awv3/plugins/dimensions/graphics/angular.js

⚡ AWV3 embedded CAD

import * as THREE from 'three'
import BaseGraphics from './base'

function closestAngle(value, to) {
    const pi2 = 2 * Math.PI
    while (Math.abs(value - pi2 - to) < Math.abs(value - to)) value -= pi2
    while (Math.abs(value + pi2 - to) < Math.abs(value - to)) value += pi2
    return value
}

export default class Angular extends BaseGraphics {
    constructor(...args) {
        super(...args, 2, 2, 2)
    }

    updateFromState(info, ...args) {
        //take local coordinates of four points from CC data members
        let [start, end, dim, corner] = ['startPt', 'endPt', 'dimPt', 'cornerPt'].map(x =>
            new THREE.Vector3().fromArray(info.dimension.members[x].value),
        )
        let extendCrn = info.dimension.members.extendToCorner.value
        //calculate radius & polar angles of the arc
        const radius = corner.distanceTo(dim)
        let startAng = Math.atan2(start.y - corner.y, start.x - corner.x),
            endAng = Math.atan2(end.y - corner.y, end.x - corner.x)
        //arc always goes from "start" to "end" according to "ccw" flag
        if (!info.dimension.members.ccw.value) [start, end, startAng, endAng] = [end, start, endAng, startAng]
        if (endAng < startAng) endAng += 2 * Math.PI
        //check if dim-pos is outside of sector
        let midAng = (startAng + endAng) * 0.5
        let dimAng = Math.atan2(dim.y - corner.y, dim.x - corner.x)
        dimAng = closestAngle(dimAng, midAng)
        const outside = dimAng < startAng || dimAng > endAng
        //set geometry for dimension
        const [startFoot, endFoot] = [start, end].map(x => x.clone().sub(corner).setLength(radius).add(corner))
        const startTang = new THREE.Vector3(Math.sin(startAng), -Math.cos(startAng), 0).multiplyScalar(outside ? -1 : 1)
        const endTang = new THREE.Vector3(-Math.sin(endAng), Math.cos(endAng), 0).multiplyScalar(outside ? -1 : 1)
        this.updateLine(0, extendCrn ? corner : start, startFoot)
        this.updateLine(1, endFoot, extendCrn ? corner : end)
        this.updateArc(0, corner, radius, startAng, dimAng)
        this.updateArc(1, corner, radius, endAng, dimAng)
        this.updateArrow(0, startFoot, startTang)
        this.updateArrow(1, endFoot, endTang)
        super.updateFromState(info, ...args)
    }
}