Hi!

Is there any tool or way to create meshes out of objects (such as unions, 
basic shapes, differences or intersections)?

Greetings,

Sven

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"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message 
news:446e1ec6@news.povray.org...
> Hi!
> 
> Is there any tool or way to create meshes out of objects (such as 
unions, 
> basic shapes, differences or intersections)?

http://jgrimbert.free.fr/pov/patch/tessel/index.html

cu!
-- 
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com

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"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message 
news:446e1ec6@news.povray.org...
> Is there any tool or way to create meshes out of objects (such as unions,
> basic shapes, differences or intersections)?


"Zeger Knaepen" <zeg### [at] povplacecom> schrieb im Newsbeitrag 
news:446e5964@news.povray.org...
> http://jgrimbert.free.fr/pov/patch/tessel/index.html


Hi Zeger,

thanks for that link. I opened it, and I see there a number of images and 
some kind of functions. But there is no further description or explanation 
which could help me to understand the contents better. Can you give me some 
information?

Thanks,

Sven

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"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message 
news:446e5b09@news.povray.org...
> Hi Zeger,
> 
> thanks for that link. I opened it, and I see there a number of images 
and 
> some kind of functions. But there is no further description or 
explanation 
> which could help me to understand the contents better. Can you give me 
some 
> information?

uhm, it's the tesselation-patch, a POV-Ray patch that allows you to 
tesselate any object.

Never tried it though

cu!
-- 
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com

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I am still looking for a way to transform POV-Ray objects (such as unions, 
basic shapes, differences or intersections) to POV-Ray meshes.

Who can help?

Sven

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Sven Littkowski <sve### [at] jamaica-focuscom> wrote:
> I am still looking for a way to transform POV-Ray objects (such as unions, 
> basic shapes, differences or intersections) to POV-Ray meshes.

  It's not possible, at least not currently.

-- 
                                                          - Warp

Post a reply to this message

Warp wrote:
> Sven Littkowski <sve### [at] jamaica-focuscom> wrote:
>> I am still looking for a way to transform POV-Ray objects (such as unions, 
>> basic shapes, differences or intersections) to POV-Ray meshes.
> 
>   It's not possible, at least not currently.

Shh, don't tell Moray 3.5 that...

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

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Tim Cook <z99### [at] bellsouthnet> wrote:
> Shh, don't tell Moray 3.5 that...

  It can convert POV-Ray SDL to meshes?

-- 
                                                          - Warp

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Warp wrote:
>   It can convert POV-Ray SDL to meshes?

It can convert POV primitive-based CSG objects into meshes.  Yes, you 
have to build them in Moray, but when you render it before converting to 
mesh, it's still a POV object.  That's what was quoted and to which I 
responded, nothing about POV SDL.  *wink*

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

Post a reply to this message

Sven Littkowski wrote:

> Hi!
> 
> Is there any tool or way to create meshes out of objects (such as unions,
> basic shapes, differences or intersections)?
> 
> Greetings,
> 
> Sven

There's a way to do it in povray's SDL, which is kinda clunky. 

It essentially would turn this:
http://flickr.com/photos/pterandon/32127796/in/set-110545/

into this:
http://flickr.com/photos/pterandon/30766135/in/set-110545/

I'd have to find out where and if I've published my own code for this.  But
it involved the trace function and the makemesh macros.

Post a reply to this message

A "Make_Mesh" macro? Hmmm, that sounds quite interesting! I am going to 
research on that macro! Thanks, Greg!

Sven



> Sven Littkowski wrote:
>> Is there any tool or way to create meshes out of objects (such as unions,
>> basic shapes, differences or intersections)?

"Greg M. Johnson" <pte### [at] thereallycommononethatstartswithaYcom> schrieb 
im Newsbeitrag news:446fb63d@news.povray.org...
> I'd have to find out where and if I've published my own code for this. 
> But
> it involved the trace function and the makemesh macros.

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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Greg M. Johnson wrote:
> There's a way to do it in povray's SDL, which is kinda clunky. 
> 
> It essentially would turn this:
> http://flickr.com/photos/pterandon/32127796/in/set-110545/
> 
> into this:
> http://flickr.com/photos/pterandon/30766135/in/set-110545/
> 
	It should be possible to implement the marching cubes algorithm [1]
in SDL using an object pattern. This would probably give better
results (in particular, the arms wouldn't be attached to the sides
of the body).

