#version 3.7;

global_settings {
    assumed_gamma 1.3 max_trace_level 16
    radiosity {
        pretrace_start 0.08
        pretrace_end   0.01
        count 200
        nearest_count 10
        error_bound 0.5
        recursion_limit 2
        low_error_factor 0.5
        gray_threshold 0.0
    }
}

background { color rgb <0.05, 0.07, 0.10> }

camera {
  location <42, 22, -58>
  look_at  <0, 10, 0>
  angle 40
  up <0,9,0>
  right <16,0,0>  // right,up -> 16:9
}

// Warm, soft lights
light_source {
  <80, 90, -60>
  color rgb <1.0, 0.78, 0.60>*1.15
  area_light <18,0,0>, <0,0,18>, 6, 6
  adaptive 1
  jitter
}

light_source {
  <-70, 55, -20>
  color rgb <1.0, 0.82, 0.65>*0.55
  area_light <14,0,0>, <0,0,14>, 5, 5
  adaptive 1
  jitter
}

light_source {
  <0, 120, 0>
  color rgb <1.0, 0.90, 0.80>*0.25
}

// Atmospheric haze
fog {
  fog_type 2
  distance 140
  color rgb <0.12, 0.14, 0.18>
  fog_offset 0
  fog_alt 12
  turbulence 0.6
}

// --- Simple materials (no image textures) ---
#declare Mat_Concrete = texture {
  pigment { color rgb <0.20, 0.22, 0.26> }
  finish { diffuse 0.75 specular 0.10 roughness 0.05 }
};

#declare Mat_DarkMetal = texture {
  pigment { color rgb <0.12, 0.13, 0.15> }
  finish { diffuse 0.60 specular 0.25 roughness 0.03 }
};

#declare Mat_Glass = texture {
  pigment { color rgbt <0.20, 0.35, 0.45, 0.65> }
  finish { diffuse 0.10 specular 0.45 roughness 0.01 reflection 0.10 }
};

#declare Mat_LightCyan = texture {
  pigment { color rgb <0.25, 0.85, 0.95> }
  finish { diffuse 0.40 specular 0.25 roughness 0.02 ambient 0.0 }
};

#declare Mat_LightMagenta = texture {
  pigment { color rgb <0.95, 0.30, 0.75> }
  finish { diffuse 0.40 specular 0.25 roughness 0.02 ambient 0.0 }
};

#declare Mat_LightAmber = texture {
  pigment { color rgb <1.0, 0.70, 0.25> }
  finish { diffuse 0.45 specular 0.20 roughness 0.03 ambient 0.0 }
};

#declare Mat_Road = texture {
  pigment { color rgb <0.06, 0.07, 0.08> }
  finish { diffuse 0.9 specular 0.05 roughness 0.08 }
};

// --- Ground + base slab ---
plane { y, 0 texture { Mat_Road } }

box {
  <-120, 0, -120>, <120, 0.6, 120>
  texture { Mat_DarkMetal }
}

// --- Macros ---
#macro Building(BaseX, BaseZ, W, D, H, StepCount, StepInset)
  union {
    // stepped massing
    #local i = 0;
    #while (i < StepCount)
      #local w2 = W - 2*StepInset*i;
      #local d2 = D - 2*StepInset*i;
      #local hh = (H/StepCount)*0.70;     // per-step height
      #local y0 = 0.6 + i*(H/StepCount)*0.55;

      #if (w2 < 1) #local w2 = 1; #end
      #if (d2 < 1) #local d2 = 1; #end

      box {
        <BaseX - w2/2, y0, BaseZ - d2/2>,
        <BaseX + w2/2, y0 + hh, BaseZ + d2/2>
        texture { Mat_Concrete }
      }
      #local i = i + 1;
    #end

    // crown block
    box {
      <BaseX - W*0.40, 0.6 + H*0.55, BaseZ - D*0.40>,
      <BaseX + W*0.40, 0.6 + H*0.95, BaseZ + D*0.40>
      texture { Mat_DarkMetal }
    }

    // antenna mast + tip
    cylinder {
      <BaseX, 0.6 + H*0.95, BaseZ>, <BaseX, 0.6 + H*1.10, BaseZ>, W*0.06
      texture { Mat_DarkMetal }
    }
    cone {
      <BaseX, 0.6 + H*1.10, BaseZ>, W*0.06,
      <BaseX, 0.6 + H*1.22, BaseZ>, 0.0
      texture { Mat_LightCyan }
    }

    // window bands
    #local bandCount = 7;
    #local b = 0;
    #while (b < bandCount)
      #local yy = 0.6 + H*(0.10 + 0.11*b);

      box {
        <BaseX - W*0.49, yy,      BaseZ - D*0.49>,
        <BaseX + W*0.49, yy+0.25, BaseZ + D*0.49>
        texture {
          pigment { color rgb <0.10, 0.12, 0.14> }
          finish { diffuse 0.35 specular 0.25 roughness 0.02 }
        }
      }
      box {
        <BaseX - W*0.47, yy+0.05, BaseZ - D*0.47>,
        <BaseX + W*0.47, yy+0.20, BaseZ + D*0.47>
        texture { Mat_Glass }
      }

