テキストの向きを考える1

テキストの向きを・・・難しいです。
こちらをちょっとだけ考えています。
handle text orientation ? - Autodesk Community

同じテキストでも、見る方向の影響があり
逆だ逆だって言っても”どっちから見た時の話なの？”
と言う気持ちになります。

一応、確認用のスクリプトを作成してみました。

# Fusion360API Python script

import traceback
import adsk.fusion
import adsk.core
import math

def run(context):
    ui = adsk.core.UserInterface.cast(None)
    try:
        app: adsk.core.Application = adsk.core.Application.get()
        ui = app.userInterface
        des: adsk.fusion.Design = app.activeProduct
        root: adsk.fusion.Component = des.rootComponent

        planes = [
            root.xYConstructionPlane,
            root.yZConstructionPlane,
            root.xZConstructionPlane,
        ]

        [initSketchText(p) for p in planes]

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

def initSketchText(
    plane: adsk.fusion.ConstructionPlane):

    comp: adsk.fusion.Component = plane.parent
    skt: adsk.fusion.Sketch = comp.sketches.add(plane)

    sktLines: adsk.fusion.SketchLines = skt.sketchCurves.sketchLines

    # p1: adsk.core.Point3D = adsk.core.Point3D.create(0, 0, 0)
    # uVec: adsk.core.Vector3D = plane.geometry.uDirection
    # uVec.scaleBy(2)
    # p1.translateBy(uVec)
    # p1 = skt.modelToSketchSpace(p1)
    # sktLines.addByTwoPoints(adsk.core.Point3D.create(0, 0, 0), p1)

    # p2: adsk.core.Point3D = adsk.core.Point3D.create(0, 0, 0)
    # vVec: adsk.core.Vector3D = plane.geometry.vDirection
    # vVec.scaleBy(5)
    # p2.translateBy(vVec)
    # p2 = skt.modelToSketchSpace(p2)
    # sktLines.addByTwoPoints(adsk.core.Point3D.create(0, 0, 0), p2)

    skt.isComputeDeferred = True

    angle = 10
    mat: adsk.core.Matrix3D = adsk.core.Matrix3D.create()
    mat.setToRotation(
        math.radians(angle),
        # plane.geometry.uDirection.crossProduct(plane.geometry.vDirection),
        adsk.core.Vector3D.create(0, 0, 1),
        adsk.core.Point3D.create(0, 0, 0),
    )
    p1: adsk.core.Point3D = adsk.core.Point3D.create(5, 0, 0)
    p2: adsk.core.Point3D = adsk.core.Point3D.create(15, 0, 0)
    pnts = [(p1, p2)]
    for _ in range(int(360 / angle)):
        p1.transformBy(mat)
        p2.transformBy(mat)
        pnts.append((p1.copy(), p2.copy()))


    guides = [sktLines.addByTwoPoints(p1, p2) for p1, p2 in pnts]

    texts: adsk.fusion.SketchTexts = skt.sketchTexts
    input = texts.createInput2('Text Along a Curve', 0.75)
    for guide in guides:
        input.setAsAlongPath(
            guide,
            True,
            adsk.core.HorizontalAlignments.CenterHorizontalAlignment,
            0
        )
        texts.add(input)

    skt.isComputeDeferred = False