SPipe 데모 v2 (2026-10-30) 서버 배포본

- SPipe_server_2026-10-30.zip 내용을 풀어서 등록 (압축 파일은 올리지 않음)
- README에 데모 v2 서버 업데이트 순서 추가, 저장소에 없는 문서 목차 정리
- 패치내역을 docs/로 이동, _worklog.md 추가
- 임시 파일(backend/temp.*)과 API 키가 든 파일은 제외

src/dxfExport.ts

@@ -0,0 +1,178 @@
+import type { NetworkModel } from './inpModel';
+import type { SimulationResult } from './types';
+
+interface DxfExportOptions {
+  model: NetworkModel;
+  simulationResult?: SimulationResult | null;
+  scenarioName?: string;
+}
+
+/**
+ * Generates an AutoCAD ASCII DXF (R12 / AC1009) format drawing file
+ * with organized CAD layers for pipes, nodes, text labels, and hydraulic results.
+ */
+export function generateDxf({
+  model,
+  simulationResult,
+  scenarioName = 'Baseline',
+}: DxfExportOptions): string {
+  const lines: string[] = [];
+
+  const add = (...tokens: (string | number)[]) => {
+    for (const t of tokens) {
+      lines.push(String(t));
+    }
+  };
+
+  // Compute model extents to determine appropriate text height and circle radius
+  let minX = Infinity, minY = Infinity, maxX = -Infinity, maxY = -Infinity;
+  for (const n of Object.values(model.nodes)) {
+    if (n.x < minX) minX = n.x;
+    if (n.y < minY) minY = n.y;
+    if (n.x > maxX) maxX = n.x;
+    if (n.y > maxY) maxY = n.y;
+  }
+  if (minX === Infinity) {
+    minX = 0; minY = 0; maxX = 100; maxY = 100;
+  }
+
+  const modelSpan = Math.max(maxX - minX, maxY - minY) || 100;
+  const textHeight = Math.max(0.5, Math.round((modelSpan * 0.015) * 10) / 10);
+  const nodeRadius = Math.max(0.6, Math.round((modelSpan * 0.018) * 10) / 10);
+
+  // 1. HEADER SECTION
+  add('0', 'SECTION');
+  add('2', 'HEADER');
+  add('9', '$ACADVER', '1', 'AC1009'); // AutoCAD Release 12 DXF standard
+  add('9', '$INSUNITS', '70', '6');   // Meters (or Unitless)
+  add('0', 'ENDSEC');
+
+  // 2. TABLES SECTION (Standard Engineering Layer Definitions)
+  add('0', 'SECTION');
+  add('2', 'TABLES');
+  add('0', 'TABLE');
+  add('2', 'LAYER');
+  add('70', '7');
+
+  const defineLayer = (name: string, color: number) => {
+    add('0', 'LAYER');
+    add('2', name);
+    add('70', '0');
+    add('62', color); // AutoCAD ACI Color
+    add('6', 'CONTINUOUS');
+  };
+
+  defineLayer('PIPE', 4);           // Cyan
+  defineLayer('PIPE_TEXT', 3);      // Green (ID, Dia, Len)
+  defineLayer('PIPE_FLOW', 2);      // Yellow (Q, V)
+  defineLayer('NODE', 1);           // Red
+  defineLayer('NODE_TEXT', 7);      // White/Black (ID, Elev)
+  defineLayer('NODE_PRESS', 5);     // Blue (P)
+  defineLayer('FACILITY', 6);       // Magenta (Reservoir, Tank)
+
+  add('0', 'ENDTAB');
+  add('0', 'ENDSEC');
+
+  // 3. BLOCKS SECTION (Empty but required)
+  add('0', 'SECTION');
+  add('2', 'BLOCKS');
+  add('0', 'ENDSEC');
+
+  // 4. ENTITIES SECTION
+  add('0', 'SECTION');
+  add('2', 'ENTITIES');
+
+  // Title Text entity
+  add('0', 'TEXT');
+  add('8', 'NODE_TEXT');
+  add('10', minX, '20', maxY + textHeight * 3, '30', '0.0');
+  add('40', textHeight * 1.5);
+  add('1', `spipe Network Drawing - ${scenarioName}`);
+  add('50', '0.0');
+
