orientation");
out_mesh.set_attribute("orientation", tet_orientations);
pymesh.save_mesh(args.output_mesh, out_mesh, "orientation");
elif back != None:
c = back
a, info = pymesh.remove_isolated_vertices(a)
b, info = pymesh.remove_isolated_vertices(b)
c, info = pymesh.remove_isolated_vertices(c)
a, info = pymesh.remove_duplicated_faces(a)
b, info = pymesh.remove_duplicated_faces(b)
c, info = pymesh.remove_duplicated_faces(c)
if a == None and b == None and c == None:
print('No mesh to convert')
exit()
elif a != None and b != None and c != None:
a = pymesh.boolean(a, c, operation="intersection")
# a = pymesh.boolean(b, a, operation="intersection")
elif a != None and b != None and c == None:
a = pymesh.boolean(a, b, operation="intersection")
elif a != None and b == None and c != None:
a = pymesh.boolean(a, c, operation="intersection")
if a == None and b != None and c != None:
a = pymesh.boolean(b, c, operation="intersection")
pymesh.save_mesh(save_path + "/mesh.obj", a, ascii=True)
print('Koniec')
def __init__(self, nested_view, plane, interior_color, exterior_color,
cut_ratio):
super(ClippedView, self).__init__(nested_view);
self.plane = plane;
bbox_min, bbox_max = self.mesh.bbox;
center = bbox_min * cut_ratio + bbox_max * (1.0 - cut_ratio);
if plane == "+X":
should_keep = lambda v: v[0] > center[0];
elif plane == "+Y":
should_keep = lambda v: v[1] > center[1];
elif plane == "+Z":
should_keep = lambda v: v[2] > center[2];
elif plane == "-X":
should_keep = lambda v: v[0] < center[0];
elif plane == "-Y":
should_keep = lambda v: v[1] < center[1];
elif plane == "-Z":
should_keep = lambda v: v[2] < center[2];
elif isinstance(plane, list) and len(plane) == 4:
n = np.array(plane[:3]);
n = n / norm(n);
should_keep = lambda v: np.dot(v-center, n) < plane[3];
else:
raise NotImplementedError("Unknown plane type: {}".format(plane));
if len(self.view.voxels) > 0:
mesh = pymesh.form_mesh(self.view.vertices, np.array([]),
self.view.voxels);
mesh.add_attribute("voxel_centroid");
mesh.add_attribute("voxel_face_index");
voxel_face_id = mesh.get_voxel_attribute("voxel_face_index").astype(int);
centroids = mesh.get_voxel_attribute("voxel_centroid");
self.V_to_keep = [should_keep(v) for v in centroids];
voxels_to_keep = self.view.voxels[self.V_to_keep];
voxel_face_id = voxel_face_id[self.V_to_keep];
self.mesh = pymesh.form_mesh(self.view.vertices, np.zeros((0,3)), voxels_to_keep);
self.mesh.add_attribute("voxel_face_index");
new_voxel_face_id = self.mesh.get_voxel_attribute("voxel_face_index").astype(int);
old_vertex_colors = self.vertex_colors;
new_vertex_colors = np.zeros((self.mesh.num_faces, 3, 4));
cut_color = color_table[interior_color];
cut_color = np.array([cut_color.red, cut_color.green,
cut_color.blue, cut_color.alpha]);
is_interface = np.zeros(self.mesh.num_faces, dtype=bool);
for old_i,new_i in zip(voxel_face_id.ravel(), new_voxel_face_id.ravel()):
if new_i >= 0 and old_i >= 0:
new_vertex_colors[new_i] = old_vertex_colors[old_i];
elif new_i >= 0:
is_interface[new_i] = True;
new_vertex_colors[new_i,:] = cut_color;
self.vertex_colors = new_vertex_colors;
self.interface = pymesh.form_mesh(self.mesh.vertices,
self.mesh.faces[is_interface]);
self.boundary = pymesh.form_mesh(self.mesh.vertices,
