Difference between revisions of "Povray"

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 +
=== see also ===
  
−
=== explosion generator ===
+
* http://ghoulsblade.schattenkind.net/files/pov/
−
* todo...
+
* http://www.ogre3d.org/tikiwiki/POVRay+Skyboxes
 +
* http://www.ogre3d.org/tikiwiki/POVRay+Explosions
 +
* spacescape skybox maker : http://www.ogre3d.org/forums/viewtopic.php?f=11&t=56125#p380926
  
 
=== skybox ===  
 
=== skybox ===  
−
* todo...
+
* http://ghoulsblade.schattenkind.net/files/pov/skybox1.pov
−
* renderskybox.php <pre>
+
* http://ghoulsblade.schattenkind.net/files/pov/renderskybox.php.txt  (optional, execute using php to generate all six faces with one command)
−
#!/usr/bin/php
+
(this is hereby released under public domain)
−
<?php
 
−
/*
 
−
This script renders 6 sides of a skybox with povray.
 
−
Written in PHP, to execute "apt-get install php4-cli"
 
−
*/
 
−
// resolution in pixels, height=weight=size
 
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$size = 256; // 32^x ??
 
−
// $size = 128;
 
−
// $size = 256;
 
−
$infile = "skybox1.pov";
 
−
$outfile_prefix = "ghoulskybox1";
 
−
$outfile_postfix = ".png";
 
  
−
$frame_name = array();  // ogre skybox naming sheme
+
placing a camera inside an explosion and maybe cutting out the interior gives nice skyboxes for spacegames (like http://sfz.schattenkind.net), see info below on how to generate such explosions/plasma effects
−
$frame_name[0] = "_fr"; // front
 
−
$frame_name[1] = "_rt"; // right
 
−
$frame_name[2] = "_bk"; // back
 
−
$frame_name[3] = "_lf"; // left
 
−
$frame_name[4] = "_up"; // up
 
−
$frame_name[5] = "_dn"; // down
 
  
 +
i suggest rendering stars onto the skybox ingame using dots or tiny billboards, this way they will look  sharp even if the skybox is not ultra-highres.
  
−
for ($i=0;$i<6;++$i) {
+
==== space, bright red ====
−
echo "rendering frame ".($i+1)."/6:\n";
+
<gallery>
−
$outfile = $outfile_prefix . $frame_name[$i] . $outfile_postfix;
+
Image:Ghoulskybox1_bk.jpg
−
shell_exec("povray  -I$infile -H$size -W$size +FN16 -D -O$outfile -K$i");
+
Image:Ghoulskybox1_dn.jpg
−
//shell_exec("povray  -I$infile -H$size -W$size +FT -D -O$outfile -K$i");
+
Image:Ghoulskybox1_fr.jpg
−
//shell_exec("convert $outfile ".str_replace(".tga",".jpg",$outfile));
+
Image:Ghoulskybox1_lf.jpg
−
}
+
Image:Ghoulskybox1_up.jpg
−
echo "done.\n";
+
Image:Ghoulskybox1_rt.jpg
 +
</gallery>
 +
(these rendered images are hereby released under public domain)
  
−
/*
+
see also http://sfz.schattenkind.net/wiki/index.php/Screenshots  for more screenshots of those skyboxes in action
−
ogre sample space skybox named "Examples/SpaceSkyBox"
 
−
is stored in ogrenew/Samples/Media/materials/scripts/Example.material
 
−
and looks like this :
 
−
material Examples/SpaceSkyBox
 
−
{
 
−
technique
 
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{
 
−
pass
 
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{
 
−
lighting off
 
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depth_write off
 
−
 
−
texture_unit
 
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{
 
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cubic_texture stevecube.jpg separateUV
 
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tex_address_mode clamp
 
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}
 
−
}
 
−
}
 
−
}
 
−
the stevecube.jpg adresses 6 images, which are zipped in ogrenew/Samples/Media/packs/skybox.zip
 
