Sub Example_SliceSolid()
    'Этот пример создает поле в пространстве модели.
    'Затем разрезает поле, основываясь на плоскости, определенной тремя
    'точками. Пластина возвращена как 3Dsolid.
        
    Dim boxObj As Acad3DSolid
    Dim length As Double, width As Double, height As Double
    Dim center(0 To 2) As Double
    
    'Определите поле
    center(0) = 5#: center(1) = 5#: center(2) = 0
    length = 5#: width = 7: height = 10#
    
    'Создайте объект поля (3DSolid) в пространстве модели
    Set boxObj = ThisDrawing.ModelSpace.AddBox(center, length, width, height)
    
    'Определите плоскости раздела с тремя точками
    Dim slicePt1(0 To 2) As Double
    Dim slicePt2(0 To 2) As Double
    Dim slicePt3(0 To 2) As Double
    
    slicePt1(0) = 1.5: slicePt1(1) = 7.5: slicePt1(2) = 0
    slicePt2(0) = 1.5: slicePt2(1) = 7.5: slicePt2(2) = 10
    slicePt3(0) = 8.5: slicePt3(1) = 2.5: slicePt3(2) = 10
    
    'пластина поле
    Dim sliceObj As Acad3DSolid
    Set sliceObj = boxObj.SliceSolid(slicePt1, slicePt2, slicePt3, True)
    
    'Измените направление рассмотрения области просмотра
    Dim NewDirection(0 To 2) As Double
    NewDirection(0) = -1: NewDirection(1) = -1: NewDirection(2) = 1
    ThisDrawing.ActiveViewport.direction = NewDirection
    ThisDrawing.ActiveViewport = ThisDrawing.ActiveViewport
    ZoomAll
    
End Sub