fix(abut): 날개벽의 연직 헌치 삭제

- 위 연직 헌치(흉벽 배면)와 아래 연직 헌치(벽체 배면) 삭제. 관련 코드와 Haunch 타입 제거
- 저판 상면 헌치는 유지
- 테스트 갱신. 전체 637건 통과, 타입 검사·빌드 통과. 브라우저 시각 확인은 미실시

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

src/core/abut/wings.ts

@@ -38,8 +38,6 @@ export interface WingSolid {
   topLine: { dM: number; el: number }[];
   /** 하단선: 저판 상면 → 뒷굽 끝 → 단부 하단 (일반형), 또는 저판 상면 평탄 (단축형). */
   bottomLine: { dM: number; el: number }[];
-  /** 헌치 300 × 300 (위 헌치, 흉벽 배면 모서리). 평면 삼각형과 높이 범위. */
-  haunches: Haunch[];
   /**
    * 저판 상면 헌치 (수평, 2026-11-03): between the 저판 상면 and the 날개벽 내측면. The triangle lies in the plane EL–s,
    * with legs HAUNCH_LEG_M along the 저판 상면 and along the 내측면; it runs along the wing from dMFrom (벽체 배면) to dMTo (뒷굽).
@@ -56,14 +54,6 @@ export interface WingBand {
   zBottomEl: number;
 }
 
-export interface Haunch {
-  kind: 'upper' | 'lower';
-  /** 평면 삼각형 꼭짓점 (E, N): 모서리, 날개벽 쪽 점, 벽체·흉벽 쪽 점. */
-  corners: [AbutPoint, AbutPoint, AbutPoint];
-  zBottomEl: number;
-  zTopEl: number;
-}
-
 export const HAUNCH_LEG_M = 0.3;
 
 export function buildWings(model: AbutModel, members: AbutMembers, forms?: { left: WingForm; right: WingForm }): WingSolid[] {
@@ -111,28 +101,6 @@ export function buildWings(model: AbutModel, members: AbutMembers, forms?: { lef
             { dM: WING_LENGTH_M, el: form === 'general' ? bottomEnd : footingTop },
           ];
 
-    // 헌치: 위 헌치는 흉벽 배면(−0.5), 아래 헌치는 벽체 배면(−0.8)의 모서리에 둔다.
-    const pointAt = (d: number) => ({ e: p0.e + w.e * d, n: p0.n + w.n * d });
-    const shift = (q: AbutPoint, v: AbutPoint, f: number) => ({ e: q.e + v.e * f, n: q.n + v.n * f });
-    const bracketTop = topStart - members.shape.bracketHeightM;
-    // The 브라켓 상면 falls along s (the 흉벽 top slopes), so the upper haunch rests on the highest point of its own footprint.
-    const sAt = (q: AbutPoint) => (q.e - model.ip1.e) * model.u.e + (q.n - model.ip1.n) * model.u.n;
-    const backTopAt = (s: number) => members.parapetTopStartEl + ((members.parapetTopEndEl - members.parapetTopStartEl) * s) / model.length - members.shape.bracketHeightM;
-    const haunchAt = (kind: 'upper' | 'lower', t: number): Haunch => {
-      const d = Math.abs(t) / k;
-      const c = pointAt(d);
-      const inwardUnit = { e: model.u.e * a, n: model.u.n * a };
-      const corners: [AbutPoint, AbutPoint, AbutPoint] = [c, shift(c, w, HAUNCH_LEG_M), shift(c, inwardUnit, HAUNCH_LEG_M)];
-      return {
-        kind,
-        corners,
-        zBottomEl: kind === 'upper' ? Math.max(...corners.map((q) => backTopAt(sAt(q)))) : footingTop,
-        zTopEl: kind === 'upper' ? topAt(d) : bracketTop,
-      };
-    };
-    // 연직 헌치 (2026-11-03, 내측면 모서리): upper at the 흉벽 배면, lower at the 벽체 배면.
-    const haunches = [haunchAt('upper', members.shape.parapetBackM), haunchAt('lower', members.shape.wallBackM)];
-
     // 저판 상면 헌치 (수평): from the 벽체 배면 to the 뒷굽, on the 저판 상면 next to the 날개벽 내측면.
     const footingHaunch = {
       dMFrom: Math.abs(members.shape.wallBackM) / k,
@@ -163,7 +131,6 @@ export function buildWings(model: AbutModel, members: AbutMembers, forms?: { lef
       heelDistanceM,
       topLine,
       bottomLine,
-      haunches,
       footingHaunch,
       bands,
     };

src/view/abut-scene.ts

@@ -293,15 +293,6 @@ export function buildAbutGroup(
       const origin = new THREE.Vector3(sEnd + a * WING_THICKNESS_M + dir.ws * f.dMFrom, f.el, dir.wt * f.dMFrom);
       add('haunches', prism(triangle, f.dMTo - f.dMFrom, origin, new THREE.Vector3(a, 0, 0), ey, new THREE.Vector3(dir.ws, 0, dir.wt)), 0xc9a77c);
     }
-    for (const h of wing.haunches) {
-      const shape: [number, number][] = h.corners.map((c) => {
-        const p = toAxis(model, c);
-        return [p.s, p.t];
-      });
-      const zBottom = h.zBottomEl;
-      const height = h.zTopEl - h.zBottomEl;
-      if (height > 0) add('haunches', prism(shape, height, new THREE.Vector3(0, zBottom, 0), ex, ez, ey), 0xc9a77c);
-    }
   }
 
