www/js/interpreter.ts

@@ -64,20 +64,6 @@ function handsInLine(args: { wavy: boolean } & ({ which: ShortLinesPosition, fac
     ]);
   }
 }
-function handToDancerToSideInCircleFacingAcross(which: CirclePosition): Map<Hand, HandConnection> {
-  return new Map<Hand, HandConnection>([
-    which.isOnLeftLookingAcross()
-      ? [Hand.Right, { hand: Hand.Left, to: HandTo.DancerRight }]
-      : [Hand.Left, { hand: Hand.Right, to: HandTo.DancerLeft }]
-  ]);
-}
-function handToDancerToSideInCircleFacingUpOrDown(which: CirclePosition): Map<Hand, HandConnection> {
-  return new Map<Hand, HandConnection>([
-    which.isOnLeftLookingUpAndDown()
-      ? [Hand.Right, { hand: Hand.Left, to: HandTo.DancerRight }]
-      : [Hand.Left, { hand: Hand.Right, to: HandTo.DancerLeft }]
-  ]);
-}
 
 function balanceCircleInAndOut(move: Move, startPos: SemanticPosition, balanceBeats?: number): [LowLevelMove, LowLevelMove] {
   if (startPos.kind !== PositionKind.Circle) {
@@ -464,8 +450,7 @@ function moveAsLowLevelMoves({ move, nextMove, startingPos, numProgessions }: {
           movementPattern: {
             // TODO Not sure loop should really be linear...
             kind: SemanticAnimationKind.Linear,
-            minRotation: isCrossing ? undefined : circulateRight ? 180 : -180,
+            minRotation: isCrossing ? undefined : circulateRight ? 180 : -180
-            handsDuring: "None",
           }
         };
         return combine([...balance, circulate], startingPos);
@@ -1255,45 +1240,6 @@ function moveAsLowLevelMoves({ move, nextMove, startingPos, numProgessions }: {
         }], startingPos);
       });
 
-    case "slice":
-      if (move.parameters["slice increment"] === "dancer") {
-        // TODO Maybe this only actually gets used to move an entire couple by going diagonal back?
-        throw new Error("Slicing by a single dancer is unsupported.");
-      }
-
-      const sliceLeft = move.parameters.slide;
-      const sliceReturns = move.parameters["slice return"] !== "none";
-
-      const sliceForwardBeats = sliceReturns ? move.beats / 2 : move.beats;
-      const sliceBackwardBeats = move.beats - sliceForwardBeats;
-
-      return handleCircleMove(({ startPos }) => {
-        const startingPos: SemanticPosition & { setOffset: number } = {
-          kind: PositionKind.Circle,
-          which: startPos.which,
-          facing: startPos.which.facingAcross(),
-          hands: handToDancerToSideInCircleFacingAcross(startPos.which),
-          setOffset: startPos.setOffset ?? 0,
-          lineOffset: startPos.lineOffset,
-        };
-        const sliceAmount = startingPos.which.isLeft() === sliceLeft ? +0.5 : -0.5;
-        const forwardOffset = startingPos.setOffset + sliceAmount;
-        const endOffset = move.parameters["slice return"] === "diagonal" ? forwardOffset + sliceAmount : forwardOffset;
-
-        const sliceForward: PartialLowLevelMove = {
-          beats: sliceForwardBeats,
-          endPosition: { ...startingPos, setOffset: forwardOffset, longLines: LongLines.Forward },
-          movementPattern: { kind: SemanticAnimationKind.Linear },
-        };
-        const maybeSliceBackward: PartialLowLevelMove[] = sliceReturns ? [{
-          beats: sliceBackwardBeats,
-          endPosition: { ...startingPos, setOffset: endOffset },
-          movementPattern: { kind: SemanticAnimationKind.Linear },
-        }] : [];
-
-        return combine([sliceForward, ...maybeSliceBackward], startingPos);
-      });
-
     case "down the hall":
       if (move.parameters.who !== "everyone") {
         throw new Error("Don't know what it means for not everyone to go down the hall.");
@@ -1737,26 +1683,6 @@ function moveAsLowLevelMoves({ move, nextMove, startingPos, numProgessions }: {
         return combine(heySteps.map(heyStepToPartialLowLevelMove), { ...startingPos, hands: undefined });
       });
 
-    case "turn alone":
-      if (move.parameters.who !== "everyone" || move.beats !== 0) {
-        throw new Error("turn alone unsupported except for changing to new circle.");
-      }
-      return handleCircleMove(({startPos}) => {
-        const which = startPos.which.swapUpAndDown();
-        const startAndEndPos: SemanticPosition = {
-          ...startPos,
-          which,
-          facing: which.facingUpOrDown(),
-          setOffset: (startPos.setOffset ?? 0) + (startPos.which.isTop() ? +0.5 : -0.5),
-        }
-
-        return combine([{
-          beats: move.beats,
-          endPosition: startAndEndPos,
-          movementPattern: { kind: SemanticAnimationKind.StandStill },
-        }], startAndEndPos);
-      })
-
     case "custom":
       if (move.parameters.custom.includes("mirrored mad robin")) {
         return handleCircleMove(({ id, startPos }) => {

