// ==== Standard POV-Ray Includes ====
#include "colors.inc"	  // Standard Color definitions
#include "textures.inc"	  // Standard Texture definitions
#include "functions.inc"  // internal functions usable in user defined functions// create a sphere shape
#include "../include/textures.inc"

// perspective (default) camera
camera {
  location  <0.0, 2.0, -5.0>
  look_at   <0.0, 0.0,  0.0>
  right     x*image_width/image_height
}


global_settings{
        assumed_gamma 1.3

        radiosity{
            pretrace_start 1 
            pretrace_end   1
            count 400 
            error_bound 0.05 
            nearest_count 1        // CHANGE - range from 1 to 3 - should correspond with pretrace_end
            recursion_limit 1    // CHANGE
            low_error_factor 1  // leave this
            gray_threshold 0   // leave this
            minimum_reuse 0.015  // leave this
            brightness 1         // leave this
            adc_bailout 0.01/2   // CHANGE - use adc_bailo        
        }
/*
  photons {
    spacing 0.01                 // specify the density of photons
    //count 100000               // alternatively use a total number of photons

    //gather min, max            // amount of photons gathered during render [20, 100]
    //media max_steps [,factor]  // media photons
    //jitter 1.0                 // jitter phor photon rays
    //max_trace_level 5          // optional separate max_trace_level
    //adc_bailout 1/255          // see global adc_bailout
    //save_file "filename"       // save photons to file
    //load_file "filename"       // load photons from file
    //autostop 0                 // photon autostop option
    //radius 10                  // manually specified search radius
    // (---Adaptive Search Radius---)
    //steps 1
    //expand_thresholds 0.2, 40
  }
*/
}


 
background { color White }
//background { color Black }

// An area light (creates soft shadows)
// WARNING: This special light can significantly slow down rendering times!
/*
light_source {
  0*x                 // light's position (translated below)
  color rgb 1.0       // light's color
  area_light
  <8, 0, 0> <0, 0, 8> // lights spread out across this distance (x * z)
  4, 4                // total number of lights in grid (4x*4z = 16 lights)
  adaptive 0          // 0,1,2,3...
  jitter              // adds random softening of light
  circular            // make the shape of the light circular
  orient              // orient light
  translate <40, 80, -40>   // <x y z> position of light
}
*/


light_source { <-2000, 1000, -2000> color White }
/*
sphere {
  <0, 0, 0> // center of sphere <X Y Z>
  1       // radius of sphere
  // scale <1,2,1> // <= Note: Spheres can become ellipses by uneven scaling
  texture { Aluminum2 }
}
*/

#declare Triangle=union {
  triangle { <-1,0,1>,<0,1,0>,<1,0,1> }
  triangle { <1,0,1>,<0,1,0>,<1,0,-1> }
  triangle { <-1,0,-1>,<0,1,0>,<1,0,-1> }
  triangle { <-1,0,1>,<0,1,0>,<-1,0,-1> }
  scale .5
}

#macro TriRing(start_y, end_y, step_y)
union {
    #local step_ang = 6;
    #local pos_y = start_y;
    #while (pos_y <= end_y)
        #local ang = 0;
        #while (ang < 360)
            object { Triangle scale .125 rotate<-90,0,0> translate<0,pos_y,-1> rotate<0,ang,0> }
            #local ang = ang + step_ang;
        #end
        #local pos_y = pos_y + step_y;
    #end
}
#end

#declare BoltTop=union {
  cylinder { <0,-.3125,0>,<0,.3125,0>,1 }
  cylinder { <0,.3125,0>,<0,.4375,0>,1.0625 }
  cylinder { <0,-.3125,0>,<0,-.4375,0>,1.0625 }
  difference {
    union {
      torus { .8125,.25 }
      cylinder { <0,-.25,0>,<0,.25,0>,.8125 }
    }
    box { <-10,-10,-10>,<10,0,10> }
    cylinder { <0,-.125,.5>,<0,1,.5>,.16 }
    cylinder { <0,-.125,-.5>,<0,1,-.5>,.16 }
    cylinder { <-.4,-.125,0>,<-.4,1,0>,.16 }
    cylinder { <.4,-.125,0>,<.4,1,0>,.16 }
    cylinder { <0,-.125,0>,<0,1,0>,.32 }
    box { <-.16,-.125,.5>,<.16,1,-.5> }
    box { <-.4,-.125,-.16>,<.4,1,.16> }

    sphere { <0,.41,.5>,.26 }
    sphere { <0,.41,-.5>,.26 }
    sphere { <-.4,.41,0>,.26 }
    sphere { <.4,.41,0>,.26 }
    sphere { <0,.41,0>,.42 }
    cylinder { <0,.41,.5>,<0,.41,-.5>,.26 }
    cylinder { <-.4,.41,0>,<.4,.41,0>,.26 }
    translate<0,.4375,0>
  }
  cylinder { <0,-.4375,0>,<0,-.5,0>,1 }
  TriRing(-.25, .25, .125)
  texture { Aluminum2 }
}

object { 
    BoltTop
    rotate <0, 10, 0>
    rotate <-15 ,0 ,0> 
}

// An infinite planar surface
// plane {<A, B, C>, D } where: A*x + B*y + C*z = D


plane {
  y, // <X Y Z> unit surface normal, vector points "away from surface"
  -1.0 // distance from the origin in the direction of the surface normal
  hollow on // has an inside pigment?
  texture { 
    pigment { color White }
  }
}