Class TopoStl3Hfr

Namespace

Hi.Geom.Topo

Assembly

HiDisp.dll

Pure C# topological STL (triangle mesh) with Fraction<decimal> coordinates. Hfr: High-Precision (decimal) FRaction. Provides unlimited-precision exact arithmetic for geometric computations without relying on native (C++) interop. Corresponds to C++ topo_stl3_t.

public class TopoStl3Hfr : IDisplayee, IExpandToBox3d, IDisposable

Inheritance

object

TopoStl3Hfr

Implements

IDisplayee

IExpandToBox3d

IDisposable

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Extension Methods

DispUtil.Display(IDisplayee, Bind, Mat4d)

DuplicateUtil.TryDuplicate<TSelf>(TSelf, params object[])

InvokeUtil.SelfInvoke<TSrc>(TSrc, Action<TSrc>)

InvokeUtil.SelfInvoke<TSrc, TDst>(TSrc, Func<TSrc, TDst>)

ColorUtil.GetGloomyColor(object, double, double)

NameUtil.GetSelectionName(object)

StringUtil.GetPropertyStringIfToStringNotOverloaded(object, bool, bool)

LockUtil.Lock(object)

Constructors

TopoStl3Hfr(Stl, decimal)

Initializes a topological STL from an Stl model.

public TopoStl3Hfr(Stl stl, decimal fractionResolution)

Parameters

stl Stl

Source STL model.

fractionResolution decimal

Fraction approximation resolution (decimal).

TopoStl3Hfr(IReadOnlyList<Vec3Hfr[]>)

Initializes a topological STL from fraction-precision triangles (Vec3Hfr arrays). Each element is a 3-element array of Vec3Hfr representing triangle apexes. Corresponds to C++ constructor topo_stl3_t(Tri3fr_Iter, Tri3fr_Iter).

public TopoStl3Hfr(IReadOnlyList<Vec3Hfr[]> tris)

Parameters

tris IReadOnlyList<Vec3Hfr[]>

Source triangles as arrays of 3 Vec3Hfr.

TopoStl3Hfr(IReadOnlyList<Tri3d>, decimal)

Initializes a topological STL from double-precision triangles. Phase 1 (parallel): converts vertices to fraction coordinates via Stern-Brocot approximation. Phase 2 (sequential): builds topology (stocks, connectivity). Corresponds to C++ constructor topo_stl3_t(Tri3d_Iter, Tri3d_Iter, double).

public TopoStl3Hfr(IReadOnlyList<Tri3d> tris, decimal fractionResolution)

Parameters

tris IReadOnlyList<Tri3d>

Source triangles.

fractionResolution decimal

Fraction approximation resolution (decimal).

TopoStl3Hfr(int)

Initializes an empty topological STL with the specified triangle capacity.

public TopoStl3Hfr(int trisCap)

Parameters

trisCap int

Expected number of triangles (for pre-allocation).

Fields

TlStock

The line stock for this topological STL.

public readonly TopoLine3StockHfr TlStock

Field Value

TopoLine3StockHfr

TpStock

The point stock for this topological STL.

public readonly TopoPoint3StockHfr TpStock

Field Value

TopoPoint3StockHfr

TtStock

The triangle stock for this topological STL.

public readonly TopoTri3StockHfr TtStock

Field Value

TopoTri3StockHfr

Properties

Count

Gets the number of triangles.

public int Count { get; }

Property Value

int

FlatDisplayee

Gets the flat-shaded displayee for this topological STL. Created lazily on first access.

public TopoStl3HfrFlatDisplayee FlatDisplayee { get; }

Property Value

TopoStl3HfrFlatDisplayee

Methods

ClearDrawingsCache()

Invalidates all cached displayees. Call this after modifying the topology.

public void ClearDrawingsCache()

Display(Bind)

Displays the topological STL using flat shading. For smooth rendering, use TopoStl3HfrSmoothDisplayee.

public void Display(Bind bind)

Parameters

bind Bind

The rendering bind context.

Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

public void Dispose()

Dispose(bool)

Disposes the cached drawings.

protected virtual void Dispose(bool disposing)

Parameters

disposing bool

ExpandToBox3d(Box3d)

Expands the box to include all points.

public void ExpandToBox3d(Box3d dst)

Parameters

dst Box3d

IsSeamless()

Checks whether the mesh is seamless (all edges have a properly paired reversed line). A seamless mesh is a necessary condition for a manifold (closed, watertight) geometry. Corresponds to C++ is_seamless().

public bool IsSeamless()

Returns

bool

True if every directed edge has a reversed line with a triangle.

IsSeamless(List<TopoLine3Hfr>)

Checks whether the mesh is seamless. Defect lines are output to dstDefectLines. Corresponds to C++ is_seamless(vector<topo_line3_t*>&).

public bool IsSeamless(List<TopoLine3Hfr> dstDefectLines)

Parameters

dstDefectLines List<TopoLine3Hfr>

Output list for defect (non-seamless) lines.

Returns

bool

True if the mesh is fully seamless.

ToStl()

Converts to an Stl model.

public Stl ToStl()

Returns

Stl

ToString()

Returns a string that represents the current object.

public override string ToString()

Returns

string

A string that represents the current object.

ToTris()

Converts all triangles to a list of Tri3d (double precision). Corresponds to C++ to_tris().

public List<Tri3d> ToTris()

Returns

List<Tri3d>