"Xilo Musimene" <xil### [at] hotpopcom> schreef in bericht
news:3EC### [at] hotpopcom...
> I've read your code and you seem to have only 16^2 polygons for your
> skySphere, am I right?  Well, I have 10^2, it might explain the
> jaggyness, but I do believe my code is not as optimal as yours! =)

You can get 'perfect' results (without any jaggyness) if you use a skybox
instead of a skysphere.  It's a little bit more complicated to make suitable
skybox-textures, but the results are faster and better.

cu!

--
camera{location-z*3}#macro G(b,e)b+(e-b)*(C/50)#end#macro L(b,e,k,l)#local C=0
;#while(C<50)sphere{G(b,e),.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1
;#end#end L(y-x,y,x,x+y)L(y,-x-y,x+y,y)L(-x-y,-y,y,y+z)L(-y,y,y+z,x+y)L(0,x+y,
<.5,1,.5>,x)L(0,x-y,<.5,1,.5>,x)               // ZK http://www.povplace.be.tf

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> You can get 'perfect' results (without any jaggyness) if you use a skybox
> instead of a skysphere.  It's a little bit more complicated to make suitable
> skybox-textures, but the results are faster and better.

I've been thinking about this and probably I should need to make 6 
images for the skybox, right?  Or should I still use the exact same 
spherical camera I just used...?

Thanks,
   Xilo

-- 
Dedicated to audio/visual and interactive artwork.
http://www.geocities.com/simonlemieux/

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>   If I didn't want you to use my code, I wouldn't have posted it in the
> first place (I would have just said what I did).

Good! =)

   Then you will probably see a new EyeCandy on my website in a week or two!

Thanks!
   Xilo

-- 
Dedicated to audio/visual and interactive artwork.
http://www.geocities.com/simonlemieux/

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"Xilo Musimene" <xil### [at] hotpopcom> schreef in bericht
news:3EC### [at] hotpopcom...
> > You can get 'perfect' results (without any jaggyness) if you use a
skybox
> > instead of a skysphere.  It's a little bit more complicated to make
suitable
> > skybox-textures, but the results are faster and better.
> I've been thinking about this and probably I should need to make 6
> images for the skybox, right?  Or should I still use the exact same
> spherical camera I just used...?

no, a spherical camera won't work (at least, I don't think it will :), you
will have to make 6 perspective-views.
I did it once, maybe it's still available online, let me check :)
It *might* be this: http://sad.studentenweb.org/cg/stad.zip
But I don't know if it is just the source, or if it is compiled, or whatever
:-/

good luck anyway :)

cu!
--
ZK AKA SaD
http://www.povplace.be.tf
"I'm spinning!"

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> no, a spherical camera won't work (at least, I don't think it will :), you
> will have to make 6 perspective-views.
> I did it once, maybe it's still available online, let me check :)
> It *might* be this: http://sad.studentenweb.org/cg/stad.zip
> But I don't know if it is just the source, or if it is compiled, or whatever
> :-/

I found it in your zip file:

     void setSkyBox(GLuint texture,GLfloat helderheid){
         glDisable(GL_LIGHTING);
         glDisable(GL_CULL_FACE);
         glBindTexture(GL_TEXTURE_2D,texture);
         gluLookAt 
(0.0,0.0,0.0,_lookat.getX()-_locatie.getX(),_lookat.getY()-_locatie.getY(),_lookat.getZ()-_locatie.getZ(),_up.getX(),_up.getY(),_up.getZ());
         glColor4f(helderheid*2,helderheid*1.5,helderheid,1.0);
         glBegin(GL_QUADS);
             // Top
             glTexCoord2f(1.0/4.0,1.0/3.0); glVertex3f(-1.0,1.0,-1.0);
             glTexCoord2f(0.0/4.0,1.0/3.0); glVertex3f(1.0,1.0,-1.0);
             glTexCoord2f(0.0/4.0,2.0/3.0); glVertex3f(1.0,1.0,1.0);
             glTexCoord2f(1.0/4.0,2.0/3.0); glVertex3f(-1.0,1.0,1.0);

             //Left
             glTexCoord2f(1.0/4.0,1.0/3.0); glVertex3f(-1.0,1.0,-1.0);
             glTexCoord2f(1.0/4.0,2.0/3.0); glVertex3f(-1.0,1.0,1.0);
             glTexCoord2f(2.0/4.0,2.0/3.0); glVertex3f(-1.0,-1.0,1.0);
             glTexCoord2f(2.0/4.0,1.0/3.0); glVertex3f(-1.0,-1.0,-1.0);

             //Right
             glTexCoord2f(4.0/4.0,2.0/3.0); glVertex3f(1.0,1.0,1.0);
             glTexCoord2f(4.0/4.0,1.0/3.0); glVertex3f(1.0,1.0,-1.0);
             glTexCoord2f(3.0/4.0,1.0/3.0); glVertex3f(1.0,-1.0,-1.0);
             glTexCoord2f(3.0/4.0,2.0/3.0); glVertex3f(1.0,-1.0,1.0);

