ZhongMianAdmin/__test__/bim/js/builders/CircularSectorBuilder.js

/*
 * CircularSectorBuilder.js
 *
 * @author realor
 */

import { CircleBuilder } from './CircleBuilder.js'
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 CircularSectorBuilder extends CircleBuilder {
    constructor(radius = 1, angle = 180, segments = 32) {
        super(radius, segments)
        this.angle = angle
    }

    performBuild(profile) {
        if (this.angle < 0) throw 'Unsupported negative angle'

        const shape = new THREE.Shape()

        if (this.angle >= 360) {
            this.drawCircle(shape, this.radius, this.segments)
        } else {
            this.drawSector(shape, this.radius, this.angle, this.segments)
        }

        profile.updateGeometry(new ProfileGeometry(shape))

        return true
    }

    drawSector(path, radius = 1, angle = 180, segments = 32) {
        const steps = Math.ceil((segments * angle) / 360)
        const angleRad = THREE.MathUtils.degToRad(angle)
        const incr = angleRad / steps

        path.moveTo(0, 0)
        for (let i = 0; i <= steps; 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
        this.angle = source.angle

        return this
    }
}

ObjectBuilder.addClass(CircularSectorBuilder)

export { CircularSectorBuilder }