Rhino C++ API  7.21
Public Member Functions | Public Attributes | Friends | List of all members
ON_PolyEdgeSegment Class Reference

#include <opennurbs_polyedgecurve.h>

Inheritance diagram for ON_PolyEdgeSegment:
ON_CurveProxy ON_Curve ON_Geometry ON_Object

Public Member Functions

 ON_PolyEdgeSegment ()
 construction More...
 
 ~ON_PolyEdgeSegment ()
 
const ON_BrepBrep () const
 
const ON_BrepEdgeBrepEdge () const
 
const ON_BrepFaceBrepFace () const
 
const ON_BrepTrimBrepTrim () const
 
bool Create (const ON_BrepTrim *trim, const ON_UUID &object_id)
 
bool Create (const ON_Curve *curve, const ON_UUID &object_id)
 
void DestroyRuntimeCache (bool bDelete=true) override
 default copy constructor and operator= are fine. More...
 
ON_CurveDuplicateCurve () const override
 virtual ON_Curve::DuplicateCurve override More...
 
ON_Interval EdgeDomain () const
 
double EdgeParameter (double t) const
 
bool IsClosed () const override
 virtual ON_Curve::IsClosed override More...
 
ON_Surface::ISO IsoType () const
 
bool Read (ON_BinaryArchive &) override
 
bool ReversedEdgeDir () const
 
bool ReversedTrimDir () const
 
void SetTrimDomainFromEdgeDomain ()
 
bool Split (double t, ON_Curve *&left_side, ON_Curve *&right_side) const
 override of virtual ON_Curve::Split More...
 
const ON_SurfaceSurface () const
 
ON_2dPoint SurfaceParameter (double t) const
 
bool Trim (const ON_Interval &domain)
 override of virtual ON_Curve::Trim More...
 
ON_Interval TrimDomain () const
 
double TrimParameter (double t) const
 
bool Write (ON_BinaryArchive &) const override
 
- Public Member Functions inherited from ON_CurveProxy
 ON_CurveProxy () ON_NOEXCEPT
 
 ON_CurveProxy (const ON_Curve *)
 
 ON_CurveProxy (const ON_Curve *, ON_Interval)
 
 ON_CurveProxy (const ON_CurveProxy &)
 
virtual ~ON_CurveProxy ()
 
ON__UINT32 DataCRC (ON__UINT32 current_remainder) const override
 virtual ON_Object::DataCRC override More...
 
int Degree () const override
 
int Dimension () const override
 ON_Geometry overrides. More...
 
ON_Interval Domain () const override
 ON_Curve overrides. More...
 
void Dump (ON_TextLog &) const override
 for debugging More...
 
bool Evaluate (double, int, int, double *, int=0, int *=0) const override
 Domain changes from [a,b] to [-b,-a]. More...
 
bool GetBBox (double *boxmin, double *boxmax, bool bGrowBox=false) const override
 virtual ON_Geometry GetBBox override
More...
 
bool GetClosestPoint (const ON_3dPoint &, double *, double=0.0, const ON_Interval *=nullptr) const override
 
bool GetCurveParameterFromNurbFormParameter (double, double *) const override
 virtual ON_Curve::GetCurveParameterFromNurbFormParameter override More...
 
bool GetLength (double *, double=1.0e-8, const ON_Interval *=nullptr) const override
 
bool GetLocalClosestPoint (const ON_3dPoint &, double, double *, const ON_Interval *=nullptr) const override
 
bool GetNextDiscontinuity (ON::continuity c, double t0, double t1, double *t, int *hint=nullptr, int *dtype=nullptr, double cos_angle_tolerance=ON_DEFAULT_ANGLE_TOLERANCE_COSINE, double curvature_tolerance=ON_SQRT_EPSILON) const override
 
bool GetNormalizedArcLengthPoint (double s, double *t, double fractional_tolerance=1.0e-8, const ON_Interval *sub_domain=nullptr) const override
 
bool GetNormalizedArcLengthPoints (int count, const double *s, double *t, double absolute_tolerance=0.0, double fractional_tolerance=1.0e-8, const ON_Interval *sub_domain=nullptr) const override
 
int GetNurbForm (ON_NurbsCurve &, double=0.0, const ON_Interval *=nullptr) const override
 
bool GetNurbFormParameterFromCurveParameter (double, double *) const override
 virtual ON_Curve::GetNurbFormParameterFromCurveParameter override More...
 
bool GetParameterTolerance (double, double *, double *) const override
 (optional - override if curve is piecewise smooth) More...
 
