[WIP] Continuing work on refactoring and improving moves.

www/js/interpreter.ts

@@ -219,24 +219,44 @@ function danceAsLowLevelMoves(moves: Move[], startingVariants: AllVariantsForMov
   }
 }
 
+function improperShortWaves(slideTo: Hand) {
+  return new Map<DancerIdentity, SemanticPosition>([...handsFourImproper.entries()].map(
+    ([id, pos]) => ([id, {
+      kind: PositionKind.ShortLines,
+      which: pos.which.toShortLines(slideTo),
+      facing: pos.which.facingUpOrDown(),
+    }])
+  ));
+}
+
+function improperUnfoldToShortLines(center: CircleSide.Bottom | CircleSide.Top) {
+  return new Map<DancerIdentity, SemanticPosition>([...handsFourImproper.entries()].map(
+    ([id, pos]) => ([id, {
+      kind: PositionKind.ShortLines,
+      which: pos.which.unfoldToShortLines(center),
+      facing: center === CircleSide.Top ? Facing.Down : Facing.Up,
+    }])
+  ));
+}
+
+function improperLongWaves(facingOut: DanceRole) {
+  return new Map<DancerIdentity, SemanticPosition>([...handsFourImproper.entries()].map(
+    ([id, pos]) => ([id, {
+      ...pos,
+      facing: id.danceRole === facingOut ? pos.which.facingOut() : pos.which.facingAcross(),
+      hands: handsInLine({ wavy: true, which: pos.which, facing: undefined })
+    }])
+  ));
+}
+
 function StartingPosForFormation(formation: common.StartFormation, dance?: ContraDBDance): Map<DancerIdentity, SemanticPosition> {
   const preamble = dance?.preamble ?? "";
   if (preamble.includes("Starts in short waves, right hands to neighbors")) {
-    return new Map<DancerIdentity, SemanticPosition>([...handsFourImproper.entries()].map(
+    return improperShortWaves(Hand.Left);
-      ([id, pos]) => ([id, {
-        kind: PositionKind.ShortLines,
-        which: pos.which.toShortLines(Hand.Left),
-        facing: pos.which.isTop() ? Facing.Down : Facing.Up,
-      }])
-    ));
   } else if (preamble.includes("face down the hall in lines of 4, 1s splitting the 2s")) {
-    return new Map<DancerIdentity, SemanticPosition>([...handsFourImproper.entries()].map(
+    return improperUnfoldToShortLines(CircleSide.Top);
-      ([id, pos]) => ([id, {
+  } else if (preamble.includes("Long waves, larks face out")) {
-        kind: PositionKind.ShortLines,
+    return improperLongWaves(DanceRole.Lark);
-        which: pos.which.unfoldToShortLines(CircleSide.Top),
-        facing: Facing.Down,
-      }])
-    ));
   }
   
   switch (formation) {
@@ -284,12 +304,24 @@ function StartingPosForFormation(formation: common.StartFormation, dance?: Contr
 }
 
 function startingVariantsForFormation(formation: common.StartFormation, dance?: ContraDBDance) : AllVariantsForMoveArgs {
-  // TODO Handle various different starting position that all count as "improper" like short/long waves, etc.
+  const defaultFormation = StartingPosForFormation(formation, dance);
-  const pos = StartingPosForFormation(formation, dance);
+  if (formation !== "improper" || defaultFormation !== handsFourImproper) {
+    return new Map<string, MoveAsLowLevelMovesArgs>([
+      ["Initial", { startingPos: defaultFormation }]
+    ]);
+  } else {
+    // Handle various different starting position that all count as "improper" like short/long waves, etc.
+    return new Map<string, MoveAsLowLevelMovesArgs>([
+      ["InitialCircle", { startingPos: handsFourImproper }],
+      ["InitialShortWavesLeft", { startingPos: improperShortWaves(Hand.Left) }],
+      ["InitialShortWavesRight", { startingPos: improperShortWaves(Hand.Right) }],
+      ["InitialShortLinesDown", { startingPos: improperUnfoldToShortLines(CircleSide.Top) }],
+      ["InitialShortLinesUp", { startingPos: improperUnfoldToShortLines(CircleSide.Bottom) }],
+      ["InitialLongWavesLarksOut", { startingPos: improperLongWaves(DanceRole.Lark) }],
+      ["InitialLongWavesRobinsOut", { startingPos: improperLongWaves(DanceRole.Robin) }],
+    ]);
 
-  return new Map<string, MoveAsLowLevelMovesArgs>([
+  }
-    ["Initial", { startingPos: pos }]
-  ]);
 }
 
 export let mappedDance: Move[];

www/js/interpreterCommon.ts

@@ -343,13 +343,25 @@ export class ShortLinesPosition {
   }
 
   public shift(dir: Hand, facing: Facing.Up | Facing.Down): ShortLinesPosition {
-    const shift = (dir === Hand.Left) === (facing === Facing.Down) ? -1 : +1;
+    const { newPos, wrap } = this.shiftWithWrap(dir, facing);
-    const newNum = ShortLinesPosition.enumValueToNumber(this.enumValue) + shift;
+    if (wrap) {
-    if (newNum < 0 || newNum > 3) {
       throw new Error("Invalid shift: " + this + " facing " + facing + " to " + dir + ".");
     }
     
-    return ShortLinesPosition.get(ShortLinesPosition.numberToEnumValue(newNum));
+    return newPos;
+  }
+
+  public shiftWithWrap(dir: Hand, facing: Facing.Up | Facing.Down): { newPos: ShortLinesPosition, wrap?: -1 | 1 } {
+    const shift = (dir === Hand.Left) === (facing === Facing.Down) ? -1 : +1;
+    const newNum = ShortLinesPosition.enumValueToNumber(this.enumValue) + shift;
+    const newPos = ShortLinesPosition.get(ShortLinesPosition.numberToEnumValue(newNum))
+    if (newNum < 0) {
+      return { newPos, wrap: -1 };
+    } else if (newNum > 3) {
+      return { newPos, wrap: +1 };
+    } else {
+      return { newPos };
+    }
   }
 
   public isMiddle() : boolean {
@@ -540,24 +552,27 @@ export const handsFourImproper: Map<DancerIdentity, SemanticPosition & { kind: P
   }],
 ]);
 
-export function handsInShortLine({ which, facing, wavy }: { which: ShortLinesPosition; facing: Facing.Up | Facing.Down; wavy: boolean; }): Map<Hand, HandConnection> {
+export function handsInLongLines(wavy: boolean) {
-  return which.isMiddle() ? new Map<Hand, HandConnection>([
+  return new Map<Hand, HandConnection>([
     [Hand.Left, { hand: wavy ? Hand.Right : Hand.Left, to: HandTo.DancerLeft }],
     [Hand.Right, { hand: wavy ? Hand.Left : Hand.Right, to: HandTo.DancerRight }],
-  ]) : new Map<Hand, HandConnection>([
-    which.isLeft() === (facing === Facing.Up)
-      ? [Hand.Left, { hand: wavy ? Hand.Right : Hand.Left, to: HandTo.DancerLeft }]
-      : [Hand.Right, { hand: wavy ? Hand.Left : Hand.Right, to: HandTo.DancerRight }]
   ]);
 }
+
+export function handsInShortLine({ which, facing, wavy }: { which: ShortLinesPosition; facing: Facing.Up | Facing.Down; wavy: boolean; }): Map<Hand, HandConnection> {
+  return which.isMiddle()
+    ? handsInLongLines(wavy)
+    : new Map<Hand, HandConnection>([
+      which.isLeft() === (facing === Facing.Up)
+        ? [Hand.Left, { hand: wavy ? Hand.Right : Hand.Left, to: HandTo.DancerLeft }]
+        : [Hand.Right, { hand: wavy ? Hand.Left : Hand.Right, to: HandTo.DancerRight }]
+    ]);
+}
 export function handsInLine(args: { wavy: boolean, which: ShortLinesPosition | CirclePosition, facing?: Facing }) {
   if (args.which instanceof ShortLinesPosition && (args.facing === Facing.Up || args.facing === Facing.Down)) {
     return handsInShortLine({ wavy: args.wavy, which: args.which, facing: args.facing });
   } else {
-    return new Map<Hand, HandConnection>([
+    return handsInLongLines(args.wavy);
-      [Hand.Left, { hand: args.wavy ? Hand.Right : Hand.Left, to: HandTo.DancerLeft }],
-      [Hand.Right, { hand: args.wavy ? Hand.Left : Hand.Right, to: HandTo.DancerRight }],
-    ]);
   }
 }
 export function handToDancerToSideInCircleFacingAcross(which: CirclePosition): Map<Hand, HandConnection> {

