GPencil: New bézier stroke type #85754
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Status:
In development.Team
Commissioner: @antoniov
Project leader: @filedescriptor
Project members: @pepe-school-land, @mendio
Description
Big picture: The goal is to make a bézier-curve-based workflow possible that covers all areas in grease pencil (Drawing, Editing, Sculpting, etc.).
Work plan
**{icon check-circle color=green} Milestone 1 - Remove Curve Editing toggle Remove the curve editing-related UI elements and code (like the keymap).{icon check-circle color=green} Milestone 2 - Selection operators **
Adapt the selection operators to work for curves and strokes simultaneously. Some of the selection code might need a refactor as well.
Additional changes:
**{icon check-circle color=green} Milestone 3 - Conversion operators **
To convert between the two types we need a "Set Stroke Type" operator.
**{icon check-circle color=green} Milestone 4 - Transform **
The transform code will have to be implemented. The
TransDatacan no longer be separated for strokes and curves and will have to take both into account.Note: The code is implemented and has been tested, but there could still be some bugs. Needs more thorough testing.
Milestone 5 - Editing operators and modifiers
Operators
Adapt/implement all the editing operators. Some of these might only need minor changes like checking if a stroke is a curve and then calling the right function (the bulk has already been implemented).
Note: This can be more efficient and more 'correct' if we project the curve points instead of the stroke points)Note: The conversion could use the curve data to make it more efficient and accurate)Modifiers
Adapt modifiers to work with Bezier type.
deformStroketodeformPolyline. (ccbe9d7ab15f)deformBezier. (fa7c2b6b22aa)This modifier is not using deformStroke callback)This modifier uses deformStroke but the strokes are not editable, so no changes needed.)This modifier is not using deformStroke callback)Milestone 6 - Sculpting, weight painting and vertex painting
Sculpting curves is similar to sculpting strokes. In fact, the only difference is that with curves, we sculpt the stroke points and then refit the curve after the operation. In order to make this work properly though, we need to be able to do partial curve refitting.
Sculpting
BKE_gpencil_stroke_editcurve_updateto handle partial updates.BKEto do partial curve updates.Weight painting
Vertex painting
brush_blur,brush_average,brush_smear,brush_replaceMilestone 7 - Drawing curves
To make curves part of all areas, we need at least one way to create curves directly in Draw Mode. There are multiple ideas:
Branch:
temp-gpencil-bezier-stroke-typeChanged status from 'Needs Triage' to: 'Confirmed'
Added subscribers: @filedescriptor, @mendio, @antoniov, @pepe-school-land
Added subscriber: @SimplSam
GPencil: Next steps for curve editingto GPencil: New bézier stroke typeAdded subscriber: @laurelkeys
Added subscriber: @Gabi_love
Do you believe this will be included in 3.0?
Added subscriber: @ok_what
Added subscriber: @hamza-el-barmaki
any update for 3.3 or 3.4 ? or waiting for new curve structure data block and then ....?
Changed status from 'Confirmed' to: 'Archived'
@hamza-el-barmaki This project is now being replaced by a more general proposal. See https://devtalk.blender.org/t/developer-discussion-new-grease-pencil-data-structure-proposal .