bool GetSpanVector (double *) const override
 
int HasNurbForm () const override
 
bool IsArc (const ON_Plane *=nullptr, ON_Arc *=nullptr, double=ON_ZERO_TOLERANCE) const override
 
bool IsContinuous (ON::continuity c, double t, int *hint=nullptr, double point_tolerance=ON_ZERO_TOLERANCE, double d1_tolerance=ON_ZERO_TOLERANCE, double d2_tolerance=ON_ZERO_TOLERANCE, double cos_angle_tolerance=ON_DEFAULT_ANGLE_TOLERANCE_COSINE, double curvature_tolerance=ON_SQRT_EPSILON) const override
 
bool IsInPlane (const ON_Plane &, double=ON_ZERO_TOLERANCE) const override
 
bool IsLinear (double=ON_ZERO_TOLERANCE) const override
 
bool IsPeriodic (void) const override
 periodic.) More...
 
bool IsPlanar (ON_Plane *=nullptr, double=ON_ZERO_TOLERANCE) const override
 
int IsPolyline (ON_SimpleArray< ON_3dPoint > *pline_points=nullptr, ON_SimpleArray< double > *pline_t=nullptr) const override
 virtual override of ON_Curve::IsPolyline More...
 
bool IsShort (double tolerance, const ON_Interval *sub_domain=0, double *length_estimate=0) const override
 
bool IsValid (class ON_TextLog *text_log=nullptr) const override
 ON_Object overrides. More...
 
ON_CurveProxyoperator= (const ON_CurveProxy &)
 
const ON_CurveProxyCurve () const
 
ON_Interval ProxyCurveDomain () const
 
bool ProxyCurveIsReversed () const
 
double RealCurveParameter (double t) const
 
bool Reverse () override
 
bool SetDomain (double t0, double t1) override
 
bool SetDomain (ON_Interval domain)
 
void SetProxyCurve (const ON_Curve *real_curve)
 
void SetProxyCurve (const ON_Curve *real_curve, ON_Interval real_curve_subdomain)
 
bool SetProxyCurveDomain (ON_Interval proxy_curve_subdomain)
 
unsigned int SizeOf () const override
 virtual ON_Object::SizeOf override More...
 
int SpanCount () const override
 number of smooth spans in curve More...
 
double ThisCurveParameter (double real_curve_parameter) const
 
bool Transform (const ON_Xform &) override
 
- Public Member Functions inherited from ON_Curve
 ON_Curve () ON_NOEXCEPT
 
 ON_Curve (const ON_Curve &)
 
virtual ~ON_Curve ()
 
bool AreaMassProperties (ON_3dPoint base_point, ON_3dVector plane_normal, ON_MassProperties &mp, bool bArea=true, bool bFirstMoments=true, bool bSecondMoments=true, bool bProductMoments=true, double rel_tol=1.0e-6, double abs_tol=1.0e-6) const
 
virtual bool ChangeClosedCurveSeam (double t)
 
bool ChangeClosedCurveSeam (double t, double min_dist)
 
virtual bool ChangeDimension (int desired_dimension)
 
virtual class ON_CurveTreeCreateCurveTree () const
 
ON_3dVector CurvatureAt (double t) const
 
const class ON_CurveTreeCurveTree () const
 
ON_3dVector DerivativeAt (double t) const
 
void DestroyCurveTree ()
 
bool Ev1Der (double t, ON_3dPoint &point, ON_3dVector &first_derivative, int side=0, int *hint=0) const
 
bool Ev2Der (double t, ON_3dPoint &point, ON_3dVector &first_derivative, ON_3dVector &second_derivative, int side=0, int *hint=0) const
 
bool EvaluatePoint (const class ON_ObjRef &objref, ON_3dPoint &P) const override
 virtual ON_Geometry override More...
 
bool EvCurvature (double t, ON_3dPoint &point, ON_3dVector &tangent, ON_3dVector &kappa, int side=0, int *hint=0) const
 
bool EvPoint (double t, ON_3dPoint &point, int side=0, int *hint=0) const
 
bool EvTangent (double t, ON_3dPoint &point, ON_3dVector &tangent, int side=0, int *hint=0) const
 
virtual bool Extend (const ON_Interval &domain)
 
bool FirstSpanIsLinear (double min_length, double tolerance) const
 
bool FirstSpanIsLinear (double min_length, double tolerance, ON_Line *span_line) const
 
bool FrameAt (double t, ON_Plane &plane) const
 
bool GetDomain (double *t0, double *t1) const
 curve interface More...
 