www/js/libfigureMapper.ts

@@ -34,7 +34,7 @@ type chooser_slice_return = "straight" | "diagonal" | "none";
 type chooser_all_or_center_or_outsides = "all" | "center" | "outsides";
 type chooser_down_the_hall_ender = "turn-alone" | "turn-couple" | "circle" | "cozy" | "cloverleaf" | "thread-needle" | "right-high" | "sliding-doors" | "";
 type chooser_zig_zag_ender = "" | "ring" | "allemande";
-type chooser_hey_length = "full" | "half" | "less than half" | "between half and full";
+type chooser_hey_length = "full" | "half" | "less than half" | "between half and full" | { dancer: chooser_pairz, time: 1 | 2};
 type chooser_swing_prefix = "none" | "balance" | "meltdown";
 type chooser_dancers = "everyone" | "gentlespoon" | "gentlespoons" | "ladle" | "ladles" | "partners" | "neighbors" | "ones" | "twos" | "same roles" | "first corners" | "second corners" | "first gentlespoon" | "first ladle" | "second gentlespoon" | "second ladle" | "shadows";
 type chooser_pair = "gentlespoons" | "ladles" | "ones" | "twos" | "first corners" | "second corners";
@@ -410,7 +410,20 @@ export function nameLibFigureParameters(move: LibFigureMove): Move {
     .map((v, i, a) => a.indexOf(v) === i && a.lastIndexOf(v) === i ? v : v + (a.slice(0, i).filter(el => el === v).length + 1));
   const parameters = {};
   for (let i = 0; i < parameterNames.length; i++) {
-    parameters[parameterNames[i]] = move.parameter_values[i];
+    if (parameterNames[i] === "until") {
+      // parse chooser_hey_length
+      const hey_length: string = move.parameter_values[i];
+      if (hey_length.includes('%%')) {
+        parameters[parameterNames[i]] = {
+          dancer: hey_length.slice(0, -3),
+          time: parseInt(hey_length.at(-1)!),
+        };
+      } else {
+        parameters[parameterNames[i]] = hey_length;
+      }
+    } else {
+      parameters[parameterNames[i]] = move.parameter_values[i];
+    }
   }
   const beats: number = parameters["beats"];
   parameters["beats"] = undefined;

www/js/moves/_moveInterpreter.ts

@@ -395,6 +395,15 @@ export abstract class MoveInterpreter<N extends MoveName> {
     }
 
     if (res.size === 0) throw error;
+    else if (res.size > 1) {
+      // TODO Try to reduce variants if possible.
+      // XXX TODO Simple hack: perfer starting improper in a circle.
+      if ([...res.values()].find(v => v.previousMoveVariant === "InitialCircle")) {
+        for (const key of [...res.entries()].filter(([k, v]) => v.previousMoveVariant !== "InitialCircle").map(([k, v]) => k)) {
+          res.delete(key);
+        }
+      }
+    }
     return res;
   }
 }

www/js/moves/allemande.ts

@@ -1,7 +1,7 @@
 import { SemanticPosition, PositionKind, CircleSide, Facing, CirclePosition, LongLines, HandConnection, DancerDistance } from "../interpreterCommon.js";
 import { SemanticAnimationKind } from "../lowLevelMove.js";
 import { Hand } from "../rendererConstants.js";
-import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, moveInterpreters } from "./_moveInterpreter.js";
+import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, MoveInterpreterCtorArgs, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, moveInterpreters } from "./_moveInterpreter.js";
 
 type allemandeMoves = "allemande" | "allemande orbit" | "gyre";
 
@@ -10,20 +10,18 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
     // Need to store this locally so checking move.move restricts move.parameters.
     const move = this.move;
 
-    const allemandeCircling = move.move === "allemande orbit" ? move.parameters.circling1 : move.parameters.circling;
+    for (const [id, pos] of this.startingPos.entries()) {
-    const byHandOrShoulder = (move.move === "gyre" ? move.parameters.shoulder : move.parameters.hand) ? Hand.Right : Hand.Left;
+      if (this.findPairOpposite(this.move.parameters.who, id) === null) {
-
+        if (pos.dancerDistance && pos.dancerDistance !== DancerDistance.Normal) {
-    // TODO Not sure if this is right.
+          throw new Error("Dancers not involved in allemande must start at normal dancer distance.");
-    const swap = allemandeCircling % 360 === 180;
+        }
-    const returnToStart = allemandeCircling % 360 === 0;
+        if (pos.longLines) {
-    const intoWave = !swap && !returnToStart && allemandeCircling % 90 == 0;
+          throw new Error("Dancers not involved in allemande must start not in long lines.");
-    const intoWavePositions = !intoWave ? 0 : (allemandeCircling % 360 === 90) === (byHandOrShoulder === Hand.Left) ? 1 : -1;
+        }
-    if (!swap && !returnToStart && !intoWave) {
+      }
-      // TODO Support allemande that's not a swap or no-op.
-      throw "Unsupported allemande circle amount: " + allemandeCircling;
     }
 
-    return this.handlePairedMove(move.parameters.who, ({ startPos, around, withId, withPos }) => {
+    return this.handlePairedMove(this.move.parameters.who, ({ startPos, around, withId, withPos }) => {
       if (startPos.kind === PositionKind.ShortLines && withPos.kind === PositionKind.ShortLines
           && startPos.which.leftRightSide() != withPos.which.leftRightSide()
           && (!startPos.which.isMiddle() || !withPos.which.isMiddle())) {
@@ -32,16 +30,16 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
 
       let endPosition: SemanticPosition = {...startPos, dancerDistance: undefined, longLines: undefined, balance: undefined };
       let startingPos = {...startPos };
-      if (swap) {
+      if (this.moveInterpreter.swap) {
         // TODO This was more complicated. Is this wrong?
         endPosition = {...withPos, dancerDistance: undefined, longLines: undefined, balance: undefined };
-      } else if (intoWave) {
+      } else if (this.moveInterpreter.intoWave) {
         if (startPos.kind === PositionKind.ShortLines) {
           if (around === CircleSide.Left || around === CircleSide.Right) {
             // Fix startPos if necessary. Needed because pass through always swaps but sometimes shouldn't.
             let startWhich = startPos.which;
             if ((startPos.facing === Facing.Up || startPos.facing === Facing.Down) &&
-              ((byHandOrShoulder === Hand.Right)
+              ((this.moveInterpreter.byHandOrShoulder === Hand.Right)
                 !== (startPos.facing === Facing.Up)
                 !== startPos.which.isLeftOfSide())) {
               startWhich = startPos.which.swapOnSide()
@@ -53,14 +51,14 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
 
