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related to T49042
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Conflicts:
source/blender/editors/gpencil/drawgpencil.c
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Sometimes it can be useful to be able to keep onion skins visible in the
OpenGL renders and/or when doing animation playback. In particular, there
are two use cases where this is quite useful:
1) For creating a cheap motion-blur effect, especially when the before/after
values are also animated.
2) If you've animated a shot with onion skinning enabled, the poses may end
up looking odd if the ghosts are not shown (as you may have been accounting
for the ghosts when making the compositions).
This option can be found as the small "camera" toggle between the "Use Onion Skinning"
and "Use Custom Colors" options.
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Before this change, the stroke was filled only after complete the stroke drawing. For artist is better to get a feedback of the area he is filling while drawing, so this commit draws the filling area while drawing.
The triangulation of the stroke is recalculated every time the function is called because using a cache is not useful because the points information is changing all the time while the stroke is being drawing.
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Two new modal operators to create a grease pencil interpolate drawing
for one frame or a complete sequence between two frames. For drawing
the temporary strokes in the viewport, two drawing handlers have been
added to manage 3D and 2D stuff.
Video: https://youtu.be/qxYwO5sSg5Y
The operator shortcuts are Ctrl+E and Ctrl+Shift+E. During the modal
operator, the interpolation can be adjusted using the mouse (moving
left/right) or the wheel mouse.
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Improve current Grease Pencil in order to get a better 2D animation tool.
More info in WIKI pages: https://wiki.blender.org/index.php/User:Antoniov
Reviewed By: Severin, aligorith, campbellbarton
Patch by @antoniov, with edits by @Severin.
Differential Revision: https://developer.blender.org/D2115
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This was causing alignment issues which were only visible on a platform
of particular bitness, so it was easy to break stuff for 32bit when
working on 64bit platform and vice versa.
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After some test, a new iteration parameter has been added in order to
apply repetitive smoothing to the stroke. By default 1 iteration is applied,
but can used any number between 1 and 3.
The repetition uses different levels of intensity from 100% of the defined smooth
factor for the first loop, 50% for the second and 25% for the third. We use in each
loop a smaller value in order to avoid deform too much the stroke.
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Improve filling for concave shapes using a triangulation of the stroke.
The triangulation information is saved in an internal cache and only is
recalculated if the stroke changes.
The triangulation is not saved in .blend file.
Reviewers: aligorith
Maniphest Tasks: T47102
Differential Revision: https://developer.blender.org/D1705
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On second thought, these might be better names for these... I'm still not 100%
happy with these, but they will do for now.
(Best results currently seem to be with smooth 0.7, and subdivision steps 1 or 2)
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Improve the quality of current grease pencil strokes adding a new dynamic smooth and subdivision. The level of smooth and subdivide can be adjusted using UI parameters. These options are disabled by default in order to keep the grease pencil stroke compatible with any existing add-on.
Both parameters are defined at layer level.
Reviewers: aligorith
Differential Revision: https://developer.blender.org/D1866
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This commit merges all the work done in the GPencil_Editing_Stage3 branch
as of ef2aecf2db981b5344e0d14e7f074f1742b0b2f7 into master. For more details
about the changes that this brings, see the WIP release notes:
http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.77/GPencil
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This merge-commit brings in a number of new features and workflow/UI improvements for
working with Grease Pencil. While these were originally targetted at improving
the workflow for creating 3D storyboards in Blender using the Grease Pencil,
many of these changes should also prove useful in other workflows too.
The main highlights here are:
1) It is now possible to edit Grease Pencil strokes
- Use D Tab, or toggle the "Enable Editing" toggles in the Toolbar/Properties regions
to enter "Stroke Edit Mode". In this mode, many common editing tools will
operate on Grease Pencil stroke points instead.
- Tools implemented include Select, Select All/Border/Circle/Linked/More/Less,
Grab, Rotate, Scale, Bend, Shear, To Sphere, Mirror, Duplicate, Delete.
- Proportional Editing works when using the transform tools
2) Grease Pencil stroke settings can now be animated
NOTE: Currently drivers don't work, but if time allows, this may still be
added before the release.
3) Strokes can be drawn with "filled" interiors, using a separate set of
colour/opacity settings to the ones used for the lines themselves.
This makes use of OpenGL filled polys, which has the limitation of only
being able to fill convex shapes. Some artifacts may be visible on concave
shapes (e.g. pacman's mouth will be overdrawn)
4) "Volumetric Strokes" - An alternative drawing technique for stroke drawing
has been added which draws strokes as a series of screen-aligned discs.
While this was originally a partial experimental technique at getting better
quality 3D lines, the effects possible using this technique were interesting
enough to warrant making this a dedicated feature. Best results when partial
opacity and large stroke widths are used.
5) Improved Onion Skinning Support
- Different colours can be selected for the before/after ghosts. To do so,
enable the "colour wheel" toggle beside the Onion Skinning toggle, and set
the colours accordingly.