		Jerome

[1] http://www.exaflop.org/docs/marchcubes/

- --
+------------------------- Jerome M. BERGER ---------------------+
|    mailto:jeb### [at] freefr      | ICQ:    238062172            |
|    http://jeberger.free.fr/     | Jabber: jeb### [at] jabberfr   |
+---------------------------------+------------------------------+
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Version: GnuPG v1.4.2.2 (GNU/Linux)

iD8DBQFEcBNad0kWM4JG3k8RAgRCAKCzRWez30Q7EJS96PlJhZsGsqx2MgCfVRno
yGyl60uOSYucZ+C4ka36QEg=
=hC31
-----END PGP SIGNATURE-----

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On 20 May 2006 16:34:09 -0400, Warp <war### [at] tagpovrayorg> wrote:

Moray 3.5 can!!!! convert POV-Ray primitives with help of 3DWin plugin
for Moray.

Moray triangulates (evaluates) internally primitives.

-tb


>Tim Cook <z99### [at] bellsouthnet> wrote:
>> Shh, don't tell Moray 3.5 that...
>
>  It can convert POV-Ray SDL to meshes?

Post a reply to this message

"Thomas Baier" <NOS### [at] stmuccom> a écrit dans le message de
news: 6b50721g0s2uhchqjhjc2t8inkt8eddohp@4ax.com...
> On 20 May 2006 16:34:09 -0400, Warp <war### [at] tagpovrayorg> wrote:
>
> Moray 3.5 can!!!! convert POV-Ray primitives with help of 3DWin plugin
> for Moray.
>
Actually Moray can export primitives and evaluated CSGs to mesh without
3DWin.
In Moray, the" transform to mesh" feature is based on the display triangles
and quads so you can set the wireframe division in the "advanced" tab of the
configuration (Alt+O) settings.
Moray exports the result as mesh or mesh2 if you want.

Marc

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Question to those who work with meshes:

my current scene has a long huge pole (diameter 600 units=meters, from -200z 
to +1800z) and many vertical cylinders with spheres at their ends inside 
which are cut at the huge main cylinder's edge (intersection or difference). 
The rendering speed is torturing slooow.

Having this transformed to a mesh, would it render faster?

Greetings,

Sven

Post a reply to this message

"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote in message 
news:44705433$1@news.povray.org...
> Question to those who work with meshes:
>
> my current scene has a long huge pole (diameter 600 units=meters, 
> from -200z to +1800z) and many vertical cylinders with spheres at their 
> ends inside which are cut at the huge main cylinder's edge (intersection 
> or difference). The rendering speed is torturing slooow.
>
> Having this transformed to a mesh, would it render faster?
>
> Greetings,
>
> Sven
>

Hi Sven,

If you're cutting a lot of holes in your main cylinder, then you may be 
running into the problem that Mike Williams has covered in his tutorial at
http://www.econym.demon.co.uk/holetut/index.htm.

Regards,
Chris B.

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"Sven Littkowski" <sve### [at] jamaica-focuscom> a écrit dans le message de news:
44705433$1@news.povray.org...
> Question to those who work with meshes:
>
> my current scene has a long huge pole (diameter 600 units=meters,
from -200z
> to +1800z) and many vertical cylinders with spheres at their ends inside
> which are cut at the huge main cylinder's edge (intersection or
difference).
> The rendering speed is torturing slooow.
>
> Having this transformed to a mesh, would it render faster?
>
> Greetings,
>
> Sven
>
>
Likely : calculing lot of differences with a huge object is time consuming,
rendering it as a mesh is very faster.

are your vertical cylinder with sphere all the same?.
If yes, you could make one difference with a short cylinder and multicopy it
all along (with rotations  around z) to build a long cylinder

Marc

Post a reply to this message

Sven Littkowski nous apporta ses lumieres en ce 21/05/2006 07:51:
> Question to those who work with meshes:
> 
> my current scene has a long huge pole (diameter 600 units=meters, from -200z 
> to +1800z) and many vertical cylinders with spheres at their ends inside 
> which are cut at the huge main cylinder's edge (intersection or difference). 
> The rendering speed is torturing slooow.
> 
> Having this transformed to a mesh, would it render faster?
> 
> Greetings,
> 
> Sven 
> 
> 
Is your camera inside that object? Are all those protuding elements like buildings
constructed on 
the iner face? Try to use an union instead. If you don't see the outer part, there
won't be any 
difference, but will render much faster.
You can also give some thickness to the cylinder wall by differencing it from a
slightly larger one.