             const endWhich = CirclePosition.fromSides(startingPos.which.leftRightSide(),
               startWhich.isLeftOfSide()
-                !== (byHandOrShoulder === Hand.Right)
+                !== (this.moveInterpreter.byHandOrShoulder === Hand.Right)
-                !== (intoWavePositions === 1)
+                !== (this.moveInterpreter.intoWavePositions === 1)
                 ? CircleSide.Top
                 : CircleSide.Bottom);
             endPosition = {
               kind: PositionKind.Circle,
               which: endWhich,
-              facing: (startingPos.facing === Facing.Up) === (intoWavePositions === 1)
+              facing: (startingPos.facing === Facing.Up) === (this.moveInterpreter.intoWavePositions === 1)
                 ? endWhich.facingAcross()
                 : endWhich.facingOut(),
               setOffset: startingPos.setOffset,
@@ -72,7 +70,7 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
         } else {
           if (around === "Center") {
             const startCenter = startPos.longLines === LongLines.Center;
-            const endWhich = startPos.which.circleRight(intoWavePositions);
+            const endWhich = startPos.which.circleRight(this.moveInterpreter.intoWavePositions);
             endPosition = {
               kind: PositionKind.Circle,
               which: endWhich,
@@ -82,11 +80,11 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
               lineOffset: startPos.lineOffset,
             }
           } else {
-            const endWhich = startPos.which.toShortLines(intoWavePositions === 1 ? Hand.Right : Hand.Left);
+            const endWhich = startPos.which.toShortLines(this.moveInterpreter.intoWavePositions === 1 ? Hand.Right : Hand.Left);
             endPosition = {
               kind: PositionKind.ShortLines,
               which: endWhich,
-              facing: endWhich.isLeftOfSide() === (byHandOrShoulder === Hand.Left) ? Facing.Up : Facing.Down,
+              facing: endWhich.isLeftOfSide() === (this.moveInterpreter.byHandOrShoulder === Hand.Left) ? Facing.Up : Facing.Down,
               setOffset: startPos.setOffset,
               lineOffset: startPos.lineOffset,
             }
@@ -96,30 +94,23 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
 
       return this.combine([
         {
-          beats: move.beats,
+          beats: this.move.beats,
           endPosition,
           movementPattern: {
             kind: SemanticAnimationKind.RotateAround,
-            minAmount: byHandOrShoulder === Hand.Right ? allemandeCircling : -allemandeCircling,
+            minAmount: this.moveInterpreter.byHandOrShoulder === Hand.Right ? this.moveInterpreter.allemandeCircling : -this.moveInterpreter.allemandeCircling,
             around,
-            byHand: move.move === "allemande" || move.move === "allemande orbit" ? byHandOrShoulder : undefined,
+            byHand: move.move === "allemande" || move.move === "allemande orbit" ? this.moveInterpreter.byHandOrShoulder : undefined,
             close: true,
           },
         },
       ], {
         ...startingPos,
         hands: startPos.hands && move.move !== "gyre"
-          ? new Map<Hand, HandConnection>([...startPos.hands.entries()].filter(([h, c]) => h === byHandOrShoulder))
+          ? new Map<Hand, HandConnection>([...startPos.hands.entries()].filter(([h, c]) => h === this.moveInterpreter.byHandOrShoulder))
           : undefined
       });
     }, move.move !== "allemande orbit" ? undefined : ({ id, startPos }) => {
-      const orbitAmount = move.parameters.circling2;
-      const swap = orbitAmount % 360 === 180;
-      if (!swap && orbitAmount % 360 !== 0) {
-        // TODO Support allemande that's not a swap or no-op.
-        throw "Unsupported allemande orbit amount: " + orbitAmount;
-      }
-
       const startingPos: SemanticPosition = {
         ...startPos,
         hands: undefined,
@@ -127,7 +118,7 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
         dancerDistance: undefined,
       }
       let endPosition: SemanticPosition;
-      if (swap) {
+      if (this.moveInterpreter.orbitSwap) {
         if (startingPos.kind === PositionKind.Circle) {
           endPosition =
           {
@@ -154,7 +145,7 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
           movementPattern: {
             kind: SemanticAnimationKind.RotateAround,
             // Orbit is opposite direction of allemande.
-            minAmount: byHandOrShoulder === Hand.Right ? -orbitAmount : +orbitAmount,
+            minAmount: this.moveInterpreter.byHandOrShoulder === Hand.Right ? -this.moveInterpreter.orbitCircling : +this.moveInterpreter.orbitCircling,
             around: "Center",
             byHand: undefined,
             close: false,
@@ -166,6 +157,48 @@ class AllemandeSingleVariant extends SingleVariantMoveInterpreter<Allemande, all
 }
 
 class Allemande extends MoveInterpreter<allemandeMoves> {
+  public readonly allemandeCircling: number;
+  public readonly orbitCircling: number;
+  public readonly byHandOrShoulder: Hand;
+  public readonly swap: boolean;
+  public readonly orbitSwap: boolean;
+  public readonly returnToStart: boolean;
+  public readonly intoWave: boolean;
+  public readonly intoWavePositions: number;
+
+  constructor(args: MoveInterpreterCtorArgs<allemandeMoves>) {
+    super(args);
+
+    this.allemandeCircling = this.move.move === "allemande orbit" ? this.move.parameters.circling1 : this.move.parameters.circling;
+    this.byHandOrShoulder = (this.move.move === "gyre" ? this.move.parameters.shoulder : this.move.parameters.hand) ? Hand.Right : Hand.Left;
+
+    // TODO Not sure if this is right.
+    this.swap = this.allemandeCircling % 360 === 180;
+    this.returnToStart = this.allemandeCircling % 360 === 0;
+    this.intoWave = !this.swap && !this.returnToStart && this.allemandeCircling % 90 == 0;
+    this.intoWavePositions = !this.intoWave
+      ? 0
+      : (this.allemandeCircling % 360 === 90) === (this.byHandOrShoulder === Hand.Left)
+        ? +1
+        : -1;
+    if (!this.swap && !this.returnToStart && !this.intoWave) {
+      // TODO Support allemande that's not a swap or no-op.
+      throw "Unsupported allemande circle amount: " + this.allemandeCircling;
+    }
+
+    if (this.move.move === "allemande orbit") {
+      this.orbitCircling = this.move.parameters.circling2;
+      this.orbitSwap = this.orbitCircling % 360 === 180;
+      if (!this.orbitSwap && this.orbitCircling % 360 !== 0) {
+        // TODO Support allemande that's not a swap or no-op.
+        throw "Unsupported allemande orbit amount: " + this.orbitCircling;
+      }
+    } else {
+      this.orbitCircling = 0;
+      this.orbitSwap = false;
+    }
+  }
+
   override allowStartingClose(): boolean {
     return true;
   }

www/js/moves/hey.ts

@@ -1,263 +1,242 @@
 import { DancerIdentity } from "../danceCommon.js";
 import { SemanticPosition, PositionKind, ShortLinesPosition, CirclePosition, CircleSide, Facing } from "../interpreterCommon.js";
-import { Move } from "../libfigureMapper.js";
 import { LowLevelMove, SemanticAnimationKind } from "../lowLevelMove.js";
 import { Hand } from "../rendererConstants.js";
-import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, PartialLowLevelMove, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, moveInterpreters } from "./_moveInterpreter.js";
+import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, MoveInterpreterCtorArgs, PartialLowLevelMove, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, moveInterpreters } from "./_moveInterpreter.js";
 import { dancerIsPair } from "../libfigure/util.js";
 
