I know. Bear with me.

I started out on a small povray project.

It wasn't going at all well well, despite me being pretty familiar with
cartesiain geometry. I googled. I read. I looked at many tutorials.

I simplified what I was doing.

A lot.

In the end I realised my problem; despite all the documentation:

http://www.povray.org/documentation/view/3.6.0/15/

stating that +x is to the right, I'm getting it on the left.

My limiting case is attached (axes.pov)

#macro axes()
 cylinder{<0,0,0>,<100,0,0>, .05
  pigment { color rgbf  <0.0, 0.0, 1.0, 0.0>}  // bright blue is +X
        }
 cylinder{<0,0,0>,<-100,0,0>, .05
  pigment { color rgbf  <0.0, 0.0, 0.3, 0.0>}  // blue is X
        }
 cylinder{<0,0,0>,<0,100,0>, .05
  pigment { color rgbf  <0.0, 1.0, 0.0, 0.0>}  // bright green is +Y
        }
 cylinder{<0,0,0>,<0,-100,0>, .05
  pigment { color rgbf  <0.0, 0.3, 0.0, 0.0>}  // green is Y
        }
 cylinder{<0,0,0>,<0,0,100>, .05
  pigment { color rgbf  <1.0, 0.0, 0.0, 0.0>}  // bright red is +Z
        }
 cylinder{<0,0,0>,<0,0,-100>, .05
  pigment { color rgbf  <0.3, 0.0, 0.0, 0.0>}  // red is Z
        }
#end

camera {
 location <100, 100, -120>   // Where the Camera is located <x,y,z>
 look_at <0, 0, 0>    // Where is the camera is looking <x,y,z>
 direction <0, 400/25.4, 0> // 400mm lens
}

light_source {
 <10, 15, -20>  // Location of the light
 color rgbf <2.0, 2.0, 2.0, 0.0>   // The RGB Color of the light (White)
       // Including transparency factor (f)
}

axes()

I ran as:
povray -Iaxes.pov +V +D0 +P +X100 +FP16 +Oout.ppm -H600 -W800

Here's the result:

http://i48.photobucket.com/albums/f234/bugbear33/misc/out.png

Bright blue ON THE LEFT.

Version:

Persistence of Vision(tm) Ray Tracer Version 3.6.1 (g++ 4.6.0 @
 x86_64-unknown-linux-gnu)

I assume I'm doing something so inept and *unthinkable* it will be hard for you
all to guess.

Help gratefully accepted.

 BugBear

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