virtual bool GetSpanVectorIndex (double t, int side, int *span_vector_index, ON_Interval *span_domain) const
 
bool GetTightBoundingBox (class ON_BoundingBox &tight_bbox, bool bGrowBox=false, const class ON_Xform *xform=nullptr) const override
 virtual ON_Geometry GetTightBoundingBox override
More...
 
int IntersectCurve (const ON_Curve *curveB, ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, double overlap_tolerance=0.0, const ON_Interval *curveA_domain=0, const ON_Interval *curveB_domain=0) const
 
int IntersectPlane (ON_PlaneEquation plane_equation, ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, double overlap_tolerance=0.0, const ON_Interval *curve_domain=0) const
 
virtual int IntersectSelf (ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, const ON_Interval *curve_domain=0) const
 
int IntersectSurface (const ON_Surface *surfaceB, ON_SimpleArray< ON_X_EVENT > &x, double intersection_tolerance=0.0, double overlap_tolerance=0.0, const ON_Interval *curveA_domain=0, const ON_Interval *surfaceB_udomain=0, const ON_Interval *surfaceB_vdomain=0) const
 
bool IsArcAt (double t, const ON_Plane *plane=0, ON_Arc *arc=0, double tolerance=ON_ZERO_TOLERANCE, double *t0=0, double *t1=0) const
 
bool IsClosable (double tolerance, double min_abs_size=0.0, double min_rel_size=10.0) const
 
virtual bool IsEllipse (const ON_Plane *plane=nullptr, ON_Ellipse *ellipse=nullptr, double tolerance=ON_ZERO_TOLERANCE) const
 
bool LastSpanIsLinear (double min_length, double tolerance) const
 
bool LastSpanIsLinear (double min_length, double tolerance, ON_Line *span_line) const
 
bool LengthMassProperties (class ON_MassProperties &mp, bool bLength=true, bool bFirstMoments=true, bool bSecondMoments=true, bool bProductMoments=true, double rel_tol=1.0e-6, double abs_tol=1.0e-6) const
 
class ON_PolylineCurveMeshCurve (ON_MeshCurveParameters &mp, ON_PolylineCurve *polyline, bool bSkipFirstPoint, const ON_Interval *domain) const
 
ON_NurbsCurveNurbsCurve (ON_NurbsCurve *pNurbsCurve=nullptr, double tolerance=0.0, const ON_Interval *subdomain=nullptr) const
 
ON::object_type ObjectType () const override
 
ON_Curveoperator= (const ON_Curve &)
 
ON_3dPoint PointAt (double t) const
 
ON_3dPoint PointAtEnd () const
 
ON_3dPoint PointAtStart () const
 
virtual bool RemoveShortSegments (double tolerance, bool bRemoveShortSegments=true)
 
bool SetDomain (ON_Interval domain)
 
virtual bool SetEndPoint (ON_3dPoint end_point)
 
virtual bool SetStartPoint (ON_3dPoint start_point)
 
ON_3dVector TangentAt (double t) const
 
- Public Member Functions inherited from ON_Geometry
 ON_Geometry ()=default
 
 ON_Geometry (const ON_Geometry &)=default
 
 ~ON_Geometry ()=default
 
ON_BoundingBox BoundingBox () const
 
virtual class ON_BrepBrepForm (class ON_Brep *brep=nullptr) const
 
virtual void ClearBoundingBox ()
 
virtual ON_COMPONENT_INDEX ComponentIndex () const
 
bool GetBoundingBox (ON_3dPoint &bbox_min, ON_3dPoint &bbox_max, bool bGrowBox=false) const
 
bool GetBoundingBox (ON_BoundingBox &bbox, bool bGrowBox=false) const
 
virtual bool HasBrepForm () const
 
virtual bool IsDeformable () const
 
virtual bool IsMorphable () const
 
bool IsValid (class ON_TextLog *text_log=nullptr) const override
 
virtual bool MakeDeformable ()
 
virtual bool Morph (const class ON_SpaceMorph &morph)
 
ON_Geometryoperator= (const ON_Geometry &)=default
 
bool Rotate (double rotation_angle, const ON_3dVector &rotation_axis, const ON_3dPoint &rotation_center)
 
bool Rotate (double sin_angle, double cos_angle, const ON_3dVector &rotation_axis, const ON_3dPoint &rotation_center)
 
bool Scale (double scale_factor)
 
virtual bool SwapCoordinates (int i, int j)
 
bool Translate (const ON_3dVector &translation_vector)
 
