more fun!

chain.pov

@@ -0,0 +1,68 @@
+  #version 3.7;
+  #include "colors.inc"
+
+  global_settings {
+    assumed_gamma 1
+  }
+
+  camera {
+    right x*1280/720
+    location <-25, -75.1, -60>
+    look_at 0.1
+    angle 30
+  }
+
+  background { color Gray30 }
+
+  light_source { <300, 300, -1000> White }
+
+  #declare half_torus = difference {
+    torus {
+      4,1
+      sturm
+      rotate x*-90  // so we can see it from the top
+    }
+    box { <-5, -5, -1>, <5, 0, 1> }
+  }
+  #declare chain_segment = cylinder { <0,4,0>, <0,-4,0>, 1  }
+
+  #declare flip_it = x*180;
+  #declare torus_trans = 8;
+  #declare link_trans = torus_trans*2-2*y;
+
+  #declare chain_texture = texture {
+    pigment { color rgb <.49, .56, .59> }
+    finish {
+      ambient .1
+      diffuse .4
+      reflection .35
+      specular 1
+      metallic
+    }
+  }
+
+  #declare chain_link = union {
+    object  { half_torus                     translate  y*torus_trans/2 }
+    object  { half_torus     rotate flip_it  translate -y*torus_trans/2 }
+    object  { chain_segment                  translate  x*torus_trans/2 }
+    object  { chain_segment                  translate -x*torus_trans/2 }
+    translate y*60
+  }
+
+  #declare chain = union {    // needs loop with random range
+    object { chain_link }                                         // 0
+    object { chain_link translate -y*link_trans   rotate y*78  }  // 90
+    object { chain_link translate -y*link_trans*2 rotate y*8   }  // 0
+    object { chain_link translate -y*link_trans*3 rotate y*112 }  // 90
+    object { chain_link translate -y*link_trans*4 rotate y*-10 }  // 0
+    object { chain_link translate -y*link_trans*5 rotate y*90  }  // 90
+    object { chain_link translate -y*link_trans*6 rotate y*18  }  // 0
+    object { chain_link translate -y*link_trans*7 rotate y*72  }  // 90
+    texture { chain_texture }
+  }
+
+//======= RENDER
+  object { chain scale .45 }
+//  object { chain scale .45 translate < 10, 0, -20 > rotate y*20 }
+//  object { chain scale .45 translate < -10, 0, 20 > rotate y*35 }
+

demo.pov

@@ -1,20 +1,53 @@
+// Just following along the tutorial (mostly)
+
 #include "colors.inc"
 #include "stones.inc"
 
-background { rgb < 0.4, 0.28, 0.42 > }
+background { rgb < 0.5, 0.5, 0.5 > }
 
 camera {
-    location <0, 2, -3>
+  location <0, 2, -4>
   look_at  <0, 1,  2>
-  }
+}
 
-sphere {
+light_source { <2, 4, -3> color White }
+
+
+   sphere {
      <0, 1, 2>, 2
      texture {
-      /*pigment { color Yellow }*/
        pigment { color rgb < 0.16, 0.79, 0.04 > }
      }
    }
  
-light_source { <2, 4, -3> color White }
+// box {
+//   <-1, 0,   -1>,  // Near lower left corner
+//   < 1, 0.5,  3>   // Far upper right corner
+//   texture {
+//     T_Stone25     // Pre-defined from stones.inc
+//     scale 2       // Scale by the same amount in all
+//                   // directions
+//   }
+//   rotate y*20     // Equivalent to "rotate <0,20,0>"
+// }
   
+// cone {
+//   <0, 1, 0>, 0.03    // Center and radius of one end
+//   <1, 2, 3>, 1.0    // Center and radius of other end
+//   texture { T_Stone25 scale 1 }
+// }
+  
+// cylinder {
+//   <0, 1, 0>,     // Center of one end
+//   <1, 2, 3>,     // Center of other end
+//   0.5            // Radius
+//   open           // Remove end caps
+//   texture { T_Stone25 scale 1 }
+// }
+
+
+  plane { y, -1
+    pigment {
+      checker color rgb < .13, .16, .13 > , color rgb < .42, .42, .42 >
+    }
+  }  

