/**
* 교대 벽체·흉벽 삽도 (2026-11-03, 시안 ② 벽체·흉벽 카드): 교대축 직각 단면(① 구간)과 정면·배면도. 순수 문자열 함수.
* 생성본(교대 모델·부재)의 값으로 그린다. 두 그림 모두 가로·세로 축척이 같다(시안 "축척 같음").
*/
export interface AbutWallDrawing {
/** 교대축 길이 L (m), IP1 → IP3. */
lengthM: number;
/** 교좌면 계단 구간 (s, m는 IP1에서), 구간마다 교좌면 EL. */
segments: { sFrom: number; sTo: number; seatEl: number }[];
/** 받침 (s, m), 받침 번호, 패드 상면 z (m), 교좌면 EL (m). */
bearings: { no: number; s: number; z: number; seatEl: number }[];
footingTopEl: number;
footingBottomEl: number;
/** 흉벽 상단 EL at s = 0 (IP1 끝) and s = L (IP3 끝). */
parapetTopStartEl: number;
parapetTopEndEl: number;
/** t (m, 전면 +): 벽체 전면, 흉벽 배면, 벽체 배면, 저판 앞굽 끝·뒷굽 끝. */
wallFrontM: number;
parapetBackM: number;
wallBackM: number;
footingFrontM: number;
footingBackM: number;
bracketHeightM: number;
shrinkJointCount: number;
/** 시안 치수 줄 "브라켓 폭 + 흉벽 두께 + 교좌면 폭 = 벽체 두께" (mm). */
bracketWidthMm: number;
parapetThicknessMm: number;
seatWidthMm: number;
}
const INK = '#18212b';
const MUTED = '#55606e';
const CONC = '#d9c9a8';
const CONC_DARK = '#c7b48d';
const FOOT = '#b9c3ce';
const t3 = (v: number) => v.toFixed(3);
/** EL 표기 (2026-11-04): "EL.41.995". */
const el = (v: number) => `EL.${v.toFixed(3)}`;
const label = (x: number, y: number, s: string, anchor = 'middle', fill = INK) =>
`${s}`;
const poly = (pts: [number, number][], style: string) => ``;
/** 흉벽 상단 EL at s (linear between the two ends). */
function parapetTopAt(d: AbutWallDrawing, s: number): number {
return d.parapetTopStartEl + ((d.parapetTopEndEl - d.parapetTopStartEl) * s) / d.lengthM;
}
/**
* 교대축 직각 단면 (① 구간 = 받침 1번이 놓인 구간): 저판, 벽체(기초 상면 ~ 교좌면), 흉벽 배면 단차부(브라켓 상면까지),
* 흉벽(흉벽 상단까지), 받침 블럭. 왼쪽이 배면, 오른쪽이 전면.
*/
export function abutWallSectionSvg(d: AbutWallDrawing): string {
const b1 = d.bearings.find((b) => b.no === 1) ?? d.bearings[0];
const seg = d.segments.find((g) => b1.s >= g.sFrom && b1.s <= g.sTo) ?? d.segments[0];
const sAt = b1.s;
const top = parapetTopAt(d, sAt);
const bracket = top - d.bracketHeightM;
const k = 46; // px per m, both directions
const tMin = d.footingBackM - 0.6;
const elMax = top + 0.7;
const X = (t: number) => (t - tMin) * k;
const Y = (el: number) => (elMax - el) * k + 10;
const W = (d.footingFrontM + 1.4 - tMin) * k;
const H = Y(d.footingBottomEl) + 40;
const rect = (t0: number, t1: number, e0: number, e1: number, style: string) =>
poly([[X(t0), Y(e0)], [X(t1), Y(e0)], [X(t1), Y(e1)], [X(t0), Y(e1)]], style);
const halfBlock = 0.6;
const blockT = (d.wallFrontM + 0) / 2; // drawn at the middle of the 교좌면 width
return [
`',
].join('');
}
/**
* 정면·배면도: 교좌면 계단(구간별 교좌면 EL), 흉벽 상단 경사, 받침 블럭, 수축줄눈, 저판. 왼쪽 IP3(① 쪽), 오른쪽 IP1.