- Public Member Functions inherited from ON_Object
 ON_Object () ON_NOEXCEPT
 
 ON_Object (const ON_Object &)
 
virtual ~ON_Object ()
 
virtual ON_AggregateComponentStatus AggregateComponentStatus () const
 
bool AttachUserData (class ON_UserData *pUserData)
 
unsigned int ClearAllComponentStates () const
 
virtual unsigned int ClearComponentStates (ON_COMPONENT_INDEX component_index, ON_ComponentStatus states_to_clear) const
 
virtual unsigned int ClearComponentStates (ON_ComponentStatus states_to_clear) const
 
void CopyUserData (const ON_Object &source_object)
 
unsigned int CopyUserData (const ON_Object &source_object, ON_UUID source_userdata_item_id, ON_Object::UserDataConflictResolution userdata_conflict_resolution)
 
virtual bool DeleteComponents (const ON_COMPONENT_INDEX *ci_list, size_t ci_count)
 
bool DetachUserData (class ON_UserData *pUserData)
 
void EmergencyDestroy ()
 
class ON_UserDataFirstUserData () const
 
virtual unsigned int GetComponentsWithSetStates (ON_ComponentStatus states_filter, bool bAllEqualStates, ON_SimpleArray< ON_COMPONENT_INDEX > &components) const
 
class ON_UserDataGetUserData (const ON_UUID &userdata_uuid) const
 
bool GetUserString (const wchar_t *key, ON_wString &string_value) const
 
int GetUserStringKeys (ON_ClassArray< ON_wString > &user_string_keys) const
 
int GetUserStrings (ON_ClassArray< ON_UserString > &user_strings) const
 
bool IsCorrupt (bool bRepair, bool bSilentError, class ON_TextLog *text_log) const
 
bool IsKindOf (const ON_ClassId *pClassId) const
 
virtual void MarkAggregateComponentStatusAsNotCurrent () const
 
virtual void MemoryRelocate ()
 
virtual ON_UUID ModelObjectId () const
 
void MoveUserData (ON_Object &source_object)
 
unsigned int MoveUserData (ON_Object &source_object, ON_UUID source_userdata_item_id, ON_Object::UserDataConflictResolution userdata_conflict_resolution, bool bDeleteAllSourceItems)
 
ON_Objectoperator= (const ON_Object &)
 
void PurgeUserData ()
 
virtual unsigned int SetComponentStates (ON_COMPONENT_INDEX component_index, ON_ComponentStatus states_to_set) const
 
virtual unsigned int SetComponentStatus (ON_COMPONENT_INDEX component_index, ON_ComponentStatus status_to_copy) const
 
bool SetUserString (const wchar_t *key, const wchar_t *string_value)
 
int SetUserStrings (int count, const ON_UserString *user_strings, bool bReplace)
 
bool ThisIsNullptr (bool bSilentError) const
 
void TransformUserData (const class ON_Xform &xform)
 
virtual bool UpdateReferencedComponents (const class ON_ComponentManifest &source_manifest, const class ON_ComponentManifest &destination_manifest, const class ON_ManifestMap &manifest_map)
 
int UserStringCount () const
 

Public Attributes

const ON_Brepm_brep
 
ON_COMPONENT_INDEX m_component_index
 
const ON_BrepEdgem_edge
 3d edge in m_brep More...
 
ON_Interval m_edge_domain = ON_Interval::EmptyInterval
 corresponding domain of the edge - see note below More...
 
const ON_BrepFacem_face
 
ON_UUID m_object_id
 m_object_id = id of a brep or curve object in Rhino More...
 
const void * m_parent_object
 Runtime helpers. More...
 
const ON_Surfacem_surface
 
const ON_BrepTrimm_trim
 2d trim in m_brep More...
 
ON_Interval m_trim_domain = ON_Interval::EmptyInterval
 corresponding domain of the trim - see note below More...
 

