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// This work is licensed under the Creative Commons Attribution 3.0 Unported License.
// To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/
// or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View,
// California, 94041, USA.
// Persistence Of Vision raytracer sample file.
// Demo using the spiral1 texture ... by Dieter Bayer, May 1994
//
// 9 discs with different spiral1 textures.
//
// The scaling factor of the texture, i.e. the number of turns
// one "arm" of the spiral makes, decreases from left to right.
//
// The number of "arms" of the spiral,
// increases from top to bottom.
//
// -w320 -h240
// -w800 -h600 +a0.3
//
#version 3.7;
global_settings {assumed_gamma 1.0}
#include "colors.inc"
#include "shapes.inc"
/* factors used for positioning the discs */
#declare X = 2.1;
#declare Y = 2.0;
/* arms used */
#declare O1 = 3;
#declare O2 = 6;
#declare O3 = 9;
/* scaling used */
#declare S1 = 100;
#declare S2 = 1;
#declare S3 = 0.2;
/* Spiral 1 */
#declare Spiral1 =
texture {
pigment {
spiral1 O1
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S1, S1, S1>
}
/* Spiral 2 */
#declare Spiral2 =
texture {
pigment {
spiral1 O1
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S2, S2, S2>
}
/* Spiral 3 */
#declare Spiral3 =
texture {
pigment {
spiral1 O1
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S3, S3, S3>
}
/* Spiral 4 */
#declare Spiral4 =
texture {
pigment {
spiral1 O2
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S1, S1, S1>
}
/* Spiral 5 */
#declare Spiral5 =
texture {
pigment {
spiral1 O2
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S2, S2, S2>
}
/* Spiral 6 */
#declare Spiral6 =
texture {
pigment {
spiral1 O2
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S3, S3, S3>
}
/* Spiral 7 */
#declare Spiral7 =
texture {
pigment {
spiral1 O3
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S1, S1, S1>
}
/* Spiral 8 */
#declare Spiral8 =
texture {
pigment {
spiral1 O3
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S2, S2, S2>
}
/* Spiral 9 */
#declare Spiral9 =
texture {
pigment {
spiral1 O3
color_map { [ 0.0 color rgb<1,1,1>]
[ 1.0 color rgb<0.0,0.1,0.3>]}
}
finish { ambient 1 }
scale <S3, S3, S3>
}
camera {
location <0, 0, -6.5>
right x*image_width/image_height
angle 65
look_at <0, 0, 0>
}
background { color rgb<1,1,1>*0.5 }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral1 } translate <-1.5*X, +1*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral2 } translate <-0.5*X, +1*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral3 } translate <+0.5*X, +1*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral4 } translate <-1*X, 0*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral5 } translate < 0*X, 0*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral6 } translate <+1*X, 0*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral7 } translate <-0.5*X, -1*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral8 } translate < 0.5*X, -1*Y, 0> }
disc { <0, 0, 0>, <0, 0, 1>, 1 hollow on texture { Spiral9 } translate <+1.5*X, -1*Y, 0> }
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