dxf-viewer/src/parser/entities/circle.js

JavaScript DXF file viewer

import * as helpers from "../ParseHelpers.js"

export default function EntityParser() {}

EntityParser.ForEntityName = 'CIRCLE';

EntityParser.prototype.parseEntity = function(scanner, curr) {
    var entity, endAngle;
    entity = { type: curr.value };
    curr = scanner.next();
    while(curr !== 'EOF') {
        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;
            break;
        case 50: // start angle
            entity.startAngle = Math.PI / 180 * curr.value;
            break;
        case 51: // end angle
            endAngle = Math.PI / 180 * curr.value;
            if(endAngle < entity.startAngle)
                entity.angleLength = endAngle + 2 * Math.PI - entity.startAngle;
            else
                entity.angleLength = endAngle - entity.startAngle;
            entity.endAngle = endAngle;
            break;
        case 210:
            entity.extrusionDirection = helpers.parsePoint(scanner);
            break;
        default: // ignored attribute
            helpers.checkCommonEntityProperties(entity, curr, scanner);
            break;
        }
        curr = scanner.next();
    }
    return entity;
};