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// Copyright 2003 by Tor Olav Kristensen
// Email: t o r _ o l a v _ k [ a t ] h o t m a i l [ d o t ] c o m
// http://home.no/t-o-k
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// File: MountainIso_FunctionHeightField.pov

#version 3.5;

#include "MountainIso.inc"

default {
  finish {
    ambient color rgb <0, 0, 0>
    diffuse 1
  }
}

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#declare MinX = pMin.x;
#declare MinY = pMin.x;
#declare MinZ = pMin.z;

#declare vSize = pMax - pMin;

#declare SizeX = vSize.x;
#declare SizeY = vSize.y;
#declare SizeZ = vSize.z;

#declare Ratio = SizeX/SizeZ;

#declare WidthRes = 1000; // Increase for better resolution
#declare HeightRes = WidthRes/Ratio;

#declare NormalizedFn =
  function { (Fn(SizeX*x + MinX, SizeZ*z + MinZ) - MinY)/SizeY }

height_field {
  function WidthRes, HeightRes { NormalizedFn(x, 0, 1 - y) } // 1-y ??
//  smooth
  scale vSize
  translate pMin
  pigment { color rgb <1, 1, 1> }
//  no_shadow
//  double_illuminate
}

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light_source {
  <2, 4, 3>*30
  color rgb <0.87, 0.80, 0.60>
}

light_source {
  < -1,  4, -2>*40
  color rgb <0.27, 0.27, 0.40>
  shadowless
}

camera {
  location <10.0, 10.0, -12.5>
  look_at <0.0, 1.2, 0.0>
  angle 60
}

background { color rgb <0.3, 0.8, 1.0> }

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