             // Far
             glTexCoord2f(2.0/4.0,2.0/3.0); glVertex3f(-1.0,-1.0,1.0);
             glTexCoord2f(2.0/4.0,3.0/3.0); glVertex3f(-1.0,1.0,1.0);
             glTexCoord2f(3.0/4.0,3.0/3.0); glVertex3f(1.0,1.0,1.0);
             glTexCoord2f(3.0/4.0,2.0/3.0); glVertex3f(1.0,-1.0,1.0);

             // Near
             glTexCoord2f(2.0/4.0,1.0/3.0); glVertex3f(-1.0,-1.0,-1.0);
             glTexCoord2f(2.0/4.0,0.0/3.0); glVertex3f(-1.0,1.0,-1.0);
             glTexCoord2f(3.0/4.0,0.0/3.0); glVertex3f(1.0,1.0,-1.0);
             glTexCoord2f(3.0/4.0,1.0/3.0); glVertex3f(1.0,-1.0,-1.0);

             //Bottom
             glTexCoord2f(2.0/4.0,1.0/3.0); glVertex3f(-1.0,-1.0,-1.0);
             glTexCoord2f(3.0/4.0,1.0/3.0); glVertex3f(1.0,-1.0,-1.0);
             glTexCoord2f(3.0/4.0,2.0/3.0); glVertex3f(1.0,-1.0,1.0);
             glTexCoord2f(2.0/4.0,2.0/3.0); glVertex3f(-1.0,-1.0,1.0);
         glEnd();
         glColor4f(1.0,1.0,1.0,1.0);
         glEnable(GL_LIGHTING);
         glEnable(GL_CULL_FACE);
         glLoadIdentity();
     }

But I don't really understand what texture you used...  Did you paste 
the six images toghether in one?

Thanks,
   Xilo

-- 
Dedicated to audio/visual and interactive artwork.
http://www.geocities.com/simonlemieux/

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"Xilo Musimene" <xil### [at] hotpopcom> schreef in bericht
news:3EC### [at] hotpopcom...
> I found it in your zip file:
>
>      void setSkyBox(GLuint texture,GLfloat helderheid){
>          glDisable(GL_LIGHTING);
>          glDisable(GL_CULL_FACE);
>          glBindTexture(GL_TEXTURE_2D,texture);
>          gluLookAt
>
(0.0,0.0,0.0,_lookat.getX()-_locatie.getX(),_lookat.getY()-_locatie.getY(),_
lookat.getZ()-_locatie.getZ(),_up.getX(),_up.getY(),_up.getZ());
>          glColor4f(helderheid*2,helderheid*1.5,helderheid,1.0);
>          glBegin(GL_QUADS);
>              // Top
>              glTexCoord2f(1.0/4.0,1.0/3.0); glVertex3f(-1.0,1.0,-1.0);
>              glTexCoord2f(0.0/4.0,1.0/3.0); glVertex3f(1.0,1.0,-1.0);
>              glTexCoord2f(0.0/4.0,2.0/3.0); glVertex3f(1.0,1.0,1.0);
>              glTexCoord2f(1.0/4.0,2.0/3.0); glVertex3f(-1.0,1.0,1.0);
>
>              //Left
>              glTexCoord2f(1.0/4.0,1.0/3.0); glVertex3f(-1.0,1.0,-1.0);
>              glTexCoord2f(1.0/4.0,2.0/3.0); glVertex3f(-1.0,1.0,1.0);
>              glTexCoord2f(2.0/4.0,2.0/3.0); glVertex3f(-1.0,-1.0,1.0);
>              glTexCoord2f(2.0/4.0,1.0/3.0); glVertex3f(-1.0,-1.0,-1.0);
>
>              //Right
>              glTexCoord2f(4.0/4.0,2.0/3.0); glVertex3f(1.0,1.0,1.0);
>              glTexCoord2f(4.0/4.0,1.0/3.0); glVertex3f(1.0,1.0,-1.0);
>              glTexCoord2f(3.0/4.0,1.0/3.0); glVertex3f(1.0,-1.0,-1.0);
>              glTexCoord2f(3.0/4.0,2.0/3.0); glVertex3f(1.0,-1.0,1.0);
>
>              // Far
>              glTexCoord2f(2.0/4.0,2.0/3.0); glVertex3f(-1.0,-1.0,1.0);
>              glTexCoord2f(2.0/4.0,3.0/3.0); glVertex3f(-1.0,1.0,1.0);
>              glTexCoord2f(3.0/4.0,3.0/3.0); glVertex3f(1.0,1.0,1.0);
>              glTexCoord2f(3.0/4.0,2.0/3.0); glVertex3f(1.0,-1.0,1.0);
>
>              // Near
>              glTexCoord2f(2.0/4.0,1.0/3.0); glVertex3f(-1.0,-1.0,-1.0);
>              glTexCoord2f(2.0/4.0,0.0/3.0); glVertex3f(-1.0,1.0,-1.0);
>              glTexCoord2f(3.0/4.0,0.0/3.0); glVertex3f(1.0,1.0,-1.0);
>              glTexCoord2f(3.0/4.0,1.0/3.0); glVertex3f(1.0,-1.0,-1.0);
>
>              //Bottom
>              glTexCoord2f(2.0/4.0,1.0/3.0); glVertex3f(-1.0,-1.0,-1.0);
>              glTexCoord2f(3.0/4.0,1.0/3.0); glVertex3f(1.0,-1.0,-1.0);
>              glTexCoord2f(3.0/4.0,2.0/3.0); glVertex3f(1.0,-1.0,1.0);
>              glTexCoord2f(2.0/4.0,2.0/3.0); glVertex3f(-1.0,-1.0,1.0);
>          glEnd();
>          glColor4f(1.0,1.0,1.0,1.0);
>          glEnable(GL_LIGHTING);
>          glEnable(GL_CULL_FACE);
>          glLoadIdentity();
>      }
>
> But I don't really understand what texture you used...  Did you paste
> the six images toghether in one?

