Powerpoint VBA에서 당 판정을 생각한다.

기사에 영감을 받아 적당히 원이 튀는 것을 만들어 보았다.

그렇게 움직이고 있는 것만으로, 법칙이라든지 적당한 것은 용서를.

접촉 판정

이번 접촉 판정에 사용하고 있는 것은 MSOffice 2010 이후부터 탑재되고 있는 「도형의 결합」기능이다(2010에서는 리본에 표시되어 있지 않지만, 기능 자체는 존재하고 있다).

Office 2013 이상이라면
(도형 선택) 그리기 도구 > 서식 > 도형 삽입
에 존재한다.


보다 상세한 부분은 선두 기사 를 참조.

코드

PowerPoint2010 이상에서 작동해야 합니다(2013 32bit/2016 64bit에서 작동 확인).

PowerPoint에서 표준 모듈과 클래스 모듈을 삽입하고 다음 코드를 붙여 넣습니다.
클래스 모듈의 이름은 Ball로 한다.
BallBoundSample 프로 시저를 시작하면 위의 이미지와 같은 동작을 수행해야합니다.

표준 모듈

표준 모듈

Option Explicit

Private Declare PtrSafe Sub _
    Sleep Lib "kernel32" ( _
    Optional ByVal dwMilliseconds As Long = 1)

Public Type OfficeXY
    X As Single
    Y As Single
End Type

Sub BallBoundSample()
    '作業場所の指定
        Dim TgtPres As PowerPoint.Presentation
        Set TgtPres = PowerPoint.ActivePresentation

        TgtPres.SlideShowSettings.ShowType = ppShowTypeWindow2

        Dim sldShowWin As PowerPoint.SlideShowWindow
        If TgtPres.Windows.Count = 0 Then
            Set sldShowWin = TgtPres.SlideShowWindow
            sldShowWin.Activate
        Else
            Set sldShowWin = TgtPres.SlideShowSettings.Run
        End If

        Dim tgtSld As Slide
        Set tgtSld = sldShowWin.View.Slide

    '形状の準備
        Dim tgtGround As PowerPoint.Shape
        Set tgtGround = MakeGround(tgtSld)

        Dim myBall As Ball
        Set myBall = MakeBall(tgtSld)

    '動かしてみる
        Do
            'スライド外になったら抜ける
            If Not InSlideArea(myBall.BaseShape, TgtPres) Then Exit Do
            Call myBall.NextStep(0.2)
            Call myBall.Clash(tgtGround)
            Call Sleep
            DoEvents    '描写・途中で止めたい場合用
        Loop

    '後始末
        'Stop
        tgtSld.Shapes.Range.Delete

End Sub

'適当な形状を作るだけ
Private Function MakeGround(ByVal iTgtSld As Slide) As Shape
    Dim shps As PowerPoint.Shapes
    Set shps = iTgtSld.Shapes

    Dim oShp As Shape

    '位置や角度の設定は適当
    With iTgtSld.Parent.SlideMaster
        Set oShp = shps.AddShape(msoShapeRectangle, -.Width, .Height / 2, .Width * 3, 1)
    End With    'iTgtSld.Parent.SlideMaster
    Call oShp.IncrementRotation(15)
    Set MakeGround = oShp
End Function


Private Function MakeBall(ByVal iTgtSld As Slide) As Ball
    Const Size! = 50!

    Dim shpTop As Single: shpTop = 0!
    Dim shpLft As Single: shpLft = 0!
    Dim shpWid As Single: shpWid = Size
    Dim shpHit As Single: shpHit = Size

    Dim shps As PowerPoint.Shapes
    Set shps = iTgtSld.Shapes

    Dim tmpBall As PowerPoint.Shape
    Set tmpBall = shps.AddShape(msoShapeOval, shpLft, shpTop, shpWid, shpHit)
    Set MakeBall = GetBallClass(tmpBall)
End Function

Private Function GetBallClass(ByVal BaseShape As Shape) As Ball
    Dim tmpCls As Ball
    Set tmpCls = New Ball
    Call tmpCls.Init(BaseShape)
    Set GetBallClass = tmpCls
End Function

Private Function InSlideArea(ByVal ChkShp As Shape, ByVal TgtPres As Presentation) As Boolean
    With TgtPres.SlideMaster
        If ChkShp.Top + ChkShp.Height < 0 Then GoTo NotInSlideArea
        If ChkShp.Left > .Width Then GoTo NotInSlideArea

        If ChkShp.Left + ChkShp.Width < 0 Then GoTo NotInSlideArea
        If ChkShp.Top > .Height Then GoTo NotInSlideArea
    End With
    Let InSlideArea = True
Exit Function
NotInSlideArea:
    Let InSlideArea = False
Exit Function
End Function

클래스 모듈: Ball

Ball.cls

Option Explicit

Private clsShp As PowerPoint.Shape
Private clsVelocity As OfficeXY
Private clsAcceleration As OfficeXY

'反発率を再現しようとしたもの
Private Const Ratio! = 0.9!

