ZhongMianAdmin/__test__/bim/js/builders/CircleBuilder.js

/*
 * CircleBuilder.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 CircleBuilder extends ProfileBuilder {
    constructor(radius = 1, segments = 32) {
        super()
        this.radius = radius
        this.segments = segments // segments per turn (360 degrees)
    }

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

        this.drawCircle(shape, this.radius, this.segments)

        profile.updateGeometry(new ProfileGeometry(shape))

        return true
    }

    drawCircle(path, radius = 1, segments = 32) {
        const incr = (2 * Math.PI) / segments

        path.moveTo(radius, 0)
        for (let i = 0; i < segments; i++) {
            let rad = incr * i
            path.lineTo(radius * Math.cos(rad), radius * Math.sin(rad))
        }
        path.closePath()
    }

    copy(source) {
        this.radius = source.radius
        this.segments = source.segments

        return this
    }
}

ObjectBuilder.addClass(CircleBuilder)

export { CircleBuilder }