www/js/lowLevelMove.ts

@@ -3,7 +3,7 @@ import * as common from "./danceCommon.js";
 import { DanceRole, DancerIdentity, Rotation } from "./danceCommon.js";
 import { BalanceWeight, CirclePosition, CircleSide, CircleSideOrCenter, DancerDistance, Facing, HandConnection, HandTo, LongLines, PositionKind, SemanticPosition, ShortLinesPosition, StarGrip } from "./interpreterCommon.js";
 import { Move } from "./libfigureMapper.js";
-import { DancerSetPosition, Hand, Offset, OffsetPlus, OffsetRotate, OffsetTimes, OffsetTranspose, dancerWidth, lineDistance, offsetZero, setDistance, setHeight, setSpacing, setWidth } from "./rendererConstants.js";
+import { DancerSetPosition, Hand, Offset, dancerWidth, lineDistance, setDistance, setHeight, setSpacing, setWidth } from "./rendererConstants.js";
 
 
 export enum SemanticAnimationKind {
@@ -238,7 +238,6 @@ function SemanticToSetPosition(semantic: SemanticPosition): DancerSetPosition {
         case LongLines.Forward:
           position.x *= 0.25;
       }
-      let balanceOffset: Offset = offsetZero;
       if (semantic.balance) {
         if (semantic.facing === Facing.CenterOfCircle) {
           if (semantic.balance === BalanceWeight.Forward) {
@@ -248,40 +247,17 @@ function SemanticToSetPosition(semantic: SemanticPosition): DancerSetPosition {
           }
         } else if ((semantic.facing === Facing.Up || semantic.facing === Facing.Down)
                 && (semantic.balance === BalanceWeight.Backward || semantic.balance === BalanceWeight.Forward)) {
-          balanceOffset = {
+          position = {
-            x: 0,
+            x: position.x,
-            y: position.y * (
+            y: position.y + position.y * (
               semantic.balance === BalanceWeight.Forward
               ? -balanceAmount
               : balanceAmount)
           };
-        } else if ((semantic.facing === Facing.Left || semantic.facing === Facing.Right)
-          && (semantic.balance === BalanceWeight.Backward || semantic.balance === BalanceWeight.Forward)) {
-          balanceOffset = {
-            x: (semantic.balance === BalanceWeight.Forward) === (semantic.facing === Facing.Left)
-              ? -balanceAmount
-              : balanceAmount,
-            y: 0
-          };
-        } else if ((semantic.facing === Facing.Left || semantic.facing === Facing.Right)
-          && (semantic.balance === BalanceWeight.Left || semantic.balance === BalanceWeight.Right)) {
-          balanceOffset = {
-            x: 0,
-            y: (semantic.balance === BalanceWeight.Left) === (semantic.facing === Facing.Left)
-              ? -balanceAmount
-              : balanceAmount
-          };
-        } else if ((semantic.facing === Facing.Up || semantic.facing === Facing.Down)
-          && (semantic.balance === BalanceWeight.Left || semantic.balance === BalanceWeight.Right)) {
-          balanceOffset = {
-            x: (semantic.balance === BalanceWeight.Left) === (semantic.facing === Facing.Up)
-              ? -balanceAmount
-              : balanceAmount,
-            y: 0
-          };
         }
       }
-      position = OffsetPlus(position, balanceOffset, setOffset);
+      position.x += setOffset.x;
+      position.y += setOffset.y;
 
       const isFacingUpOrDown = semantic.facing === Facing.Up || semantic.facing === Facing.Down;
       if (semantic.dancerDistance === DancerDistance.SwingLark) {
@@ -316,12 +292,11 @@ function SemanticToSetPosition(semantic: SemanticPosition): DancerSetPosition {
         // TODO Hands. Might need more info? Or need context of nearby dancer SemanticPositions?
         if (!connection) return undefined;
 
-        const balanceHandAdjustment = OffsetRotate(balanceOffset, -rotation);
         switch (connection.to) {
           case HandTo.DancerLeft:
-            return OffsetPlus({ x: -1, y: 0 }, balanceHandAdjustment);
+            return { x: -1, y: 0 };
           case HandTo.DancerRight:
-            return OffsetPlus({ x: +1, y: 0 }, balanceHandAdjustment);
+            return { x: +1, y: 0 };
           case HandTo.DancerForward:
             if (hand === connection.hand) {
               return { x: 0, y: +0.5 };

www/js/rendererConstants.ts

@@ -1,50 +1,32 @@
-import { DancerIdentity, Rotation } from "./danceCommon";
+import { DancerIdentity } from "./danceCommon";
 
 export interface Offset {
   x: number;
   y: number;
 }
 
-export function OffsetTranspose(a: Offset): Offset {
+export function OffsetPlus(a: Offset, b: Offset) {
-  return { x: a.y, y: a.x };
-}
-
-export function OffsetRotate(a: Offset, r: Rotation): Offset {
-  const rad = degreesToRadians(r);
-  const sin = Math.sin(rad);
-  const cos = Math.cos(rad);
-  return {
-    x: a.x * cos - a.y * sin,
-    y: a.x * sin + a.y * cos,
-  };
-}
-
-function _OffsetPlus(a: Offset, b: Offset): Offset {
   return {
     x: a.x + b.x,
     y: a.y + b.y,
   };
 }
 
-export function OffsetPlus(...args: Offset[]): Offset {
+export function OffsetTimes(a: Offset, b: number) {
-  return args.reduce(_OffsetPlus, offsetZero);
-}
-
-export function OffsetTimes(a: Offset, b: number): Offset {
   return {
     x: a.x * b,
     y: a.y * b,
   };
 }
 
-export function OffsetMinus(a: Offset, b: Offset): Offset {
+export function OffsetMinus(a: Offset, b: Offset) {
   return {
     x: a.x - b.x,
     y: a.y - b.y,
   };
 }
 
-export function OffsetEquals(a: Offset, b: Offset): boolean {
+export function OffsetEquals(a: Offset, b: Offset) {
   return a.x === b.x && a.y === b.y;
 }