Boolean about truck

[ytanimura]

Current Status:
Now we are implementing Boolean operations for solids in the case where all interfering faces are transversely intersected. We already implemented:

• extraction of intersection polyline curves between two polygon meshes,
• the struct IntersectionCurve for describing intersection curve between two surfaces, (Each intersection curve is leaded by a polyline curve extracted the above function.) and
• creation of the loop wires (topological element) by collecting existing edges and new edges which consist the above intersection curves.

The picture below shows the polygons of the common part of the two parabolas, achieved by ad-hoc choosing the extracted loop wires.

Future tasks:

• selection of the loop wires included in an AND , OR or MINUS shape of two solids
• stabilization and acceleration of implementation. Now, it is unstable so that the unit tests fail 30% of the time and the constructed polygon have some holes. Moreover, they take very long time.
• Implementation for the case where some faces are in close contact with each other

[ytanimura]

The basic implementation has been completed, and the operation has become reasonably stable, although not yet at the enterprise level. ruststep has been released, so the set operations will be documented, and work on STEP I/O will be resumed first.

[ytanimura]

We will be announcing more details about the progress of the Boolean operations in this week. There are some performance issues, but so far the implementation is making steady progress.
There are no concrete plans for generating a mesh from point cloud at this time. We plan to develop the API for web applications once STEP I/O and set operations are in place.