87 lines
2.3 KiB
TypeScript
87 lines
2.3 KiB
TypeScript
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import DxfArrayScanner, { IGroup } from '../DxfArrayScanner';
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import * as helpers from '../ParseHelpers'
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import IGeometry, { IEntity, IPoint } from './geomtry';
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export interface ISplineEntity extends IEntity {
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controlPoints?: IPoint[];
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fitPoints?: IPoint[];
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startTangent: IPoint;
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endTangent: IPoint;
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knotValues: number[];
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closed: boolean;
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periodic: boolean;
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rational: boolean;
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planar: boolean;
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linear: boolean;
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degreeOfSplineCurve: number;
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numberOfKnots: number;
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numberOfControlPoints: number;
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numberOfFitPoints: number;
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normalVector: IPoint;
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}
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export default class Spline implements IGeometry {
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public ForEntityName = 'SPLINE' as const;
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public parseEntity(scanner: DxfArrayScanner, curr: IGroup) {
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const entity = { type: curr.value } as ISplineEntity;
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curr = scanner.next();
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while (!scanner.isEOF()) {
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if (curr.code === 0) break;
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switch (curr.code) {
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case 10:
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if (!entity.controlPoints) entity.controlPoints = [];
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entity.controlPoints.push(helpers.parsePoint(scanner));
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break;
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case 11:
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if (!entity.fitPoints) entity.fitPoints = [];
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entity.fitPoints.push(helpers.parsePoint(scanner));
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break;
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case 12:
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entity.startTangent = helpers.parsePoint(scanner);
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break;
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case 13:
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entity.endTangent = helpers.parsePoint(scanner);
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break;
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case 40:
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if (!entity.knotValues) entity.knotValues = [];
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entity.knotValues.push(curr.value as number);
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break;
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case 70:
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if (((curr.value as number) & 1) != 0) entity.closed = true;
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if (((curr.value as number) & 2) != 0) entity.periodic = true;
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if (((curr.value as number) & 4) != 0) entity.rational = true;
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if (((curr.value as number) & 8) != 0) entity.planar = true;
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if (((curr.value as number) & 16) != 0) {
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entity.planar = true;
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entity.linear = true;
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}
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break;
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case 71:
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entity.degreeOfSplineCurve = curr.value as number;
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break;
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case 72:
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entity.numberOfKnots = curr.value as number;
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break;
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case 73:
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entity.numberOfControlPoints = curr.value as number;
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break;
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case 74:
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entity.numberOfFitPoints = curr.value as number;
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break;
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case 210:
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entity.normalVector = helpers.parsePoint(scanner);
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break;
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default:
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helpers.checkCommonEntityProperties(entity, curr, scanner);
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break;
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}
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curr = scanner.next();
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}
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return entity;
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}
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}
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