[haritha-j]

Interesting, so you process the point cloud purely in 2D slices? do things like vertical piping cause any issues? or is 2D enough? I'm just finishing up a PhD in modelling industrial spaces from point clouds so I find this space fascinating.

[jgord]

imo, 2D is maybe 70% of the problem to solve. We build and we think about buildings in 2D, possibly because its simpler/cheaper, possibly because of gravity corraling us into spaces with flat levels.

Computationally 2D is simpler, less dof, also conceptually. I decided to bring the scope in to get some wins on the board and early revenue.

I did do a lot of prior work in pure 3D, detecting walls and pipes :

  https://youtu.be/-o58qe8egS4
  https://youtu.be/8fjHNDGKeu4

ans also have some demos of fitting textured triangles to make lite 3D web browser models .. a while before gaussian splats came on the scene.

You are quite right, pipes do bend and jump thru 3D in complicated ways - and so flat slices only pick up part of their journey.

My rationale is most people want an accurate floorplan first, and quickly, and this saves time and captures much of whats needed.

Obviously the same 2D technique can be used in sequence - floorplan first, then get a slice of a wall, and get vector lines for all the door and window openings, or the stairs using the same process [ pointcloud slab slice -> ortho xray image -> vectors -> CAD ]

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