      #local b = b + 1;
    #end
  }
#end

#macro SignPanel(Cx, Cy, Cz, W, H, ColTex)
  box {
    <Cx - W/2, Cy - H/2, Cz - 0.08>,
    <Cx + W/2, Cy + H/2, Cz + 0.08>
    texture { ColTex }
  }
#end

#macro SkyBridge(X1,Z1, X2,Z2, Y, W)
  union {
    box {
      <min(X1,X2)-W/2, Y-0.6, min(Z1,Z2)-W/2>,
      <max(X1,X2)+W/2, Y+0.6, max(Z1,Z2)+W/2>
      texture { Mat_DarkMetal }
    }
    box {
      <min(X1,X2)-W*0.45, Y-0.35, min(Z1,Z2)-W*0.45>,
      <max(X1,X2)+W*0.45, Y+0.35, max(Z1,Z2)+W*0.45>
      texture { Mat_Glass }
    }
  }
#end

#macro TransitTube(P1, P2, R)
  union {
    cylinder { P1, P2, R      texture { Mat_DarkMetal } }
    cylinder { P1, P2, R*0.78 texture { Mat_Glass } }
    // thin glow core (still simple, not emissive)
    cylinder { P1, P2, R*0.10 texture { Mat_LightAmber } }
  }
#end

#macro LowBlock(Cx,Cz,W,D,H, T)
  box { <Cx-W/2, 0.6, Cz-D/2>, <Cx+W/2, 0.6+H, Cz+D/2> texture { T } }
#end

// --- City core ---
union {
  // main towers
  Building(  0,   0, 18, 18, 36, 6, 1.0)
  Building( 18,  -8, 14, 12, 28, 5, 0.9)
  Building(-18,   6, 16, 14, 30, 6, 0.9)
  Building( 10,  18, 12, 12, 24, 5, 0.8)
  Building(-10, -18, 12, 16, 26, 5, 0.8)

  // secondary towers
  Building( 34,  10, 10, 10, 20, 4, 0.7)
  Building( 34, -18, 10, 14, 22, 4, 0.7)
  Building(-34,  16, 12, 10, 22, 4, 0.7)
  Building(-34, -12, 10, 12, 20, 4, 0.7)

  // skybridges
  SkyBridge(-18,  6,   0,  0, 16, 3.5)
  SkyBridge(  0,  0,  18, -8, 14, 3.5)
  SkyBridge(-10,-18,  10, 18, 12, 2.8)

  // transit tubes
  TransitTube(<-60, 10, -40>, < 60, 12, -10>, 1.6)
  TransitTube(<-55, 14,  30>, < 55, 15,  10>, 1.4)
  TransitTube(<-30, 18, -70>, < 10, 19,  70>, 1.2)

  // hover platforms
  #declare PlatTex = texture {
    pigment { color rgb <0.10,0.11,0.13> }
    finish { diffuse 0.55 specular 0.25 roughness 0.03 }
  };

  union {
    cylinder { <22, 9.5,  8>, <22, 10.0,  8>, 4.2 texture { PlatTex } }
    torus { 4.2, 0.25 rotate <90,0,0> translate <22,10.0, 8> texture { Mat_LightCyan } }
  }
  union {
    cylinder { <-26, 11.0, -6>, <-26, 11.5, -6>, 3.6 texture { PlatTex } }
    torus { 3.6, 0.22 rotate <90,0,0> translate <-26,11.5,-6> texture { Mat_LightMagenta } }
  }

  // neon signage
  SignPanel(  9,  9.5,  8.8, 5.5, 2.0, Mat_LightMagenta)
  SignPanel( -7, 13.0, -8.2, 6.0, 2.2, Mat_LightCyan)
  SignPanel( 18.8, 11.0, -8.0, 4.0, 1.8, Mat_LightAmber)
}

// --- Outer low-rise blocks for depth + elevated ring road ---
union {
  LowBlock(-70, -30, 18, 14, 7, Mat_Concrete)
  LowBlock(-85, -10, 14, 18, 6, Mat_DarkMetal)
  LowBlock(-78,  20, 20, 16, 7, Mat_Concrete)

  LowBlock( 70, -28, 18, 18, 7, Mat_Concrete)
  LowBlock( 86,  -6, 16, 20, 6, Mat_DarkMetal)
  LowBlock( 78,  24, 22, 16, 7, Mat_Concrete)

  // elevated ring road
  torus { 58, 1.10 rotate <90,0,0> translate <0, 7.2, 0> texture { Mat_DarkMetal } }
  torus { 58, 0.65 rotate <90,0,0> translate <0, 7.2, 0> texture { Mat_Glass } }
  torus { 58, 0.18 rotate <90,0,0> translate <0, 7.2, 0> texture { Mat_LightAmber } }
}