| TUD Organische Chemie | | Immel | | Graphics | | Povray 3.5 | | macro2 | | | View or Print (this frame only) |
Example file (macro2.pov):
// Persistence Of Vision Ray Tracer POV-Ray 3.5 sample Scene
// by Chris Young
// MACRO2.POV demonstrates basic use of a macro to modify an
// identifier parameter, not just do something based upon the
// parameter. Defines a macro called Turn_Me which takes
// an object identifier and re-declares it turned a specified
// amount about a particular axis. The result is passed back
// through the parameter.
#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 rotated. This identifier is
// actually re-declared and the new object is passed
// back to the calling module.
// Degrees: Number of degrees to rotate
// Axis: The axis about which we'll rotate
#macro Turn_Me(Stuff,Degrees,Axis)
#declare Stuff=object{Stuff rotate Axis*Degrees}
#end
#declare Thing = cone{0,1/2,y,0}
object{Thing // Display the original Thing
pigment{rgb<1,0,0>}
translate -2.25*x
}
Turn_Me(Thing,-90,x) // Turn -90 about x
object{Thing // Thing was changed by Turn_Me
pigment{rgb<0,1,1>}
}
Turn_Me(Thing,-90,y) // Turn -90 about y
object{Thing // Thing was changed again
pigment{rgb<1,1,0>}
translate 2.25*x
}