GeometryHelper 12.3.0

• .NETStandard 2.0

  • No dependencies.

NEW IN 12.3.0

     NEW, reading DXF
     - DxfReader reads an ASCII DXF of R12 to R2018 into the library's shapes: Read(path), Read(stream) and
       Parse(text) give a DxfDocument of the Entities in file order, the Layers, the Units, the Version, what was
       Skipped by type and the Warnings. Lines, arcs, circles, ellipses, polylines with their bulges, splines,
       rays, xlines, points, 3D faces, solids and meshes are read, in 3D by default or, with
       DxfReadOptions.PlanAs2D, as the 2D shapes where they lie on the floor; ToMillimetres scales by INSUNITS.
     - Each DxfEntity keeps its Layer, Colour, TrueColour, Linetype, Lineweight, Thickness, Handle and, with
       KeepGroups, every group of it, extended data among them. DxfWriter.Add(DxfEntity) writes one back with
       its look, and a public constructor makes one in code.
     - Blocks and the INSERTs and MINSERTs that place them are read: each shape placed exactly by turns, even
       and uneven scalings and mirrors (a circle under an uneven scaling is the ellipse it becomes, an arc the
       exact spline), layer 0 and BYBLOCK taken from the INSERT, BlockPath and InsertHandles naming where it
       came from, DxfDocument.Blocks holding the blocks in their own coordinates. MaxPlacedEntities (2 000 000
       by default) bounds a file whose blocks multiply: 18 KB nesting 100 000 000 lines is read in 1.4 s.
     - Checked against ezdxf: every placed point within 1E-9 of where ezdxf puts it.

     NEW, shapes
     - GeoSpline2 and GeoSpline3, the NURBS curve in the plane and in space, with the five queries about every
       other shape from either side, transformations and flattening by a chord tolerance; written by DxfWriter
       as a SPLINE and by SvgWriter, and read from AutoCAD and IFC.
     - GeoXLine2 and GeoXLine3, the infinite line, and GeoSphere3, the solid ball, each with the queries of
       their dimension; the ball is written by ObjWriter, DxfWriter and Wkt as its triangles and read from IFC.
     - DxfWriter writes arcs and circles in space as an ARC and a CIRCLE in their own plane, not as chords;
       ObjWriter, SvgWriter and Wkt take the shapes they left out.

     FIXED, booleans and bodies
     - A union, a common part and a difference of two closed bodies give a body closed as Validate reads it,
       or say NotWorkedOut; welds keep faces on their planes; voids, chips and slabs thicker than the tolerance
       are cut; an opening the tolerance off a face is cut in closed; a beam less a bent bar no longer runs for
       minutes.
     - ConvexHull3 and ConvexHull2 hold every point within the tolerance; GeoObb3.Fit keeps the least box;
       Clash3.Find gives the same answer whichever part is listed first.

     FIXED, transformations and round shapes
     - Circles, arcs, edges, balls and rectangles moved by a map that is not a turn, shift or even scaling are
       refused where the moved shape would land off its true image by more than the point tolerance, and moved
       exactly where it would not; a plane is carried under even scalings of 1E5 and more.
     - Two circles within the point tolerance of each other everywhere are one circle; arcs a hair short of a
       whole turn, nearly flat arcs and edges with short chords are read and moved without throwing.

     FIXED, queries
     - Segments, rays, lines and chains against boxes, triangles, polygons and faces give a touch point where
       they touch alone, and no point where CollidesWith is false; arcs against them likewise.
     - Distances in the plane and in space are nought only where shapes truly meet, are exact near arcs, ellipse
       and face rims, and are the same whichever is asked first.
     - Curved offsets of loops that cross themselves or close slots give the right loops; point tests of loops
       of arcs answer right; flattening keeps the chord tolerance at any sweep.
     - ObjWriter, Wkt and DxfWriter print the same doubles on .NET Framework as on .NET.

     CHANGED
     - A union of two bodies lying face to face within the tolerance and apart, which came out open, now says
       NotWorkedOut; GeoObb3.IsDegenerate and Validate's NoVolume read against the point tolerance.
     - Arcs and edges moved by an equal-length skew are judged by where they land (InvalidOperationException
       when off); triangles with no area to the tolerance have no plane in their queries.
     - Rays and lines level over a flat shape get their crossing only within the vector tolerance; splines
       lying along each other are measured as they are in space.
     - Validate, IsClosed, SplitShells, hulls and face triangulation no longer slow with the square of their
       size; results of booleans and volumes move towards the exact ones, by up to the rounding.

     Nothing public is removed: a reflection diff against 12.2.0 finds 0 members removed and 1 959 added.

     Details in CHANGELOG.md.

     Earlier releases: https://github.com/nguyenthanguth/GeometryHelper/blob/main/CHANGELOG.md