-const moveName: Move["move"] = "hey";
+const moveName = "hey";
+
+type HeyStep = {
+  kind: "StandStill" | "Loop" | "CenterPass" | "EndsPassIn" | "EndsPassOut" | "Ricochet",
+  endPosition: SemanticPosition,
+}
+
+function fixupHeyOtherPath(withoutOtherPath: Map<DancerIdentity, (LowLevelMove & { heyStep?: HeyStep })[]>): Map<DancerIdentity, LowLevelMove[]> {
+  const numSteps = withoutOtherPath.get(DancerIdentity.OnesLark)!.length;
+  for (let i = 0; i < numSteps; i++) {
+    for (const id of withoutOtherPath.keys()) {
+      const lowLevelMove = withoutOtherPath.get(id)![i];
+      if (lowLevelMove.movementPattern.kind !== SemanticAnimationKind.PassBy
+        || !lowLevelMove.heyStep
+        || lowLevelMove.movementPattern.otherPath) {
+        continue;
+      }
+
+      const heyStepKind = lowLevelMove.heyStep.kind;
+      let foundPair = false;
+      for (const otherId of withoutOtherPath.keys()) {
+        const otherLowLevelMove = withoutOtherPath.get(otherId)![i];
+        if (id === otherId
+          || otherLowLevelMove.movementPattern.kind !== SemanticAnimationKind.PassBy
+          || !otherLowLevelMove.heyStep
+          || otherLowLevelMove.movementPattern.otherPath) {
+          continue;
+        }
+
+        const otherHeyStepKind = otherLowLevelMove.heyStep.kind;
+
+        if (heyStepKind === "CenterPass" && otherHeyStepKind === "CenterPass"
+          || (lowLevelMove.startPosition.which.leftRightSide() === otherLowLevelMove.startPosition.which.leftRightSide()
+            && (heyStepKind === "EndsPassIn" && otherHeyStepKind === "EndsPassOut"
+              || heyStepKind === "EndsPassOut" && otherHeyStepKind === "EndsPassIn"))) {
+          lowLevelMove.movementPattern.otherPath = {
+            start: { ...otherLowLevelMove.startPosition, setOffset: lowLevelMove.startPosition.setOffset, lineOffset: lowLevelMove.startPosition.lineOffset },
+            end: { ...otherLowLevelMove.endPosition, setOffset: lowLevelMove.endPosition.setOffset, lineOffset: lowLevelMove.endPosition.lineOffset },
+          }
+          otherLowLevelMove.movementPattern.otherPath = {
+            start: { ...lowLevelMove.startPosition, setOffset: otherLowLevelMove.startPosition.setOffset, lineOffset: otherLowLevelMove.startPosition.lineOffset },
+            end: { ...lowLevelMove.endPosition, setOffset: otherLowLevelMove.endPosition.setOffset, lineOffset: otherLowLevelMove.endPosition.lineOffset },
+          }
+          foundPair = true;
+          break;
+        }
+      }
+
+      if (!foundPair && heyStepKind === "EndsPassOut") {
+        // Then other is standing still.
+        const pos = {
+          ...([...withoutOtherPath.values()]
+            .map(otherMoves => otherMoves[i])
+            .filter(m => m.movementPattern.kind === SemanticAnimationKind.StandStill
+              && m.endPosition.which.leftRightSide() === lowLevelMove.endPosition.which.leftRightSide())
+          [0].endPosition),
+          setOffset: lowLevelMove.startPosition.setOffset, lineOffset: lowLevelMove.startPosition.lineOffset
+        }
+        lowLevelMove.movementPattern.otherPath = { start: pos, end: pos };
+      }
+    }
+
+    for (const id of withoutOtherPath.keys()) {
+      const lowLevelMove = withoutOtherPath.get(id)![i];
+      if (lowLevelMove.movementPattern.kind === SemanticAnimationKind.PassBy
+        && !lowLevelMove.movementPattern.otherPath) {
+        throw new Error("Failed to fill in otherPath for " + id + " on hey step " + i);
+      }
+    }
+  }
+
+  // Object was mutated.
+  return withoutOtherPath;
+}
 
 class HeySingleVariant extends SingleVariantMoveInterpreter<Hey, typeof moveName> {
-  moveAsLowLevelMoves(): LowLevelMovesForAllDancers {
+  heyStepToPartialLowLevelMove(heyStep: HeyStep): PartialLowLevelMove & { heyStep: HeyStep } {
-    // Needed for inner functions... that probably should be methods.
+    return {
-    const move = this.move;
+      beats: this.moveInterpreter.heyPartBeats,
+      // TODO use circle positions on ends? ... unless hey ends in a box the gnat or similar...
+      endPosition: heyStep.endPosition,
+      movementPattern: heyStep.kind === "StandStill" ? {
+        kind: SemanticAnimationKind.StandStill,
+      } : heyStep.kind === "Loop" ? {
+        // TODO Loop should probably be its own kind? Or RotateAround?
+        kind: SemanticAnimationKind.Linear,
+        minRotation: this.moveInterpreter.endsShoulder === Hand.Right ? +180 : -180,
+      } : heyStep.kind === "Ricochet" ? {
+        // TODO This is a hack.
+        kind: SemanticAnimationKind.PassBy,
+        around: heyStep.endPosition.which.leftRightSide(),
+        withHands: false,
+        otherPath: "Swap",
+        facing: "Start",
+        side: this.moveInterpreter.endsShoulder,
+      } : {
+        kind: SemanticAnimationKind.PassBy,
+        around: heyStep.kind === "CenterPass" ? "Center" : heyStep.endPosition.which.leftRightSide(),
+        withHands: false,
+        side: heyStep.kind === "CenterPass" ? this.moveInterpreter.centerShoulder : this.moveInterpreter.endsShoulder,
+        facing: "Start",
+        otherPath: undefined!, // Placeholder, fixup later.
+      },
+      heyStep,
+    };
+  }
 
-    type HeyStep = {
+  continueHey(prevStep: HeyStep, stepsLeft: number,
-      kind: "StandStill" | "Loop" | "CenterPass" | "EndsPassIn" | "EndsPassOut" | "Ricochet",
+      { beenInCenter, endsInCircle, inCenterFirst }:
-      endPosition: SemanticPosition,
+        { beenInCenter: boolean, endsInCircle: boolean, inCenterFirst: boolean }): HeyStep {
-    }
+    // TODO Not sure why type checker requires rechecking this here.
+    if (this.move.move !== "hey") throw new Error("Unreachable.");
 
