| TUD Organische Chemie | | Immel | | Graphics | | Povray 3.5 | | local | | | View or Print (this frame only) |
Example file (local.pov):
// Persistence Of Vision Ray Tracer POV-Ray 3.5 sample Scene
// by Chris Young
// LOCAL.POV demonstrates basic use of a temporary local identifier
// using the #local directive. Also demonstrates new #undef directive.
// See debug messages after rendering.
#include "colors.inc"
light_source { <100,1000,-1000>, White}
background{rgb 0.4}
camera { location -9*z direction 2*z look_at <0,0,0>}
#declare Thing = sphere{0,1 pigment{Red}}
/* Thing on the left is global */
object{Thing translate -2.5*x}
// This include file declares a local version of "Thing"
// and leaves it at the origin.
#include "local.inc"
/* Now put "Thing" on the right. You get the original version.*/
object{Thing translate 2.5*x}
// The file "local.inc" also declares a local
// identifier called "Local_Item" which disapears on exit.
#ifdef (Local_Item)
#debug "Local_Item found\n"
#else
#debug "Local_Item not found\n"
#end
// Now let's get rid of the global Thing
#debug "Doing #undef Thing\n"
#undef Thing
#ifdef (Thing)
#debug "Thing found\n"
#else
#debug "Thing not found\n"
#end