−
stevecube_UP.jpg
 
−
stevecube_FR.jpg
 
−
stevecube_DN.jpg
 
−
stevecube_BK.jpg
 
−
stevecube_LF.jpg
 
−
stevecube_RT.jpg
 
−
 
−
the povray camera for the skybox should be something like this
 
−
camera {
 
−
  location <0,0,0>
 
−
  angle 90
 
−
  right <1,0,0> up <0,1,0>
 
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  // turn the cam based on the current frame=clock : [0-5]
 
−
  #switch (clock)
 
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#range (0,3)
 
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  // first 4 frames : turn from left to right
 
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  rotate (90*clock)*y
 
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#break
 
−
#case (4)
 
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  // look at the sky
 
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  rotate 90*x
 
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#break
 
−
#case (5)
 
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  // look at the ground
 
−
  rotate -90*x
 
−
#break
 
−
  #end // End of conditional part
 
−
}
 
−
*/
 
−
?>
 
−
</pre>
 
  
−
skybox1.pov
+
==== space, dark green ====
−
<pre>
+
<gallery>
−
// Persistence of Vision Raytracer Version 3.5 Scene Description File
+
Image:Ghoulskybox2_bk.jpg
−
//*******************************************
+
Image:Ghoulskybox2_dn.jpg
 +
Image:Ghoulskybox2_fr.jpg
 +
Image:Ghoulskybox2_lf.jpg
 +
Image:Ghoulskybox2_rt.jpg
 +
Image:Ghoulskybox2_up.jpg
 +
Image:Povray_skybox_in_sfz.jpg|here's how it looks in action with stars rendered onto it at runtime
 +
</gallery>
 +
(these rendered images are hereby released under public domain)
  
−
global_settings {
+
==== clouds ====
−
  //max_trace_level 5
 
−
}
 
  
−
#include "colors.inc"
+
3 cloudy skyboxes
 +
* http://ghoulsblade.schattenkind.net/files/pov/povskyclouds.zip  (.pov files and rendered images)
 +
a few samples :
 +
<gallery>
 +
Image:Cloudskybox_bk.jpg
 +
Image:Cloudskybox2_dn.jpg
 +
Image:Cloudskybox3_up.jpg
 +
</gallery>
 +
(these rendered images and the .pov files are hereby released under public domain)
  
−
camera {
+
=== texture generation ===
−
  location <0,0,0>
+
* todo : search .pov files for this
−
  angle 90
+
* todo : camouflage texture...
−
  right <1,0,0> up <0,1,0>
+
* also interesting : kwerkzeug (google)
−
  // turn the cam based on the current frame=clock : [0-5]
+
<gallery>
−
  #switch (clock)
+
Image:Infrared.jpg
−
    #range (0,3)
+
Image:Camouflage.png
−
      // first 4 frames : turn from left to right
+
</gallery>
−
      rotate (90*clock)*y
 
−
    #break
 
−
    #case (4)
 
−
      // look at the sky
 
−
      rotate -90*x
 
−
    #break
 
−
    #case (5)
 
−
      // look at the ground
 
−
      rotate 90*x
 
−
    #break
 
−
  #end // End of conditional part
 
−
}
 
  
−
background { color rgb <0,0,0> }
+
=== explosion ===
 +
<gallery>
 +
Image:Pov_exp1.png
 +
</gallery>
 +
http://ghoulsblade.schattenkind.net/files/pov/explosion01.pov
  
−
// light_source { <100, 100, -200> color White }
+
=== random explosion generation ===
  
 +
i made a php script that would generated random colormaps and some random turbulence parameters
 +
and let it render all night long, producing one explosion image after another, and keeping the sources for later high-detail rendering of the good ones.
  