+  // A. Export Nodes (Junctions, Reservoirs, Tanks)
+  for (const node of Object.values(model.nodes)) {
+    const isFacility = node.type === 'RESERVOIR' || node.type === 'TANK';
+    const layer = isFacility ? 'FACILITY' : 'NODE';
+    const r = isFacility ? nodeRadius * 1.6 : nodeRadius;
+
+    // Node Circle entity
+    add('0', 'CIRCLE');
+    add('8', layer);
+    add('10', node.x.toFixed(3), '20', node.y.toFixed(3), '30', '0.0');
+    add('40', r.toFixed(3));
+
+    // Node ID and Elevation Text entity
+    const elevStr = `EL.${node.elevation.toFixed(1)}`;
+    add('0', 'TEXT');
+    add('8', 'NODE_TEXT');
+    add('10', (node.x + r * 1.2).toFixed(3), '20', (node.y + r * 0.4).toFixed(3), '30', '0.0');
+    add('40', textHeight.toFixed(3));
+    add('1', `${node.id} (${elevStr})`);
+    add('50', '0.0');
+
+    // Hydraulic Pressure Text entity
+    if (simulationResult) {
+      const res = simulationResult.nodes[node.id];
+      if (res) {
+        const pressUnit = simulationResult.units.pressure;
+        const pressStr = `P=${res.pressure.toFixed(1)}${pressUnit}`;
+        add('0', 'TEXT');
+        add('8', 'NODE_PRESS');
+        add('10', (node.x + r * 1.2).toFixed(3), '20', (node.y - r * 1.0).toFixed(3), '30', '0.0');
+        add('40', (textHeight * 0.9).toFixed(3));
+        add('1', pressStr);
+        add('50', '0.0');
+      }
+    }
+  }
+
+  // B. Export Pipes and Pumps
+  for (const pipe of Object.values(model.pipes)) {
+    const n1 = model.nodes[pipe.node1];
+    const n2 = model.nodes[pipe.node2];
+    if (!n1 || !n2) continue;
+
+    // Pipe Line entity
+    add('0', 'LINE');
+    add('8', 'PIPE');
+    add('10', n1.x.toFixed(3), '20', n1.y.toFixed(3), '30', '0.0');
+    add('11', n2.x.toFixed(3), '21', n2.y.toFixed(3), '31', '0.0');
+
+    // Pipe Midpoint and Angle
+    const midX = (n1.x + n2.x) / 2;
+    const midY = (n1.y + n2.y) / 2;
+    let angleDeg = Math.atan2(n2.y - n1.y, n2.x - n1.x) * (180 / Math.PI);
+    if (angleDeg < -90) angleDeg += 180;
+    if (angleDeg > 90) angleDeg -= 180;
+
+    // Pipe Annotation Text: ID, Diameter, Length
+    const diaStr = `D${pipe.diameter}`;
+    const lenStr = `L${Math.round(pipe.length)}`;
+    add('0', 'TEXT');
+    add('8', 'PIPE_TEXT');
+    add('10', midX.toFixed(3), '20', (midY + textHeight * 0.4).toFixed(3), '30', '0.0');
+    add('40', (textHeight * 0.85).toFixed(3));
+    add('1', `${pipe.id}:${diaStr}-${lenStr}`);
+    add('50', angleDeg.toFixed(1));
+
+    // Hydraulic Flow and Velocity Text entity
+    if (simulationResult) {
+      const res = simulationResult.links[pipe.id];
+      if (res) {
+        const flowStr = `Q=${res.flow.toFixed(1)} V=${res.velocity.toFixed(2)}`;
+        add('0', 'TEXT');
+        add('8', 'PIPE_FLOW');
+        add('10', midX.toFixed(3), '20', (midY - textHeight * 1.2).toFixed(3), '30', '0.0');
+        add('40', (textHeight * 0.75).toFixed(3));
+        add('1', flowStr);
+        add('50', angleDeg.toFixed(1));
+      }
+    }
+  }
+
+  add('0', 'ENDSEC');
+  add('0', 'EOF');
+
+  return lines.join('\r\n');
+}