6 optional
double downsample_voxel_size_x = 1 [
default = 0.09];
7 optional
double downsample_voxel_size_y = 2 [
default = 0.09];
8 optional
double downsample_voxel_size_z = 3 [
default = 0.09];
9 optional
bool downsample_use_centroid = 4 [
default =
true];