self.mesh.faces[np.logical_not(is_interface)]);
#self.vertex_colors = new_vertex_colors[is_interface];
tmp_dir = tempfile.gettempdir();
m = hashlib.md5();
m.update(self.mesh.vertices);
name = m.hexdigest();
bd_mesh_file = os.path.join(tmp_dir, "{}_bd.msh".format(name));
interface_mesh_file = os.path.join(tmp_dir, "{}_interface.msh".format(name));
pymesh.save_mesh(bd_mesh_file, self.boundary);
pymesh.save_mesh(interface_mesh_file, self.interface);
self.subviews = [
MeshView.create_from_setting({
"type": "mesh_only",
"mesh": bd_mesh_file,
"color": exterior_color,
"wire_frame": True,
"bbox": [self.bmin, self.bmax]
}),
MeshView.create_from_setting({
"type": "mesh_only",
"mesh": interface_mesh_file,
"color": interior_color,
"wire_frame": True,
"bbox": [self.bmin, self.bmax]
}),
];
else:
centroids = np.mean(self.view.vertices[self.view.faces], axis=1);
self.V_to_keep = [should_keep(v) for v in centroids];
faces = self.view.faces[self.V_to_keep];
self.mesh = pymesh.form_mesh(self.view.vertices, faces);
self.mesh.add_attribute("face_normal");
def symmetrize(verts, faces, eps=1e-3):
"""
verts: N,3 (x,y,z) tensor
faces: F,3 (0,1,2) tensor
Modifies mesh to make it symmetric about y-z plane
- Cut mesh into half
- Copy left half into right half
- merge, remove duplicate vertices
"""
# Snap vertices close to centre to centre
verts_centre_mask = (verts[:, 0].abs() < eps)
verts[verts_centre_mask, 0] = 0
import pymesh
pmesh = pymesh.form_mesh(verts.numpy(), faces.numpy())
pymesh.save_mesh(f'csm_mesh/debug/1.obj', pmesh)
# Categorize vertices into left (-1), centre(0), right(1)
verts_side = torch.sign(verts[:, 0])
# Categorize faces into left (-1), centre(0), right(1)
face_verts_side = torch.index_select(verts_side, 0, faces.view(-1))
face_verts_side = face_verts_side.contiguous().view(faces.shape[0], 3)
face_left_mask = (face_verts_side[:, 0] == -1) & (
face_verts_side[:, 1] == -1) & (face_verts_side[:, 2] == -1)
face_right_mask = (face_verts_side[:, 0] == 1) & (
face_verts_side[:, 1] == 1) & (face_verts_side[:, 2] == 1)
face_intesects_yz = (~face_left_mask) & (~face_right_mask)
# Split intersecting faces
new_verts = []
new_faces = []
for f in face_intesects_yz.nonzero().squeeze(1):
i0, i1, i2 = faces[f]
if verts_side[i0] == verts_side[i1]:
i0, i1, i2 = i2, i0, i1
elif verts_side[i2] == verts_side[i1]:
i0, i1, i2 = i0, i1, i2
elif verts_side[i0] == verts_side[i2]:
i0, i1, i2 = i1, i0, i2
elif verts_side[i0] == -1:
i0, i1, i2 = i0, i1, i2
elif verts_side[i1] == -1:
i0, i1, i2 = i1, i0, i2
elif verts_side[i2] == -1:
i0, i1, i2 = i2, i0, i1
else:
import ipdb
ipdb.set_trace()
# yz axis intersects i0->i1 & i0->i2
assert (verts_side[i0] != verts_side[i1])
assert (verts_side[i0] != verts_side[i2])
v0 = verts[i0]
v1 = verts[i1]
v2 = verts[i2]
v_n1 = (v0 * v1[0] - v1 * v0[0]) / (v1[0] - v0[0])
v_n2 = (v0 * v2[0] - v2 * v0[0]) / (v2[0] - v0[0])
i_n1 = verts.shape[0] + len(new_verts)
i_n2 = verts.shape[0] + len(new_verts) + 1
new_verts.append(v_n1)
new_verts.append(v_n2)
new_faces.append((i0, i_n1, i_n2))
new_faces.append((i1, i_n1, i_n2))
new_faces.append((i1, i2, i_n2))
new_verts = torch.stack(new_verts, dim=0)
new_faces = torch.tensor(new_faces, dtype=faces.dtype, device=faces.device)
verts = torch.cat([verts, new_verts], dim=0)
