ZhongMianAdmin/__test__/bim/js/builders/EllipseBuilder.js

/*
 * EllipseBuilder.js
 *
 * @author realor
 */

import { ObjectBuilder } from './ObjectBuilder.js'
import { ProfileBuilder } from './ProfileBuilder.js'
import { ProfileGeometry } from '../core/ProfileGeometry.js'
import * as THREE from '../lib/three.module.js'

class EllipseBuilder extends ProfileBuilder {
    constructor(xradius = 1, yradius = 0.5, segments = 32) {
        super()
        this.xradius = xradius
        this.yradius = yradius
        this.segments = segments
    }

    performBuild(profile) {
        const shape = new THREE.Shape()

        this.drawEllipse(shape, this.xradius, this.yradius, this.segments)

        profile.updateGeometry(new ProfileGeometry(shape))

        return true
    }

    drawEllipse(path, xradius, yradius, segments) {
        const incr = (2 * Math.PI) / segments

        path.moveTo(xradius, 0)
        for (let rad = incr; rad < 2 * Math.PI; rad += incr) {
            path.lineTo(xradius * Math.cos(rad), yradius * Math.sin(rad))
        }
        path.closePath()
    }

    copy(source) {
        this.xradius = source.xradius
        this.yradius = source.yradius
        this.segments = source.segments

        return this
    }
}

ObjectBuilder.addClass(EllipseBuilder)

export { EllipseBuilder }