Hi,
My plugin is experiencing a problem where in certain cases it will keep
rendering repeatedly without displaying the result on the screen - while
rendering repeatedly, the upstream nodes flash yellow to indicate they are
processing. In most cases the plugin functions correctly, but the problem
can occur in special cases such as, for example, you view the alpha channel
of a merge node that's downstream of my plugin. (I suspect I might not be
handling channels correctly?)
I don't know where the cause of the problem is, but I figure it's worth
investigating the part of the plugin that I don't fully understand yet.
I'm wondering exactly what does the "set_out_channels()" function do?
Inside _validate() I am using "set_out_channels(DD::Image::Mask_All)", but
I don't really understand what that does. Does it matter that
"set_out_channels" is called after "copy_info()" rather than before? My
_validate looks more or less like this:
_validate(bool for_real){
for(unsigned int i = 0; i < INPUT_IMAGE_COUNT; ++i){
DD::Image::Iop::input(i)->validate(for_real);
}
DD::Image::Iop::copy_info();
set_out_channels(DD::Image::Mask_All);
}
My plugin takes 2 input images (both required), and to render a pixel it
must request the entire row of pixels from both input images. It outputs
all channels that are in the first input image, and reads only one channel
from the second input image.
I'm using Nuke7.0v6 in Windows 7
Any advice or ideas would be great!
Thanks,
-Derek
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