// Persistence of Vision Ray Tracer Scene Description File
// File: wwhelmets.pov
// Vers: 3.1
// Desc: A few WW helmets
// Date: 00.49
// Auth: Bob Hughes
// Mail: inv### [at] aolcom?Subject=PoV-Scene
// Note: these are NOT helmets based on real measurements, etc.
//       use anywhere, anytime, and change in whatever way freely.

// lights, camera...
light_source { <1,2,-10>, 1.5}
camera {
  location  <0,1,-7>
  angle 25
  look_at   <0,0,0>
}

// A for American, G for German, B for British
#declare Helmet="A"

#declare HelmetType=asc(strupr(Helmet));

// ...action!

// crude approximation of world war helmet
#declare WWIIHelmetA=
lathe { cubic_spline
        25,
        <-.01,-.001>,
        <0,0>,
        <.125,.01>,
        <.25,.025>,
        <.35,.055>,
        <.475,.125>,
        <.575,.225>,
        <.625,.315>,
        <.667,.4125>,
        <.70125,.525>,
        <.767,.725>,
        <.89,.85>,
        <.9,.88>,
        <.86,.86>,
        <.733,.733>,
        <.67,.533>,
        <.633,.425>,
        <.59,.325>,
        <.525,.225>,
        <.425,.133>,
        <.3,.067>,
        <.25,.055>,
        <.125,.045>,
        <0,.033>,
        <-0.01,-.001>
 // sturm
}

// difference { // for cutaway view
object {WWIIHelmetA//} // use brace for cutaway view
// plane {z,0}  // for cutaway view
#switch (HelmetType)
#case (65)
  scale <.95,1,1.15> // American
 rotate 180*z translate .888*y // place approx. onto y*0 plane
 pigment {rgb<.3,.475,.33>} // American
#break
#case (71)
  scale <1,1.05,1.1> // German (shape is not correct at all)
 rotate 180*z translate .93*y // place approx. onto y*0 plane
 pigment {rgb<.33,.45,.4>} // German
#break
#case (66)
  scale <.95,.5,1.15> // British (WWI)
 rotate 180*z translate .45*y // place approx. onto y*0 plane
 pigment {rgb<.4,.45,.3>} // British (WWI)
#break
#end
  finish {ambient .075 diffuse .5 specular .25 roughness .01 phong .05
phong_size 5
         metallic .25 brilliance .75 reflection .05}
 // rotate 360*clock*<1,1,0> // for 360 degree animation
}

// plane {y,0 pigment {rgb 1}}

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