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- // Persistence of Vision Ray Tracer POV-Ray 3.1 Sample Scene
- // by Chris Young
- // MACRO1.POV demonstrates basic use of a macro. Defines
- // a macro called Make_Many which takes an object and
- // makes many copies of it rotated about a particular axis.
-
- #include "colors.inc"
-
- light_source { <1000,1000,-1000>, White}
-
- camera { location <3,3,-10> direction 2*z look_at <0,0,0>}
-
- union {
- plane{y,-2} plane{-z,-10} plane{x,-10}
- pigment{checker Cyan,Yellow}
- }
-
- // Define the macro. Parameters are:
- // Stuff: The stuff to be multiplied and rotated
- // How_Many: Number of copies to make
- // Axis: The axis about which we'll rotate the copies.
- #macro Make_Many (Stuff,How_Many,Axis)
- #local Count=0; // this identifier is local and
- // temporary to this macro
- #while (Count<How_Many)
- object{Stuff rotate Axis*Count*(360/How_Many)}
- #local Count=Count+1;
- #end
- #end
-
- #declare Thing = cylinder{0,x,0.1}
-
- union {
- Make_Many (Thing,4,z) // Make 4 things rotated about z
- pigment{Red}
- translate -2.25*x
- }
-
- union {
- Make_Many (Thing,6,z) // Make 6 things rotated about z
- pigment{Blue}
- }
-
- union {
- Make_Many (Thing,6,y) // Make 6 things rotated about y
- pigment{Green}
- translate 2.25*x
- }
-
-