Table of Contents

Interface IArcMotionDef

Namespace
Hi.NcParsers.Keywords
Assembly
HiMech.dll

Arc motion data written by CircularMotionSyntax. Stored under the MotionEvent JSON section alongside IMotionEventDef properties. The arc plane is read from the modal PlaneSelect section via GetPlaneNormalDir(JsonObject) rather than cached on the event — same source of truth as IsoG68RotationSyntax.

public interface IArcMotionDef
Extension Methods

Examples

"MotionEvent": {
  "Form": "McArc",
  "ArcCenter": { "X": 10.0, "Y": 5.0, "Z": 0.0 },
  "IsCcw": false,
  "AdditionalCircleNum": 0
}

Properties

AdditionalCircleNum

Number of additional full circles (for helix with L parameter).

int AdditionalCircleNum { get; }

Property Value

int

ArcCenter

Arc center in program coordinates (absolute).

object ArcCenter { get; }

Property Value

object

CenterSource

Where the center came from when it is NOT stated by this block's own words — a ArcCenterSource value (ModalCircleCenter: the modal klartext CC section; StartPoint: the arc's own start point, the missing- or partial-CC degrade). Absent for a block that states its center (I/J/K offsets, absolute I/J/K — see IsIjkAbsolute — or R). Read by the NcOpt splition write-back: a modal-center arc splits into fragments that keep the block's words (nothing to rebuild) around the unchanged CC line; a start-point center cannot be shared by fragments at all.

string CenterSource { get; }

Property Value

string

IsCcw

True for G03 (CCW), false for G02 (CW).

bool IsCcw { get; }

Property Value

bool

IsIjkAbsolute

True when the source block's I/J/K words addressed the center as absolute program coordinates (Heidenhain DIN/ISO, G90 in effect). Stamped only when true — absent means the ordinary start-to-center offsets. Read by the NcOpt splition write-back, which must emit the same absolute center on every fragment instead of per-fragment offsets.

bool IsIjkAbsolute { get; }

Property Value

bool