common:
    lid_topic:  "/livox/lidar"
    imu_topic:  "/livox/imu"
    time_sync_en: false         # ONLY turn on when external time synchronization is really not possible
    
preprocess:
    lidar_type: 1              # 1 for Livox serials LiDAR, 2 for Velodyne LiDAR, 3 for ouster LiDAR, 
    scan_line:  6
    blind: 2                   #4m  point distance<blind   ignored

mapping:
    acc_cov: 0.1
    gyr_cov: 0.1
    b_acc_cov: 0.0001
    b_gyr_cov: 0.0001
    fov_degree:    100
    det_range:     260.0
    extrinsic_est_en:  true      # true: enable the online estimation of IMU-LiDAR extrinsic
    extrinsic_T: [ 0.05512, 0.02226, -0.0297 ]
    extrinsic_R: [ 1, 0, 0,
                   0, 1, 0,
                   0, 0, 1]

publish:
    path_en:  true
    scan_publish_en:  true       # false: close all the point cloud output
    dense_publish_en: true       # false: low down the points number in a global-frame point clouds scan.
    scan_bodyframe_pub_en: true  # true: output the point cloud scans in IMU-body-frame

pcd_save:
    pcd_save_en: true
    interval: -1                 # how many LiDAR frames saved in each pcd file; 
                                 # -1 : all frames will be saved in ONE pcd file, may lead to memory crash when having too much frames.





# voxel filter paprams
odometrySurfLeafSize: 0.1                     # default: 0.4 - outdoor, 0.2 - indoor
mappingCornerLeafSize: 0.1                   # default: 0.2 - outdoor, 0.1 - indoor
mappingSurfLeafSize: 0.4                     # default: 0.4 - outdoor, 0.2 - indoor

# robot motion constraint (in case you are using a 2D robot)
z_tollerance: 1                            # meters
rotation_tollerance: 1                     # radians

# CPU Params
numberOfCores: 4                              # number of cores for mapping optimization
mappingProcessInterval: 0.15                  # seconds, regulate mapping frequency

# Surrounding map
surroundingkeyframeAddingDistThreshold: 1.0   # meters, regulate keyframe adding threshold
surroundingkeyframeAddingAngleThreshold: 0.2  # radians, regulate keyframe adding threshold
surroundingKeyframeDensity: 2.0               # meters, downsample surrounding keyframe poses   
surroundingKeyframeSearchRadius: 50.0         # meters, within n meters scan-to-map optimization (when loop closure disabled)

# Loop closure
loopClosureEnableFlag: true                   # use loopclousre or not 
loopClosureFrequency: 4.0                     # Hz, regulate loop closure constraint add frequency
surroundingKeyframeSize: 50                   # submap size (when loop closure enabled)
historyKeyframeSearchRadius: 1.5             # meters, key frame that is within n meters from current pose will be considerd for loop closure
historyKeyframeSearchTimeDiff: 30.0           # seconds, key frame that is n seconds older will be considered for loop closure
historyKeyframeSearchNum: 20                  # number of hostory key frames will be fused into a submap for loop closure
historyKeyframeFitnessScore: 0.3              # icp threshold, the smaller the better alignment

# Visualization
globalMapVisualizationSearchRadius: 1000.0    # meters, global map visualization radius
globalMapVisualizationPoseDensity: 10      # meters, global map visualization keyframe density
globalMapVisualizationLeafSize: 1.0           # meters, global map visualization cloud density

# visual iktree_map  
visulize_IkdtreeMap: true

# visual iktree_map  
recontructKdTree: true

# Export settings
savePCD: true                         # https://github.com/TixiaoShan/LIO-SAM/issues/3
savePCDDirectory: "/Downloads/LOAM2/"        # in your home folder, starts and ends with "/". Warning: the code deletes "LOAM" folder then recreates it. See "mapOptimization" for implementation