topic Re: Selection, 3D, R14.01, vba in VBA Forum

Selection, 3D, R14.01, vba

Anonymous — Tue, 25 Jan 2000 15:21:39 GMT

Dear All,

I have a simple problem in selectionset.

How can I select objects between point1 (100,100,10) and point2
(500, 500, 20) by "volume" not by "area"?

I tried but cannot specify the "Z" of the point1 and point2.

The selectionset always includes all objects within the 2D rectangle area.

All objects within that area, at all depth are included in my selectionset.

Which of the following mode, or any methods, filters can define a volume

acSelectionSetAll
acSelectionSetCrossing
acSelectionSetCrossingPolygon
acSelectionSetFence
acSelectionSetLast
acSelectionSetPrevious
acSelectionSetWindow
acSelectionSetWindowPolygon

Thanks in Advance.

Kin

Re: Selection, 3D, R14.01, vba

Anonymous — Tue, 25 Jan 2000 16:20:12 GMT

You cannot select by volume, i.e. specifying a different Z coord for the
second point. I'm assuming that some of the objects within your selection
area are at a different elevation, and you don't want those selected? I
guess one way to do that would be to set your first selection set, then flip
the UCS to set a second selection set, and compare the two sets for common
objects.

--
R. Robert Bell, MCSE
Network Administrator & Top Gun
(remove the not. for e-mail)

k.c.kwok wrote in message
news:86kf2s$p3021@adesknews2.autodesk.com...
> Dear All,
>
> I have a simple problem in selectionset.
>
> How can I select objects between point1 (100,100,10) and point2
> (500, 500, 20) by "volume" not by "area"?
>
> I tried but cannot specify the "Z" of the point1 and point2.
>
> The selectionset always includes all objects within the 2D rectangle area.
>
> All objects within that area, at all depth are included in my
selectionset.
>
>
> Which of the following mode, or any methods, filters can define a volume
>
> acSelectionSetAll
> acSelectionSetCrossing
> acSelectionSetCrossingPolygon
> acSelectionSetFence
> acSelectionSetLast
> acSelectionSetPrevious
> acSelectionSetWindow
> acSelectionSetWindowPolygon
>
> Thanks in Advance.
>
> Kin
>
>
>
>

Re:

Anonymous — Tue, 25 Jan 2000 19:29:41 GMT

Thanks, Robert,

Thanks for your idea to select a volume by using WCS and a UCS.

I will practise your WCS and UCS to define a volume.

I have a strong believe that the Z co-ordinate may have a function or role
in the selectionset. There may be a reason for AutoCAD to use 3D WCS points,
instead of 2D points, to define a selectionset.

If you come across any method to select by volume please let me know.

Regards,
Kin

R. Robert Bell wrote in message <86kig8$p3g30@adesknews2.autodesk.com>...
>You cannot select by volume, i.e. specifying a different Z coord for the
>second point. I'm assuming that some of the objects within your selection
>area are at a different elevation, and you don't want those selected? I
>guess one way to do that would be to set your first selection set, then
flip
>the UCS to set a second selection set, and compare the two sets for common
>objects.
>
>--
>R. Robert Bell, MCSE
>Network Administrator & Top Gun
>(remove the not. for e-mail)
>
>
>k.c.kwok wrote in message
>news:86kf2s$p3021@adesknews2.autodesk.com...
>> Dear All,
>>
>> I have a simple problem in selectionset.
>>
>> How can I select objects between point1 (100,100,10) and point2
>> (500, 500, 20) by "volume" not by "area"?
>>
>> I tried but cannot specify the "Z" of the point1 and point2.
>>
>> The selectionset always includes all objects within the 2D rectangle
area.
>>
>> All objects within that area, at all depth are included in my
>selectionset.
>>
>>
>> Which of the following mode, or any methods, filters can define a volume
>>
>> acSelectionSetAll
>> acSelectionSetCrossing
>> acSelectionSetCrossingPolygon
>> acSelectionSetFence
>> acSelectionSetLast
>> acSelectionSetPrevious
>> acSelectionSetWindow
>> acSelectionSetWindowPolygon
>>
>> Thanks in Advance.
>>
>> Kin
>>
>>
>>
>>
>
>

Re: Selection, 3D, R14.01, vba

Anonymous — Sat, 09 Sep 2006 00:37:12 GMT

You can select by volume using acSelectionFence, Fence allows 3D points. The problem is that sometimes not all the entities are selected.... autodesk problem....

see some code:

'' Seleciona o perfil referente ao ID
Dim solido As Acad3DSolid
Dim ssetSolido As AcadSelectionSet
Dim ptSelecao(x To Z) As Double
Dim gpCode(0) As Integer
Dim dataValue(0) As Variant
Dim dataType As Variant
Dim data As Variant
Dim descricao_perfil As String
Dim ptList(17) As Double
Dim lado_cubo As Double

lado_cubo = 80

gpCode(0) = 0
dataValue(0) = "3DSOLID"

Call vetorVariant_vetorFixo(entBlock.InsertionPoint, ptSelecao)
Set ssetSolido = Define_Selection_Set("SS1_ID_Solidos")
Call delta(ptSelecao, p1, lado_cubo, lado_cubo)
Call delta(ptSelecao, p2, -lado_cubo, -lado_cubo)

'' Lista do cubo da fence
ptList(0) = p1(x): ptList(1) = p1(Y): ptList(2) = ptSelecao(Z) '' Plano XY SD
ptList(3) = p1(x): ptList(4) = p2(Y): ptList(5) = ptSelecao(Z) '' Plano XY ID
ptList(6) = p2(x): ptList(7) = p2(Y): ptList(8) = ptSelecao(Z) '' Plano XY IE
ptList(9) = p2(x): ptList(10) = p1(Y): ptList(11) = ptSelecao(Z) '' Plano XY SE
ptList(12) = p1(x) - 5: ptList(13) = p1(Y): ptList(14) = ptSelecao(Z) '' P5
ptList(15) = p1(x) - 5: ptList(16) = p1(Y): ptList(17) = ptSelecao(Z) - lado_cubo '' Plano XY SE

''Call moSpace.Add3DPoly(ptList)
''Call ssetSolido.Select(acSelectionSetCrossing, p1, p2, gpCode, dataValue)
Call ssetSolido.SelectByPolygon(acSelectionSetFence, ptList, gpCode, dataValue)
''Call SetVar("PICKBOX", 10)
''Call ssetSolido.SelectAtPoint(ptSelecao, gpCode, dataValue)

Re: Selection, 3D, R14.01, vba

Anonymous — Sat, 16 Dec 2006 14:32:27 GMT

That`s right, the only selection mode that takes in account elevation is acSelectionFence. The problem is that the fence is just a line, not a surface. That's why some entities don`t get selected. If the line of the fence doesn`t contact the entity, it doesn`t count for the SelectionSet.
It seems that the only solution passes by selecting in the two UCSs mentioned above.