このトライアングルコレクションのTrianglePoint位置を、各トライアングルの各TrianglePointの x,y,z 値の 3DArray（[x,y,z values][TrianglePoint][Triangle]）として戻します。
set root = Application.ActiveProject.ActiveScene.Root
set obj = root.AddGeometry( "Cube", "MeshSurface" )
a = obj.ActivePrimitive.Geometry.Triangles.positionarray
for i=LBound( a, 3 ) to UBound( a, 3 )
for j=LBound( a, 2 ) to UBound( a, 2 )
Application.LogMessage "t" & i & ".p" & j & ".position: " & a(0,j,i) & "," & a(1,j,i) & "," & a(2,j,i)
next
next
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