Confusion about the result of tutorial PlanarSectioning

[lavender-lee]

When I run the tutorial named "PlanarSectioning", I got the following console log:

write OFF file: F:/mcut/build/tutorials/OUT_conncomp0.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp1.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp2.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp3.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp4.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp5.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp6.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp7.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp8.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp9.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp10.off
write OFF file: F:/mcut/build/tutorials/OUT_conncomp11.off

It generates 11 polygon models, why?

In addition, I would like to know the meaning of normal and sectionOffset . How to define the a cutting plane? Thanks!

const McDouble normal[] = {0, 1, 1}; // can point in any direction
const McDouble sectionOffset = 0.45;