On 28-9-2018 11:51, Kenneth wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> See my latest post in p.t.general. The yellow rod is situated about -200
>> pov units from the trace arrow.
>>
> 
> I got side-tracked by a surprising and different problem, concerning your test
> image. I rendered the same view (as close as I could get-- using CamAng of 80),
> and found that you and I are indeed getting different results(!) I have no idea
> what the reason might be. My 2nd 'blended' image shows that we are at least
> rendering the same view, and with the yellow rod in the same place. Why our red
> arrows don't match is a mystery! Very strange. (Unless we are somehow using
> different methodologies?? I doubt that, though.)
> 
> For the yellow rod in the position it's currently in, did you get the same
> screen_x_position and screen_y_position values that I did (or nearly so)?
> 
> This is a mystery that we definitely need to solve ;-)
> 
> 

My bad, as I misplaced the rod by one square :-/

The yellow rod is placed at: <202, 884> (screen percent) ==> <-2479.693, 
-265.968, -1757.000> (forget the Y which is not relevant here)

At <202, 884> percent, I get an arrow position of: <-2479.693, -265.968, 
-1627.254>

I have a hunch that you will get about the same. Forget about the 200 
pov units. It is less and not so 'rounded' as I thought (about 130 instead).

-- 
Thomas

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