-    if (this.move.parameters.dir !== "across") {
+    // Continuing hey so everyone is either passing (in center or on ends) or looping on ends.
-      throw new Error("Unsupported hey direction: " + this.move.parameters.dir);
+    if (prevStep.endPosition.kind === PositionKind.Circle) {
-    }
+      if (prevStep.endPosition.facing === prevStep.endPosition.which.facingAcross()) {
-
+        if (stepsLeft === 0) {
-    let heyParts: number;
+          return {
-    switch (this.move.parameters.until) {
+            kind: "StandStill",
-      case "half":
+            endPosition: prevStep.endPosition,
-        heyParts = 4;
-        break;
-      case "full":
-        heyParts = 8;
-        break;
-      default:
-        throw new Error("Unsupported hey 'until': " + this.move.parameters.until);
-    }
-    const heyPartBeats: number = this.move.beats / heyParts;
-    // TODO is this right?
-    const firstPassInCenter: boolean = dancerIsPair(this.move.parameters.who);
-    const centerShoulder = firstPassInCenter === this.move.parameters.shoulder ? Hand.Right : Hand.Left;
-    const endsShoulder = centerShoulder.opposite();
-
-    function fixupHeyOtherPath(withoutOtherPath: Map<DancerIdentity, (LowLevelMove & { heyStep?: HeyStep })[]>): Map<DancerIdentity, LowLevelMove[]> {
-      const numSteps = withoutOtherPath.get(DancerIdentity.OnesLark)!.length;
-      for (let i = 0; i < numSteps; i++) {
-        for (const id of withoutOtherPath.keys()) {
-          const lowLevelMove = withoutOtherPath.get(id)![i];
-          if (lowLevelMove.movementPattern.kind !== SemanticAnimationKind.PassBy
-            || !lowLevelMove.heyStep
-            || lowLevelMove.movementPattern.otherPath) {
-            continue;
-          }
-
-          const heyStepKind = lowLevelMove.heyStep.kind;
-          let foundPair = false;
-          for (const otherId of withoutOtherPath.keys()) {
-            const otherLowLevelMove = withoutOtherPath.get(otherId)![i];
-            if (id === otherId
-              || otherLowLevelMove.movementPattern.kind !== SemanticAnimationKind.PassBy
-              || !otherLowLevelMove.heyStep
-              || otherLowLevelMove.movementPattern.otherPath) {
-              continue;
-            }
-
-            const otherHeyStepKind = otherLowLevelMove.heyStep.kind;
-
-            if (heyStepKind === "CenterPass" && otherHeyStepKind === "CenterPass"
-              || (lowLevelMove.startPosition.which.leftRightSide() === otherLowLevelMove.startPosition.which.leftRightSide()
-                && (heyStepKind === "EndsPassIn" && otherHeyStepKind === "EndsPassOut"
-                  || heyStepKind === "EndsPassOut" && otherHeyStepKind === "EndsPassIn"))) {
-              lowLevelMove.movementPattern.otherPath = {
-                start: { ...otherLowLevelMove.startPosition, setOffset: lowLevelMove.startPosition.setOffset, lineOffset: lowLevelMove.startPosition.lineOffset },
-                end: { ...otherLowLevelMove.endPosition, setOffset: lowLevelMove.endPosition.setOffset, lineOffset: lowLevelMove.endPosition.lineOffset },
-              }
-              otherLowLevelMove.movementPattern.otherPath = {
-                start: { ...lowLevelMove.startPosition, setOffset: otherLowLevelMove.startPosition.setOffset, lineOffset: otherLowLevelMove.startPosition.lineOffset },
-                end: { ...lowLevelMove.endPosition, setOffset: otherLowLevelMove.endPosition.setOffset, lineOffset: otherLowLevelMove.endPosition.lineOffset },
-              }
-              foundPair = true;
-              break;
-            }
-          }
-
-          if (!foundPair && heyStepKind === "EndsPassOut") {
-            // Then other is standing still.
-            const pos = {
-              ...([...withoutOtherPath.values()]
-                .map(otherMoves => otherMoves[i])
-                .filter(m => m.movementPattern.kind === SemanticAnimationKind.StandStill
-                  && m.endPosition.which.leftRightSide() === lowLevelMove.endPosition.which.leftRightSide())
-              [0].endPosition),
-              setOffset: lowLevelMove.startPosition.setOffset, lineOffset: lowLevelMove.startPosition.lineOffset
-            }
-            lowLevelMove.movementPattern.otherPath = { start: pos, end: pos };
           }
         }
-
-        for (const id of withoutOtherPath.keys()) {
-          const lowLevelMove = withoutOtherPath.get(id)![i];
-          if (lowLevelMove.movementPattern.kind === SemanticAnimationKind.PassBy
-            && !lowLevelMove.movementPattern.otherPath) {
-            throw new Error("Failed to fill in otherPath for " + id + " on hey step " + i);
-          }
-        }
-      }
-
-      // Object was mutated.
-      return withoutOtherPath;
-    }
-
-    return fixupHeyOtherPath(this.handleMove(({ id, startPos }) => {
-      const endsInCircle = startPos.kind === PositionKind.Circle;
-      function heyStepToPartialLowLevelMove(heyStep: HeyStep): PartialLowLevelMove & { heyStep: HeyStep } {
         return {
-          beats: heyPartBeats,
+          kind: "EndsPassIn",
-          // TODO use circle positions on ends? ... unless hey ends in a box the gnat or similar...
+          endPosition: {
-          endPosition: heyStep.endPosition,
+            kind: PositionKind.ShortLines,
-          movementPattern: heyStep.kind === "StandStill" ? {
+            which: prevStep.endPosition.which.isLeft() ? ShortLinesPosition.MiddleLeft : ShortLinesPosition.MiddleRight,
-            kind: SemanticAnimationKind.StandStill,
+            facing: prevStep.endPosition.which.facingAcross(),
-          } : heyStep.kind === "Loop" ? {
+            setOffset: prevStep.endPosition.setOffset,
-            // TODO Loop should probably be its own kind? Or RotateAround?
+            lineOffset: prevStep.endPosition.lineOffset,
-            kind: SemanticAnimationKind.Linear,
-            minRotation: endsShoulder === Hand.Right ? +180 : -180,
-          } : heyStep.kind === "Ricochet" ? {
-            // TODO This is a hack.
-            kind: SemanticAnimationKind.PassBy,
-            around: heyStep.endPosition.which.leftRightSide(),
-            withHands: false,
-            otherPath: "Swap",
-            facing: "Start",
-            side: endsShoulder,
-          } : {
-            kind: SemanticAnimationKind.PassBy,
-            around: heyStep.kind === "CenterPass" ? "Center" : heyStep.endPosition.which.leftRightSide(),
-            withHands: false,
-            side: heyStep.kind === "CenterPass" ? centerShoulder : endsShoulder,
-            facing: "Start",
-            otherPath: undefined!, // Placeholder, fixup later.
           },
-          heyStep,
+        }
-        };
       }
-      function continueHey(prevStep: HeyStep, stepsLeft: number, beenInCenter: boolean): HeyStep {
+      else {
-        // TODO Not sure why type checker requires rechecking this here.
+        if (stepsLeft === 1 && !endsInCircle) {
-        if (move.move !== "hey") throw new Error("Unreachable.");
+          return {
-
+            kind: "Loop",
-        // Continuing hey so everyone is either passing (in center or on ends) or looping on ends.
+            endPosition: {
-        if (prevStep.endPosition.kind === PositionKind.Circle) {
+              kind: PositionKind.ShortLines,
-          if (prevStep.endPosition.facing === prevStep.endPosition.which.facingAcross()) {
+              which: prevStep.endPosition.which.isLeft() ? ShortLinesPosition.FarLeft : ShortLinesPosition.FarRight,
-            if (stepsLeft === 0) {
+              facing: prevStep.endPosition.which.facingAcross(),
-              return {
+              setOffset: prevStep.endPosition.setOffset,
-                kind: "StandStill",
+              lineOffset: prevStep.endPosition.lineOffset,
-                endPosition: prevStep.endPosition,
+            },
-              }
-            }
-            return {
-              kind: "EndsPassIn",
-              endPosition: {
-                kind: PositionKind.ShortLines,
-                which: prevStep.endPosition.which.isLeft() ? ShortLinesPosition.MiddleLeft : ShortLinesPosition.MiddleRight,
-                facing: prevStep.endPosition.which.facingAcross(),
-                setOffset: prevStep.endPosition.setOffset,
-                lineOffset: prevStep.endPosition.lineOffset,
-              },
-            }
-          }
-          else {
-            if (stepsLeft === 1 && !endsInCircle) {
-              return {
-                kind: "Loop",
-                endPosition: {
-                  kind: PositionKind.ShortLines,
-                  which: prevStep.endPosition.which.isLeft() ? ShortLinesPosition.FarLeft : ShortLinesPosition.FarRight,
-                  facing: prevStep.endPosition.which.facingAcross(),
-                  setOffset: prevStep.endPosition.setOffset,
-                  lineOffset: prevStep.endPosition.lineOffset,
-                },
-              }
-            }
-            return {
-              kind: "Loop",
-              endPosition: {
-                ...prevStep.endPosition,
-                which: prevStep.endPosition.which.swapUpAndDown(),
-                facing: prevStep.endPosition.which.facingAcross()
-              },
-            }
           }
         }
-        else if (prevStep.endPosition.kind === PositionKind.ShortLines) {
+        return {
-          const isFacingSide = prevStep.endPosition.facing === prevStep.endPosition.which.facingSide();
+          kind: "Loop",
-          const inMiddle = prevStep.endPosition.which.isMiddle();
+          endPosition: {
-          if (!inMiddle && !isFacingSide) {
+            ...prevStep.endPosition,
-            return {
+            which: prevStep.endPosition.which.swapUpAndDown(),
-              kind: "Loop",
+            facing: prevStep.endPosition.which.facingAcross()
-              endPosition: { ...prevStep.endPosition, facing: prevStep.endPosition.which.facingSide() },
+          },
-            }
+        }
-          } else if (inMiddle && isFacingSide) {
+      }
-            return {
+    }
-              kind: "EndsPassOut",
+    else if (prevStep.endPosition.kind === PositionKind.ShortLines) {
-              endPosition: {
+      const isFacingSide = prevStep.endPosition.facing === prevStep.endPosition.which.facingSide();
-                ...prevStep.endPosition,
+      const inMiddle = prevStep.endPosition.which.isMiddle();
-                kind: PositionKind.Circle,
+      if (!inMiddle && !isFacingSide) {
-                which: prevStep.endPosition.which.isLeft()
+        return {
-                  ? (endsShoulder === Hand.Right ? CirclePosition.TopLeft : CirclePosition.BottomLeft)
+          kind: "Loop",
-                  : (endsShoulder === Hand.Right ? CirclePosition.BottomRight : CirclePosition.TopRight),
+          endPosition: { ...prevStep.endPosition, facing: prevStep.endPosition.which.facingSide() },
-              },
+        }
-            }
+      } else if (inMiddle && isFacingSide) {
-          }
+        return {
-          else if (!isFacingSide) {
+          kind: "EndsPassOut",
-            const rico = inCenterFirst
+          endPosition: {
-              ? beenInCenter
+            ...prevStep.endPosition,
-                ? move.parameters.rico3
+            kind: PositionKind.Circle,
-                : move.parameters.rico1
+            which: prevStep.endPosition.which.isLeft()
-              : beenInCenter
+              ? (this.moveInterpreter.endsShoulder === Hand.Right ? CirclePosition.TopLeft : CirclePosition.BottomLeft)
-                ? move.parameters.rico4
+              : (this.moveInterpreter.endsShoulder === Hand.Right ? CirclePosition.BottomRight : CirclePosition.TopRight),
-                : move.parameters.rico2;
+          },
+        }
+      }
+      else if (!isFacingSide) {
+        const rico = inCenterFirst
+          ? beenInCenter
+            ? this.move.parameters.rico3
+            : this.move.parameters.rico1
+          : beenInCenter
+            ? this.move.parameters.rico4
+            : this.move.parameters.rico2;
 
