MR surface approximation

link "contour.so"
link "base.so"
$include <contour.mi>
$include <base.mi>

options "opt"
	samples		-1 2
	contrast	0.1 0.1 0.1
	jitter		0
	contour store		"contour_store_function" ()
	contour contrast	"contour_contrast_function_levels" (
							"zdelta"		100.0,
							"ndelta"		180.0,
							"diff_index"	on,
							"max_level"	1
						)
	object space
end options

camera "cam"
	frame		1
	output		"rgb" "out.rgb"
	output		"contour,rgba" "contour_only" (
					"background" 1.0 1.0 1.0 1.0,
					"glow"		 off,
					"maxcomp"	 off
				)
	focal		3
	aperture	1
	aspect		1
	resolution	1024 1024
end camera

instance "cam_inst" "cam"
	transform	1 0 0 0
				0 1 0 0
				0 0 1 0
				0 0 -14.5 1
end instance

light "light1"
	"mib_light_point" (
		"color"		1 1 1
	)
	origin		50 150 400
end light

instance "light1_inst" "light1" end instance

color texture "pic1" "textures/tex_wave.rgb"

declare phenomenon
	color "displace_sh" (
		color texture	"texture"
	)
	shader "coord" "mib_texture_vector" (
		"select"		0,
		"selspace"		1
	)
	shader "remap" "mib_texture_remap" (
		"input"		= "coord",
		"repeat"	3 3
	)
	shader "tex" "mib_texture_lookup" (
		"tex"		= interface "texture",
		"coord"		= "remap"
	)
	root = "tex"
end declare

material "mtl"
	opaque
	"mib_illum_phong" (
		"ambient"	0.3 0.3 0.3,
		"diffuse"	0.7 0.7 0.7,
		"ambience"	0.3 0.3 0.3,
		"specular"	0.2 0.2 0.2,
		"exponent"	50,
		"mode"		1,
		"lights"	["light1_inst"]
	)
	contour "contour_shader_simple" (
		"color"		0.0 0.0 0.0 1.0,
		"width"		0.05
	)
	displace "displace_sh" (
		"texture"	"pic1"
	)
end material

object "plane"
	visible trace shadow tag 1
	max displace 1.0
	basis "bez" bezier 3
	basis "lin" bezier 1
	group
		-2	-2	2		-1	-2	2		1	-2	2		2	-2	2
		-2	0	-4		-1	0	-4		1	0	-4		2	0	-4
		-2	2	-10		-1	2	-10		1	2	-10		2	2	-10
		-2	4	-16		-1	4	-16		1	4	-16		2	4	-16

		0	0.99	0		0	0	0		0.99	0.99	0		0.99	0	0

		v 0 v 1 v 2 v 3 v 4 v 5 v 6 v 7 v 8 v 9 v 10
		v 11 v 12 v 13 v 14 v 15 v 16 v 17 v 18 v 19

		surface "surf" "mtl"
			"bez"	0 1		0. 1.
			"bez"	0 1		0. 1.
			0 1 2 3  4 5 6 7  8 9 10 11  12 13 14 15

		texture "lin"			0. 1.
				"lin"			0. 1.
				16 17 18 19

		#approximate surface parametric 10 10 "surf"
		#approximate displace parametric 1 1 "surf"

		#approximate surface parametric 4 4 "surf"
		#approximate displace length 0.412 1 5 "surf"

		#approximate surface parametric 4 4 "surf"
		#approximate displace view length 22.5 1 5 "surf"

		#approximate surface parametric 4 4 "surf"
		#approximate displace distance 0.119 1 5 "surf"

		#approximate surface parametric 4 4 "surf"
		#approximate displace view distance 6.86 1 5 "surf"

		approximate surface parametric 4 4 "surf"
		approximate displace angle 38.4 1 5 "surf"

	end group
end object

instance "plane_inst" "plane" end instance

instgroup "rootgrp"
	"cam_inst" "light1_inst" "plane_inst"
end instgroup

render "rootgrp" "cam_inst" "opt"