On Monday 15 April 2002 5:37 pm, R. Lahaye wrote: > > Excuse me a momement, but why is that: > > (image_.height() - params.bb.yt) > > not > > params.bb.yb > > ? > > Ah, took me also some time to realize. > The picture is stored in memory from upper-left to lower-right > (see attachement). > Horizontally you still run from xl to xr, but vertically > you run from yt to yb, NOT reversed as you're thinking. > So you have to recalculate from the top, not the bottom. > The top is "height - yt". > > Does that make sense to you?
Indeed. I probably knew this once upon a time, but my mind is like a seive and it's easier to question than to remember. > > The patch works beautifully here! And here. I'll apply presently. Angus > > Regards, > Rob. > > > Angus