Friends

class ON_PolyEdgeCurve
 

Additional Inherited Members

- Public Types inherited from ON_Object
enum  UserDataConflictResolution : unsigned char {
  UserDataConflictResolution::destination_object = 0, UserDataConflictResolution::source_object = 1, UserDataConflictResolution::source_copycount_gt = 2, UserDataConflictResolution::source_copycount_ge = 3,
  UserDataConflictResolution::destination_copycount_gt = 4, UserDataConflictResolution::destination_copycount_ge = 5, UserDataConflictResolution::delete_item = 6
}
 
- Static Public Member Functions inherited from ON_Curve
static class ON_NurbsCurveCreateCubicLoft (int point_count, int point_dim, int point_stride, const double *point_list, double k, int is_closed=0, ON::cubic_loft_end_condition start_shape=ON::cubic_loft_ec_quadratic, ON::cubic_loft_end_condition end_shape=ON::cubic_loft_ec_quadratic, class ON_NurbsCurve *nurbs_curve=0)
 
- Static Public Attributes inherited from ON_Geometry
const static ON_Geometry Unset
 
- Protected Member Functions inherited from ON_CurveProxy
void SetProxyCurveIsReversed (bool bReversed)
 
- Protected Member Functions inherited from ON_Curve
bool ParameterSearch (double t, int &index, bool bEnableSnap, const ON_SimpleArray< double > &m_t, double RelTol=ON_SQRT_EPSILON) const
 

Constructor & Destructor Documentation

◆ ON_PolyEdgeSegment()

ON_PolyEdgeSegment::ON_PolyEdgeSegment ( )

construction

◆ ~ON_PolyEdgeSegment()

ON_PolyEdgeSegment::~ON_PolyEdgeSegment ( )

Member Function Documentation

◆ Brep()

const ON_Brep* ON_PolyEdgeSegment::Brep ( ) const

◆ BrepEdge()

const ON_BrepEdge* ON_PolyEdgeSegment::BrepEdge ( ) const

◆ BrepFace()

const ON_BrepFace* ON_PolyEdgeSegment::BrepFace ( ) const

◆ BrepTrim()

const ON_BrepTrim* ON_PolyEdgeSegment::BrepTrim ( ) const

◆ Create() [1/2]

bool ON_PolyEdgeSegment::Create ( const ON_BrepTrim trim,
const ON_UUID object_id 
)

Description: Creates a polyedge segment that uses the entire edge and has the same domain as the edge. Parameters: trim - [in] Returns: true if successful (edge was valid and trim_index was valid) Remarks: Use ON_Curve::SetDomain, ON_Curve::Trim, ON_Curve::Reverse, etc., to tweak the domain, support, direction etc.

◆ Create() [2/2]

bool ON_PolyEdgeSegment::Create ( const ON_Curve curve,
const ON_UUID object_id 
)

Description: Creates a polyedge segment that uses the entire curve and has the same domain as the curve. Parameters: curve - [in] Remarks: Use ON_Curve::SetDomain, ON_Curve::Trim, ON_Curve::Reverse, etc., to tweak the domain, support, direction etc.

◆ DestroyRuntimeCache()

void ON_PolyEdgeSegment::DestroyRuntimeCache ( bool  bDelete = true)
overridevirtual

default copy constructor and operator= are fine.

virtual ON_Object::DestroyRuntimeCache override

Reimplemented from ON_CurveProxy.

◆ DuplicateCurve()

ON_Curve* ON_PolyEdgeSegment::DuplicateCurve ( ) const
overridevirtual

virtual ON_Curve::DuplicateCurve override

Reimplemented from ON_CurveProxy.

◆ EdgeDomain()

ON_Interval ON_PolyEdgeSegment::EdgeDomain ( ) const

Returns: subdomain of the edge that this segment uses. This can be different than the domain returned by this->Domain().

◆ EdgeParameter()

double ON_PolyEdgeSegment::EdgeParameter ( double  t) const

◆ IsClosed()

bool ON_PolyEdgeSegment::IsClosed ( ) const
overridevirtual

virtual ON_Curve::IsClosed override

Reimplemented from ON_CurveProxy.

◆ IsoType()

ON_Surface::ISO ON_PolyEdgeSegment::IsoType ( ) const

◆ Read()

bool ON_PolyEdgeSegment::Read ( ON_BinaryArchive binary_archive)
overridevirtual

Description: Low level archive writing tool used by ON_BinaryArchive::ReadObject(). Parameters: binary_archive - archive to read from Returns: Returns true if the read is successful. Remarks: Use ON_BinaryArchive::ReadObject() to read objects. This Read() function should read the objects definition back into its data members.

The default implementation of this virtual function returns false and does nothing.

Reimplemented from ON_CurveProxy.

◆ ReversedEdgeDir()

bool ON_PolyEdgeSegment::ReversedEdgeDir ( ) const

Returns: True if this segment has an ON_BrepEdge and the direction of the ON_BrepEdge is the reverse of the direction of the segment.

