Pacru: Fix orientation highlighting

Author: Perlkonig

src/common/index.ts

@@ -5,12 +5,12 @@ import { shuffle } from "./shuffle";
 import { UserFacingError } from "./errors";
 import { HexTriGraph, SnubSquareGraph, SquareOrthGraph, SquareDiagGraph, SquareGraph, Square3DGraph, SquareDirectedGraph, SquareFanoronaGraph, BaoGraph, SowingNoEndsGraph } from "./graphs";
 import { wng } from "./namegenerator";
-import { projectPoint, ptDistance, smallestDegreeDiff, normDeg, deg2rad, rad2deg, toggleFacing, calcBearing, matrixRectRot90, matrixRectRotN90, transposeRect, circle2poly, midpoint, distFromCircle, deg2dir, dir2deg } from "./plotting";
+import { projectPoint, ptDistance, smallestDegreeDiff, normDeg, deg2rad, rad2deg, toggleFacing, calcBearing, matrixRectRot90, matrixRectRotN90, transposeRect, circle2poly, midpoint, distFromCircle, deg2dir, dir2deg, rotateFacing } from "./plotting";
 import { hexhexAi2Ap, hexhexAp2Ai, triAi2Ap, triAp2Ai } from "./aiai";
 import stringify from "json-stringify-deterministic";
 import fnv from "fnv-plus";
 
-export { RectGrid, StackSet, reviver, replacer, sortingReplacer, shuffle, UserFacingError, HexTriGraph, SnubSquareGraph, SquareOrthGraph, SquareDiagGraph, SquareGraph, Square3DGraph, SquareDirectedGraph, SquareFanoronaGraph, BaoGraph, SowingNoEndsGraph, wng, projectPoint, ptDistance, smallestDegreeDiff, normDeg, deg2rad, rad2deg, toggleFacing, calcBearing, matrixRectRot90, matrixRectRotN90, transposeRect, hexhexAi2Ap, hexhexAp2Ai, triAi2Ap, triAp2Ai, circle2poly, midpoint, distFromCircle, dir2deg, deg2dir };
+export { RectGrid, StackSet, reviver, replacer, sortingReplacer, shuffle, UserFacingError, HexTriGraph, SnubSquareGraph, SquareOrthGraph, SquareDiagGraph, SquareGraph, Square3DGraph, SquareDirectedGraph, SquareFanoronaGraph, BaoGraph, SowingNoEndsGraph, wng, projectPoint, ptDistance, smallestDegreeDiff, normDeg, deg2rad, rad2deg, toggleFacing, calcBearing, matrixRectRot90, matrixRectRotN90, transposeRect, hexhexAi2Ap, hexhexAp2Ai, triAi2Ap, triAp2Ai, circle2poly, midpoint, distFromCircle, dir2deg, deg2dir, rotateFacing };
 
 export type DirectionCardinal = "N" | "E" | "S" | "W";
 export type DirectionDiagonal = "NE" | "SE" | "SW" | "NW";

src/common/plotting.ts

@@ -24,6 +24,13 @@ export const dir2deg = new Map<Direction, number>([
     ["NW", 315],
 ]);
 
+// Delta is only parsed as a multiple of 45 degrees
+export const rotateFacing = (facing: Direction, delta: number): Direction => {
+    delta = Math.floor(delta / 45) * 45;
+    const newdeg = normDeg(dir2deg.get(facing)! + delta);
+    return deg2dir.get(newdeg)!;
+}
+
 /**
  * Ensures a degree measurement lies [0, 360)
  */

src/games/pacru.ts

@@ -2,7 +2,7 @@ import { GameBase, IAPGameState, IClickResult, IIndividualState, IScores, IStatu
 import { APGamesInformation } from "../schemas/gameinfo";
 import { APRenderRep, RowCol } from "@abstractplay/renderer/src/schemas/schema";
 import { APMoveResult } from "../schemas/moveresults";
-import { deg2dir, dir2deg, Direction, normDeg, oppositeDirections, RectGrid, replacer, reviver, shuffle, smallestDegreeDiff, UserFacingError } from "../common";
+import { deg2dir, dir2deg, Direction, normDeg, oppositeDirections, RectGrid, replacer, reviver, rotateFacing, shuffle, smallestDegreeDiff, UserFacingError } from "../common";
 import i18next from "i18next";
 import { PacruGraph } from "./pacru/graph";
 import { Glyph } from "@abstractplay/renderer/build";
@@ -1126,8 +1126,13 @@ export class PacruGame extends GameBase {
             // orienting first
             if (isOrienting) {
                 // add neighbouring cells
-                for (const cell of g.neighbours(from)) {
-                    this.highlights.push(cell);
+                const {chevron} = this.board.get(from)!;
+                const dirs = [-90, -45, 45, 90].map(d => rotateFacing(chevron!.facing, d));
+                for (const dir of dirs) {
+                    const ray = g.ray(from, dir);
+                    if (ray.length > 0) {
+                        this.highlights.push(ray[0]);
+                    }
                 }
                 const [fx, fy] = g.algebraic2coords(from);
                 if (fx === 0) {