Design3d

Changed
- direction vector of linesegments are now normalized

New Features

- straight line area for BsplineCurve2D
- split of circleby start end
- closedpolygon2d is_trigo
- Auto-adaptative camera/edge width babylonjs
- splitting of bsplinecurve2d
- BezierSurface3D implemented
- added rotation and translation for faces
- new classes BezierCurve2D and BezierCurve3D
- spherical surface
- (core): update plot_data method
- update plot_data methods in wires and edges
- step almost working for cylindrical, conical toroidal
- difference between intersections and crossings
- plot_data version set to 0.3.8 or above

Fixes

- support of mixed vector point in to step
- remove debug mode babylonjs
- remove sci notation in step export
- use stable cdn for babylonjs
- sweep extrusion length
- line circle intersection with tolerance, normal and dir vector for arc
- offset of wire
- remove useless non serializable attr
- secondmoment area from straight lines
- reversed faces in extrusion correction
- enhancement of rotation/translation of shells
- bug fix BezierCurve2D and 3D
- eq and hash for basis and frames
- shell and frame mapped shell correctly read
- small try except added for step reading
- all SHAPE_REPRESENTATION are now read
- Arc3D from step full debug
- arc3d to 2d in bspline3d surface
- missing faces at end of sweep
- splitting faces and arcs
- perf in display nodes and toroidal aspect
- setup.py requires plot_data>=0.3.9
- (primitives2d): serialization
- debug of shell method
- porting shells methods
- Debug of conical faces
- Porting cylinders and hollow
- porting from missing from_contour3d for planeface
- reading steps, but artefact on faces
- Correcting arc from_step

Performance improvements

- LineSegment2D.points is non serializable attribute
- ClosedPolygon2D.line_segment is non_serializable_attributes
- Optimization of mesh generation

Refactorings
- (edges): put data argument back into Arc2D.plot_data()
- (edges): redefined Arc2D.plot_data()

Changed
- debugs on frame 2D

Optimized
- babylon data generation speed up

Added
- translation and rotation for various primitives

Changed
- Frame3D rotation takes also into account origin
- following plot_data v0.5.3

Added
- handle spherical surfaces
- positionning of parts in STEP reading

Added
- step export

Changed
- modules -2D or *3D renamed in *2d, *3d
- point and vector declared with their x, y, z vm.Point2D((0, 0)) -> vm.Point2D(0, 0)
- separating in new modules: display, wires, edges...
- PEP8: method names
- PointAtCurvilinearAbscissa changed to point_at_abscissa
- MPLPlot changed to plot()
- plot now returns only ax instead of fig, ax