#version 3.7;

global_settings {
  assumed_gamma 1.0
  max_trace_level 8
}

background { color rgb <0.05, 0.06, 0.075> }

// ---------------- Camera ----------------
camera {
  location <0.0, 2.55, -6.9>
  look_at  <0.0, 1.25, 0.0>
  angle 33
}

// ---------------- Lights ----------------
light_source { <-8.0, 10.5, -10.0> color rgb <1.0, 0.98, 0.92>*1.15 }
light_source { < 7.0,  5.2, -3.0>  color rgb <0.45, 0.52, 0.70>*0.55 }
light_source { < 0.0,  9.0,  7.5>  color rgb <0.30, 0.28, 0.26>*0.50 }
light_source { <-2.0,  2.6,  5.5>  color rgb <0.40, 0.45, 0.55>*0.30 }

// Soft frontal boost for metal read (dim)
light_source { <0.0, 3.0, -4.0> color rgb <1,1,1>*0.15 }

// ---------------- Materials ----------------

// Stained / tarnished metal (procedural; fixed pigment_map syntax)
#declare StainedMetalTex =
texture {
  pigment {
    average
    pigment_map {
      [0.62 granite
        color_map {
          [0.00 rgb <0.18, 0.19, 0.21>]
          [0.55 rgb <0.30, 0.31, 0.33>]
          [1.00 rgb <0.44, 0.45, 0.47>]
        }
        scale 0.55
      ]
      [0.25 bozo
        color_map {
          [0.00 rgb <0.15, 0.11, 0.08>]
          [0.55 rgb <0.25, 0.19, 0.13>]
          [1.00 rgb <0.07, 0.065, 0.06>]
        }
        turbulence 0.65
        scale 0.33
        translate <3.1, 1.7, -2.4>
      ]
      [0.13 wrinkles
        color_map {
          [0.00 rgb <0.06, 0.09, 0.08>]
          [0.55 rgb <0.12, 0.20, 0.17>]
          [1.00 rgb <0.05, 0.07, 0.06>]
        }
        scale 0.22
        translate <-1.2, 2.6, 0.8>
      ]
    }
  }
  normal {
    average
    normal_map {
      [0.60 bumps 0.40 scale 0.030]
      [0.25 wrinkles 0.25 scale 0.11]
      [0.15 ripples 0.10 scale 0.18]
    }
  }
  finish {
    diffuse 0.70
    ambient 0
    specular 0.75
    roughness 0.020
    reflection 0.22
    metallic
    conserve_energy
  }
}

#declare StoneBaseTex =
texture {
  pigment {
    granite
    color_map {
      [0.00 rgb <0.065, 0.07, 0.085>]
      [0.55 rgb <0.12, 0.125, 0.145>]
      [1.00 rgb <0.045, 0.05, 0.065>]
    }
    scale 1.7
  }
  normal { bumps 0.20 scale 0.22 }
  finish {
    diffuse 0.92
    ambient 0
    specular 0.10
    roughness 0.10
    reflection 0.04
    conserve_energy
  }
}

// ---------------- Environment ----------------

// Floor
plane { y, 0 texture { StoneBaseTex } }

// Subtle backdrop (fast)
plane {
  z, 6.0
  texture {
    pigment {
      gradient y
      color_map {
        [0.00 rgb <0.07, 0.075, 0.09>]
        [1.00 rgb <0.03, 0.035, 0.05>]
      }
      scale 6
      translate <0,-1,0>
    }
    finish { diffuse 0.9 ambient 0 }
  }
  hollow
}

// ---------------- Geometry: Crusader's Cross ----------------

// Dimensions (Crusader cross style: equal arms, flared ends)
#declare ArmLen   = 1.18;
#declare ArmWid   = 0.70;
#declare Thick    = 0.36;
#declare EndFlare = 0.56;
#declare EndHalf  = 0.54;

// Bevel amount (kept modest for speed/robustness)
#declare Bevel = 0.08;

// A 2D silhouette centered at origin; we will extrude by scaling in Z
#declare Cross2D =
union {
  // Center block
  box { <-ArmWid/2, -ArmWid/2, -0.001>, < ArmWid/2,  ArmWid/2, 0.001> }

  // Up arm + flared cap
  box { <-ArmWid/2,  ArmWid/2, -0.001>, < ArmWid/2,  ArmWid/2 + ArmLen, 0.001> }
  box { <-EndHalf, ArmWid/2 + ArmLen - EndFlare, -0.001>, < EndHalf, ArmWid/2 + ArmLen, 0.001> }

  // Down arm + flared cap
  box { <-ArmWid/2, -ArmWid/2 - ArmLen, -0.001>, < ArmWid/2, -ArmWid/2, 0.001> }
  box { <-EndHalf, -ArmWid/2 - ArmLen, -0.001>, < EndHalf, -ArmWid/2 - ArmLen + EndFlare, 0.001> }

  // Right arm + flared cap
  box { < ArmWid/2, -ArmWid/2, -0.001>, < ArmWid/2 + ArmLen, ArmWid/2, 0.001> }
  box { < ArmWid/2 + ArmLen - EndFlare, -EndHalf, -0.001>, < ArmWid/2 + ArmLen, EndHalf, 0.001> }

  // Left arm + flared cap
  box { <-ArmWid/2 - ArmLen, -ArmWid/2, -0.001>, <-ArmWid/2, ArmWid/2, 0.001> }
  box { <-ArmWid/2 - ArmLen, -EndHalf, -0.001>, <-ArmWid/2 - ArmLen + EndFlare, EndHalf, 0.001> }
}

// Helper extents for bevel cutting volume
#declare OuterX = (ArmWid/2 + ArmLen);
#declare OuterY = (ArmWid/2 + ArmLen);

// Main cross: difference of outer and slightly inset cross to simulate bevel
#declare CrossBody =
union {
  difference {
    // Outer solid
    object { Cross2D scale <1,1,Thick> }

    // Inset cut to create a chamfer-like rim
    object {
      Cross2D
      scale <(1 - Bevel), (1 - Bevel), (Thick*0.88)>
      translate <0,0,0>
    }

    // Keep only the rim by trimming interior cut to avoid hollowing too much
    // (This box limits subtraction mostly to edges)
    box { <-OuterX*(1-Bevel)-0.02, -OuterY*(1-Bevel)-0.02, -Thick*0.50>,
          < OuterX*(1-Bevel)+0.02,  OuterY*(1-Bevel)+0.02,  Thick*0.50> inverse }
  }

  // Fill: add back a slightly smaller core for solidity (prevents looking like a frame)
  object {
    Cross2D
    scale <(1 - Bevel*0.65), (1 - Bevel*0.65), (Thick*0.92)>
  }

  // Central boss/rivet (stained metal too)
  cylinder { <0,0,-Thick*0.52>, <0,0, Thick*0.52>, 0.165 }
  sphere   { <0,0, Thick*0.52>, 0.165 }
  sphere   { <0,0,-Thick*0.52>, 0.165 }

  texture { StainedMetalTex }
}

// Place cross
#declare CrossY = 1.22;

object {
  CrossBody
  rotate <0, 18, 0>
  translate <0, CrossY, 0>
}

// Subtle contact shadow helper (dark translucent disc)
disc {
  <0, 0.001, 0>, y, 1.65
  texture {
    pigment { color rgbt <0,0,0,0.78> }
    finish { ambient 0 diffuse 0 }
  }
  rotate <0, 18, 0>
}