   // 지형: when the ground model's terrain grid covers the abutment footprint, the terrain is drawn (the same frame as the

tests/abut-blocks-slab.test.ts

@@ -89,13 +89,8 @@ describe('교대 3D: 받침블럭과 접속슬래브 (spec §4.2, §4.8)', () =>
     for (const w of (named('wall') as THREE.Group).children) expect(new THREE.Box3().setFromObject(w).min.z).toBeGreaterThanOrEqual(members.shape.wallBackM - 1e-6);
   });
 
-  it('the upper 헌치 and the 접속슬래브 stay on the 브라켓 상면 over the back strip, not in it', () => {
+  it('the 접속슬래브 stays on the 브라켓 상면 over the back strip, not in it', () => {
     const backTop = (s: number) => members.parapetTopStartEl + ((members.parapetTopEndEl - members.parapetTopStartEl) * s) / model.length - members.shape.bracketHeightM;
-    for (const h of (named('haunches') as THREE.Group).children) {
-      const b = new THREE.Box3().setFromObject(h);
-      if (b.max.z < members.shape.parapetBackM + 1e-6) continue; // lower 헌치, behind the 벽체
-      expect(b.min.y).toBeGreaterThanOrEqual(Math.max(backTop(b.min.x), backTop(b.max.x)) - 1e-6);
-    }
     const pos = ((named('slab') as THREE.Group).children[0] as THREE.Mesh).geometry.getAttribute('position');
     for (let i = 0; i < pos.count; i++) {
       if (pos.getZ(i) >= members.shape.wallBackM) expect(pos.getY(i)).toBeGreaterThanOrEqual(backTop(pos.getX(i)) - 1e-6);

tests/abut-scene.test.ts

@@ -21,13 +21,13 @@ const group = buildAbutGroup(model, members, wings);
 const count = (name: string) => (group.getObjectByName(name) as THREE.Group | undefined)?.children.length ?? 0;
 
 describe('교대 A1 3D 장면 (AA3·AA3b·AA3c)', () => {
-  it('has the members: 5 wall blocks, 10 parapet parts (2 per step), 1 footing, 18 piles, 2 wings, 6 haunches', () => {
+  it('has the members: 5 wall blocks, 10 parapet parts (2 per step), 1 footing, 18 piles, 2 wings, 2 haunches (저판 상면)', () => {
     expect(count('wall')).toBe(5); // one 벽체 block per 교좌면 step (삽도)
     expect(count('parapet')).toBe(10); // per step: back strip (흉벽 배면 단차) and the 흉벽 (삽도)
     expect(count('footing')).toBe(1);
     expect(count('piles')).toBe(18);
     expect(count('wings')).toBe(4); // upper and lower part per wing
-    expect(count('haunches')).toBe(6); // per wing: upper and lower 연직 헌치, and the 저판 상면 헌치
+    expect(count('haunches')).toBe(2); // per wing: the 저판 상면 헌치
   });
 
   it('spans from the pile tip (19.295 m) up to the highest parapet end (47.18 m)', () => {

tests/abut-wings.test.ts

@@ -117,15 +117,6 @@ describe('교대 날개벽 하단 선 · 헌치 (AA3c, spec_abut §4.7)', () =>
     expect(line[2].el).toBeCloseTo(45.214, 2);
   });
 
-  it('two vertical 300 × 300 haunches at the 내측면 corners: upper at the 흉벽 배면, lower at the 벽체 배면', () => {
-    expect(a2Left.haunches.map((h) => h.kind)).toEqual(['upper', 'lower']);
-    for (const h of a2Left.haunches) {
-      const [c0, c1, c2] = h.corners;
-      expect(Math.hypot(c1.e - c0.e, c1.n - c0.n)).toBeCloseTo(0.3, 6);
-      expect(Math.hypot(c2.e - c0.e, c2.n - c0.n)).toBeCloseTo(0.3, 6);
-    }
-  });
-
   it('the 저판 상면 haunch runs from the 벽체 배면 to the 뒷굽 on the 저판 상면; the 뒷굽 haunch is gone', () => {
     const f = a2Left.footingHaunch!;
     expect(f.el).toBeCloseTo(41.995, 3);
@@ -133,15 +124,6 @@ describe('교대 날개벽 하단 선 · 헌치 (AA3c, spec_abut §4.7)', () =>
     expect((a2Left as { heelHaunch?: unknown }).heelHaunch).toBeUndefined();
   });
 
-  it('upper haunch runs from the bracket top (흉벽 상단 − 0.85) to the wing top', () => {
-    const [up, low] = a2Left.haunches;
-    // The upper haunch rests on the highest point of the 브라켓 top over its footprint (the top falls along s), never below it.
-    expect(up.zBottomEl).toBeGreaterThanOrEqual(46.838 - 0.85 - 1e-6);
-    expect(up.zBottomEl).toBeLessThan(46.838 - 0.85 + 0.05);
-    expect(up.zTopEl).toBeGreaterThan(up.zBottomEl);
-    expect(low.zBottomEl).toBeCloseTo(41.995, 3);
-    expect(low.zTopEl).toBeCloseTo(46.838 - 0.85, 2);
-  });
 });
 
 describe('날개벽 수평 단 (QA-12 초안 적용, spec_abut §4.7)', () => {