// Neat European-style summer castle (fast iteration scene)
#version 3.7;

global_settings {
  assumed_gamma 1.0
  max_trace_level 8
}

background { color rgb <0.60, 0.82, 1.00> }

// --- Camera ---
camera {
  location <0, 10.5, -24>
  look_at  <0, 6.0, 0>
  angle 38
}

// --- Lights (warm + soft shadows) ---
light_source {
  <40, 55, -30>
  color rgb <1.00, 0.92, 0.80>*1.15
  area_light <6,0,0>, <0,0,6>, 4, 4
  adaptive 1
  jitter
}

light_source {
  <-25, 25, -10>
  color rgb <0.95, 0.97, 1.00>*0.35
  area_light <4,0,0>, <0,0,4>, 3, 3
  adaptive 1
  jitter
}

// --- Sky gradient plane (cheap) ---
plane {
  y, 1
  pigment {
    gradient y
    color_map {
      [0.00 color rgb <0.60, 0.82, 1.00>]
      [0.55 color rgb <0.78, 0.92, 1.00>]
      [1.00 color rgb <0.98, 0.99, 1.00>]
    }
    scale 120
    translate -60
  }
  finish { ambient 1 diffuse 0 }
  hollow
}

// --- Materials ---
#declare StonePig = pigment {
  granite
  color_map {
    [0.00 color rgb <0.82, 0.80, 0.75>]
    [0.55 color rgb <0.74, 0.72, 0.68>]
    [1.00 color rgb <0.88, 0.86, 0.82>]
  }
  scale 0.55
};

#declare StoneFinish = finish {
  diffuse 0.85
  specular 0.10
  roughness 0.06
};

#declare StoneTex = texture {
  StonePig
  normal { bumps 0.30 scale 0.20 }
  finish { StoneFinish }
};

#declare RoofTex = texture {
  pigment { color rgb <0.34, 0.26, 0.22> }
  normal { bumps 0.25 scale 0.18 }
  finish { diffuse 0.85 specular 0.12 roughness 0.08 }
};

#declare DarkWoodTex = texture {
  pigment { color rgb <0.25, 0.17, 0.10> }
  normal { bumps 0.30 scale 0.20 }
  finish { diffuse 0.85 specular 0.08 roughness 0.10 }
};

#declare GrassTex = texture {
  pigment {
    bozo
    color_map {
      [0.00 color rgb <0.25, 0.55, 0.22>]
      [0.55 color rgb <0.30, 0.62, 0.24>]
      [1.00 color rgb <0.18, 0.45, 0.18>]
    }
    scale 3.0
  }
  normal { bumps 0.35 scale 0.40 }
  finish { diffuse 0.95 specular 0.03 roughness 0.20 }
};

#declare GroundStoneTex = texture {
  pigment {
    granite
    color_map {
      [0.00 color rgb <0.70, 0.68, 0.63>]
      [0.55 color rgb <0.62, 0.60, 0.56>]
      [1.00 color rgb <0.78, 0.76, 0.72>]
    }
    scale 0.85
  }
  normal { bumps 0.25 scale 0.25 }
  finish { diffuse 0.85 specular 0.08 roughness 0.08 }
};

// --- Ground / hill ---
plane {
  y, 0
  texture { GrassTex }
}

// A gentle hill mound under the castle
sphere {
  <0, -2.3, 0>, 10.8
  texture { GrassTex }
}

// Small stone apron near entrance
box {
  <-4.5, 0.001, -9.0>, <4.5, 0.06, -3.0>
  texture { GroundStoneTex }
}

// --- Reusable crenellation macro (fast + aligned) ---
#macro CrenelsX(X1, X2, Y1, Y2, Z1, Z2, Count, GapFrac)
  #local L = (X2 - X1);
  #local Step = L/Count;
  #local W = Step*(1.0 - GapFrac);
  #local i = 0;
  union {
    #while (i < Count)
      box {
        <X1 + i*Step, Y1, Z1>,
        <X1 + i*Step + W, Y2, Z2>
      }
      #local i = i + 1;
    #end
  }
#end

