feat(All):Initial

2025-10-04 23:36:07 +08:00
commit 2b4e5d2668
1321 changed files with 415958 additions and 0 deletions
@@ -0,0 +1,48 @@
+
+import DxfArrayScanner, { IGroup } from '../DxfArrayScanner';
+import * as helpers from '../ParseHelpers'
+import IGeometry, { IEntity, IPoint } from './geomtry';
+
+export interface ICircleEntity extends IEntity {
+	center: IPoint;
+	radius: number;
+	startAngle: number;
+	endAngle: number;
+	angleLength: number;
+}
+
+export default class Circle implements IGeometry {
+	public ForEntityName = 'CIRCLE' as const;
+	public parseEntity(scanner: DxfArrayScanner, curr: IGroup) {
+		const entity = { type: curr.value } as ICircleEntity;
+		curr = scanner.next();
+		while (!scanner.isEOF()) {
+			if (curr.code === 0) break;
+
+			switch (curr.code) {
+				case 10: // X coordinate of point
+					entity.center = helpers.parsePoint(scanner);
+					break;
+				case 40: // radius
+					entity.radius = (curr.value as number);
+					break;
+				case 50: // start angle
+					entity.startAngle = Math.PI / 180 * (curr.value as number);
+					break;
+				case 51: // end angle
+					const endAngle = Math.PI / 180 * (curr.value as number);
+					if (endAngle < entity.startAngle)
+						entity.angleLength = endAngle + 2 * Math.PI - entity.startAngle;
+					else
+						entity.angleLength = endAngle - entity.startAngle;
+					entity.endAngle = endAngle;
+					break;
+				default: // ignored attribute
+					helpers.checkCommonEntityProperties(entity, curr, scanner);
+					break;
+			}
+			curr = scanner.next();
+		}
+		return entity;
+	}
+}