//csgDemo
//Andy Harris


// 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
  // <widthVector> <heightVector> nLightsWide mLightsHigh
  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
  translate <40, 80, -40>   // <x y z> position of light
}
  
camera
{
  location  <0.0 , 1.0 ,-5.0>
  look_at   <0.0 , 1.0 , 0.0>
}

background{ 
  rgb <1, 1, 1>
}

//replace the word 'union' with 'difference', merge, and 'intersection' 
union {

  // create a box that extends between the 2 specified points
  box  {
    <-.2, 0, -2>  // one corner position <X1 Y1 Z1>
    < .2,  2,  2>  // other corner position <X2 Y2 Z2> 
    pigment {
      color rgbf <1 .8 .8 .8>
    } // end pigment  
  } // end box   
  
  cylinder {
    <-1, 1, 0>
    <1, 1, 0>, 1
    pigment {
      color rgbf<.8 .8 1 .8>
    } // end pigment
  } // end cylinder 
  rotate y* 30
} // end union