//Laura Berry
//LAURA'S ICOSAHEDRON
//adapted from EXAMPLE OF PYRAMID DEFINED BY THE COORDINATES OF ITS VERTICES AND POLYGONS
        
//presets//
#include "colors.inc"
#include "stones.inc"


//Camera//
camera {
  sky <0,0,1>          
  direction <-1,0,0>    
  right <-4/3,0,0>   
  location  <40,10,10>  //I moved camera out (increased X value) so object fits
  look_at   <0,0,0>    
  angle 5      
}

//Ambient light
global_settings { ambient_light White*2 }

//Spotlights
light_source {
  <10,10,10>   
  color White*2        
}                            // I combine white with color lights to make each triangular face stand out
light_source {
  <10,10,10>   
  color Blue*1        
}
light_source {
  <-10,-10,-3>   
  color Red*2                // I added a second light source so the lower left section is easier to see
}
light_source {
  <-10,-10,-3>   
  color White*4       
}

//background color
background { color SteelBlue }


//The Icosahedron

//The 12 vertices
#declare p1 = <.618,0,-1>;
#declare p2 = <-.618,0,-1>;
#declare p3 = <0,-1,.618>;
#declare p4 = <0,-1,-.618>;
#declare p5 = <-1,.618,0>;
#declare p6 = <-1,-.618,0>;
#declare p7 = <0,1,.618>;
#declare p8 = <0,1,-.618>;
#declare p9 = <1,.618,0>;
#declare p10 = <1,-.618,0>;
#declare p11 = <.618,0,1>;
#declare p12 = <-.618,0,1>;

//The 20 triangular faces
#declare f1 = polygon { 4, p1, p8, p9, p1};
#declare f2 = polygon { 4, p1, p10, p9, p1};
#declare f3 = polygon { 4, p1, p10, p4, p1};
#declare f4 = polygon { 4, p1, p2, p8, p1};
#declare f5 = polygon { 4, p1, p2, p9, p1};
#declare f6 = polygon { 4, p12, p7, p11, p12};
#declare f7 = polygon { 4, p12, p7, p5, p12};
#declare f8 = polygon { 4, p12, p5, p6, p12};
#declare f9 = polygon { 4, p12, p6, p3, p12};
#declare f10 = polygon { 4, p12, p3, p11, p12};
#declare f11 = polygon { 4, p3, p10, p11, p3};
#declare f12 = polygon { 4, p9, p10, p11, p9};
#declare f13 = polygon { 4, p7, p9, p11, p7};
#declare f14 = polygon { 4, p7, p8, p9, p7};
#declare f15 = polygon { 4, p5, p8, p7, p5};
#declare f16 = polygon { 4, p5, p2, p6, p5};
#declare f17 = polygon { 4, p2, p6, p9, p2};
#declare f18 = polygon { 4, p2, p5, p8, p2};
#declare f19 = polygon { 4, p2, p4, p6, p2};
#declare f20 = polygon { 4, p3, p4, p6, p3};   
   
//Unite the faces to form the icosahedron
#declare myicosahedron = object { union {
  object{f1}
  object{f2} 
  object{f3} 
  object{f4} 
  object{f5} 
  object{f6}
  object{f7} 
  object{f8} 
  object{f9} 
  object{f10}
  object{f11}
  object{f12} 
  object{f13} 
  object{f14} 
  object{f15} 
  object{f16}
  object{f17} 
  object{f18} 
  object{f19} 
  object{f20}
  }
  texture {T_Stone1}
  };

//Display the object
myicosahedron