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+--- Thread: Weighted Blend (/Thread-Weighted-Blend)
Weighted Blend - Animusmontus - 01-05-2019
Is there a plugin or a means to weight a shaped blend to certain predetermined points instead of the normal center of the shape?
RE: Weighted Blend - Ofnuts - 01-05-2019
Not directly, but you can:
1) apply a plain linear black to white gradient
[attachment=2457]
2) Use Curves (or, in the simpler cases, Levels) to map to another gradient.
[attachment=2458]
In other words, you can see the initial gradient as indicating how far you are from the border, and the Curves as mapping that distance from the border in to a grey level.
3) Once you are done, you can use Color>Map>Gradient map to transform that grayscale gradient in to any gradient:
[attachment=2459]
RE: Weighted Blend - Animusmontus - 01-06-2019
Thanks for the help, but that will not work. I will keep trying to write a script to do the work.
RE: Weighted Blend - rich2005 - 01-06-2019
Maybe as a starting point for a script. RMA_path_blend.scm Uses two paths and there are snags - the paths must have the same number of nodes + empty space to fill in.
http://www.silent9.com/incoming/scripts/ about 4 down
Comparison: https://i.imgur.com/MZxztVw.jpg
RE: Weighted Blend - Ofnuts - 01-06-2019
(01-06-2019, 03:36 PM)Animusmontus Wrote: Thanks for the help, but that will not work. I will keep trying to write a script to do the work.
If its a script, you can replace the Curves by a Gradient map with a gradient created on the fly.
Otherwise show an example of what you want to do.
Something like this: http://gimp-wrapmap.sourceforge.net/
Or this: https://sourceforge.net/projects/gimp-path-tools/files/scripts/ofn-gradient-along-path.zip/download
RE: Weighted Blend - Animusmontus - 03-01-2019
I am working on a height map. I have the land roughed in as a flat surface. The sea floor has been roughed in and edited. The mountains were already placed. I wanted a blend to go from the shore pixels to the mountain pixels. Using the builtin blend, the mountains would be surrounded by a hill. And I have recently given up on writing a script so far -- I keep running out of memory and am not sure where or what is eating the memory (16 GB or ram and 2 GB swap).
RE: Weighted Blend - Ofnuts - 03-01-2019
(03-01-2019, 02:16 PM)Animusmontus Wrote: I am working on a height map. I have the land roughed in as a flat surface. The sea floor has been roughed in and edited. The mountains were already placed. I wanted a blend to go from the shore pixels to the mountain pixels. Using the builtin blend, the mountains would be surrounded by a hill. And I have recently given up on writing a script so far -- I keep running out of memory and am not sure where or what is eating the memory (16 GB or ram and 2 GB swap).
Perhaps post an example picture?
RE: Weighted Blend - Animusmontus - 03-24-2019
Height Map Rough
RE: Weighted Blend - Ofnuts - 03-24-2019
I would try something like this:
- get a selection on the shore line
- then:
- duplicate the initial layer
- apply a blur
- repeat a couple of times with increasing blurs
- blend the layers: given them an opacoy of 1/N, N being their order in the stack from the bottom: lowest is 100%, next is 50%, then 33%, 25%...
[attachment=2738]
Assuming that you start with the selection already set, it should not be too hard to script if you want many layers.
For script help, see https://www.gimp-forum.net/Forum-Scripting-questions