faces = torch.index_select(faces, 0,
(~face_intesects_yz).nonzero().squeeze(1))
faces = torch.cat([faces, new_faces], dim=0)
import pymesh
pmesh = pymesh.form_mesh(verts.numpy(), faces.numpy())
pymesh.save_mesh(f'csm_mesh/debug/2.obj', pmesh)
# Merge vertices that are very close together
vertex_mapping = []
verts_new = []
for v_id in range(verts.shape[0]):
if v_id == 0:
vertex_mapping.append(0)
verts_new.append(verts[0])
continue
min_d, min_idx = (verts[0:v_id] - verts[v_id]).norm(dim=-1).min(dim=0)
if min_d < eps:
vertex_mapping.append(vertex_mapping[min_idx])
else:
vertex_mapping.append(len(verts_new))
verts_new.append(verts[v_id])
assert (len(vertex_mapping) == verts.shape[0])
vertex_mapping = torch.tensor(vertex_mapping,
dtype=faces.dtype,
device=faces.device)
verts = torch.stack(verts_new, dim=0)
faces = vertex_mapping[faces]
# Remove degenerate faces
faces_degenerate = (faces[:, 0] == faces[:, 1]) | (
faces[:, 0] == faces[:, 2]) | (faces[:, 2] == faces[:, 1])
faces = torch.index_select(faces, 0,
(~faces_degenerate).nonzero().squeeze(1))
import pymesh
pmesh = pymesh.form_mesh(verts.numpy(), faces.numpy())
pymesh.save_mesh(f'csm_mesh/debug/3.obj', pmesh)
# Delete faces that lie on right side (verts_side==1)
verts_centre_mask = (verts[:, 0].abs() < eps)
verts[verts_centre_mask, 0] = 0
verts_side = torch.sign(verts[:, 0])
face_verts_side = torch.index_select(verts_side, 0, faces.view(-1))
face_verts_side = face_verts_side.contiguous().view(faces.shape[0], 3)
face_right_mask = (face_verts_side[:, 0] == 1) | (
face_verts_side[:, 1] == 1) | (face_verts_side[:, 2] == 1)
faces = torch.index_select(faces, 0,
(~face_right_mask).nonzero().squeeze(1))
import pymesh
pmesh = pymesh.form_mesh(verts.numpy(), faces.numpy())
pymesh.save_mesh(f'csm_mesh/debug/4.obj', pmesh)
# Flip mesh, merge
faces_flip = faces + verts.shape[0]
faces = torch.cat([faces, faces_flip], dim=0)
verts_flip = verts * torch.tensor(
[-1, 1, 1], dtype=verts.dtype, device=verts.device)
vertex_mapping_flip = torch.arange(verts.shape[0],
dtype=faces.dtype,
device=faces.device)
vertex_mapping_flip[~verts_centre_mask] += verts.shape[0]
vertex_mapping = torch.arange(verts.shape[0],
dtype=faces.dtype,
device=faces.device)
vertex_mapping = torch.cat([vertex_mapping, vertex_mapping_flip], dim=0)
verts = torch.cat([verts, verts_flip], dim=0)
faces = vertex_mapping[faces]
import pymesh
pmesh = pymesh.form_mesh(verts.numpy(), faces.numpy())
pymesh.save_mesh(f'csm_mesh/debug/5.obj', pmesh)
pymesh.save_mesh(f'csm_mesh/debug/5.8.obj', pmesh)
numv = pmesh.num_vertices
while True:
pmesh, __ = pymesh.collapse_short_edges(pmesh, rel_threshold=0.4)
verts = torch.as_tensor(pmesh.vertices,
dtype=verts.dtype,
device=verts.device)
faces = torch.as_tensor(pmesh.faces,
dtype=faces.dtype,
device=faces.device)
verts_centre_mask = (verts[:, 0].abs() < 1e-3)
verts[verts_centre_mask, 0] = 0
pmesh = pymesh.form_mesh(verts.numpy(), faces.numpy())
pmesh, __ = pymesh.remove_isolated_vertices(pmesh)
pmesh, __ = pymesh.remove_duplicated_vertices(pmesh, tol=eps)
pmesh, __ = pymesh.remove_duplicated_faces(pmesh)
pmesh, __ = pymesh.remove_degenerated_triangles(pmesh)
pmesh, __ = pymesh.remove_isolated_vertices(pmesh)
# pmesh, __ = pymesh.remove_obtuse_triangles(pmesh, 120.0, 100)
pmesh, __ = pymesh.collapse_short_edges(pmesh, 1e-2)
