The net effect of what I described is what you want (I think), the limititaion is that
it requires filling the polygons.
-Kyle
White Morph wrote:
> Hi, Kyle:
>
> Thanks for the reply, but that's not my question. My question is, for an arbitrary
>polygon(including non-convex or non-planar ploygons), we have to tessellate it into
>triangles, so it will create a lot of new edges inside. No matter fill the polygon or
>not, I just hope to display the original edges for the polygon(the outline) not those
>new edges.
>
> Anyway, thanks for reply.
>
> white
>
>
>>Hi,
>>
>>I don't know if you also want to fill the polgons or if you only want
>>wireframe?
>>
>>If you want to fill them then the trick I use might be useful to you.
>>
>>I create 2 Shape 3D's with different appearences.
>> 1 is set for filled polygons and CULL_BACK
>> 1 is set for polygon edges, and CULL_FRONT
>>
>>Then I create a single geometry, and add it to both Shape3D's.
>>
>>This has the effect ofdrawing only the visible edges of the geometry.
>>You can play with the polygon offset, and possibly put them in an
>>ordered group to perfect it if you have problems.
>>
>> -Kyle
>>
>>
>>White Morph wrote:
>>
>>
>>>Hi,
>>>
>>>I posted my problem some days ago, but no one can give me an answer. It's
>>>a simple problem, but I don't have an answer by using Java3D. Is it possible in
>Java3D?
>>>
>>>The problem is: to draw the outline for an arbitray polygon, but not those
>>>edges generated by the tessellation.
>>>
>>>In OpenGL, we have the glEdgeFlag() function to control the hide/display of
>>>an edge, so we definitely can do it.
>>>
>>>In Java3D, the GeometryInfo class does the tessellation job, but it doesn't
>>>have any information to control the display/hide of an edge. Does any other
>>>class have the control?
>>>
>>>Thanks a lot
>>>
>>>white
>>>
>>>===========================================================================
>>>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
>>>of the message "signoff JAVA3D-INTEREST". For general help, send email to
>>>[EMAIL PROTECTED] and include in the body of the message "help".
>>>
>>>
>>
>>--
>> _
>>-------------------------------ooO( )Ooo-------------------------------
>>Kyle J. McDonald (o o) Systems Support Engineer
>>Sun Microsystems Inc. |||||
>>Enterprise Server Products [EMAIL PROTECTED]
>>1 Network Drive BUR03-4630 \\\// voice: (781) 442-2184
>>Burlington, MA 01803 (o o) fax: (781) 442-1542
>>-------------------------------ooO(_)Ooo-------------------------------
>>
>>==========================================================================
>>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
>>of the message "signoff JAVA3D-INTEREST". For general help, send email to
>>[EMAIL PROTECTED] and include in the body of the message "help".
>>
>
> ===========================================================================
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
> of the message "signoff JAVA3D-INTEREST". For general help, send email to
> [EMAIL PROTECTED] and include in the body of the message "help".
>
--
_
-------------------------------ooO( )Ooo-------------------------------
Kyle J. McDonald (o o) Systems Support Engineer
Sun Microsystems Inc. |||||
Enterprise Server Products [EMAIL PROTECTED]
1 Network Drive BUR03-4630 \\\// voice: (781) 442-2184
Burlington, MA 01803 (o o) fax: (781) 442-1542
-------------------------------ooO(_)Ooo-------------------------------
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA3D-INTEREST". For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".
