// height field test file    jpb 5/16/95  4:31 am
// source for "land4.tga":
// gforge -d 2.2 -ad 2.6 0.05 -pow 0.35 -pe .5 .5 -mesh 512

#include "colors.inc"
#include "shapes.inc"
#include "stones.inc"

camera {
	location        <.501, -.3, -2>
//        location        <.45, .45, -2>
	direction       <0, 0, 1.7>
	up              <0, 1, 0>
	right           <4/3, 0, 0>
	look_at         <.5, .42, -.5>
}

/* yellowish light */
object { light_source { <3, 2, -1>  color red .84 green .63 blue .42
  area_light <0.2, 0, 0> <0,0,-2.5> 2, 7
  adaptive 1
  jitter
  } 
}

/* reddish light */
object { light_source { <-3, -3, -.7> color red .7 green .28 blue .112
    area_light <.5, -.5, 0> <0, 0, -1> 2, 10
    adaptive 1
    jitter
   }
}

/* sky background fill light */
object { light_source { <-2, -2, -10>  color red .05 green .15 blue .15
  area_light <4, 0, 0> <0, 4, 0> 3, 3
  adaptive 1
  jitter
  } 
}

// heightfield in center of field of view

object {
	 height_field {tga "output.tga" }
	 scale < 1, 0.5, 1 >              // reduce height (was ys=0.20)
	 rotate < -90, 0, 0 >              // flip up from xz plane to xy plane
	 translate < 0, 0, 0 >
	 texture { pigment { color White }
		   normal { bumps 1 scale .0004 }  // very fine roughness
		   finish {
			   diffuse 1
			   ambient 0.02
			   // specular .1
			   // crand 0.15
			  }
		 }
       } 

// heightfield on the right

object {
	 height_field {tga "output.tga" }
	 scale < 1, 0.5, 1 >              // reduce height (was ys=0.20)
	 rotate < -90, 0, 0 >              // flip up from xz plane to xy plane
	 translate < 0.990, 0, 0 >
	 texture { pigment { color White }
		   normal { bumps 1 scale .0004 }
		   finish {
			   diffuse 1
			   ambient 0.02
			   // specular .1
			   // crand 0.15
			  }
		 }
       }


// heightfield to the left

object {
	 height_field {tga "output.tga" }
	 scale < 1, 0.5, 1 >              // reduce height (was ys=0.20)
	 rotate < -90, 0, 0 >              // flip up from xz plane to xy plane
	 translate < -0.990, 0, 0 >
	 texture { pigment { color White }
		   normal { bumps 1 scale .0004 }
		   finish {
			   diffuse 1
			   ambient 0.02
			   // specular .1
			   // crand 0.15
			  }
		 }
       }