pmesh, __ = pymesh.remove_duplicated_vertices(pmesh, tol=eps)
if pmesh.num_vertices == numv:
break
numv = pmesh.num_vertices
pymesh.save_mesh(f'csm_mesh/debug/5.9.obj', pmesh)
verts = torch.as_tensor(pmesh.vertices,
dtype=verts.dtype,
device=verts.device)
faces = torch.as_tensor(pmesh.faces,
dtype=faces.dtype,
device=faces.device)
# Remove unused vertices
vertices_used = torch.unique(faces.view(-1))
vertex_mapping = torch.zeros((verts.shape[0], ),
dtype=faces.dtype,
device=faces.device)
vertex_mapping[vertices_used] = torch.arange(vertices_used.shape[0],
dtype=faces.dtype,
device=faces.device)
faces = vertex_mapping[faces]
verts = verts[vertices_used]
import pymesh
pmesh = pymesh.form_mesh(verts.numpy(), faces.numpy())
pymesh.save_mesh(f'csm_mesh/debug/6.obj', pmesh)
return verts, faces
def insert(filename_in,
filename_out='out.obj',
data=32 * [0, 1],
secret=123456,
strength=100,
partitions=-1):
print
print '########## Embedding started ##########'
# Scramble the data
scrambled_data = scramble(data, secret)
mesh = pymesh.load_mesh(filename_in)
if partitions == -1:
partitions = mesh.num_vertices / 500
# Partition the mesh into patches
patches, mapping = partitioning.mesh_partitioning(filename_in, mesh,
partitions)
print 'Step 1: Mesh patched'
processed = 0
bits_inserted = 0
updated_vertices = []
# Set a progress bar
utils.progress(processed, len(patches), 'Inserting data in patches...')
# Insert the data in all the patches
for i, patch in enumerate(patches):
# Get the eigenVectors, either by computing them or by reading the from a file if they already have been computed
npy_file = 'saved_eig/' + str(partitions) + '/embedding_' + str(
i) + '.npy'
if os.path.exists(npy_file):
B = np.load(npy_file)
else:
B = compute_eigenvectors(patch.num_vertices, patch.faces)
np.save(npy_file, B)
# Get the spectral coefficients
P = np.matmul(B, patch.vertices[:, 0])
Q = np.matmul(B, patch.vertices[:, 1])
R = np.matmul(B, patch.vertices[:, 2])
# Insert the data
P, Q, R, count = embedding.write(P, Q, R, scrambled_data, strength)
BM1 = np.linalg.pinv(B)
new_vertices = np.zeros((patch.num_vertices, 3))
# Retrieve the new coordinates of the vertices
new_vertices[:, 0] = np.matmul(BM1, P)
new_vertices[:, 1] = np.matmul(BM1, Q)
new_vertices[:, 2] = np.matmul(BM1, R)
updated_vertices.append(pymesh.form_mesh(new_vertices, patch.faces))
bits_inserted += count
# Update the progress bar
processed += 1
utils.progress(processed, len(patches), 'Inserting data in patches...')
print
print 'Step 2: Data inserted'
if bits_inserted < len(data):
print 'Only %s bits inserted, the bit error rate when retriving data might be significant' % (
bits_inserted)
new_vertices = np.zeros((mesh.num_vertices, 3))
# Merge the different patches into a single mesh
for i in range(mesh.num_vertices):
for j in range(partitions):
val = mapping[j][i]
if val != -1:
new_vertices[i] = updated_vertices[j].vertices[int(val)]
continue
pymesh.save_mesh(filename_out, pymesh.form_mesh(new_vertices, mesh.faces))
print '########## Embedding finished ##########'
print
return bits_inserted
def automatic_marching_cube_reconstruction(dirpath, filename):
"""
An automatic routine to convert image stacks to 3D triangular meshes.
