80 lines
2.8 KiB
JavaScript
80 lines
2.8 KiB
JavaScript
import * as helpers from '../ParseHelpers.js';
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export default class ThreeDface {
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constructor() {
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this.ForEntityName = '3DFACE';
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}
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parseEntity(scanner, curr) {
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const entity = { type: curr.value, vertices: [] };
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curr = scanner.next();
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while (!scanner.isEOF()) {
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if (curr.code === 0)
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break;
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switch (curr.code) {
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case 70: // 1 = Closed shape, 128 = plinegen?, 0 = default
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entity.shape = ((curr.value & 1) === 1);
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entity.hasContinuousLinetypePattern = ((curr.value & 128) === 128);
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break;
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case 10: // X coordinate of point
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entity.vertices = parse3dFaceVertices(scanner, curr);
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curr = scanner.lastReadGroup;
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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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function parse3dFaceVertices(scanner, curr) {
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var vertices = [];
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var vertexIsStarted = false;
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var vertexIsFinished = false;
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var verticesPer3dFace = 4; // there can be up to four vertices per face, although 3 is most used for TIN
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for (let i = 0; i <= verticesPer3dFace; i++) {
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var vertex = {};
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while (!scanner.isEOF()) {
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if (curr.code === 0 || vertexIsFinished)
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break;
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switch (curr.code) {
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case 10: // X0
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case 11: // X1
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case 12: // X2
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case 13: // X3
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if (vertexIsStarted) {
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vertexIsFinished = true;
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continue;
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}
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vertex.x = curr.value;
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vertexIsStarted = true;
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break;
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case 20: // Y
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case 21:
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case 22:
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case 23:
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vertex.y = curr.value;
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break;
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case 30: // Z
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case 31:
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case 32:
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case 33:
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vertex.z = curr.value;
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break;
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default:
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// it is possible to have entity codes after the vertices.
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// So if code is not accounted for return to entity parser where it might be accounted for
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return vertices;
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}
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curr = scanner.next();
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}
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// See https://groups.google.com/forum/#!topic/comp.cad.autocad/9gn8s5O_w6E
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vertices.push(vertex);
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vertexIsStarted = false;
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vertexIsFinished = false;
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}
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scanner.rewind();
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return vertices;
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}
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;
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