Hi Walt,
Instead of telling us what you have done, and that it apparently
doesn't do what you want it to do, is there a chance that you can just
tell us in good old plain English what it is you are expecting to
accomplish? Maybe there is an easier way to do what you want to do
that will not produce the chain of events you've described, since I
think many of us have ways of doing things that use our own
approaches. And there is usually more than one way to skin a cat in
Revolution. Just a thought.
Joe Wilkins
On Jun 4, 2009, at 7:11 PM, Sumner, Walt wrote:
Can anyone shed some light on using paint tools and imagedata on
images in a bg group?
Here's my situation: I have either 1 or 3 pictures to generate, each
held by a separate image object. The user adjusts a bunch of
settings and then presses a button to generate new pictures. To let
the user see what is happening, the first is always visible, and is
supposed to update frequently.
Because the new picture might look a lot like the old picture, the
script selects some gray color and uses the pencil to draw
horizontal lines over the first picture. This is fairly quick and
gives a clear impression that the picture is being rebuilt. This
works fine if the image is not part of a group. It works if the
image is not the only image in a group. It seems not to work if the
image is the only image in a group (Rev takes enough time to draw
gray over the image, but no partially or fully gray image ever
appears).
Next step is to generate new images. I take the imagedata for the
all gray image, which is automatically the right size, make copies
as needed for additional images, and then run through the pixels of
each imagedata copy, inserting RGB values calculated on the fly.
This is 300x faster than using paint tools. After every 1024 pixels,
the script sends the imageData on the screen, so it looks like the
image is redrawing a line or a few lines at a time. This works fine
if the image is not part of a group and the script includes "unlock
screen" commands. It seems not to work if the image is in a group.
Finally, the imagedata of the first image is set to the 1st
imagedata, the imagedata of the second image is set to the 2nd
imagedata, and same for the third. If all three images are in a
group with bg behavior, the second and third look right and the
first never updates - it's just gray. This problem persists with a 1-
card stack. If all three images are not in a group, they all work
fine.
This application lends itself to making many cards bearing different
pictures, so I was hoping to put images in a group with bg behavior.
However this seems not to work. I expect that I can remove the
images from the group and make new image objects as needed, but what
a kluge. Any thoughts on what is going wrong?
Rev Ent 3.5.0 dp7 build 820, Intel Macbook Pro OSX, 10.5.5
Thanks,
Walt Sumner
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