A fair angle division has been achieved between pivot lines from (upper, left) to (lower, right)
About to sub-modularize utils.js
Utils module is now split into submodules approx, mat, matrix and misc
the line from pivotLine4_intersection to pivot_common is now found!!
cross lines generated for the full figure
something
is not an instance of THREE.Object3D
about to delete Plate geometry constructor
deleted Plate geometry constructor
deleted PlateSet, FixPointSet and GuidelineSet constructors