#macro CrenelsZ(Z1, Z2, Y1, Y2, X1, X2, Count, GapFrac)
  #local L = (Z2 - Z1);
  #local Step = L/Count;
  #local W = Step*(1.0 - GapFrac);
  #local i = 0;
  union {
    #while (i < Count)
      box {
        <X1, Y1, Z1 + i*Step>,
        <X2, Y2, Z1 + i*Step + W>
      }
      #local i = i + 1;
    #end
  }
#end

// --- Castle dimensions (kept consistent for precise fits) ---
#declare WallTh = 0.8;

#declare KeepX1 = -4.0;
#declare KeepX2 =  4.0;
#declare KeepZ1 = -2.0;
#declare KeepZ2 =  6.0;
#declare KeepH  =  9.0;

#declare TowerR = 2.0;
#declare TowerH = 10.0;

#declare CourtyardX1 = -10.0;
#declare CourtyardX2 =  10.0;
#declare CourtyardZ1 = -10.0;
#declare CourtyardZ2 =  12.0;
#declare WallH = 6.0;

// --- Castle union ---
union {

  // Main keep
  box {
    <KeepX1, 0, KeepZ1>, <KeepX2, KeepH, KeepZ2>
    texture { StoneTex }
  }

  // Keep roof (simple hip/pyramid style)
  cone {
    <0, KeepH, 2.0>, 5.8,
    <0, KeepH+3.1, 2.0>, 0.0
    texture { RoofTex }
  }

  // Keep crenellations (top edge)
  union {
    // Front/back
    object { CrenelsX(KeepX1, KeepX2, KeepH, KeepH+0.8, KeepZ1-0.001, KeepZ1+0.65, 10, 0.35) }
    object { CrenelsX(KeepX1, KeepX2, KeepH, KeepH+0.8, KeepZ2-0.65, KeepZ2+0.001, 10, 0.35) }
    // Left/right
    object { CrenelsZ(KeepZ1, KeepZ2, KeepH, KeepH+0.8, KeepX1-0.001, KeepX1+0.65, 10, 0.35) }
    object { CrenelsZ(KeepZ1, KeepZ2, KeepH, KeepH+0.8, KeepX2-0.65, KeepX2+0.001, 10, 0.35) }
    texture { StoneTex }
  }

  // Corner towers (cylinders) positioned at courtyard corners
  #declare TX1 = CourtyardX1;
  #declare TX2 = CourtyardX2;
  #declare TZ1 = CourtyardZ1;
  #declare TZ2 = CourtyardZ2;

  #declare TowerC1 = <TX1, 0, TZ1>;
  #declare TowerC2 = <TX2, 0, TZ1>;
  #declare TowerC3 = <TX1, 0, TZ2>;
  #declare TowerC4 = <TX2, 0, TZ2>;

  cylinder { TowerC1, TowerC1 + <0, TowerH, 0>, TowerR texture { StoneTex } }
  cylinder { TowerC2, TowerC2 + <0, TowerH, 0>, TowerR texture { StoneTex } }
  cylinder { TowerC3, TowerC3 + <0, TowerH, 0>, TowerR texture { StoneTex } }
  cylinder { TowerC4, TowerC4 + <0, TowerH, 0>, TowerR texture { StoneTex } }

  // Tower roofs (conical)
  cone { TowerC1 + <0, TowerH, 0>, TowerR+0.2, TowerC1 + <0, TowerH+3.0, 0>, 0 texture { RoofTex } }
  cone { TowerC2 + <0, TowerH, 0>, TowerR+0.2, TowerC2 + <0, TowerH+3.0, 0>, 0 texture { RoofTex } }
  cone { TowerC3 + <0, TowerH, 0>, TowerR+0.2, TowerC3 + <0, TowerH+3.0, 0>, 0 texture { RoofTex } }
  cone { TowerC4 + <0, TowerH, 0>, TowerR+0.2, TowerC4 + <0, TowerH+3.0, 0>, 0 texture { RoofTex } }