Yes. I used a texture similar to
http://www.turbosquid.com/Previews/Content_on_4_26_2003_07_30_53/1-5-flat.jp
gC46C3EF2-BA1E-444C-ACC051D0AB9AC308.jpgLarge.jpg
I believe the texture I used, is included in the zip, probably skybox.raw (I
believe it's 1024*1024*24bit, RGB, no header).  If it's not included, you
can download it here: http://sad.studentenweb.org/cg/skyboxzonderflare.raw
(3MB!!)

cu!
--
ZK AKA SaD
http://www.povplace.be.tf
"Train you will I. Train you I will. Yes! Step one: touch your tongue to
mine."

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> Yes. I used a texture similar to
> http://www.turbosquid.com/Previews/Content_on_4_26_2003_07_30_53/1-5-flat.jp
> gC46C3EF2-BA1E-444C-ACC051D0AB9AC308.jpgLarge.jpg
> I believe the texture I used, is included in the zip, probably skybox.raw (I
> believe it's 1024*1024*24bit, RGB, no header).  If it's not included, you
> can download it here: http://sad.studentenweb.org/cg/skyboxzonderflare.raw
> (3MB!!)

Ok, now I understand...
But, this takes twice Video RAM as it should...  the white squares are 
also on the VRAM and I think it would be more optimised to use 6 
different square textures...

And I was wondering what exact kind of camera you used?
Simply a normal camera with angle of 90?

Thanks,
   Xilo

-- 
Dedicated to audio/visual and interactive artwork.
http://www.geocities.com/simonlemieux/

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"Xilo Musimene" <xil### [at] hotpopcom> schreef in bericht
news:3EC### [at] hotpopcom...
> Ok, now I understand...
> But, this takes twice Video RAM as it should...  the white squares are
> also on the VRAM and I think it would be more optimised to use 6
> different square textures...

it would probably indeed be more efficient if you used 6 different textures
instead of 1 big, and possibly even easier, but I had to do this very
quickly (school-reasons :) and I didn't think of that :)

> And I was wondering what exact kind of camera you used?
> Simply a normal camera with angle of 90?

I believe so, yes... Let me check! :)
hmm, I don't have the POV-file here, sorry :-/

cu!
--
ZK AKA SaD
http://www.povplace.be.tf
"I won't bite... hard."

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> it would probably indeed be more efficient if you used 6 different textures
> instead of 1 big, and possibly even easier, but I had to do this very
> quickly (school-reasons :) and I didn't think of that :)

Good!

>>And I was wondering what exact kind of camera you used?
>>Simply a normal camera with angle of 90?
> 
> 
> I believe so, yes... Let me check! :)
> hmm, I don't have the POV-file here, sorry :-/

Anyway, it's not a big problem, it's not like if there were thousand 
kinds of cameras!

I'll do some tests whenever I have the time!...

Thanks a lot!
   Xilo

-- 
Dedicated to audio/visual and interactive artwork.
http://www.geocities.com/simonlemieux/

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"Xilo Musimene" <xil### [at] hotpopcom> schreef in bericht
news:3EC### [at] hotpopcom...
> Anyway, it's not a big problem, it's not like if there were thousand
> kinds of cameras!
>
> I'll do some tests whenever I have the time!...

ok, good luck! :)


> Thanks a lot!

np :)

cu!
--
ZK AKA SaD
http://www.povplace.be.tf
"He can breathe OK, long as nobody unplugs him"

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