穴テンプレートのトーラスを考える3

誤った結果となる原因の一つの
"円弧の始点終点では無く、穴の軸方向を元に三次元座標の上下で判断"
を組み込みつつ、出力結果を下6桁に修正しました。

# Fusion360API Python script

import traceback
import adsk.core as core
import adsk.fusion as fusion

def run(context):
    ui: core.UserInterface = None
    try:
        app: core.Application = core.Application.get()
        ui = app.userInterface

        msg: str = 'Select'
        selFilter: str = 'ToroidalFaces'
        sel: core.Selection = select_ent(msg, selFilter)
        if not sel:
            return

        face: fusion.BRepFace = sel.entity
        eva: core.SurfaceEvaluator = face.evaluator
        prmBox: core.BoundingBox2D = eva.parametricRange()
        midPrm: core.Point2D = core.Point2D.create(
            (prmBox.minPoint.x + prmBox.maxPoint.x) * 0.5,
            (prmBox.minPoint.y + prmBox.maxPoint.y) * 0.5,
        )

        for isU in (True, False):
            arc: core.Arc3D = core.Arc3D.cast(
                eva.getIsoCurve(midPrm.x, isU)[0]
            )
            if arc: break

        if not arc: return

        torus: core.Torus = face.geometry
        _, origin, axis, _, _ = torus.getData()

        pnt: core.Point3D = origin.copy()
        normal: core.Vector3D = axis.copy()
        normal.scaleBy(100)
        pnt.translateBy(normal)
        plane: core.Plane = core.Plane.create(pnt, normal)

        pointDistanceData = []
        measMgr: core.MeasureManager = app.measureManager
        for p in (arc.startPoint, arc.endPoint):
            res: core.MeasureResults = measMgr.measureMinimumDistance(plane, p)
            pointDistanceData.append(
                {
                    "dist": res.value,
                    "point": p,
                }
            )
        pointDistanceData.sort(key = lambda x: x["dist"])

        vec: core.Vector3D = arc.center.vectorTo(origin)
        bottomVec: core.Vector3D = arc.center.vectorTo(pointDistanceData[0]["point"])
        topVec: core.Vector3D = arc.center.vectorTo(pointDistanceData[1]["point"])
        msg = [
            f"bottomAngle:{round(vec.angleTo(bottomVec),6)} ",
            f"topAngle:{round(vec.angleTo(topVec),6)} ",
        ]
        app.log(" / ".join(msg))

    except:
        if ui:
            ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))


def select_ent(
    msg: str,
    filter: str
) -> core.Selection:

    try:
        app: core.Application = core.Application.get()
        ui: core.UserInterface = app.userInterface
        sel = ui.selectEntity(msg, filter)
        return sel
    except:
        return None

十分汚い。

結果は凸はこんな感じ。

 bottomAngle:0.0  / topAngle:1.570796

凹はこんな感じ。

 bottomAngle:1.570796  / topAngle:3.141593

凹のbottomAngleが正しくないです。原因は2個のベクトル間の
角度をVector3D.angleToメソッドで測定すると、近い方の角度を
返してくる事でしょう。

ん～math.atan2みたいな・・・atan2でも足りないな。
穴の軸ベクトルとの内積で判断して、かな？

C#ATIA

↑ﾀｲﾄﾙ詐欺　主にFusion360API　偶にCATIA V5 VBA(絶賛ネタ切れ中)

穴テンプレートのトーラスを考える3