-- 
Alain
-------------------------------------------------
Feminism: Men are shit.

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Hi!

Please have a look to  the "SciFi: Preview XX: Imperial Carrier" (inside the 
"povray.binaries.images" newsgroup) to see the large bays of a starship. 
These bays cause that slowing in the render procedure.

Greetings,

Sven



"Sven Littkowski" <sve### [at] jamaica-focuscom> schrieb im Newsbeitrag 
news:44705433$1@news.povray.org...
> Question to those who work with meshes:
>
> my current scene has a long huge pole (diameter 600 units=meters, 
> from -200z to +1800z) and many vertical cylinders with spheres at their 
> ends inside which are cut at the huge main cylinder's edge (intersection 
> or difference). The rendering speed is torturing slooow.
>
> Having this transformed to a mesh, would it render faster?
>
> Greetings,
>
> Sven
>

Post a reply to this message

"Sven Littkowski" <sve### [at] jamaica-focuscom> a écrit dans le message de news:
44707e14$1@news.povray.org...
> Hi!
>
> Please have a look to  the "SciFi: Preview XX: Imperial Carrier" (inside
the
> "povray.binaries.images" newsgroup) to see the large bays of a starship.
> These bays cause that slowing in the render procedure.
>
> Greetings,
>
Because they are CSG? waaa I understand.... you could speed up your render
by 100 at least.
why not to declare a union of theses bays  and use them for an
object_pattern  texture_map ?

Marc

Post a reply to this message

Hmmm, how would that be done? I have not yet ever used such as an 
object_pattern  texture_map.

About the scene:
- most of the cylinders are randomly placed,
- all cylinders have different sizes,
- all cylinders have a texture of map_type 2 (cylinder-type texture).

Marc, can you write more information about such object_pattern 
texture_maps?

Greetings, thanks,

Sven



"M_a_r_c" <jac### [at] wanadoofr> schrieb im Newsbeitrag 
news:44708a80@news.povray.org...
> Because they are CSG? waaa I understand.... you could speed up your render
> by 100 at least.
> why not to declare a union of theses bays  and use them for an
> object_pattern  texture_map ?

Post a reply to this message

"Sven Littkowski" <sve### [at] jamaica-focuscom> a écrit dans le message de news:
44709bfa@news.povray.org...
> Marc, can you write more information about such object_pattern
> texture_maps?
>
> Greetings, thanks,
>
> Sven

For object_pattern
http://www.povray.org/documentation/view/3.6.1/386/

for texture_map
http://www.povray.org/documentation/view/3.6.1/353/

something as
#declare Bays=union{all_your_bays}//you must declare your bays as an
textureless object (a union in this case)

#declare Overall_texture=texture{
                                                    object{Bays

texture{your_texture}//the NOT bay texture

texture{Bay_texture}//the bay texture
                                                                }
                                                    }


Marc

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You might try the "CSG To Mesh" thread in the p.t.s-f group that I posted a 
long while ago under another name...  oh, my secrets out.

-- 
#####-----#####-----#####
POV Tips and Hints at ...
http://povman.blogspot.com/

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Hi J.. -ah, Povman!

Thanks a lot for your maybe golden hint. I downloaded the .pov file but have 
not tried it out yet, because I am at the end of this day. I am going to 
render fantastic worlds in my dreams very soon.

Thanks a lot, please expect my feedback! Best greetings,

Sven


"POVMAN" <s### [at] acom> schrieb im Newsbeitrag news:44718365@news.povray.org...
> You might try the "CSG To Mesh" thread in the p.t.s-f group that I posted 
> a long while ago under another name...  oh, my secrets out.

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