// Simple Noah's Ark - corrected, fast iteration, simple shading
#version 3.7;

global_settings { assumed_gamma 1.0 }

background { color rgb <0.93, 0.96, 1.0> }

// -------------------- Camera --------------------
camera {
  location <0, 6.4, -18>
  look_at  <0, 3.2,  0>
  angle 35
}

// -------------------- Lights (warm + soft shadows) --------------------
light_source {
  <20, 22, -25>
  color rgb <1.0, 0.88, 0.72>*1.15
  area_light <6,0,0>, <0,0,6>, 5, 5
  adaptive 1
  jitter
}
light_source {
  <-18, 16, -12>
  color rgb <1.0, 0.90, 0.80>*0.55
  area_light <4,0,0>, <0,0,4>, 4, 4
  adaptive 1
  jitter
}

// -------------------- Simple materials --------------------
#declare WoodCol   = rgb <0.72, 0.48, 0.26>;
#declare TrimCol   = rgb <0.82, 0.66, 0.42>;
#declare DarkCol   = rgb <0.22, 0.17, 0.12>;
#declare GlassCol  = rgb <0.65, 0.82, 0.95>;

#declare FinWood  = finish { diffuse 0.85 specular 0.15 roughness 0.06 };
#declare FinTrim  = finish { diffuse 0.85 specular 0.12 roughness 0.07 };
#declare FinDark  = finish { diffuse 0.90 specular 0.05 roughness 0.10 };
#declare FinGlass = finish { diffuse 0.25 specular 0.35 roughness 0.03 };

// -------------------- Ground plane (subtle) --------------------
plane {
  y, 0
  pigment { color rgb <0.98, 0.98, 0.99> }
  finish  { diffuse 0.9 specular 0.05 roughness 0.12 }
}

// -------------------- Ark dimensions --------------------
#declare Hull_L = 12.0;
#declare Hull_W = 4.2;
#declare Hull_H = 3.2;

#declare Cabin_L = 7.2;
#declare Cabin_W = 3.3;
#declare Cabin_H = 2.1;

#declare Roof_Over = 0.65;
#declare Roof_H    = 1.2;

// Convenient base height
#declare BaseY = 0.8;

// -------------------- Ark model --------------------
union {

  // ---- Hull (simple rounded boat) ----
  difference {
    union {
      // Main rounded volume (ellipsoid)
      sphere { <0, BaseY + Hull_H*0.62, 0>, 1
        scale <Hull_L*0.52, Hull_H*0.70, Hull_W*0.55>
      }
      // Slightly boxier mid-body to read more like the reference
      box {
        <-Hull_L*0.46, BaseY + Hull_H*0.55, -Hull_W*0.50>,
        < Hull_L*0.46, BaseY + Hull_H*1.05,  Hull_W*0.50>
      }
    }
    // Flatten bottom (keel cut)
    box { <-50, -50, -50>, <50, BaseY + 0.62, 50> }

    pigment { color WoodCol }
    finish  { FinWood }
  }

  // ---- Deck line trim band ----
  box {
    <-Hull_L*0.46, BaseY + Hull_H*0.72, -Hull_W*0.52>,
    < Hull_L*0.46, BaseY + Hull_H*0.80,  Hull_W*0.52>
    pigment { color TrimCol }
    finish  { FinTrim }
  }

  // ---- Cabin block ----
  box {
    <-Cabin_L/2, BaseY + Hull_H*0.98, -Cabin_W/2>,
    < Cabin_L/2, BaseY + Hull_H*0.98 + Cabin_H,  Cabin_W/2>
    pigment { color WoodCol*0.92 }
    finish  { FinWood }
  }

  // ---- Window (on +Z face) ----
  // Recess
  box {
    <-2.0, BaseY + Hull_H*0.98 + 0.65,  Cabin_W/2-0.02>,
    < 2.0, BaseY + Hull_H*0.98 + 1.55,  Cabin_W/2+0.20>
    pigment { color DarkCol }
    finish  { FinDark }
  }
  // Frame
  difference {
    box {
      <-2.25, BaseY + Hull_H*0.98 + 0.55, Cabin_W/2-0.01>,
      < 2.25, BaseY + Hull_H*0.98 + 1.65, Cabin_W/2+0.10>
    }
    box {
      <-2.00, BaseY + Hull_H*0.98 + 0.70, Cabin_W/2-0.02>,
      < 2.00, BaseY + Hull_H*0.98 + 1.50, Cabin_W/2+0.12>
    }
    pigment { color TrimCol }
    finish  { FinTrim }
  }
  // Glass
  box {
    <-1.95, BaseY + Hull_H*0.98 + 0.72, Cabin_W/2+0.02>,
    < 1.95, BaseY + Hull_H*0.98 + 1.48, Cabin_W/2+0.06>
    pigment { color GlassCol }
    finish  { FinGlass }
  }

  // ---- Roof (single clean CSG to avoid prior parser error) ----
  difference {
    // Roof slab
    box {
      <-Cabin_L/2-Roof_Over, BaseY + Hull_H*0.98 + Cabin_H, -Cabin_W/2-Roof_Over>,
      < Cabin_L/2+Roof_Over, BaseY + Hull_H*0.98 + Cabin_H + Roof_H,  Cabin_W/2+Roof_Over>
    }

    // Cut to create a simple pitched roof
    plane { <0, 0.85,  1>, (BaseY + Hull_H*0.98 + Cabin_H) + 0.42 }
    plane { <0, 0.85, -1>, (BaseY + Hull_H*0.98 + Cabin_H) + 0.42 }

    pigment { color TrimCol }
    finish  { FinTrim }
  }

  // ---- Portholes (rings) on visible side (+Z) ----
  #declare PZ = Hull_W*0.55 + 0.10;
  #declare PH = BaseY + Hull_H*0.62;

  #declare i = 0;
  #while (i < 4)
    #declare px = -4.2 + i*2.8;
    union {
      difference {
        cylinder { <px, PH, PZ>, <px, PH, PZ+0.18>, 0.45 }
        cylinder { <px, PH, PZ-0.01>, <px, PH, PZ+0.22>, 0.28 }
        pigment { color TrimCol }
        finish  { FinTrim }
      }
      cylinder { <px, PH, PZ+0.04>, <px, PH, PZ+0.16>, 0.24
        pigment { color DarkCol }
        finish  { FinDark }
      }
    }
    #declare i = i + 1;
  #end

} // end ark union

// -------------------- Back wall (clean studio) --------------------
plane {
  z, 20
  pigment { color rgb <0.95, 0.96, 0.98> }
  finish  { diffuse 0.9 }
}