// Persistence of Vision Ray Tracer Scene Description File
// File: ?.pov
// Vers: 3.5
// Desc: Slope bugs
// Date: mm/dd/yy
// Auth: ?
//

#version 3.5;

global_settings {
  assumed_gamma 1.0
}

// ----------------------------------------

camera {
  location  <0.0, 0.0, -10.0>
  direction 1.5*z
  right     x*image_width/image_height
  look_at   <0.0, 0.0,  0.0>
}

sky_sphere {
  pigment {
    gradient y
    color_map {
      [0.0 rgb <0.6,0.7,1.0>]
      [0.7 rgb <0.0,0.1,0.8>]
    }
  }
}

light_source {
  <0, 0, 0>            // light's position (translated below)
  color rgb <1, 1, 1>  // light's color
  translate <-30, 30, -30>
  shadowless
}

// ----------------------------------------

plane {
  -z, -1
  pigment { 
    hexagon 
    color rgb 1.0 
    color rgb 0.5 
    color rgb 0.1
    scale 1.5 
    rotate 90*x
  }
}

// ----------------------------------------

#declare F1 = finish { diffuse 0 ambient 1 reflection 0 specular 0 }
#declare F2 = finish { diffuse 1 ambient 0 reflection 0 specular 0 }
#declare F3 = finish { phong 0.4 }

#declare X1F = pigment { color rgbf < 1, 1, 0, 0 > }
#declare X2F = pigment { color rgbf < 0, 0, 1, 1 > }
#declare X1T = pigment { color rgbt < 1, 1, 0, 0 > }
#declare X2T = pigment { color rgbt < 0, 0, 1, 1 > }
#declare X1O = pigment { color rgb  < 1, 1, 0 > }
#declare X2O = pigment { color rgb  < 0, 0, 1 > }

#declare S1 =  pigment { slope y                   pigment_map { [ 0 X1F ] [ 1 X2F ] }}
#declare S2 =  pigment { slope y                   pigment_map { [ 0 X1T ] [ 1 X2T ] }}
#declare S3 =  pigment { slope y                   pigment_map { [ 0 X1O ] [ 1 X2O ] }}
#declare G1 =  pigment { function {0.5+asin(y)/pi} pigment_map { [ 0 X1F ] [ 1 X2F ] }}
#declare G2 =  pigment { function {0.5+asin(y)/pi} pigment_map { [ 0 X1T ] [ 1 X2T ] }}
#declare G3 =  pigment { function {0.5+asin(y)/pi} pigment_map { [ 0 X1O ] [ 1 X2O ] }}

#declare sphere_tex_1 = texture { pigment { S1 } finish { F1 }}
#declare sphere_tex_2 = texture { pigment { S2 } finish { F1 }}
#declare sphere_tex_3 = texture { pigment { S1 } finish { F2 }}
#declare sphere_tex_4 = texture { pigment { S2 } finish { F2 }}
#declare sphere_tex_9 = texture { pigment { S3 } finish { F3 }}

#declare sphere_tex_5 = texture { pigment { G1 } finish { F1 }}
#declare sphere_tex_6 = texture { pigment { G2 } finish { F1 }}
#declare sphere_tex_7 = texture { pigment { G1 } finish { F2 }}
#declare sphere_tex_8 = texture { pigment { G2 } finish { F2 }}
#declare sphere_tex_10 = texture { pigment { G3 } finish { F3 }}



// Left side group: Buggy 'slope' thing.
union {
    sphere {0, 1 texture { sphere_tex_1 } translate  x+y}
    sphere {0, 1 texture { sphere_tex_2 } translate -x+y}
    sphere {0, 1 texture { sphere_tex_3 } translate  x-y}
    sphere {0, 1 texture { sphere_tex_4 } translate -x-y}
    sphere {0, 1 texture { sphere_tex_9 } translate 3*y}

    translate -2.2*x-y
}

// Right side group: 'correct' function
union {
    sphere {0, 1 texture { sphere_tex_5 } translate  x+y}
    sphere {0, 1 texture { sphere_tex_6 } translate -x+y}
    sphere {0, 1 texture { sphere_tex_7 } translate  x-y}
    sphere {0, 1 texture { sphere_tex_8 } translate -x-y}
    sphere {0, 1 texture { sphere_tex_10 } translate 3*y}

    translate 2.2*x-y
}