−
sphere { < 0, 0, 0>, 2
+
this is kind of bruteforcing artwork with enough processor power =)
−
pigment { rgbt 1 } // surface of sphere is transparent
 
−
interior {
 
−
media {
 
−
emission 0.02
 
−
intervals 1
 
−
samples 25
 
−
method 3
 
−
density {
 
−
spherical
 
−
ramp_wave
 
−
        translate 1.0*y  // replace 1.0 = t  by time for animation
 
−
        warp { turbulence 1.5 }
 
−
        translate -1.0*y // replace -1.0 = -t  by time for animation
 
−
color_map {
 
−
[0.0 color rgb <0, 0, 0>]
 
−
[0.1 color rgb <1, 0, 0>]
 
−
[0.5 color rgb <1, 1, 0>]
 
−
[1.0 color rgb <1, 1, 0>]
 
−
}
 
−
}
 
−
}
 
−
}
 
−
scale 25
 
−
hollow
 
−
}
 
−
</pre>
 
  
−
=== explosion ===
+
also there are a few php scripts in there for comfortable viewing and marking the good ones,
−
[[Image:Pov_exp1.png]]<br>
+
but you'll have to adjust them a bit.
−
<pre>
+
 
−
// Persistence of Vision Raytracer Version 3.5 Scene Description File
+
here are a few samples :
−
//*******************************************
+
 
 +
<gallery>
 +
Image:Explode2.jpg
 +
Image:Plasma.jpg
 +
Image:Exp_001770_000.jpg
 +
Image:Exp_002112_000.jpg
 +
Image:Macroparticle_sfz.jpg|macro particles
 +
</gallery>
 +
i generated a few thousand of those, you can find them and their sourcefiles (in breed) here :
 +
http://ghoulsblade.schattenkind.net/files/pov/povray_exploder/<br>
 +
(these are hereby released under public domain)<br>
 +
(the best ones are in exploder_nice.zip, ca 20mb, sourcefiles (.pov) included)<br>
 +
 
 +
possible uses :
 +
* macro particles for explosions (see sample above)
 +
* billboard-textures for energy/plasma weapon-projectiles
 +
* basis for skyboxes for nebulae-like scenes in spacegames (see above)
 +
* basis for explosion animations (animate __TURBSTART__, see http://www.ogre3d.org/tikiwiki/POVRay+Explosions)
 +
* as background billboard for halo/hilighting effects
 +
* "shield hit" effects
 +
* wormholes/teleporter effects
 +
* cloud/nebulae particles (make color uniform)
 +
* some might look rather nice when used as spheremap or something like that in reflection effects
 +
* [http://de.wikipedia.org/wiki/Rorschach-Test Rorschach test]  ;)
 +
* ...
 +
 
 +
 
 +
and here's the code :
 +
 
 +
http://ghoulsblade.schattenkind.net/files/pov/exploder.zip
 +
 
 +
warning ! requires quite a bit of harddisk space if you keep it running for a long time....
  
−
global_settings {
+
i give no warranty that your computer will not explode during the process ;)
−
  max_trace_level 5
 
−
}
 
  
−
#include "colors.inc"
+
you can also create nice skyboxes from these, see above
  
−
camera {
+
=== random planet texture generation ===
−
location <-1.5, 30, -150>
 
−
look_at <0, 25, 35>
 
−
angle 35
 
−
}
 
  
−
background { color rgb 0 }
+
idea (not tried yet) : random materials on the inside of a sphere with a spherical cam in the middle will produce a texture which can directly used with polar coordinates as texcoords.
  
−
// light_source { <100, 100, -200> color White }
+
seperate textures can be used for ground and (possibly multiple) cloud layers to animate.
  
 +
== projects using some of these ==
 +
i actually stumbled upon a project using some of my skyboxes =D enjoy
  
−
sphere { < 0, 0, 0>, 2
+
* http://sourceforge.net/projects/opengate/
−
pigment { rgbt 1 } // surface of sphere is transparent
 
−
interior {
 
−
media {
 
−
emission 0.02
 
−
intervals 1
 
−
samples 25
 
−
method 3
 
−
density {
 
−
spherical
 
−
ramp_wave
 
−
        translate 1.0*y  // replace 1.0 = t  by time for animation
 
−
        warp { turbulence 1.5 }
 
−
        translate -1.0*y // replace -1.0 = -t  by time for animation
 
−
color_map {
 
−
[0.0 color rgb <0, 0, 0>]
 
−
[0.1 color rgb <1, 0, 0>]
 