◆ ReversedTrimDir()

bool ON_PolyEdgeSegment::ReversedTrimDir ( ) const

Returns: True if this segment has an ON_BrepTrim and the direction of the ON_BrepTrime is the reverse of the direction of the segment.

◆ SetTrimDomainFromEdgeDomain()

void ON_PolyEdgeSegment::SetTrimDomainFromEdgeDomain ( )

◆ Split()

bool ON_PolyEdgeSegment::Split ( double  t,
ON_Curve *&  left_side,
ON_Curve *&  right_side 
) const
virtual

override of virtual ON_Curve::Split

Reimplemented from ON_CurveProxy.

◆ Surface()

const ON_Surface* ON_PolyEdgeSegment::Surface ( ) const

◆ SurfaceParameter()

ON_2dPoint ON_PolyEdgeSegment::SurfaceParameter ( double  t) const

◆ Trim()

bool ON_PolyEdgeSegment::Trim ( const ON_Interval domain)
virtual

override of virtual ON_Curve::Trim

Reimplemented from ON_CurveProxy.

◆ TrimDomain()

ON_Interval ON_PolyEdgeSegment::TrimDomain ( ) const

Returns: subdomain of the trim that this segment uses. This can be different than the domain returned by this->Domain().

◆ TrimParameter()

double ON_PolyEdgeSegment::TrimParameter ( double  t) const

◆ Write()

bool ON_PolyEdgeSegment::Write ( ON_BinaryArchive binary_archive) const
overridevirtual

Description: Low level archive writing tool used by ON_BinaryArchive::WriteObject(). Parameters: binary_archive - archive to write to Returns: Returns true if the write is successful. Remarks: Use ON_BinaryArchive::WriteObject() to write objects. This Write() function should just write the specific definition of this object. It should not write and any chunk typecode or length information.

The default implementation of this virtual function returns false and does nothing.

Reimplemented from ON_CurveProxy.

Friends And Related Function Documentation

◆ ON_PolyEdgeCurve

friend class ON_PolyEdgeCurve
friend

Member Data Documentation

◆ m_brep

const ON_Brep* ON_PolyEdgeSegment::m_brep

◆ m_component_index

ON_COMPONENT_INDEX ON_PolyEdgeSegment::m_component_index

When the Rhino object is a brep, m_component_index refers to either an edge or a trim.

◆ m_edge

const ON_BrepEdge* ON_PolyEdgeSegment::m_edge

3d edge in m_brep

◆ m_edge_domain

ON_Interval ON_PolyEdgeSegment::m_edge_domain = ON_Interval::EmptyInterval

corresponding domain of the edge - see note below

◆ m_face

const ON_BrepFace* ON_PolyEdgeSegment::m_face

◆ m_object_id

ON_UUID ON_PolyEdgeSegment::m_object_id

m_object_id = id of a brep or curve object in Rhino

◆ m_parent_object

const void* ON_PolyEdgeSegment::m_parent_object

Runtime helpers.

When m_component_index refers to an ON_BrepTrim, there are four domains and 4 classes derived from ON_Curve that play a role in the polyedge segment. It is possible for all 4 of these domains to be different.

"this" ON_PolyEdgeSegment is an ON_ProxyCurve. The evaluation domain of "this" is = this->Domain() = ON_ProxyCurve::m_this_domain

ON_ProxyCurve::m_real_curve points to the curve in the c3 = ON_Brep::m_C3[edge.m_c3i]. "this" is a proxy for some sub-interval of c3. = this->ProxyCurveDomain() = ON_ProxyCurve::m_real_curve_domain

The edge, an ON_BrepEdge, is also a proxy based on c3, and the edge's evaluation domain is edge.m_this_domain.
ON_PolyEdgeSegment::m_edge_domain records the increasing subinterval of edge.m_this_domain that corresponds to the portion of c3 "this" is using.

The trim, an ON_BrepTrim, is a proxy based on a curve in ON_Brep::m_C2[]. Some portion of the trim corresponds to the portion of the edge we are using. m_trim_domain is an increasing, possible subinterval, of the trim's domain ON_BrepTrim::m_this_domain. CRhinoBrepObject or CRhinoCurveObject

◆ m_surface

const ON_Surface* ON_PolyEdgeSegment::m_surface

◆ m_trim

const ON_BrepTrim* ON_PolyEdgeSegment::m_trim

2d trim in m_brep

◆ m_trim_domain

ON_Interval ON_PolyEdgeSegment::m_trim_domain = ON_Interval::EmptyInterval

corresponding domain of the trim - see note below