  // Curtain walls (fit precisely between tower tangency points)
  // North wall (between C1 and C2) at Z=TZ1, runs X from TX1+R to TX2-R
  box {
    <TX1+TowerR, 0, TZ1-WallTh/2>, <TX2-TowerR, WallH, TZ1+WallTh/2>
    texture { StoneTex }
  }
  // South wall at Z=TZ2
  box {
    <TX1+TowerR, 0, TZ2-WallTh/2>, <TX2-TowerR, WallH, TZ2+WallTh/2>
    texture { StoneTex }
  }
  // West wall at X=TX1
  box {
    <TX1-WallTh/2, 0, TZ1+TowerR>, <TX1+WallTh/2, WallH, TZ2-TowerR>
    texture { StoneTex }
  }
  // East wall at X=TX2
  box {
    <TX2-WallTh/2, 0, TZ1+TowerR>, <TX2+WallTh/2, WallH, TZ2-TowerR>
    texture { StoneTex }
  }

  // Wall crenellations (simple blocks along top of each wall)
  union {
    // North
    object { CrenelsX(TX1+TowerR, TX2-TowerR, WallH, WallH+0.7, TZ1-0.001, TZ1+0.60, 16, 0.40) }
    // South
    object { CrenelsX(TX1+TowerR, TX2-TowerR, WallH, WallH+0.7, TZ2-0.60, TZ2+0.001, 16, 0.40) }
    // West
    object { CrenelsZ(TZ1+TowerR, TZ2-TowerR, WallH, WallH+0.7, TX1-0.001, TX1+0.60, 16, 0.40) }
    // East
    object { CrenelsZ(TZ1+TowerR, TZ2-TowerR, WallH, WallH+0.7, TX2-0.60, TX2+0.001, 16, 0.40) }
    texture { StoneTex }
  }

  // Gatehouse opening on north wall (toward camera; camera is at negative Z)
  // Build a small gatehouse block centered on Z=TZ1, protruding outward (negative Z)
  #declare GateW = 5.0;
  #declare GateD = 2.5;
  #declare GateH = 7.0;

  difference {
    // Gatehouse mass
    box {
      <-GateW/2, 0, TZ1-GateD>, <GateW/2, GateH, TZ1+WallTh/2>
    }
    // Arch cut
    union {
      box { <-1.4, 0, TZ1-GateD-0.01>, <1.4, 3.4, TZ1+WallTh/2+0.02> }
      cylinder {
        <0, 3.4, TZ1-GateD-0.01>, <0, 3.4, TZ1+WallTh/2+0.02>, 1.4
        rotate <0,0,90>
      }
    }
    texture { StoneTex }
  }

  // Wooden gate door (simple)
  box {
    <-1.28, 0.0, TZ1-GateD+0.12>, <1.28, 3.25, TZ1-GateD+0.24>
    texture { DarkWoodTex }
  }

  // Small flag on keep roof
  union {
    cylinder { <0, KeepH+0.6, 2.0>, <0, KeepH+4.6, 2.0>, 0.06 texture { DarkWoodTex } }
    triangle { <0, KeepH+4.2, 2.0>, <1.3, KeepH+3.9, 2.0>, <0, KeepH+3.6, 2.0>
      texture { pigment { color rgb <0.80, 0.15, 0.16> } finish { diffuse 0.9 specular 0.05 } }
    }
  }

  // Slight lift so it sits on hill nicely
  translate <0, 0.2, 0>
}

// --- Simple courtyard ground inside walls (stone/gravel feel) ---
box {
  <CourtyardX1+TowerR, 0.002, CourtyardZ1+TowerR>,
  <CourtyardX2-TowerR, 0.045, CourtyardZ2-TowerR>
  texture { GroundStoneTex }
}