#version 3.7;

global_settings {
  assumed_gamma 1.0
  max_trace_level 8
}

background { color rgb <0.88, 0.93, 1.0> }

camera {
  location <22, 16, -28>
  look_at  <0, 6, 0>
  angle 38
}

light_source { <60, 80, -40> color rgb <1.0, 0.98, 0.95> }
light_source { <-30, 25, -10> color rgb <0.35, 0.40, 0.50> shadowless }

plane {
  y, 0
  texture {
    pigment { color rgb <0.86, 0.86, 0.88> }
    finish { diffuse 0.85 specular 0.05 roughness 0.08 }
  }
}

#declare T_Concrete =
texture {
  pigment { color rgb <0.78, 0.79, 0.80> }
  finish { diffuse 0.85 specular 0.10 roughness 0.04 }
};

#declare T_Concrete_Dark =
texture {
  pigment { color rgb <0.32, 0.34, 0.36> }
  finish { diffuse 0.80 specular 0.18 roughness 0.05 }
};

#declare T_Glass =
texture {
  pigment { color rgbt <0.70, 0.85, 0.95, 0.70> }
  finish { diffuse 0.15 specular 0.65 roughness 0.01 reflection 0.10 }
};

#declare T_Metal =
texture {
  pigment { color rgb <0.18, 0.19, 0.21> }
  finish { diffuse 0.55 specular 0.55 roughness 0.03 reflection 0.08 }
};

#declare Building =
union {
  // Main core
  box { <-4, 0, -4>, < 4, 14,  4> texture { T_Concrete } }

  // Side wings
  box { <-14, 0, -3>, <-4, 9,  3> texture { T_Concrete } }
  box { <  4, 0, -3>, <14, 10, 3> texture { T_Concrete } }

  // Upper terraces / stepped volumes
  box { <-10, 9, -5>, <-2, 12, 5> texture { T_Concrete_Dark } }
  box { <  2, 10, -6>, <10, 13, 6> texture { T_Concrete_Dark } }
  box { <-3, 14, -3>, < 3, 16, 3> texture { T_Metal } }

  // Cantilever slabs
  box { <-6, 6.8, -8>, < 6, 7.4, -4.2> texture { T_Concrete_Dark } }
  box { <-8, 4.2,  4.2>, < 8, 4.8, 8> texture { T_Concrete_Dark } }

  // Two tower cylinders
  cylinder { <-12, 0, 7>, <-12, 12, 7>, 2.3 texture { T_Concrete } }
  cylinder { < 12, 0, -7>, < 12, 15, -7>, 2.0 texture { T_Concrete } }

  // Glass bands / curtain wall panels (simple boxes)
  box { <-3.7, 2.2, -4.05>, <3.7, 11.5, -3.65> texture { T_Glass } }
  box { <-3.7, 2.2,  3.65>, <3.7, 11.5,  4.05> texture { T_Glass } }
  box { <-4.05, 3.0, -3.7>, <-3.65, 11.0, 3.7> texture { T_Glass } }
  box { < 3.65, 3.0, -3.7>, < 4.05, 11.0, 3.7> texture { T_Glass } }

  // Dark accent frames
  box { <-14, 0, -3.2>, <14, 0.35, 3.2> texture { T_Metal } }
  box { <-5.2, 13.7, -5.2>, <5.2, 14.2, 5.2> texture { T_Metal } }
};

#declare AtriumCuts =
union {
  // Central atrium void
  box { <-1.6, 0.2, -1.6>, <1.6, 11.8, 1.6> }

  // Big side passage cut through left wing
  box { <-11.5, 1.0, -1.2>, <-6.0, 6.5, 1.2> }

  // Notch on right wing
  box { <6.2, 2.0, -3.1>, <12.5, 7.5, -0.8> }
};

difference {
  object { Building }
  object { AtriumCuts }
  translate <0, 0, 0>
}

// A few simple ground shadows/helpers: plinth and walkway
box {
  <-16, 0.01, -10>, <16, 0.25, 10>
  texture {
    pigment { color rgb <0.74, 0.74, 0.76> }
    finish { diffuse 0.85 specular 0.06 roughness 0.08 }
  }
}

box {
  <-18, 0.005, -2>, <18, 0.02, 2>
  texture {
    pigment { color rgb <0.62, 0.62, 0.65> }
    finish { diffuse 0.85 specular 0.03 roughness 0.10 }
  }
  translate <0, 0, -13>
}