Public Property Get BaseShape() As PowerPoint.Shape
    Set BaseShape = clsShp
End Property

Public Property Get Velocity() As OfficeXY
    Let Velocity = clsVelocity
End Property

Public Property Get Acceleration() As OfficeXY
    Let Acceleration = clsAcceleration
End Property

Private Sub Class_Initialize()
    clsVelocity.X = 0!
    clsVelocity.Y = 0!
    clsAcceleration.X = 0!
    clsAcceleration.Y = 9.81!
End Sub

Friend Sub Init(ByVal BaseShape As PowerPoint.Shape)
    Set clsShp = BaseShape
End Sub

'時間を進める
    '現在位置の更新と速度の再定義
Public Sub NextStep(Optional ByVal Step As Single = 1)
    With clsShp
        .Left = VBA.CSng(.Left + (clsVelocity.X * Step))
        .Top = VBA.CSng(.Top + (clsVelocity.Y * Step))
    End With    'clsShp

    With clsVelocity
        .X = VBA.CSng((.X + clsAcceleration.X * Step))
        .Y = VBA.CSng((.Y + clsAcceleration.Y * Step))
    End With    'clsVelocity

    '画面描写
    clsShp.TextFrame2.TextRange.Text = " "
End Sub

'不完全なロジック
    '大きくめり込んだとき、貫通したとき復帰不可
    '分解能を上げる（NextStepの引数を小さくする）ことで仮対応
Public Function Clash(ByVal iTgtShp As PowerPoint.Shape) As Boolean
    Dim sldShps As PowerPoint.Shapes
    Set sldShps = clsShp.Parent.Shapes

    Dim currentShpCnt As Long
    currentShpCnt = sldShps.Count


    Dim shpIndxs(1) As Long
    shpIndxs(0) = clsShp.ZOrderPosition
    shpIndxs(1) = iTgtShp.ZOrderPosition

    Dim dupShpRng As PowerPoint.ShapeRange
    Set dupShpRng = sldShps.Range(shpIndxs).Duplicate


    Dim dupOvalIndex As Long
    dupOvalIndex = IIf(shpIndxs(0) < shpIndxs(1), 1, 2)

    Dim currentCoords As OfficeXY
    With dupShpRng.Item(dupOvalIndex)
        currentCoords.X = .Left + (.Width / 2)
        currentCoords.Y = .Top + (.Height / 2)
    End With    'dupShpRng.Item(1)


    '形状が交差していれば、形状作成。交差していなければ形状消失。
    Call dupShpRng.MergeShapes(msoMergeIntersect)
    If currentShpCnt + 1 <> sldShps.Count Then Exit Function
    Clash = True


    Dim intersectShp As PowerPoint.Shape
    Set intersectShp = sldShps.Item(currentShpCnt + 1)

    Dim normalVector As OfficeXY
    normalVector.X = currentCoords.X - (intersectShp.Left + (intersectShp.Width / 2))
    normalVector.Y = currentCoords.Y - (intersectShp.Top + (intersectShp.Height / 2))

    Dim normalVec As Double
    normalVec = VectorNorm(normalVector)


    Dim basVector As Double
    basVector = VectorNorm(clsVelocity)

    With clsVelocity
        .X = VBA.CSng(basVector * (normalVector.X / normalVec) * Ratio)
        .Y = VBA.CSng(basVector * (normalVector.Y / normalVec) * Ratio)
    End With

    Call intersectShp.Delete
End Function

Private Function VectorNorm(BaseVector As OfficeXY) As Double
    Let VectorNorm = VBA.Sqr(BaseVector.X * BaseVector.X + BaseVector.Y * BaseVector.Y)
End Function

기타

2017/01/15 추가

선두 기사 님의 기사가 추가되었습니다.

선을 따라 구슬의 운동을 그리는 ④