Thanks, everyone.

 Now I am learning step by step. Thank you for your help.

Jong

Bob Hughes wrote:

> /* Printing a Number to Screen */
>
> #declare Rs=seed(clock*1234);
>
> #declare YourGeneratedNumber=int(rand(Rs)*360);
>
> #declare ExtractedNumber=
>   concat("N",str(YourGeneratedNumber,0,3)) // YourGeneratedNumber is angle.
>  // up to three digits starting from left and no decimal (i think).
>
> #declare PrintedNumber=
>  concat("The Angle is: ", substr(ExtractedNumber,2,3))
>  // skips "N" from previous concat()
>
> #declare cam_l = <.6,5.4,16>;
> #declare cam_lat = <15,1,24>;
>
> #local CamZ = 2; // amount of camera zoom you want
>
> #local CamD = vnormalize(cam_lat)//,cam_l);
> #local CamR = vnormalize(vcross(y,CamD));
> #local CamU = vnormalize(vcross(CamD,CamR));
>
>  text{ttf "timrom.ttf",PrintedNumber,0.05,0
> // use the text placement stuff here.
>     pigment { rgb 1 }
>     finish { ambient 1 diffuse 0}
>   scale .05
>   translate <-.65,-.48,CamZ>
>   matrix < CamR.x,CamR.y,CamR.z,
>            CamU.x,CamU.y,CamU.z,
>            CamD.x,CamD.y,CamD.z,
>            cam_l.x,cam_l.y,cam_l.z >
> }
>
> camera {
>   location cam_l
>   up CamU
>   right CamR*4/3
>   direction CamD*CamZ
> }
>
> Hopefully this is what you had in mind, and can change it to work okay in the
> way you need.
> Please ignore my other reply since it was totally wrong.
>
> Bob
>
> "J. Kim" <jjk### [at] mmewhaackr> wrote in message
> news:388FEFA6.7C63EE3D@mm.ewha.ac.kr...
> | Dear POV'ers,
> |
> |  I am raytracing my object by rotating light_source(point) around
> | X-axis, Y-axis, or Z-axis based on
> | Chris Colefax's animation utility.
> | I'd like to identify each output(PNG) by writing the angle values
> | somewhere in the corner.
> | For example, ang. 35(X), or ang. 72(Y), and so on.
> |  I do not know how I could get the value of the variable during the
> | animation for each output, and pass
> | the value to the font.
> | Any help would be appreciated.
> | === part of my animation === there are 8 or 13 frames for each axis.==
> | // light source rotation around Z-axis 0 to -180degree
> | light_source { <-86.6,0,-50.0> color rgb<1,1,1>*2.5
> |              rotate
> |              From(0.0,< 0,0,0>)
> |              Using("",1,1,"")
> |              To(1, <  0,0,-180>)
> |              }
> |
> | -------
> | Jong
> |

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