-            if (rico) {
+        if (rico) {
-              const onLeftSide = prevStep.endPosition.which.isLeft();
+          const onLeftSide = prevStep.endPosition.which.isLeft();
-              return {
+          return {
-                kind: "Ricochet",
+            kind: "Ricochet",
-                endPosition: {
+            endPosition: {
-                  ...prevStep.endPosition,
+              ...prevStep.endPosition,
-                  kind: PositionKind.Circle,
+              kind: PositionKind.Circle,
-                  which: CirclePosition.fromSides(prevStep.endPosition.which.leftRightSide(),
+              which: CirclePosition.fromSides(prevStep.endPosition.which.leftRightSide(),
-                    // TODO might be swapped
+                // TODO might be swapped
-                    (endsShoulder === Hand.Left) === onLeftSide ? CircleSide.Top : CircleSide.Bottom),
+                (this.moveInterpreter.endsShoulder === Hand.Left) === onLeftSide ? CircleSide.Top : CircleSide.Bottom),
-                  facing: onLeftSide ? Facing.Left : Facing.Right,
+              facing: onLeftSide ? Facing.Left : Facing.Right,
-                }
-              }
-            } else {
-              return {
-                kind: "CenterPass",
-                endPosition: {
-                  ...prevStep.endPosition,
-                  which: prevStep.endPosition.which.swapSides()
-                },
-              }
-            }
-          }
-          else {
-            return {
-              kind: inMiddle ? "EndsPassOut" : "EndsPassIn",
-              endPosition: {
-                ...prevStep.endPosition,
-                which: prevStep.endPosition.which.swapOnSide()
-              },
             }
           }
         } else {
-          throw new Error("Unexpected PositionKind: " + (<any>prevStep.endPosition).kind);
+          return {
+            kind: "CenterPass",
+            endPosition: {
+              ...prevStep.endPosition,
+              which: prevStep.endPosition.which.swapSides()
+            },
+          }
         }
       }
+      else {
+        return {
+          kind: inMiddle ? "EndsPassOut" : "EndsPassIn",
+          endPosition: {
+            ...prevStep.endPosition,
+            which: prevStep.endPosition.which.swapOnSide()
+          },
+        }
+      }
+    } else {
+      throw new Error("Unexpected PositionKind: " + (<any>prevStep.endPosition).kind);
+    }
+  }
 
-      const inCenterFirst = firstPassInCenter && this.findPairOpposite(this.move.parameters.who, id) !== null
+  moveAsLowLevelMoves(): LowLevelMovesForAllDancers {
-        || this.move.parameters.who2 && this.findPairOpposite(this.move.parameters.who2, id) !== null;
+    return fixupHeyOtherPath(this.handleMove(({ id, startPos }) => {
+      const endsInCircle = startPos.kind === PositionKind.Circle;
+
+      const inCenterFirst = this.moveInterpreter.firstPassInCenter && (this.findPairOpposite(this.move.parameters.who, id) !== null)
+        || !!this.move.parameters.who2 && (this.findPairOpposite(this.move.parameters.who2, id) !== null);
 
       let firstHeyStep: HeyStep;
       let startingPos: SemanticPosition;
-      if (firstPassInCenter) {
+      if (this.moveInterpreter.firstPassInCenter) {
         if (startPos.kind !== PositionKind.Circle) {
           throw new Error("Hey starting in center not from circle is unsupported.");
         }
@@ -319,18 +298,60 @@ class HeySingleVariant extends SingleVariantMoveInterpreter<Hey, typeof moveName
 
       const heySteps: HeyStep[] = [firstHeyStep];
       let beenInCenter = firstHeyStep.kind === "CenterPass" || firstHeyStep.kind === "Ricochet";
-      for (let i = 1; i < heyParts; i++) {
+      for (let i = 1; i < this.moveInterpreter.heyParts; i++) {
-        const isLast = i === heyParts - 1;
+        const nextHeyStep = this.continueHey(heySteps[i - 1], this.moveInterpreter.heyParts - i - 1, {beenInCenter, endsInCircle, inCenterFirst});
-        const nextHeyStep = continueHey(heySteps[i - 1], heyParts - i - 1, beenInCenter);
         beenInCenter ||= nextHeyStep.kind === "CenterPass" || nextHeyStep.kind === "Ricochet";
         heySteps.push(nextHeyStep);
       }
-      return this.combine(heySteps.map(heyStepToPartialLowLevelMove), { ...startingPos, hands: undefined });
+      return this.combine(heySteps.map(s => this.heyStepToPartialLowLevelMove(s)), { ...startingPos, hands: undefined });
     }));
   }
 }
 
