POV-Ray : Newsgroups : povray.advanced-users : Very odd effect in an animation... : Re: Very odd effect in an animation... Server Time
28 Jul 2024 14:32:26 EDT (-0400)
  Re: Very odd effect in an animation...  
From: Carl
Date: 30 Jan 2005 20:55:00
Message: <web.41fd8e9edbc88d1529d4ff530@news.povray.org>
"Slime" <fak### [at] emailaddress> wrote:
> By any chance, are you passing variables "by reference" into macros? (So
> that the macros change their values?)

Yes, I'm passing variables to macross to be set by those macros.  I declare
them outside the macro to be zero before the macro is called.  At the
beginning of my code I have:

#declare Bike1x = 0;
#declare Bike1z = 0;
#declare Bike1Forward = <1,0,0>;
#declare Bike1Color = Red;

#declare Bike2x = 0;
#declare Bike2z = 0;
#declare Bike2Forward = <1,0,0>;
#declare Bike2Color = Orange;

#declare Bike3x = 0;
#declare Bike3z = 0;
#declare Bike3Forward = <1,0,0>;
#declare Bike3Color = Blue;

#declare Bike4x = 0;
#declare Bike4z = 0;
#declare Bike4Forward = <1,0,0>;
#declare Bike4Color = Orange;

  I then have my macros followed by:

JetWall (path1,bike_height,wall_width,Bike1Color,Bike1x,Bike1z,Bike1Forward)
JetWall (path2,bike_height,wall_width,Bike2Color,Bike2x,Bike2z,Bike2Forward)
JetWall (path3,bike_height,wall_width,Bike3Color,Bike3x,Bike3z,Bike3Forward)
JetWall (path4,bike_height,wall_width,Bike4Color,Bike4x,Bike4z,Bike4Forward)
#declare Spokes = (frame_number/2=int(frame_number/2));
LightCycle(Bike1x,Bike1z,Bike1Forward,Bike1Color,Spokes,135,155)
LightCycle(Bike2x,Bike2z,Bike2Forward,Bike2Color,Spokes,155,185)
LightCycle(Bike3x,Bike3z,Bike3Forward,Bike3Color,Spokes,165,125)
LightCycle(Bike4x,Bike4z,Bike4Forward,Bike4Color,Spokes,35,195)

JetWall is a macro that draws the wall following the bike and calculates the
location (Bike#x and Bike#z) and forward direction (Bike#Foward)  Those
values are then passed to the macro LightCycle that draws the Bike itself.
I'm not 100% sure what you mean by "by reference".

Thanks,
Carl


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