TUD Organische ChemieImmelGraphicsPovray 3.5macro2View or Print this frame onlyView or Print (this frame only)

Example Graphics

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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}

#declare Thing = cone{0,1/2,y,0}

object{Thing // Display the original Thing
translate -2.25*x

Turn_Me(Thing,-90,x) // Turn -90 about x

object{Thing // Thing was changed by Turn_Me

Turn_Me(Thing,-90,y) // Turn -90 about y

object{Thing // Thing was changed again
translate 2.25*x

© Copyright PD Dr. S. Immel