Re: [gts-general] surface generation and boolean operations

[berry <lua...@gm...>]

Hi, Verma

I am very expecting your software.  Previously I have used gts for boolean
operation on very complex geometries , for example, engine block,  but it
fails at most cases.


Cheers,
On Fri, Aug 1, 2008 at 11:31 PM, Chaman Singh Verma <cs...@gm...>wrote:

> Hello,
>
> Perhaps all your geometric objects are explicit and definable
> by either f(x,y,z) or some NURBS representations.  I think there
> are many software which are capable to triangulating these surfaces.
> Perhaps the simplest could be using VTK. The procedure to
> generate very high quality mesh on such object is very fast, so
> even if you 10^6 such objects, this might take few minutes.
>
> If you have objects with sharp corners, you may want to use
> dual Contouring method for high quality meshing.
>
> Now answer to the second question. GTS is very efficient and
> I had used this for extremely complicated surfaces.  I am in the
> process of putting my software JAAL in public domain, but it might
> take some time. It includes all the functionalities of GTS and
> designed with STL and modern software design patterns.
>
> Chaman Singh Verma
> Poona, India
>
>
>
> On Fri, Aug 1, 2008 at 8:34 PM, Nagella, S (Srikanth) <S.N...@rl...>wrote:
>
>>   Hi Verma
>>
>> My exact problem is I have several cones, spheres, cylinders, with varying
>> dimensions and some times a generic quadratic surface. There is a Boolean
>> expression to evaluate the final object using these primitives. The result
>> geometry need not be very accurate.
>>
>> How can I triangulate the all the surfaces? What is the software that
>> improves the quality of the result mesh? Will I be able to use in my open
>> source project?
>>
>> Thanks
>>
>> Sri
>>
>>
>>  ------------------------------
>>
>> *From:* gts...@li... [mailto:
>> gts...@li...] *On Behalf Of *Chaman Singh
>> Verma
>> *Sent:* 01 August 2008 15:58
>> *To:* general discussion about GTS
>> *Subject:* Re: [gts-general] surface generation and boolean operations
>>
>>
>>
>> Hello,
>>
>> It is much easier that to triangulate first all the surfaces and
>> then use GTS. This is what I do, but it depends what you want
>> to do after the operations. The quality of the mesh near the intersection
>> would be quite bad in most cases, and I have developed software which can
>> improve them.
>>
>> Chaman Singh Verma
>>
>> On Fri, Aug 1, 2008 at 7:42 PM, Nagella, S (Srikanth) <S.N...@rl...>
>> wrote:
>>
>> Dear All
>>
>> I am trying to generate geometry for instrument. The instrument is defined
>> as set of geometry primitives (Cone, sphere, or quadratic surface) and
>> Boolean operations on them.
>>
>> Can GTS do the above operation? I know GTS can do Boolean operation but I
>> couldn't find any documentation on whether it can generate triangles mesh
>> for Cone, Sphere or any quadratic surface.
>>
>> Any help will be much appreciated
>>
>> Thanks a lot
>>
>> Sri
>>
>>
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-- 
Pang Shengyong
Solidification Simulation Lab,
State Key Lab of Mould & Die Technology,
Huazhong Univ. of Sci. & Tech. China