 class Hey extends MoveInterpreter<typeof moveName> {
+  public readonly heyParts: number;
+  public readonly heyPartBeats: number;
+  public readonly firstPassInCenter: boolean;
+  public readonly centerShoulder: Hand;
+  public readonly endsShoulder: Hand;
+
+  constructor(args: MoveInterpreterCtorArgs<typeof moveName>) {
+    super(args);
+
+    if (this.move.parameters.dir !== "across") {
+      throw new Error("Unsupported hey direction: " + this.move.parameters.dir);
+    }
+
+    if (typeof this.move.parameters.until === "string") {
+      switch (this.move.parameters.until) {
+        case "half":
+          this.heyParts = 4;
+          break;
+        case "full":
+          this.heyParts = 8;
+          break;
+        // TODO Are these right? Can it sometimes be 1 or 3 instead of 2?
+        case "less than half":
+          this.heyParts = 2;
+          break;
+        case "between half and full":
+          this.heyParts = 6;
+        default:
+          throw new Error("Unsupported hey 'until': " + this.move.parameters.until);
+      }
+    }
+    else {
+      // TODO Is this actually this simple?
+      this.heyParts = this.move.parameters.until.time === 1 ? 2 : 6;
+      //throw new Error("Unsupported hey 'until': " + this.move.parameters.until.dancer + " time " + this.move.parameters.until.time);
+    }
+    this.heyPartBeats = this.move.beats / this.heyParts;
+    // TODO is this right?
+    this.firstPassInCenter = dancerIsPair(this.move.parameters.who);
+    this.centerShoulder = this.firstPassInCenter === this.move.parameters.shoulder ? Hand.Right : Hand.Left;
+    this.endsShoulder = this.centerShoulder.opposite();
+  }
+
   buildSingleVariantMoveInterpreter(startingPos: SemanticPositionsForAllDancers): ISingleVariantMoveInterpreter {
     return new HeySingleVariant(this, startingPos);
   }

www/js/moves/pullByDancers.ts

@@ -1,43 +1,71 @@
-import { HandConnection, HandTo, BalanceWeight } from "../interpreterCommon.js";
+import { HandConnection, HandTo, BalanceWeight, PositionKind, ShortLinesPosition, SemanticPosition } from "../interpreterCommon.js";
-import { Move } from "../libfigureMapper.js";
 import { SemanticAnimationKind } from "../lowLevelMove.js";
 import { Hand } from "../rendererConstants.js";
-import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, PartialLowLevelMove, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, moveInterpreters } from "./_moveInterpreter.js";
+import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, MoveInterpreterCtorArgs, PartialLowLevelMove, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, Variant, VariantCollection, moveInterpreters } from "./_moveInterpreter.js";
 
-const moveName: Move["move"] = "pull by dancers";
+const moveName = "pull by dancers";
 
 class PullByDancersSingleVariant extends SingleVariantMoveInterpreter<PullByDancers, typeof moveName> {
-  moveAsLowLevelMoves(): LowLevelMovesForAllDancers {
+  moveAsVariants(previousMoveVariant: string): VariantCollection {
+    const res = new Map<string, Variant>();
+
+    for (const toShortLines of [true, false]) {
+      try {
+        res.set(toShortLines ? "ToShortLines" : "FullPullBy", {
+          lowLevelMoves: this.moveAsLowLevelMovesTo(toShortLines),
+          previousMoveVariant
+        });
+      }
+      catch { }
+    }
+
+    return res;
+  }
+
+
+  moveAsLowLevelMovesTo(toShortLines: boolean): LowLevelMovesForAllDancers {
     // TODO Might make sense to think of pull by as not a full swap?
     //  e.g., in Blue and Green Candles, it's treated as only getting to
     //        ShortLinesPosition.Middle* before doing an allemande.
     return this.handlePairedMove(this.move.parameters.who, ({ startPos, around, withPos }) => {
-      const hand = this.move.parameters.hand ? Hand.Right : Hand.Left;
+      if (toShortLines) {
-      const balanceBeats = this.move.parameters.bal
+        if (startPos.kind !== PositionKind.Circle) {
-        ? this.move.beats > 4
+          throw new Error("ToShortLines variant of " + this.move.move + " only makes sense starting from a circle.");
-          ? this.move.beats - 4
+        }
-          : 2
+      }
-        : 0;
-      const balancePartBeats = balanceBeats / 2;
-      const pullBeats = this.move.beats - balanceBeats;
 
       // TODO Adjust facing?
       const startPosition = {
         ...startPos,
         hands: new Map<Hand, HandConnection>([
           [
-            hand,
+            this.moveInterpreter.hand,
-            { hand, to: around === "Center" ? HandTo.DiagonalAcrossCircle : HandTo.DancerForward }
+            { hand: this.moveInterpreter.hand, to: around === "Center" ? HandTo.DiagonalAcrossCircle : HandTo.DancerForward }
-          ]])
+          ]]),
+        facing: startPos.which.facingAcross(),
       };
 
+      const endPos: SemanticPosition = toShortLines
+        ? {
+          ...withPos,
+          hands: undefined,
+          facing: startPosition.facing,
+          kind: PositionKind.ShortLines,
+          which: ShortLinesPosition.fromSide(withPos.which.leftRightSide(), "Middle"),
+          longLines: undefined, // Needed to satisfy type-checker.
+        }
+        : {
+          ...withPos,
+          hands: undefined,
+          facing: startPosition.facing,
+        };
       const passBy: PartialLowLevelMove = {
-        beats: pullBeats,
+        beats: this.moveInterpreter.pullBeats,
-        endPosition: { ...withPos, facing: startPos.facing },
+        endPosition: endPos,
         movementPattern: {
           kind: SemanticAnimationKind.PassBy,
           around,
-          side: hand,
+          side: this.moveInterpreter.hand,
           withHands: true,
           facing: "Start",
           otherPath: "Swap",
@@ -47,7 +75,7 @@ class PullByDancersSingleVariant extends SingleVariantMoveInterpreter<PullByDanc
       if (this.move.parameters.bal) {
         return this.combine([
           {
-            beats: balancePartBeats,
+            beats: this.moveInterpreter.balancePartBeats,
             endPosition: {
               ...startPosition,
               balance: BalanceWeight.Forward,
@@ -57,7 +85,7 @@ class PullByDancersSingleVariant extends SingleVariantMoveInterpreter<PullByDanc
             }
           },
           {
-            beats: balancePartBeats,
+            beats: this.moveInterpreter.balancePartBeats,
             endPosition: {
               ...startPosition,
               balance: BalanceWeight.Backward,
@@ -70,11 +98,45 @@ class PullByDancersSingleVariant extends SingleVariantMoveInterpreter<PullByDanc
       } else {
         return this.combine([passBy], startPosition);
       }
+    }, !toShortLines ? undefined : ({startPos}) => {
+      return this.combine([{
+        beats: this.move.beats,
+        movementPattern: {
+          kind: SemanticAnimationKind.Linear,
+        },
+        endPosition: {
+          ...startPos,
+          kind: PositionKind.ShortLines,
+          which: ShortLinesPosition.fromSide(startPos.which.leftRightSide(), "Far"),
+          facing: startPos.which.facingAcross(),
+          hands: undefined,
+          longLines: undefined,
+        }
+      }], startPos);
     });
   }
 }
 