povray.ini

@@ -0,0 +1,73 @@
+;                     PERSISTENCE OF VISION RAY TRACER
+;
+;                           POV-Ray VERSION 3.7
+;
+;                         SAMPLE POVRAY.INI FILE
+;
+;  The general form of the options is "Variable=value".  Everything 
+;  between the equals sign and the end of the line is considered part 
+;  of the value.  The spacing and layout is free-form but only one option 
+;  per line is allowed.  Variables and values are not case-sensitive.  
+;
+;  Note: characters after a semi-colon are treated as a comment
+;
+;  Traditional POV-Ray switches beginning with + or - are also allowed
+;  and they may be given with more than one switch per line.  
+;
+;  Add your own options at the bottom and/or edit these to suit. See the
+;  general documentation for full instructions on how to use INI options.
+;
+; Width of image in pixels.  Accepts integer values.
+Width = 1280
+;
+; Height of image in pixels.  Accepts integer values.
+Height = 720
+;
+; Sets minimum number of objects before auto bounding kicks in.
+Bounding_Threshold = 3
+;
+;
+; Turn display on
+Display=On
+;
+; Turn verbose mode on
+Verbose=On
+;
+;
+; Specify path to search for any files not found in current directory.
+; For example: Library_Path="C:\Program Files\POV-Ray for Windows\include"
+; There may be some entries already here; if there are they were
+; probably added by the install process or whoever set up the
+; software for you. At the least you can expect an entry that
+; points to the standard POV-Ray include files directory; on
+; some operating systems there may also be one which points to
+; the system's fonts directory.
+;
+; Note that some platforms (e.g. Windows, unless this feature is
+; turned off via the configuration file) will automatically append
+; standard locations like those mentioned above to the library
+; path list after reading this file, so in those cases you don't
+; necessarily have to have anything at all here.
+;
+
+;; Search path for #include source files or command line ini files not
+;; found in the current directory.  New directories are added to the
+;; search path, up to a maximum of 25.
+
+Library_Path="/usr/local/Cellar/povray/3.7.0.0/share/povray-3.7"
+Library_Path="/usr/local/Cellar/povray/3.7.0.0/share/povray-3.7/ini"
+Library_Path="/usr/local/Cellar/povray/3.7.0.0/share/povray-3.7/include"
+
+;; File output type control.
+;;     T    Uncompressed Targa-24
+;;     C    Compressed Targa-24
+;;     P    UNIX PPM
+;;     N    PNG (8-bits per colour RGB)
+;;     Nc   PNG ('c' bit per colour RGB where 5 <= c <= 16)
+
+Output_to_File=true
+Output_File_Type=N16            ;; (+/-Ftype)
+
++A
+
+

tordemo.pov

@@ -0,0 +1,64 @@
+#include "colors.inc"
+
+  camera {
+    location <0, .1, -75>
+    look_at 0.1
+    angle 30
+  }
+
+  background { color Gray50 } // to make the torus easy to see
+
+  light_source { <300, 300, -1000> White }
+
+  #declare full_tor = torus {
+     4, 1              // major and minor radius
+     rotate -90*x      // so we can see it from the top
+     pigment { Green }
+   }
+
+  #declare half_tor = difference {
+    torus {
+      4, 1
+      rotate x*-90  // so we can see it from the top
+    }
+    box { <-5, -5, -1>, <5, 0, 1> }
+    pigment { Green }
+  }
+  #declare tor_trans = 8;  // twice the major radius
+
+  #declare flip_it = 180*x;
+
+  #declare snake = union {
+    object { half_tor }
+    object { half_tor
+      rotate flip_it
+      translate x*tor_trans
+    }
+    object { half_tor
+      translate x*tor_trans*2
+    }
+    object { half_tor
+      rotate flip_it
+      translate x*tor_trans*3
+    }
+    object { half_tor
+      rotate flip_it
+      translate -x*tor_trans
+    }
+    object { half_tor
+      translate -x*tor_trans*2
+    }
+    object { half_tor
+      rotate flip_it
+      translate -x*tor_trans*3
+    }
+    object { half_tor
+      translate -x*tor_trans*4
+    }
+    rotate y*45
+    translate z*20
+  }
+
+
+  object { snake }
+