add humble-navigation2

2025-05-27 19:03:40 +08:00
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+# Nav2 Voxel Grid
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+The `nav2_voxel_grid` package contains the VoxelGrid used by the `Voxel Layer` inside of `nav2_costmap_2d`. The voxel grid itself is simply a 2D char pointer array of the map size with bit locations corresponding to voxel values (free, unknown, occupied , etc). 
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+It is branched out as a separate package for use in other applications where a dense voxel grid representation may be useful. It also contains implementations of 3D raycasting. 
+
+## ROS1 Comparison
+
+This package is a direct port to ROS2 for use in the voxel layer.