#version 3.5;

#include "colors.inc"
#include "functions.inc"
#include "transforms.inc"

global_settings
{
	assumed_gamma 1
}

background
{
	color White
}
#declare CamLoc = < 0, 0,-10>;

#declare	box_offset = 0.0*<1,1,1>;
#declare	SIZE = <95,0,250>;
#declare	box_p1 = -<95,10,250>+box_offset;
#declare	box_p2 = <95,45,250>-box_offset;
#declare	LEVEL = 180;
#declare	MAX_GRADIENT = 400;
#declare	ACCURACY = 0.0001;

camera
{
	location CamLoc
	look_at < 0, 0, 1>
	angle 45
	up	image_height
	right	image_width
}

light_source 
{
	<0, 0,0> 
	color White
}

#declare IsoFinish =
finish
{
	ambient 0 diffuse 1
	specular .5 roughness 0.02
	brilliance 2
}

union
{
	union
	{
		isosurface 
		{
			function { -f_eval_spline_6dir_FCC(x,y,z,0)}
			threshold -LEVEL
			max_gradient	MAX_GRADIENT
			accuracy ACCURACY
			contained_by {box {box_p1 box_p2}}
			open
			texture 
			{
				pigment 
				{
					color Gold
				}
				finish {IsoFinish}
			}
		}
		rotate <0,90,180>
	}
	rotate <90,0,0>
	translate <0,0,600>
}