- Different numbers of ghosts can be shown before/after the current frame
6) Grease Pencil datablocks are now attached to the scene by default instead of
the active object.
- For a long time, the object-attachment has proved to be quite problematic
for users to keep track of. Now that this is done at scene level, it is
easier for most users to use.
- An exception for old files (and for any addons which may benefit from object
attachment instead), is that if the active object has a Grease Pencil datablock,
that will be used instead.
- It is not currently possible to choose object-attachment from the UI, but
it is simple to do this from the console instead, by doing:
context.active_object.grease_pencil = bpy.data.grease_pencil["blah"]
7) Various UI Cleanups
- The layers UI has been cleaned up to use a list instead of the nested-panels
design. Apart from saving space, this is also much nicer to look at now.
- The UI code is now all defined in Python. To support this, it has been necessary
to add some new context properties to make it easier to access these settings.
e.g. "gpencil_data" for the datablock
"active_gpencil_layer" and "active_gpencil_frame" for active data,
"editable_gpencil_strokes" for the strokes that can be edited
- The "stroke placement/alignment" settings (previously "Drawing Settings" at the
bottom of the Grease Pencil panel in the Properties Region) is now located in
the toolbar. These were more toolsettings than properties for how GPencil got drawn.
- "Use Sketching Sessions" has been renamed "Continuous Drawing", as per a
suggestion for an earlier discussion on developer.blender.org
- By default, the painting operator will wait for a mouse button to be pressed
before it starts creating the stroke. This is to make it easier to include
this operator in various toolbars/menus/etc. To get it immediately starting
(as when you hold down DKEy to draw), set "wait_for_input" to False.
- GPencil Layers can be rearranged in the "Grease Pencil" mode of the Action Editor
- Toolbar panels have been added to all the other editors which support these.
8) Pie menus for quick-access to tools
A set of experimental pie menus has been included for quick access to many
tools and settings. It is not necessary to use these to get things done,
but they have been designed to help make certain common tasks easier.
- Ctrl-D = The main pie menu. Reveals tools in a context sensitive and
spatially stable manner.
- D Q = "Quick Settings" pie. This allows quick access to the active
layer's settings. Notably, colours, thickness, and turning
onion skinning on/off.
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also fully remove freestyle raycasting_algorithm
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inittime in each stroke (value returned by PIL_check_seconds_timer() func), and then a delta time for each of its points, relative to that inittime.
These timing data can then be used during conversion to Curve objects, to create a path animation (i.e. an Evaluation Time F-Curve) exactly reproducing the drawing movements.
Aside from this "main feature", the patch brings several fixes/enhancements:
* Stroke smoothing/simplifying will no more move the start/end points of a stroke (this was rather annoying sometimes!).
* Also optimized smoothing code (even though not really noticeable on a modern computer, it now uses less memory and runs faster).
* When converting to curve, you now have the following new possibilities:
** Normalize the weight values (currently, they will get "stroke width * 0.1", i.e. would range by default from 0.0 to 0.3...).
** Scale the radius values to your liking (again, currently they are set from stroke width times 0.1)!
** Link all strokes into a single curve, using zero-radius sections (this is mandatory to use the dynamic feature!).
Here is a small demo video: http://youtu.be/VwWEXrnQAFI
Will update user manual later today.
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without the underscores these clogged up the namespace for autocompleation which was annoying.
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Causing a flurry of refresh file prompts post-commit,
Confusing local diffs and causing merge conflicts,
Stating the obvious; redundant and useless...
We shall not miss thou, blasted expand $keywords$
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have lines draw through the mesh.
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documentation done.
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It is now possible to make Grease Pencil Layers to keep displaying and editing the current sketch-frame with this option. This allows to draw a frame which contains markings made for different times (i.e. a spacing/timing chart that you can keep adding to as you scrub to different points on the timeline).
Use the clipboard/camera toggle (the one beside the visibility toggle) to enable. This should get an icon of its own at some point...
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shapes in 3D easier since it wont stick to every depth the line passes through.
- use a 8x8 area when finding stroke depths since thin lines can get ignored if the point is not close enough to them.
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draw over existing grease pencil lines. makes it easuer to draw 3D shapes with grease pencil.
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in the 3D view panel.
- account for parts of the line going off into infinity by making the stroke stretch between the last valid depth values (like an elastic band), if the endpoints are not over any geometry then use the closest valid depth.
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* Wrapped Grease Pencil datatypes in RNA.
* Hooked up Grease Pencil access in RNA (i.e. via Main, ID, and Scene)
TODO:
Updates to properties are currently lacking property-update calls, since there's no good notifier for this.
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Patch from Joshua, converting Grease Pencil to 2.5.
All GP data now is an ID block, allowing re-use, link and append.
For better contextual control within 2.5, these GP ID's will get
linked to actual data, like NodeTrees, Scenes, Images or Objects.
That will ensure Undo works, and opens up exciting new use cases
as well. :)
Patch note: on reading files, GPencils linked from editors will
get moved to the main library, using standard naming (indicating
where it was used), and with "Fake User" set. That way the user
can manually relink the pencils where appropriate.
