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POVRay Explosions        
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A little pov-ray script to generate explosion effects and similar plasma things for use as textures on billboards.

Replace in the following pov script:

  • TURBULENCE by a float of how turbulent the effect should be, maybe 0.2 + 0.6 * frand()
  • TURBSTART by a float to be used as seed for the effect maybe 100 * frand() (can be animated when stepping with stepsize < 1.0 or so)
  • EMISSION by a float how bright the effect should be, maybe 0.6 + 0.5 * frand()
  • COLORMAP by a colormap, like this:



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[ 0.000  0.270 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.270  0.280 color rgb <.5,.5,.4> color rgb <.8,.8,.4> ]
            [ 0.280  0.470 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.470  0.480 color rgb <.4,.4,.5> color rgb <.4,.4,.8> ]
            [ 0.480  0.680 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.680  0.690 color rgb <.5,.4,.4> color rgb <.8,.4,.4> ]
            [ 0.690  0.880 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]
            [ 0.880  0.890 color rgb <.5,.5,.5> color rgb < 1, 1, 1> ]
            [ 0.890  1.000 color rgb < 0, 0, 0> color rgb < 0, 0, 0> ]

Here is the .pov file :

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//    Persistence of Vision Raytracer Version 3.5 Scene Description File
    //
    //*******************************************

    global_settings {
      //max_trace_level 5
    }

    #include "colors.inc"

    camera {
      location <0,0,-2.3>
      //angle 90
      right <1,0,0> up <0,1,0>
      // clock
    }

    background { color rgb <0,0,0> }

    sphere { < 0, 0, 0>, 4
        // pigment { rgbt 1 } // surface of sphere is transparent
        pigment { rgbt 1 } // surface of sphere is transparent
        interior {
            media {
                emission __EMISSION__
                intervals 1
                samples 33
                method 3
                density {
                    spherical
                    ramp_wave
            translate (__TURBSTART__ + clock*1.0)*y  // replace 1.0 = t   by time for animation
            warp { turbulence __TURBULENCE__ }
            translate -(__TURBSTART__ + clock*1.0)*y // replace -1.0 = -t  by time for animation
                    color_map {
                        [0.0 color rgb <0, 0, 0>]
              __COLORMAP__
                    }
                }
          scale 0.7
            }
        }
        //translate 25*y
        hollow
    }


I also made a php script to generate lots of random explosions over night,
so I can pick out the good ones later, for that and a few more notes on povray see

http://ghoulsblade.schattenkind.net/wiki/index.php/Povray samples:


I generated a few thousands of those, they can be downloaded (including source/breed .pov files) under
http://ghoulsblade.schattenkind.net/files/pov/povray_exploder/

(feel free to use what you like, they are under public domain). They can also be generated to create nice spacy skyboxes.

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