Weekly Reports 2021

I did some cleanup and more work for the bézier stroke type project this week. Also spent a good amount of time preparing a devtalk thread including a few demos (bezier pen, curve sculpting, and armature modifier with bezier strokes).

GPencil: Cleanup armature deform code rBefc03eaf5947
GPencil: Free poly weights when curve is updated rB9ba1a842f22c
GPencil cleanup: Fix compiler warning rB79b8de937ea1
GPencil: Change UI name and icon for bezier pen rBa361ba405e58
GPencil: Set fixed resolution bezier pen rB8e5d577f08bb
GPencil: Allow bezier stroke sculpting rB38aa49eb71ed

April 12 - April 18 (week 16)

Bug Tracker

Involved in 14 reports:

Confirmed: 4

T87401, T87417, T87448, T86450

Closed as Resolved: 2

T87406, T87479

Closed as Archived: 4

T87375, T87397, T87371, T87461

Closed as Duplicate: 0

Needs Information from User: 2

T87412, T87410

Needs Information from Developer: 0

Helped/Investigated/Other: 2

T86888, T87415

Patches and commits

2 patches need review:

Fix T85051: Add bisect distance as a parameter to the mirror modifier D10201
Fix T87448: Avoid uiBut update if value was same D10976

3 Commits:

Fix T87406: Stroke color when using object color mode 7c18fb062d36
Fix compile error: Missing include paths 721ff6ad1226
Fix T87479: GPencil SVG export outside of camera 9ca55b10b8cc

Grease Pencil

This week, a few meetings were scheduled. Additionally, I finished the devtalk thread and published it:

Finished the devtalk thread on the bezier stroke type.
Meeting with the Grease Pencil team on Wednesday. Subjects were: Feedback on the state of the temp-gpencil-bezier-stroke-type branch, current priorities, patch review sprint, drawing issues (sparked discussion and creation of T87499).
Meeting notes on the LineArt meeting on Friday.

Work on the temp-gpencil-bezier-stroke-type was continued. The main focus this week was to introduce the geometry update flags and start working on weights. At the moment there are many issues regarding weights, e.g. no proper transfer when converting between stroke types, not handling weights in the edit mode operators for bezier strokes. and finally no support for weight painting. I began by making sure that weights were properly created when the polyline is created from the curve data.

GPencil: Remove update flags for stroke and curve (rB947d9e3b55b9, rBc01215f2dcc2, rBb8cdfea599c6)
GPencil: Hide handles in stroke mode (rBa58765031fd0)
GPencil: Add flags for polyline regeneration (rB928ad8e5b8cf)
GPencil: Use geom update flags in update functions (rB17ec934756cc)

April 19 - April 25 (week 17)

Bug Tracker

Involved in 19 reports:

Confirmed: 4

T87622, T87602, T87635, T87592

Closed as Resolved: 4

T87448, T87637, T86968, T87688

Closed as Archived: 5

T87632, T87566, T87697, T87735, T87743

Closed as Duplicate: 0

Needs Information from User: 5

T87575, T87560, T87649, T87645, T87527

Needs Information from Developer: 0

Helped/Investigated/Other: 1

T87415

Patches and commits

0 patches need review:

4 Commits:

Fix T87448: Avoid uiBut update if value was same. rBeb06ccc32462
Fix T87637: Dragging button value cancel not working. rBe1a9ba94c599
Fix T86968: Last UV factor in cyclic strokes rB183e3f6bb93e
Fix T87688: Crash entering valid text into number field rBbbb52a462ef9

Grease Pencil

I spent two days working on the weight data transfer from curve to polyline. This part is mostly finished now (rBc2f77b90f8ad, rB3a978cc0ec00, rB6e2cbeba9e82, rB73cd6eb982fa, rBf11cce2fd5b7). For the rest of the week, I looked into a new approach to do curve fitting. At the moment, we do a multi-dimensional curve fitting by treating position, pressure, strength, and vertex color as different dimensions of the curve. The problem is that all of the attributes except the position are not affected by the curve handles. We do an interpolation between two control points to generate e.g. the pressure. Since the curve fitting returns a multi-dimensional curve that has handles for all the attributes, the resulting curve we get is not ideal. My new idea is to do separate curve fittings for the attributes. This has two advantages:

We can choose what attributes we want to fit (e.g. there are cases where we know only specific attributes have changed so we only refit those)
We can treat attributes differently depending on their function (e.g. position will affect handles, pressure will not).

I began by implementing a function to find stationary points in a bezier curve (rB3a3f90cef1b1). This will be one of the core functions of the new fitting implementation.

April 26 - May 02 (week 18)

Bug Tracker

Involved in 30 reports:

Confirmed: 8

T87808, T87798, T87771, T87737, T87823, T87832, T87854, T87829

Closed as Resolved: 2

T86881, T87718

Closed as Archived: 11

T87811, T87813, T87769, T87763, T87834, T87846, T87861, T87862, T87869, T87877, T87893

Closed as Duplicate: 1

T87820

Needs Information from User: 4

T87833, T87858, T87778, T87840

Needs Information from Developer: 0

Helped/Investigated/Other: 4

T87527, T87841, T87843, T87795

Patches and commits

0 patches need review:

2 Commits:

Fix T86881: Curve Edit handle offset when snapping e0fa295bc6f2
Fix T87718: Fill triangles wrongly calculated ba755ea677b3

Grease Pencil

This week I took a bit of a break from implementing the new fitting algorithm and worked on various areas regarding the temp-gpencil-bezier-stroke-type branch. The most notable changes are:

Bézier Mode in Draw Mode: This change introduces a way to draw freehand curves. In the future, the plan is to have all drawing tools create bézier strokes in this mode. (rB327bf7442bce)
Curve smoothing algorithm: This was one of the remaining operators (GPENCIL_OT_stroke_smooth) that were unclear as to how they would work for bézier strokes. I came up with a solution that is fast as well as consistent with the poly stroke smoothing that we have already. (rBe70e618ce745)
Vertex paint for bézier strokes: Added initial support for vertex painting. At the moment this implements the Tint brush. (rB1ddc36d42d18)
Refactor of the dissolve operator: No functional changes. Introduces BKE_gpencil_editcurve_dissolve and moves all the logic into that function. This not only makes the code cleaner, but was also done in preparation for the GPENCIL_OT_stroke_merge_by_distance operator. (rB9a753fd70a92)

May 03 - May 09 (week 19)

Bug Tracker

Involved in 20 reports:

Confirmed: 3

T87984, T88038, T88094

Closed as Resolved: 2

T87983, T88058

Closed as Archived: 6

T87889, T87963, T88019, T88017, T88043, T88061

Closed as Duplicate: 0

Needs Information from User: 7

T87840, T87999, T87986, T87901, T87950, T87967, T88121

Needs Information from Developer: 0

Helped/Investigated/Other: 2

T87923, T88012

Patches and commits

1 patch needs review:

Fix T87984: GPencil pressure changes not handled D11153

2 Commits:

Fix T87983: Motion tracker button tooltips identical rBb24b197cec04
Fix T88058: Hover+return doesn't accept 0 as input rBec30cf0b742f

Grease Pencil

This week I did more work on the new fitting algorithm, although progress was slow and I ended up reverting some of the work I did. I worked on some of the other edit mode operators: 'Merge by Distance` was finished, the new smooth algorithm is now used in the smooth modifier, and I worked on the 'Sample' operator that will re-sample the bézier stroke to have curve points at the same distance. This last algorithm is not fully implemented yet.

Implement the smooth modifier for bézier strokes (rBe4c81a0a2b22, rB06abb9d99c79)
Implement 'Merge By Distance' for bézier strokes (rB87d5bd5fb063)

May 10 - May 16 (week 20)

Note: Thursday this week was a national holiday.

Bug Tracker

Involved in 22 reports:

Confirmed: 7

T88164, T88160, T87947, T88125, T87768, T88202, T88277

Closed as Resolved: 0

Closed as Archived: 6

T88154, T88163, T88192, T88215, T88211, T88279

Closed as Duplicate: 0

Needs Information from User: 2

T88120, T88136

Needs Information from Developer: 0

Helped/Investigated/Other: 7

T88130, T88141, T88128, T87973, T71780, T87848, T86923

Patches and commits

0 patch needs review:

0 Commits:

Grease Pencil

This week I was working on the sample operator for curves as well as a bug report (T88202). I created a patch that allows disabling grease pencil masks on a layer during render. This is especially useful for when you need to do the compositing after and just want the layers as they are with no masking.

GPencil: Add option to disable masks in view layer D11234

May 17 - May 23 (week 21)

I was on holiday this week.

May 24 - May 30 (week 22)

Note: Monday this week was a national holiday.

Bug Tracker

Involved in 9 reports:

Confirmed: 3

T88489, T88512, T88651

Closed as Resolved: 1

T88202

Closed as Archived: 3

T88493, T88619, T88657

Closed as Duplicate: 0

Needs Information from User: 0

Needs Information from Developer: 0

Helped/Investigated/Other: 2

T88529, T88664

Patches and commits

1 patch needs review:

Fix T88651: svg rect not using id as name D11429

1 Commit:

Fix: GPencil mask shows in view layer render rBd5a5575685b6

Grease Pencil

This week I looked into conversion between curve objects and grease pencil. With the new stroke type, it makes sense to convert curves into the bézier stroke type. Eventually I would like the code to handle the other way (so from grease pencil to curve) as well as import/export of SVG. I also worked on an issue (T88202) and added an option to disable masks during rendering of grease pencil layers in a view layer (see https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Grease_Pencil#Compositing for the release note of this feature).

GPencil: Add option to disable masks in view layer (rBSe459a25e6cbe)
GPencil: Convert curve objects to bezier strokes (rBe3547105dec4)

Other

I handled some reports on the bug tracker this week that ended up not being bugs, but rather small feature requests. I still worked on two that mades sense to me:

UI: Add light count to viewport statistics D11387
Python: Add init/cancel app handlers for save/load D11422

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Contents

User:Filedescriptor/Reports/2021

Weekly Reports 2021

January 04 - 10 (week 01)

January 11 - 17 (week 02)

January 18 - 24 (week 03)

January 25 - 31 (week 04)

February 01 - 07 (week 05)

February 08 - 14 (week 06)

February 15 - 21 (week 07)

February 22 - 28 (week 08)

March 01 - 07 (week 09)

March 08 - 14 (week 10)

March 15 - 21 (week 11)

March 22 - 28 (week 13)

March 29 - April 04 (week 14)

April 05 - April 11 (week 15)

Bug Tracker

Grease Pencil

April 12 - April 18 (week 16)

Bug Tracker

Grease Pencil

April 19 - April 25 (week 17)

Bug Tracker

Grease Pencil

April 26 - May 02 (week 18)

Bug Tracker

Grease Pencil

May 03 - May 09 (week 19)

Bug Tracker

Grease Pencil

May 10 - May 16 (week 20)

Bug Tracker

Grease Pencil

May 17 - May 23 (week 21)

May 24 - May 30 (week 22)

Bug Tracker

Grease Pencil

Other