Using Programming Languages other than VBA

Sub Example_Mirror3D()
	' This example creates a box in model space, and mirrors the box about a plane.

	Dim boxObj As Acad3DSolid
	Dim length As Double, width As Double, height As Double
	Dim center(0 To 2) As Double

	' Define the box
	center(0) = 5#: center(1) = 5#: center(2) = 0
	length = 5#: width = 7: height = 10#

	' Create the box (3DSolid) object in model space
	Set boxObj = ThisDrawing.ModelSpace.AddBox(center, length, width, height)

	' Define the mirroring plane with three points
	Dim mirrorPt1(0 To 2) As Double
	Dim mirrorPt2(0 To 2) As Double
	Dim mirrorPt3(0 To 2) As Double

	mirrorPt1(0) = 1.25: mirrorPt1(1) = 0: mirrorPt1(2) = 0
	mirrorPt2(0) = 1.25: mirrorPt2(1) = 2: mirrorPt2(2) = 0
	mirrorPt3(0) = 1.25: mirrorPt3(1) = 2: mirrorPt3(2) = 2

	' Mirror the box
	Dim mirrorBoxObj As Acad3DSolid
	Set mirrorBoxObj = boxObj.Mirror3D(mirrorPt1, mirrorPt2, mirrorPt3)

	' Change the viewing direction of the viewport
	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