*/
export function abutWallElevationSvg(d: AbutWallDrawing): string {
const k = 46;
const top = Math.max(d.parapetTopStartEl, d.parapetTopEndEl);
const elMax = top + 0.6;
const pad = 40;
const X = (s: number) => pad + (d.lengthM - s) * k; // IP3 (s = L) on the left
const Y = (el: number) => (elMax - el) * k + 10;
const W = d.lengthM * k + 2 * pad;
const H = Y(d.footingBottomEl) + 40;
const parts: string[] = [];
parts.push(poly([[X(d.lengthM), Y(d.footingTopEl)], [X(0), Y(d.footingTopEl)], [X(0), Y(d.footingBottomEl)], [X(d.lengthM), Y(d.footingBottomEl)]], `fill="${FOOT}" stroke="${MUTED}"`));
// 흉벽 (behind) from the 교좌면 steps up to the sloped top line.
parts.push(poly([[X(d.lengthM), Y(d.footingTopEl)], [X(0), Y(d.footingTopEl)], [X(0), Y(d.parapetTopStartEl)], [X(d.lengthM), Y(d.parapetTopEndEl)]], `fill="${CONC_DARK}" stroke="${MUTED}"`));
// 벽체 front: one block per 교좌면 step.
for (const g of d.segments) {
parts.push(poly([[X(g.sTo), Y(d.footingTopEl)], [X(g.sFrom), Y(d.footingTopEl)], [X(g.sFrom), Y(g.seatEl)], [X(g.sTo), Y(g.seatEl)]], `fill="${CONC}" stroke="${MUTED}"`));
}
for (const b of d.bearings) {
parts.push(poly([[X(b.s + 0.6), Y(b.seatEl)], [X(b.s - 0.6), Y(b.seatEl)], [X(b.s - 0.6), Y(b.z)], [X(b.s + 0.6), Y(b.z)]], `fill="#9aa7b5" stroke="${INK}"`));
parts.push(label(X(b.s), Y(b.z) - 6, ['①', '②', '③', '④', '⑤', '⑥', '⑦', '⑧'][b.no - 1] ?? String(b.no)));
}
for (let j = 1; j <= d.shrinkJointCount; j++) {
const s = (d.lengthM * j) / (d.shrinkJointCount + 1);
parts.push(``);
parts.push(label(X(s) + 4, Y(d.footingTopEl) - 8, `수축줄눈 ${j}`, 'start'));
}
const first = d.segments.find((g) => d.lengthM >= g.sFrom && d.lengthM <= g.sTo) ?? d.segments[d.segments.length - 1];
const last = d.segments.find((g) => g.sFrom <= 0 && g.sTo >= 0) ?? d.segments[0];
parts.push(label(X(d.lengthM), Y(d.parapetTopEndEl) - 6, el(d.parapetTopEndEl), 'start'));
parts.push(label(X(0), Y(d.parapetTopStartEl) - 6, el(d.parapetTopStartEl), 'end'));
parts.push(label(X(d.lengthM) - 4, Y(first.seatEl) + 4, el(first.seatEl), 'end'));
parts.push(label(X(0) + 4, Y(last.seatEl) + 4, el(last.seatEl), 'start'));
parts.push(label(X(d.lengthM) - 4, Y(d.footingBottomEl) + 4, el(d.footingBottomEl), 'end'));
parts.push(label(X(d.lengthM), H - 8, 'IP3', 'middle', MUTED));
parts.push(label(X(0), H - 8, 'IP1', 'middle', MUTED));
parts.push(label((X(0) + X(d.lengthM)) / 2, H - 8, `${d.lengthM.toFixed(3)} m`));
return [
`',
].join('');
}