We can check on just linking GP to some default, like 3d window
pencils to Scene? Nice to experiment with.
Notes for Joshua:
- for reading old GPencil, it has to use old code as well, meaning
to tread data as "indirect data, within another ID".
- Saving ID data means the chunk in file BHead needs the ID_GD code,
and not "DATA", which indicates 'indirect data'. That's the file
format spec.
- I've added do_versions_gpencil_2_50(), feel free to further tweak
things here, like linking things to scene or so.
- Formerly GPencil saved 2.50 files won't convert gpencil
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* Fix for #17808: Can't compile using SunCC - gpencil.c uses DOS line endings.
Added some svn-properties on gpencil files and also keyframing ones that I added, so that this shouldn't be a problem anymore.
* In Node Editor, it is now possible to close an open Grease Pencil panel when there is no node-tree being shown (i.e. after switching between node editing modes)
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Drawing Improvements:
* Single 'dots' now draw rounded
* Strokes being drawn are drawn 'solid' instead of as dotted lines
Eraser:
* Now operates interactively, so no more wait to see if stuff was erased
* An influence circle is now drawn - the radius of this is defined as the thickness^2
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Just a little commit so that I can transfer some changes back over to laptop.
* Line drawing should now be improved for most cases, but acute angles still need more work to reduce 'shrinking' artifacts. As such, this is still hidden behind 'rt' setting
* Preparation work for Grease-Pencil in Image Editor, and also 'Stick to View' for Image/Sequence editors.
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This commit introduces the ability to erase strokes. Admittedly, the code for this is not totally stable yet, and doesn't always produce optimum results. I'm committing now for backup purposes.
It currently uses the lasso code to check whether segments of the strokes (a segment occurs between two recorded points) occur inside a region defined by the 'eraser' stroke, or any intersections it makes with the 'eraser' stroke.
There are multiple ways to erase strokes:
* With 'Draw Mode' on, use RMB-drag to erase
* With a tablet, use the 'eraser' end of the stylus
* Hold the Alt Key, and use the 'selection' mouse-button (i.e. LMB if mouse-button swapping is on, RMB otherwise) to erase. For this one, this is necessary to avoid overriding the view-rotation hotkey combo for 2-button mice!
Todo:
* 3d-strokes are not correctly mapped back to screen-space for sampling yet
* Drawing of eraser strokes is still not distinctive enough
* After running a few times, may cause stack corruption/segfaults, so be careful!
== Bugfixes ==
* Grease-Pencil Onion-Skinning works again. Onionskining was being supplied the wrong frames, and the alpha factor was still the old one used for 0-255 ranged colour values
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Just preparation work for an eraser tool (as well as the code of a failed attempt at an implementation).
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New Stuff:
* Alt-XKEY / Alt-DelKey will now activate the Grease Pencil "Erase" menu. This will only show up when it's relevant (i.e. when there exists Grease Pencil data). It should make it faster to quickly delete the last stroke made. This hotkey has been added to the tooltips of the relevant buttons.
* Finished off colouring of 'active' layers panel so that they are now easily identify-able. This could also be done for Constraints, but the 'active' one isn't that important there.
Bugfixes:
* Fixed bug with drawing gp-data sources in the Action Editor, which resulted in missing icons.
* Fixed buttons in Grease Pencil panel. My hasty attempt last night at making the Action Editor to refresh was causing problems.
* Added a (hopefully temporary) button that will be used to prevent drawing from occurring with Shift-LMB. This is useful when trying to select stuff sometimes, with LMB as select-button, especially when selecting a bunch of closely spaced bones might be interpreted as a new stroke.
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Based on user feedback, I've made some changes to the Grease Pencil UI (most notably in 'Time Editing' facilities).
* 'Edit Timing' button gone
* Pin button and '<Grease Pencil Data' string gone from Action Editor
* Action Editor in 'Grease Pencil' mode now displays all grease-pencil datablocks for current screen.
* AE: GP-Datablocks are drawn like 'groups', with an expand/collapse button to show/hide layers. Its name shows the type of space it comes from, and shows indicative status info (i.e. for 3d-view, it shows view-angle)
* Added refresh calls for action editor after editing relevant data.
I haven't tested all tools yet, but most should be stable.
Also, I've removed some unnecessary buttons, and added a few tooltips. There's also some experimental code to try to get clearer indication of 'active' layer.
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Grease Pencil is a tool which allows you to draw freehand in some views, allowing you to annotate/scribble over the contents of that view in either 2d or 3d. This facilitates many easier communication and planning abilities.
To use, simply enable it from the View menu (choose 'Grease Pencil...' and click 'Use Grease Pencil'). Then, click+drag using the left-mouse button and the shift-key held to draw a stroke.
For more information, check the following page on the wiki:
http://wiki.blender.org/index.php/User:Aligorith/247_Grease_Pencil
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