task(CAD-2): real hatch patterns - 9 patterns (ANSI31/32/37, NET, GRASS, DOTS, SOLID + legacy), boundary detection, render adapter hatch lines

frontend/src/render/pixi/elementDrawers.ts

@@ -16,6 +16,7 @@
  */
 import type { CADElement } from '../../types/cad.types';
 import { getDimStyle } from '../../services/dimStyleService';
+import { generateHatchLines, computeBoundary, getHatchPattern } from '../../services/hatchPatternService';
 import type { Pt } from '../../tools/modification/geometry';
 
 /** Zeichenprimitiv — kleinste darstellbare Einheit. */
@@ -66,6 +67,62 @@ function arrowPrimitives(x: number, y: number, ang: number, size: number, color:
   }];
 }
 
+/**
+ * Task CAD-2: Hatch-Linien fuer ein Element mit hatch-Properties.
+ * Nutzt hatchPatternService.generateHatchLines mit Boundary aus der
+ * Element-Kontur. Ohne Muster: leeres Array.
+ */
+function hatchPrimitives(el: CADElement, stroke: string): ShapePrimitive[] {
+  const props = el.properties as Record<string, unknown>;
+  if (props.hatch !== true) return [];
+  const patternId = (props.hatchPattern as string | undefined) ?? 'ANSI31';
+  if (!getHatchPattern(patternId)) return [];
+  const spacing = (props.hatchSpacing as number | undefined) ?? 8;
+
+  // Boundary aus Kontur je Elementtyp
+  let bbox: { minX: number; minY: number; maxX: number; maxY: number } | null = null;
+  if (Array.isArray(props.points)) {
+    bbox = computeBoundary(props.points as Array<{ x: number; y: number }>);
+  } else if (el.type === 'circle' || el.type === 'arc') {
+    const r = (props.radius as number | undefined) ?? el.width / 2;
+    bbox = { minX: el.x - r, minY: el.y - r, maxX: el.x + r, maxY: el.y + r };
+  } else {
+    bbox = {
+      minX: el.x - el.width / 2, minY: el.y - el.height / 2,
+      maxX: el.x + el.width / 2, maxY: el.y + el.height / 2,
+    };
+  }
+  if (!bbox) return [];
+
+  const segs = generateHatchLines(patternId, bbox, spacing);
+  const out: ShapePrimitive[] = [];
+  for (const s of segs) {
+    if (s.fill) {
+      const rectPrim: ShapePrimitive = {
+        kind: 'rect',
+        x: (bbox.minX + bbox.maxX) / 2,
+        y: (bbox.minY + bbox.maxY) / 2,
+        w: bbox.maxX - bbox.minX,
+        h: bbox.maxY - bbox.minY,
+        fill: s.fill,
+        stroke,
+        strokeWidth: 1,
+      };
+      out.push(rectPrim);
+    } else {
+      const linePrim: ShapePrimitive = {
+        kind: 'line',
+        from: s.from,
+        to: s.to,
+        stroke,
+        strokeWidth: 0.5,
+      };
+      out.push(linePrim);
+    }
+  }
+  return out;
+}
+
 export function elementToPrimitives(el: CADElement, attrDefs?: Array<{ tag: string; prompt: string; defaultValue?: string }>): ShapePrimitive[] {
   const props = (el.properties ?? {}) as Record<string, unknown>;
   const stroke = (props.stroke as string | undefined) ?? FALLBACK_STROKE;
@@ -90,7 +147,7 @@ export function elementToPrimitives(el: CADElement, attrDefs?: Array<{ tag: stri
 
     case 'rect': {
       // Legacy-BBox-Konvention: x/y ist das Zentrum des Rechtecks
-      return [{
+      const base: ShapePrimitive[] = [{
         kind: 'rect',
         x: el.x - el.width / 2,
         y: el.y - el.height / 2,
@@ -100,11 +157,12 @@ export function elementToPrimitives(el: CADElement, attrDefs?: Array<{ tag: stri
         stroke,
         strokeWidth: sw,
       }];
+      return [...base, ...hatchPrimitives(el, stroke)];
     }
 
     case 'circle': {
       const radius = (props.radius as number | undefined) ?? el.width / 2;
-      return [{
+      const circBase: ShapePrimitive[] = [{
         kind: 'circle',
         center: { x: el.x, y: el.y },
         radius,
@@ -112,6 +170,7 @@ export function elementToPrimitives(el: CADElement, attrDefs?: Array<{ tag: stri
         stroke,
         strokeWidth: sw,
       }];
+      return [...circBase, ...hatchPrimitives(el, stroke)];
     }
 
     case 'arc': {
@@ -133,13 +192,14 @@ export function elementToPrimitives(el: CADElement, attrDefs?: Array<{ tag: stri
         ? (props.points as unknown[]).map(asPoint)
         : [];
       if (pts.length < 2) return [];
-      return [{
+      const polyBase: ShapePrimitive[] = [{
         kind: 'polyline',
         points: pts,
         close: el.type === 'polygon',
         stroke,
         strokeWidth: sw,
       }];
+      return [...polyBase, ...hatchPrimitives(el, stroke)];
     }
 
     case 'text': {