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+---- Thread: dynamics not working in gimp-drawable-edit-stroke-item (/Thread-dynamics-not-working-in-gimp-drawable-edit-stroke-item)
dynamics not working in gimp-drawable-edit-stroke-item - jonker - 02-28-2024
I want to draw perpendicular lines to a path within a selection. This can be done in gimp by selecting the right brush with the correct settings and then stroking a path with the the paintbrush or pencil. When I try to use the same settings in python-fu the stroked portion simply stays vertical. I have noted that during the manual stroke selection there is an "Emulate brush dynamics" option which is selected. I cannot find a similar setting in the python-fu api.
There might be some other issues in the script since this is my second python-fu script:
Code:
#!/usr/bin/env python
# GIMP Python plug-in template.
from gimpfu import *
def hay_selection(img, layer) :
gimp.progress_init("Finding next tree ring " + layer.name + "...")
# Set up an undo group, so the operation will be undone in one step.
pdb.gimp_undo_push_group_start(img)
# Do stuff here.
pdb.gimp_context_push()
# Base grey color
pdb.gimp_context_set_foreground(gimpcolor.RGB(224,224,224))
pdb.gimp_drawable_edit_fill(layer, FOREGROUND_FILL)
# Path around selection
pdb.plug_in_sel2path(img, layer)
np = pdb.gimp_image_get_active_vectors(img)
pdb.gimp_context_set_foreground(gimpcolor.RGB(0,0,0))
pdb.gimp_context_set_paint_method("gimp-paintbrush")
pdb.gimp_context_set_brush("2. Block 03")
pdb.gimp_context_set_dynamics("Track Direction")
pdb.gimp_context_set_brush_aspect_ratio(-20)
pdb.gimp_context_set_brush_size(15)
pdb.gimp_context_set_brush_angle(0)
pdb.gimp_context_set_brush_spacing(10)
pdb.gimp_context_set_brush_hardness(1)
pdb.gimp_context_set_stroke_method(1)
pdb.gimp_message("Dynamics: " + pdb.gimp_context_get_dynamics())
pdb.gimp_drawable_edit_stroke_item(layer,np)
# Fill interior with Hay Small
pdb.gimp_context_set_pattern("Hay Small")
pdb.gimp_selection_shrink(img,7)
pdb.gimp_drawable_edit_fill(layer, PATTERN_FILL)
# Cleanup
# pdb.gimp_image_remove_vectors(img,np)
pdb.gimp_context_pop()
# Close the undo group.
pdb.gimp_undo_push_group_end(img)
register(
"python_fu_hay_selection",
"Selection to Hay",
"Adds edge and fill to selection for hay.",
"jonker",
"jonker",
"2024",
"<Image>/Python-Fu/Selection to Hay...",
"*", # Alternately use RGB, RGB*, GRAY*, INDEXED etc.
[],
[],
hay_selection)
main()RE: dynamics not working in gimp-drawable-edit-stroke-item - Ofnuts - 02-29-2024
The doc in the PDB browser doesn't mention dynamics in the context settings that affect the call.
I have a script that does something like this (ofn-brush-strokes-on-path), and it computes and sets the brush angle before each stroke.
RE: dynamics not working in gimp-drawable-edit-stroke-item - jonker - 02-29-2024
Thank you for the response. I thought dynamics might work since that is the default. Oh well.
I rewrote the code calling ofn-brush-strokes-on-path. It is working now, except for the undo groups. It seems like I cannot use the undo groups now that I am calling ofn-brush-strokes-on-path. It won't even let me start and stop the undo before or after the call. Any suggestions on that would be appreciated.
Code:
#!/usr/bin/env python
# GIMP Python plug-in template.
from gimpfu import *
def hay_selection(img, layer) :
gimp.progress_init("Turning into Hay Pile " + layer.name + "...")
# Set up an undo group, so the operation will be undone in three steps.
# This is the interior undo step
# image.undo_group_start()
# Do stuff here.
gimp.context_push()
# Base gray color
pdb.gimp_context_set_foreground(gimpcolor.RGB(224,224,224))
pdb.gimp_drawable_edit_fill(layer, FOREGROUND_FILL)
# Path around selection
pdb.plug_in_sel2path(img, layer)
outerpath = pdb.gimp_image_get_active_vectors(img)
# Fill interior with Hay Small
pdb.gimp_context_set_pattern("Hay Small")
pdb.gimp_selection_shrink(img,7)
pdb.gimp_drawable_edit_fill(layer, PATTERN_FILL)
# Inner Path
pdb.plug_in_sel2path(img, layer)
innerpath = pdb.gimp_image_get_active_vectors(img)
#Build Rim Selection
pdb.gimp_image_select_item(img,CHANNEL_OP_REPLACE,outerpath)
pdb.gimp_image_select_item(img,CHANNEL_OP_SUBTRACT,innerpath)
pdb.gimp_context_set_foreground(gimpcolor.RGB(0,0,0))
pdb.gimp_context_set_paint_method("gimp-paintbrush")
pdb.gimp_context_set_brush("2. Block 03")
pdb.gimp_context_set_brush_aspect_ratio(-20)
pdb.gimp_context_set_brush_size(15)
pdb.gimp_context_set_brush_angle(0)
pdb.gimp_context_set_brush_hardness(1)
# Close the undo group to allow brush strokes to work
# image.undo_group_end()
pdb.gimp_layer_resize_to_image_size(layer)
pdb.python_fu_ofn_brush_strokes_on_path(img,layer,0,4,1,0,100,4,'{pathName}-{brush1}/{count}')
pdb.plug_in_autocrop_layer(img,layer)
# Cleanup
# This is the cleanup undo step
# image.undo_group_start()
pdb.gimp_image_select_item(img,CHANNEL_OP_REPLACE,outerpath)
pdb.gimp_image_remove_vectors(img,innerpath)
pdb.gimp_image_remove_vectors(img,outerpath)
gimp.context_pop()
# Close the cleanup undo group.
# image.undo_group_end()
register(
"python_fu_hay_selection",
"Selection to Hay",
"Adds edge and fill to selection for hay.",
"Jonker",
"Jonker",
"2024",
"<Image>/Python-Fu/Selection to Hay...",
"*", # Alternately use RGB, RGB*, GRAY*, INDEXED etc.
[],
[],
hay_selection)
main()RE: dynamics not working in gimp-drawable-edit-stroke-item - Ofnuts - 03-01-2024
Hmm. As far as I know you can nest undo group (ie, yours, and mine nested in it). What do you means by " It won't even let me start and stop the undo before or after the call"?
RE: dynamics not working in gimp-drawable-edit-stroke-item - jonker - 03-01-2024
If I uncomment the undo_group_start and undo_group_end then the script silently does nothing. Wondering if nesting was a problem, I setup an undo_group_start and then before calling the ofn_brush_strokes_on_path I ran an undo_group_end. This removed the nesting question. The silent quitting remained. The only way to get the script to work is if I avoid working with the undo group. With the undo_group commands commented out, as shown above, the script runs fine.
Right now I am wondering if there is some sort of problem with included files or something like that.
RE: dynamics not working in gimp-drawable-edit-stroke-item - Ofnuts - 03-01-2024
In your code I see image.undo_group_start() but you image variable is called img so that should be img.undo_group_start() (and of course img.undo_group_end()) You can also add a try/except block in your code to catch all errors and report them with a gimp.message().
RE: dynamics not working in gimp-drawable-edit-stroke-item - jonker - 03-01-2024
Of course! I should have seen that. Thank you it is working fine nested now. Thank you so much for your help.