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- // Persistence Of Vision raytracer version 3.0 sample file.
- // Distance based attenuation in translucent objects example
-
- #version 3.0
- global_settings { assumed_gamma 2.2 }
-
- #include "colors.inc"
-
- #declare IOR = 1.05
- #declare Distance = 20
-
- #declare Col1 = -15
- #declare Col2 = 35
- #declare Row1 = 25
- #declare Row2 = -5
-
- camera {
- orthographic
- location <0, 0, -100>
- right 80 * 4/3 * x
- up 80 * y
- look_at <0, 0, 0>
- }
-
- //
- // Use beloved famous raytrace green/yellow checkered wall
- //
-
- plane { z, 20
- pigment {
- checker colour Yellow colour Green
- scale 4
- }
- finish {
- ambient 0.2
- diffuse 0.8
- }
- }
-
- //
- // Translucent sphere without attenuation
- //
-
- sphere { <Col1, Row1, 0>, 10
- pigment { rgbt<1, 1, 1, 0.9> }
- finish {
- ambient 0
- diffuse 0
- refraction 1
- ior IOR
- phong 1
- phong_size 200
- fade_distance Distance
- fade_power 0
- }
- }
-
- //
- // Translucent sphere with linear attenuation
- //
-
- sphere { <Col2, Row1, 0>, 10
- pigment { rgbt<1, 1, 1, 0.9> }
- finish {
- ambient 0
- diffuse 0
- refraction 1
- ior IOR
- phong 1
- phong_size 200
- fade_distance Distance
- fade_power 1
- }
- }
-
- //
- // Translucent sphere with quadratic attenuation
- //
-
- sphere { <Col1, Row2, 0>, 10
- pigment { rgbt<1, 1, 1, 0.9> }
- finish {
- ambient 0
- diffuse 0
- refraction 1
- ior IOR
- phong 1
- phong_size 200
- fade_distance Distance
- fade_power 2
- }
- }
-
- //
- // Translucent sphere with cubic attenuation
- //
-
- sphere { <Col2, Row2, 0>, 10
- pigment { rgbt<1, 1, 1, 0.9> }
- finish {
- ambient 0
- diffuse 0
- refraction 1
- ior IOR
- phong 1
- phong_size 200
- fade_distance Distance
- fade_power 3
- }
- }
-
- //
- // Due to the atmospheric attenuation and the large distance to
- // the light source it has to be very bright.
- //
-
- light_source { <10000, 10000, -10000> colour White }
-
-