:param dirpath: The full directory path where the file(s) are stored,
ex : /home/user/Documents/spineReconstruction/Images/ or C:/Users/Documents/spineReconstruction/Images
:param filename: The name of the image stack file in tiff, ex : stackimage.tiff or stackimage.tif
:return:
"""
print(f'Computing : {filename.strip(".tif").split("/")[-1]}_mesh')
imageStack = io.imread(f'{dirpath}/{filename}')
zSpacing = 0.35 / 1.518
levelThreshold = 0
stability = True
mesh = construct_mesh_from_lewiner(imageStack, (zSpacing, 0.05, 0.05),
levelThreshold)
# Todo : refactoring and cut into more functions
while stability:
if levelThreshold > 200:
print(
'Image seems to be mostly noise, or resolution is super good. Stopping at levelTreshold 200'
)
stability = False
levelThreshold = 200
mesh2 = construct_mesh_from_lewiner(imageStack, (zSpacing, 0.05, 0.05),
levelThreshold)
meshList = optimise.get_size_of_meshes(optimise.create_graph(mesh2))
meshList.sort(reverse=True)
meshList = [x if x > 0.01 * np.sum(meshList) else 0 for x in meshList]
if len(meshList) > 1:
if (meshList[0] + meshList[1]) / np.sum(
meshList) > 0.9 and meshList[0] / np.sum(meshList) < 0.8:
stability = False
stability2 = False
# neck and head are dissociated
while not stability2:
levelThreshold -= 1
mesh2 = construct_mesh_from_lewiner(
imageStack, (zSpacing, 0.05, 0.05), levelThreshold)
meshL = optimise.remove_noise(mesh2)
if len(meshL) > 1:
if ((len(meshL[0].vertices) + len(meshL[1].vertices)) /
len(mesh2.vertices) <= 0.9
or len(meshL[0].vertices) / len(mesh2.vertices)
>= 0.8):
levelThreshold -= levelThreshold / 10
break
else:
levelThreshold -= levelThreshold / 10
break
else:
levelThreshold += 5
else:
levelThreshold += 5
# Look for narrow reconstruction
mesh3 = construct_and_optimise_from_lewiner(imageStack,
(zSpacing, 0.05, 0.05),
levelThreshold)
print(
f'Saving mesh with level threshold : {levelThreshold} in optimisedMeshes'
)
save_mesh(
f'optimisedMeshes/{filename.split(".")[0]}_{levelThreshold}_optimised.stl',
mesh3)
def sample_modelnet_40(input_dir, output_dir, point_cloud_size):
"""
Sample ModelNet40 meshes into point clouds of certain sizes (random sampling).
Args:
input_dir (str): Input dir of ModelNet40.
output_dir (str): Output dir with sampled point clouds.
point_cloud_size (int): Output size of sampling algorithm.
"""
# Is data present?
if not os.path.exists(input_dir):
raise AssertionError(
'No ModelNet40 dataset found in the following directory: ' +
input_dir)
#######################################################################
# load data
#######################################################################
train_clouds = []
train_labels = []
test_clouds = []
test_labels = []
clsnms = []
# Classes dir
class_names = [
el for el in os.listdir(input_dir)
if os.path.isdir(os.path.join(input_dir, el))
]
class_dirs = [os.path.join(input_dir, el) for el in class_names]
for idx, class_dir in enumerate(class_dirs):
# Class name
class_name = os.path.split(class_dir)[1]
clsnms.append(class_name)
# For train/test split
for part_name in ['train', 'test']:
# For each file in part
print('Converting', part_name, 'part of', class_name, 'class')
part_dir = os.path.join(class_dir, part_name)
for filename in tqdm(
[f for f in os.listdir(part_dir) if '.off' in f]):
# Load object
f = filename.split('.')
