# mental ray scene file from "Writing mental ray shaders"
# http://www.writingshaders.com/scene_catalog.html

verbose on

link "vertex_color.so"
$include "vertex_color.mi"

options "opt"
    object space
    contrast .1 .1 .1 1
    samples 0 2
end options
 

camera "camera"
    output     "rgba" "tif" "texture_7.tif"
    focal      35
    aperture   22.05
    aspect     1.375546
    resolution 200 150
end camera

instance "main-camera" "camera"
    transform
        1  0  0  0
        0  1  0  0
        0  0  1  0
        0  0 -3  1
end instance

material "vcolor"
    "vertex_color" ( "uv_index" 0 )
end material

object "square"
    visible
    group
	# Coordinate data for XYZ position:
        -.5 -.5  0
         .5 -.5  0
         .5  .5  0
        -.5  .5  0
	# First set of texture coordinates
	# (see "Textures, Motion, Derivatives" in
	# documentation of miState):
	0 0 0
	1 0 0
	1 1 0
	0 1 0
	# Second set of texture coordinates:
	1 0 0
	0 1 0
 	0 0 1
	1 1 1
	# Following integers are indices into previous list of triplets:
	# "v" is vertex coordinate
	# "t" is tex_list array element, starting at 0
        v 0 t 4 t 8
	v 1 t 5 t 9
	v 2 t 6 t 10
	v 3 t 7 t 11
	# Define polygon; now integers refer to "v" definitions:
        p 0 1 2 3
    end group
end object

instance "colored-square" "square"
    material "vcolor"
end instance

instgroup "root"
    "main-camera" "colored-square"
end instgroup

render "root" "main-camera" "opt"

# Incremental render: change output file from
# "texture_7.tif" to "texture_7_uv_1.tif"; 
# change "vertex_color" parameter "uv_index" from 0 to 1.


incremental camera "camera"
    output     "rgba" "tif" "texture_7_uv_1.tif"
    focal      35
    aperture   22.05
    aspect     1.375546
    resolution 200 150
end camera

incremental material "vcolor"
    "vertex_color" ( "uv_index" 1 )
end material

render "root" "main-camera" "opt"

# For diagram:

material "texture_space_0"
    "vertex_color" (
        "uv_index" 0
    )
end material

material "texture_space_1"
    "vertex_color" (
        "uv_index" 1
    )
end material