"B. Gimeno" <nos### [at] yacom> wrote in message 
news:4217a9ae$1@news.povray.org...
> take in count that pov rotates objects en degrees, but count sin and cos
> functions in radians, then
> instead
> object {XX rotate x*cos(30),
> use a conversion inside de cos function
> object {XX rotate x*cos(radians(30))}
> --
> B Gimeno

Yes, the following rotates the wood beam in a complete circle:

camera {location -100*z up y right image_width/image_height*x look_at 50*y}

light_source {<100,100,-100>,1}

#include "colors.inc"
#include "woods.inc"

declare beam = box {
 <0,0,0><1,1,1>
texture {T_Wood20}
}

#declare ANGLE = radians(clock*360);

object {
 beam
 scale <1.9,35.56,1.27>
 translate <cos(ANGLE)*-22.86,43+sin(ANGLE)*-22.86,2.54>
}

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