On Sep 17, 2007, at 3:09 AM, Alan W. Irwin wrote:

> On 2007-09-17 00:17-0400 Hazen Babcock wrote:
>
>> Now it is my turn to apologize for all the noise. As you originally
>> suspected, I was not calculating the transformation matrix  
>> correctly in
>> plptex3 and in plmtex3. This should be fixed now in v7869 and was  
>> tested with
>> the xwin and xcairo drivers.
>
> With this revision I noticed there are still two issues for -dev  
> psc and one
> issue (newly introduced?) for -dev pscairo.
>
> (1) The size of the "a" series as the series progresses becomes  
> much too
> large for -dev psc but looks reasonable for -dev pscairo.  (This  
> reminds me
> of the pscairo issue we used to have with size for the 3D numerical  
> tick
> mark labels.)
>
> (2) The size of the "six" and "four" become too large as the azimuth
> approaches 90+270 (e.g., try it for 80+270) for -dev psc but not - 
> dev pscairo.
> (Again, this reminds me of the pscairo issue we used to have with  
> size for the
> 3D numerical tick mark labels.)

It was the same issue. I was using the shear matrix:
[ 1 tan(phi) ]
[ 0        1      ]

You favor (and the other PLplot core functions use):
[ 1 sin(phi)  ]
[ 0 cos(phi) ]

Anyway, this should be fixed in v7870.

> (3) The angle of the numerical labels for the tick marks for the  
> right-hand
> Z axis and the Y axis appear to be twisted from being parallel with  
> the Z
> axis for -dev pscairo but not for -dev psc. This effect is small but
> probably most obvious for an azimuth of 80+270.  I believe this  
> effect used
> to be in -dev psc, but now due to your core changes it has been  
> "moved" to
> -dev pscairo. I suspect this is due to some minor inconsistency in
> interpretation between core and the traditional devices that was  
> removed by
> your last core change but also introduced to the cairo devices by  
> that same
> core change.

Do you still see this?

-Hazen


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