58 lines
1.6 KiB
TypeScript
58 lines
1.6 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 IArcEntity extends IEntity {
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center: IPoint;
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radius: number;
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startAngle: number;
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endAngle: number;
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angleLength: number;
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extrusionDirectionX: number;
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extrusionDirectionY: number;
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extrusionDirectionZ: number;
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}
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export default class Arc implements IGeometry {
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public ForEntityName = 'ARC' as const;
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public parseEntity(scanner: DxfArrayScanner, curr: IGroup) {
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const entity = { type: curr.value } as IArcEntity;
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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: // X coordinate of point
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entity.center = helpers.parsePoint(scanner);
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break;
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case 40: // radius
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entity.radius = curr.value as number;
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break;
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case 50: // start angle
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entity.startAngle = Math.PI / 180 * (curr.value as number);
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break;
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case 51: // end angle
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entity.endAngle = Math.PI / 180 * (curr.value as number);
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entity.angleLength = entity.endAngle - entity.startAngle; // angleLength is deprecated
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break;
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case 210:
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entity.extrusionDirectionX = curr.value as number;
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break;
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case 220:
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entity.extrusionDirectionY = curr.value as number;
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break;
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case 230:
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entity.extrusionDirectionZ = curr.value as number;
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break;
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default: // ignored attribute
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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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