−
[0.5 color rgb <1, 1, 0>]
 
−
[1.0 color rgb <1, 1, 0>]
 
−
}
 
−
}
 
−
}
 
−
}
 
−
scale 25
 
−
translate 25*y
 
−
hollow
 
−
}
 
−
</pre>
 

Latest revision as of 12:49, 2 January 2011

see also

skybox

(this is hereby released under public domain)

placing a camera inside an explosion and maybe cutting out the interior gives nice skyboxes for spacegames (like http://sfz.schattenkind.net), see info below on how to generate such explosions/plasma effects

i suggest rendering stars onto the skybox ingame using dots or tiny billboards, this way they will look sharp even if the skybox is not ultra-highres.

space, bright red

  • Ghoulskybox1 bk.jpg
  • Ghoulskybox1 dn.jpg
  • Ghoulskybox1 fr.jpg
  • Ghoulskybox1 lf.jpg
  • Ghoulskybox1 up.jpg
  • Ghoulskybox1 rt.jpg

(these rendered images are hereby released under public domain)

see also http://sfz.schattenkind.net/wiki/index.php/Screenshots for more screenshots of those skyboxes in action

space, dark green

  • Ghoulskybox2 bk.jpg
  • Ghoulskybox2 dn.jpg
  • Ghoulskybox2 fr.jpg
  • Ghoulskybox2 lf.jpg
  • Ghoulskybox2 rt.jpg
  • Ghoulskybox2 up.jpg

  • here's how it looks in action with stars rendered onto it at runtime

(these rendered images are hereby released under public domain)

clouds

3 cloudy skyboxes

a few samples :

  • Cloudskybox bk.jpg
  • Cloudskybox2 dn.jpg
  • Cloudskybox3 up.jpg

(these rendered images and the .pov files are hereby released under public domain)

texture generation

  • todo : search .pov files for this
  • todo : camouflage texture...
  • also interesting : kwerkzeug (google)
  • Infrared.jpg
  • Camouflage.png

explosion

  • Pov exp1.png

http://ghoulsblade.schattenkind.net/files/pov/explosion01.pov

random explosion generation

i made a php script that would generated random colormaps and some random turbulence parameters and let it render all night long, producing one explosion image after another, and keeping the sources for later high-detail rendering of the good ones.

this is kind of bruteforcing artwork with enough processor power =)

also there are a few php scripts in there for comfortable viewing and marking the good ones, but you'll have to adjust them a bit.

here are a few samples :

  • Explode2.jpg
  • Plasma.jpg
  • Exp 001770 000.jpg
  • Exp 002112 000.jpg

  • macro particles

i generated a few thousand of those, you can find them and their sourcefiles (in breed) here : http://ghoulsblade.schattenkind.net/files/pov/povray_exploder/
(these are hereby released under public domain)
(the best ones are in exploder_nice.zip, ca 20mb, sourcefiles (.pov) included)

possible uses :

  • macro particles for explosions (see sample above)
  • billboard-textures for energy/plasma weapon-projectiles
  • basis for skyboxes for nebulae-like scenes in spacegames (see above)
  • basis for explosion animations (animate __TURBSTART__, see http://www.ogre3d.org/tikiwiki/POVRay+Explosions)
  • as background billboard for halo/hilighting effects
  • "shield hit" effects
  • wormholes/teleporter effects
  • cloud/nebulae particles (make color uniform)
  • some might look rather nice when used as spheremap or something like that in reflection effects
  • Rorschach test  ;)
  • ...


and here's the code :

http://ghoulsblade.schattenkind.net/files/pov/exploder.zip

warning ! requires quite a bit of harddisk space if you keep it running for a long time....

i give no warranty that your computer will not explode during the process ;)

you can also create nice skyboxes from these, see above

random planet texture generation

idea (not tried yet) : random materials on the inside of a sphere with a spherical cam in the middle will produce a texture which can directly used with polar coordinates as texcoords.

seperate textures can be used for ground and (possibly multiple) cloud layers to animate.

projects using some of these

i actually stumbled upon a project using some of my skyboxes =D enjoy

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