 class PullByDancers extends MoveInterpreter<typeof moveName> {
+  public readonly hand: Hand;
+  public readonly balancePartBeats: number;
+  public readonly pullBeats: number; 
+
+  constructor(args: MoveInterpreterCtorArgs<typeof moveName>) {
+    super(args);
+
+    this.hand = this.move.parameters.hand ? Hand.Right : Hand.Left;
+    const balanceBeats = this.move.parameters.bal
+      ? this.move.beats > 4
+        ? this.move.beats - 4
+        : this.move.beats > 2
+          ? 2
+          : this.move.beats / 2
+      : 0;
+    this.balancePartBeats = balanceBeats / 2;
+    this.pullBeats = this.move.beats - balanceBeats;
+  }
+
   buildSingleVariantMoveInterpreter(startingPos: SemanticPositionsForAllDancers): ISingleVariantMoveInterpreter {
     return new PullByDancersSingleVariant(this, startingPos);
   }

www/js/moves/roryOMore.ts

@@ -1,24 +1,14 @@
-import { PositionKind, SemanticPosition, Facing, BalanceWeight, handsInLine } from "../interpreterCommon.js";
+import { PositionKind, SemanticPosition, Facing, BalanceWeight, handsInLine, CircleSide, handsInLongLines } from "../interpreterCommon.js";
-import { Move } from "../libfigureMapper.js";
 import { SemanticAnimationKind } from "../lowLevelMove.js";
 import { Hand } from "../rendererConstants.js";
-import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, PartialLowLevelMove, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, moveInterpreters } from "./_moveInterpreter.js";
+import { ISingleVariantMoveInterpreter, LowLevelMovesForAllDancers, MoveInterpreter, MoveInterpreterCtorArgs, PartialLowLevelMove, SemanticPositionsForAllDancers, SingleVariantMoveInterpreter, moveInterpreters } from "./_moveInterpreter.js";
 
-const moveName: Move["move"] = "Rory O'More";
+const moveName = "Rory O'More";
 class RoryOMoreSingleVariant extends SingleVariantMoveInterpreter<RoryOMore, typeof moveName> {
   moveAsLowLevelMoves(): LowLevelMovesForAllDancers {
-    if (this.move.parameters.who !== "everyone") {
-      throw new Error(this.move.move + " that doesn't include everyone is unsupported.");
-    }
 
     // TODO Could be in long or short lines.
-    const roryDir = this.move.parameters.slide ? Hand.Left : Hand.Right;
-    const balBeats = this.move.parameters.bal ? this.move.beats / 2 : 0;
-    const balPartBeats = balBeats / 2;
-    const roryBeats = this.move.beats - balBeats;
     return this.handleMove(({ startPos }) => {
-      const isShortLines: boolean = startPos.kind === PositionKind.ShortLines;
-
       const startingPos: SemanticPosition = {
         ...startPos,
         hands: handsInLine({ wavy: true, which: startPos.which, facing: startPos.facing })
@@ -27,38 +17,61 @@ class RoryOMoreSingleVariant extends SingleVariantMoveInterpreter<RoryOMore, typ
       let endPos: SemanticPosition;
       if (startPos.kind === PositionKind.ShortLines) {
         if (startPos.facing !== Facing.Up && startPos.facing !== Facing.Down) {
-          throw new Error("To be in wavy lines, must be facing up or down, not " + startPos.facing);
+          throw new Error("To be in short wavy lines, must be facing up or down, not " + startPos.facing);
+        }
+        const { newPos: endWhich, wrap } = startPos.which.shiftWithWrap(this.moveInterpreter.dir, startPos.facing);
+        const endLineOffset = !wrap
+          ? startPos.lineOffset
+          : (startPos.lineOffset ?? 0) + wrap;
+        if (wrap) {
+          startingPos.hands = handsInLongLines(true)
         }
-        const endWhich = startPos.which.shift(roryDir, startPos.facing);
         endPos = {
           ...startPos,
           which: endWhich,
-          hands: handsInLine({ wavy: true, which: endWhich, facing: startPos.facing })
+          hands: handsInLine({ wavy: true, which: endWhich, facing: startPos.facing }),
+          lineOffset: endLineOffset,
         };
       } else {
-        throw new Error(this.move.move + " is currently only supported in short lines.");
+        if (startPos.facing !== Facing.Left && startPos.facing !== Facing.Right) {
+          throw new Error("To be in long wavy lines, must be facing left or right, not " + startPos.facing);
+        }
+        const endWhich = startPos.which.swapUpAndDown();
+        const sideTowards = (startPos.facing === Facing.Right)
+                            === (this.moveInterpreter.dir === Hand.Left)
+                              ? CircleSide.Bottom
+                              : CircleSide.Top;
+        const endSetOffset = sideTowards === endWhich.topBottomSide()
+          ? startPos.setOffset
+          : (startPos.setOffset ?? 0) + (sideTowards === CircleSide.Bottom ? +1 : -1);
+        endPos = {
+          ...startPos,
+          which: endWhich,
+          hands: handsInLine({ wavy: true, which: endWhich, facing: startPos.facing }),
+          setOffset: endSetOffset,
+        };
       }
 
       const maybeBalance: PartialLowLevelMove[] = (this.move.parameters.bal ? [
         {
-          beats: balPartBeats,
+          beats: this.moveInterpreter.balPartBeats,
-          endPosition: { ...startingPos, balance: roryDir === Hand.Left ? BalanceWeight.Left : BalanceWeight.Right },
+          endPosition: { ...startingPos, balance: this.moveInterpreter.dir === Hand.Left ? BalanceWeight.Left : BalanceWeight.Right },
           movementPattern: { kind: SemanticAnimationKind.Linear },
         },
         {
-          beats: balPartBeats,
+          beats: this.moveInterpreter.balPartBeats,
-          endPosition: { ...startingPos, balance: roryDir === Hand.Left ? BalanceWeight.Right : BalanceWeight.Left },
+          endPosition: { ...startingPos, balance: this.moveInterpreter.dir === Hand.Left ? BalanceWeight.Right : BalanceWeight.Left },
           movementPattern: { kind: SemanticAnimationKind.Linear },
         },
       ] : []);
 
       return this.combine([...maybeBalance,
       {
-        beats: roryBeats,
+        beats: this.moveInterpreter.roryBeats,
         endPosition: endPos,
         movementPattern: {
           kind: SemanticAnimationKind.Linear,
-          minRotation: roryDir === Hand.Right ? +360 : -360,
+          minRotation: this.moveInterpreter.dir === Hand.Right ? +360 : -360,
           handsDuring: "None",
         },
       }
@@ -68,6 +81,23 @@ class RoryOMoreSingleVariant extends SingleVariantMoveInterpreter<RoryOMore, typ
 }
 
 class RoryOMore extends MoveInterpreter<typeof moveName> {
+  public readonly dir: Hand;
+  public readonly balPartBeats: number;
+  public readonly roryBeats: number;
+
+  constructor(args: MoveInterpreterCtorArgs<typeof moveName>) {
+    super(args);
+
+    if (this.move.parameters.who !== "everyone") {
+      throw new Error(this.move.move + " that doesn't include everyone is unsupported.");
+    }
+
+    this.dir = this.move.parameters.slide ? Hand.Left : Hand.Right;
+    const balBeats = this.move.parameters.bal ? this.move.beats / 2 : 0;
+    this.balPartBeats = balBeats / 2;
+    this.roryBeats = this.move.beats - balBeats;
+  }
+
   buildSingleVariantMoveInterpreter(startingPos: SemanticPositionsForAllDancers): ISingleVariantMoveInterpreter {
     return new RoryOMoreSingleVariant(this, startingPos);
   }