dxf-parser
Version:
Parse dxf files into a readable, logical js object.
89 lines (88 loc) • 3.22 kB
JavaScript
import * as helpers from '../ParseHelpers';
import VertexParser from './vertex';
export default class Polyline {
constructor() {
this.ForEntityName = 'POLYLINE';
}
parseEntity(scanner, curr) {
var entity = { type: curr.value, vertices: [] };
curr = scanner.next();
while (!scanner.isEOF()) {
if (curr.code === 0)
break;
switch (curr.code) {
case 10: // always 0
break;
case 20: // always 0
break;
case 30: // elevation
break;
case 39: // thickness
entity.thickness = curr.value;
break;
case 40: // start width
break;
case 41: // end width
break;
case 70:
entity.shape = (curr.value & 1) !== 0;
entity.includesCurveFitVertices = (curr.value & 2) !== 0;
entity.includesSplineFitVertices = (curr.value & 4) !== 0;
entity.is3dPolyline = (curr.value & 8) !== 0;
entity.is3dPolygonMesh = (curr.value & 16) !== 0;
entity.is3dPolygonMeshClosed = (curr.value & 32) !== 0; // 32 = The polygon mesh is closed in the N direction
entity.isPolyfaceMesh = (curr.value & 64) !== 0;
entity.hasContinuousLinetypePattern = (curr.value & 128) !== 0;
break;
case 71: // Polygon mesh M vertex count
break;
case 72: // Polygon mesh N vertex count
break;
case 73: // Smooth surface M density
break;
case 74: // Smooth surface N density
break;
case 75: // Curves and smooth surface type
break;
case 210:
entity.extrusionDirection = helpers.parsePoint(scanner);
break;
default:
helpers.checkCommonEntityProperties(entity, curr, scanner);
break;
}
curr = scanner.next();
}
entity.vertices = parsePolylineVertices(scanner, curr);
return entity;
}
}
function parsePolylineVertices(scanner, curr) {
const vertexParser = new VertexParser();
const vertices = [];
while (!scanner.isEOF()) {
if (curr.code === 0) {
if (curr.value === 'VERTEX') {
vertices.push(vertexParser.parseEntity(scanner, curr));
curr = scanner.lastReadGroup;
}
else if (curr.value === 'SEQEND') {
parseSeqEnd(scanner, curr);
break;
}
}
}
return vertices;
}
function parseSeqEnd(scanner, curr) {
const entity = { type: curr.value };
curr = scanner.next();
while (!scanner.isEOF()) {
if (curr.code == 0)
break;
helpers.checkCommonEntityProperties(entity, curr, scanner);
curr = scanner.next();
}
return entity;
}
;