def visualize_gaussian_integration(ga: GaussianAccumulatorKDPy,
mesh: o3d.geometry.TriangleMesh,
ds=50,
min_samples=10000,
max_phi=100,
integrate_kwargs=dict()):
num_buckets = ga.num_buckets
to_integrate_normals = np.asarray(mesh.triangle_normals)
# remove normals on bottom half of sphere
to_integrate_normals, _ = filter_normals_by_phi(to_integrate_normals,
max_phi=180)
# determine optimal sampling
num_normals = to_integrate_normals.shape[0]
ds_normals = int(num_normals / ds)
to_sample = max(min([num_normals, min_samples]), ds_normals)
ds_step = int(num_normals / to_sample)
# perform sampling of normals
to_integrate_normals = to_integrate_normals[0:num_normals:ds_step, :]
mask = np.asarray(ga.mask)
query_size = to_integrate_normals.shape[0]
mask = np.ones((np.asarray(ga.mesh.triangles).shape[0], ), dtype=bool)
mask[num_buckets:] = False
class_name_str = type(ga).__name__
# integrate normals
if class_name_str in [
'GaussianAccumulatorKD', 'GaussianAccumulatorOpt',
'GaussianAccumulatorS2'
]:
to_integrate_normals = MatX3d(to_integrate_normals)
# mask = np.ma.make_mask(mask)
# triangles = np.asarray(ga.mesh.triangles)
t0 = time.perf_counter()
neighbors_idx = np.asarray(
ga.integrate(to_integrate_normals, **integrate_kwargs))
t1 = time.perf_counter()
elapsed_time = (t1 - t0) * 1000
print(
"{}; KD tree size: {}; Query Size (K): {}; Execution Time(ms): {:.1f}".
format(class_name_str, num_buckets, query_size, elapsed_time))
normalized_counts = np.asarray(ga.get_normalized_bucket_counts())
color_counts = get_colors(normalized_counts)[:, :3]
# print(normalized_counts)
refined_icosahedron_mesh = create_open_3d_mesh(
np.asarray(ga.mesh.triangles), np.asarray(ga.mesh.vertices))
# Colorize normal buckets
colored_icosahedron = assign_vertex_colors(refined_icosahedron_mesh,
color_counts, mask)
return colored_icosahedron, np.asarray(to_integrate_normals), neighbors_idx
def extract_chart(mesh, chart_idx=0):
triangles = np.asarray(mesh.triangles)
vertices = np.asarray(mesh.vertices)
num_triangles = triangles.shape[0]
chart_size = int(num_triangles / 5)
chart_start_idx = chart_idx * chart_size
chart_end_idx = chart_start_idx + chart_size
triangles_chart = triangles[chart_start_idx:chart_end_idx, :]
chart_mesh = create_open_3d_mesh(triangles_chart, vertices)
chart_mesh.vertex_colors = mesh.vertex_colors
return chart_mesh, chart_start_idx, chart_end_idx
def integrate_normals_and_visualize(to_integrate_normals, ga):
to_integrate_normals_mat = MatX3d(to_integrate_normals)
t0 = time.perf_counter()
neighbors_idx = np.asarray(ga.integrate(to_integrate_normals_mat))
t1 = time.perf_counter()
elapsed_time = (t1 - t0) * 1000
normalized_counts = np.asarray(ga.get_normalized_bucket_counts())
color_counts = get_colors(normalized_counts)[:, :3]
refined_icosahedron_mesh = create_open_3d_mesh(
np.asarray(ga.mesh.triangles), np.asarray(ga.mesh.vertices))
# Colorize normal buckets
colored_icosahedron = assign_vertex_colors(refined_icosahedron_mesh,
color_counts, None)
return colored_icosahedron
def main():
kwargs_base = dict(level=4, max_phi=180)
kwargs_s2 = dict(**kwargs_base)
ga_cpp_s2 = GaussianAccumulatorS2(**kwargs_s2)
normals_sorted_cube_hilbert = np.asarray(ga_cpp_s2.get_bucket_normals())
refined_icosahedron_mesh = create_open_3d_mesh(
np.asarray(ga_cpp_s2.mesh.triangles),
np.asarray(ga_cpp_s2.mesh.vertices))
indices = np.asarray(ga_cpp_s2.get_bucket_sfc_values())
colors = indices / np.iinfo(indices.dtype).max
colors = cm.viridis(colors)[:, :3]
lm = LineMesh(normals_sorted_cube_hilbert * 1.01,
colors=colors,
radius=0.004)
# colored_icosahedron = assign_vertex_colors(refined_icosahedron_mesh, colors)
# plot_meshes([refined_icosahedron_mesh, create_line_set(normals_sorted_cube_hilbert * 1.01)])
ls = o3d.geometry.LineSet.create_from_triangle_mesh(
refined_icosahedron_mesh)
refined_icosahedron_mesh.paint_uniform_color([0.5, 0.5, 0.5])
plot_meshes([refined_icosahedron_mesh, ls, *lm.cylinder_segments])
def decompose(ico):
triangles = np.asarray(ico.triangles)
vertices = np.asarray(ico.vertices)
ico_o3d = create_open_3d_mesh(triangles, vertices)
return triangles, vertices, ico_o3d