f_ply = str(f[0]) + '.ply'
f_pcd = str(f[0]) + '_' + str(point_cloud_size) + '_' + '.pcd'
object_path = os.path.join(os.path.join(part_dir, filename))
pymesh_path = os.path.join(os.path.join(part_dir, f_ply))
pclpcd_path = os.path.join(os.path.join(part_dir, f_pcd))
# No off
if not os.path.exists(object_path):
print('No OFF path at: ', object_path)
continue
try:
# OFF file fix
need_fix = False
with open(object_path) as f:
first_line = f.readline()
if 'OFF' in first_line and len(first_line) != 4:
need_fix = True
content = f.readlines()
if need_fix:
with open(object_path, 'w') as f:
f.write(first_line[:3] + '\n')
f.write(first_line[3:])
for c in content:
f.write(c)
# Pymesh
mesh = pymesh.load_mesh(object_path)
pymesh.save_mesh(pymesh_path, mesh)
# pyntcloud
pynt = pyntcloud.PyntCloud.from_file(pymesh_path)
cloud = pynt.get_sample('mesh_random', n=point_cloud_size)
cloud = cloud.values
# Zero mean
for dim in [0, 1, 2]:
dim_mean = np.mean(cloud[:, dim])
cloud[:, dim] -= dim_mean
# Scale to unit-ball
distances = [np.linalg.norm(point) for point in cloud]
scale = 1. / np.max(distances)
cloud *= scale
# PCD
pcd = pcl.PointCloud(cloud)
pcl.save(pcd, pclpcd_path)
# Append
if part_name == 'train':
train_clouds.append(cloud)
train_labels.append(idx)
else:
test_clouds.append(cloud)
test_labels.append(idx)
except ValueError:
print("An exception occurred: " + object_path)
return
# Numpy arr
train_clouds = np.array(train_clouds)
train_labels = np.array(train_labels)
test_clouds = np.array(test_clouds)
test_labels = np.array(test_labels)
clsnms = np.array(clsnms)
#######################################################################
# Flat pointclouds and shuffle
#######################################################################
train_shuffle_idx = np.arange(len(train_clouds))
np.random.shuffle(train_shuffle_idx)
train_clouds = train_clouds[train_shuffle_idx]
train_labels = train_labels[train_shuffle_idx]
test_shuffle_idx = np.arange(len(test_clouds))
np.random.shuffle(test_shuffle_idx)
test_clouds = test_clouds[test_shuffle_idx]
test_labels = test_labels[test_shuffle_idx]
#######################################################################
# Flat pointclouds and shuffle
#######################################################################
file_max_length = 2048
for file_idx in range(math.ceil(len(train_clouds) / file_max_length)):
filename = 'data_train_' + str(file_idx) + '.h5'
filepath = os.path.join(output_dir, filename)
file = h5py.File(filepath)
start_idx = file_max_length * file_idx
end_idx = min(len(train_clouds), file_max_length * (file_idx + 1))
file['data'] = train_clouds[start_idx:end_idx]
file['label'] = train_labels[start_idx:end_idx]
file.close()
for file_idx in range(math.ceil(len(test_clouds) / file_max_length)):
filename = 'data_test_' + str(file_idx) + '.h5'
filepath = os.path.join(output_dir, filename)
file = h5py.File(filepath)
start_idx = file_max_length * file_idx
end_idx = min(len(test_clouds), file_max_length * (file_idx + 1))
file['data'] = test_clouds[start_idx:end_idx]
file['label'] = test_labels[start_idx:end_idx]
file.close()
with open(os.path.join(output_dir, 'shape_names.txt'), 'w') as f:
for class_name in clsnms:
f.write(class_name + '\n')
def main():
args = parse_args();
mesh = pymesh.load_mesh(args.input_mesh);
add_attribute(mesh, args.attribute_name);
pymesh.save_mesh(args.output_mesh, mesh, args.attribute_name);
pymesh.timethis.summarize();
box_min = np.array ( [ -0.11, +0.10, -0.01 ] )
box_max = np.array ( [ -0.04, +0.17, +0.06 ] )
box = pymesh.generate_box_mesh ( box_min, box_max )
# In[36]:
bunny = pymesh.load_mesh ( "bunny.obj" )
# In[37]:
intersection = pymesh.boolean ( box, bunny, "intersection", "carve")
# In[38]:
pymesh.save_mesh("output.obj", intersection, ascii=True)
# In[39]:
mesh = gel.obj_load("output.obj")
js.display(mesh, smooth=False)
def main():
args = parse_args()
mesh = pymesh.load_mesh(args.input_mesh)
mesh = pymesh.submesh(mesh, args.face_indices, args.n_ring)
pymesh.save_mesh(args.output_mesh, mesh, *mesh.get_attribute_names())