User:Chris Blackbourn/WeeklyReports2023

See also WeeklyReports2022

Calendar Week 1

January 3 - January 9

• Fix T103469 Very bad UV "sphere projection" unwrap commit
• Investigate T103670 UV Editing: Lock Borders - Incorrectly defines borders
• Differential Simplify matrix multiply logic (Part 1 of 2)
• WIP UV Grid Unwrap

Calendar Week 2

January 10 - January 16

• Fix T103787 T103670. UV islands with mark seam would tear at boundaries. Differential Cleanup Commit
• Debug T103707 UV Select Overlap incorrectly detects some faces as overlaps
• WIP Simplify Matrix Multiply (Part 1 of 2)
• Investigate T99249 Ply Exporter broken with use_uv=True if uv non-unique
• Investigate T102683 Triangulation of UVs in UV editor
• Investigate T103868 2D Transform gizmo not drawn and non-responsive if it would have zero area.
• WIP UV Grid Unwrap

Calendar Week 3

January 17 - January 23

• Grid Unwrap UV, Design review build now for download
• Simplify matrix logic commit Part 1 of 2
• WIP Simplify matrix logic (Part 2 of 2) (offline)
• Fix regression, T103971 Live unwrapping wraps hidden faces commit
• Investigate T103868 UV Manipulator disappears if AABB of selection has zero area.
• WIP extended feature T103469 UV "sphere projection" unwrap with Seams

Calendar Week 4

January 24 - January 30

• Fix T98594, UV Editor Redraw problem with geometry nodes. commit
• Fix T103868, Missing UV Transform gizmo if it has zero area. commit
• Resolve T103975, Add UV Select Similar Object and UV Select Similar Winding. commit
• Investigate T103956, UV Sculpt brushes should work in multi-object edit mode.
• Cleanup UV winding calculation, reducing memory allocation pressure. commit

• WIP Grid Unwrap (offline)
• WIP Merge UV Packing Engines. (offline)

Calendar Week 5

January 31 - February 6

• Add UV Seam support for UV Sphere Unwrap Differential

• WIP Grid Unwrap (offline)
• WIP Merge UV Packing Engines. (offline)

Calendar Week 7

February 7 - February 13

• Gitea migration

• UV Alternate face selection Issue Download

• WIP Grid Unwrap (offline)
• WIP Merge UV Packing Engines. (offline)

Calendar Week 8

February 14 - February 20

• More Gitea migration

• UV Alternate face selection, now with click-select, lasso select, circle select and rectangle select. Updated version Download
• Test and Fix for mul_m3_series and mul_m4_series with aliased parameters Pull Request
• Add seam support to UV Sphere Project and UV Cylinder Project Pull Request

Calendar Week 9

February 21 - February 27

• Migrating WIP from previous blender repo to gitea.
• Commit fix for mul_m3_series and mul_m4_series commit
• Packing research, incremental migrate from Editor to bf_geometry. Pull Request

Calendar Week 10

February 28 - March 6

• Update UV Sphere Projection and UV Cylinder Projection with Seam support. commit
• Migrate UV packing from Editor to bf_geometry commit
• Investigate advanced "Minimize Stretch" techniques with Julien Kaspar

• WIP Fix #102843: Add UV Packer with O(nlogn) performance. Pull Request

Calendar Week 11

March 7 - March 13

• Fix #102843. Add novel UV Packing strategy, the incredibly fast "Alpaca", ("L-Packer") which packs in O(n log n) time complexity. commit

• Fix unreported UV regression, margin was offset. commit

• UV Cleanup commit commit commit commit commit commit commit commit

• WIP Alpaca_Rotate, the fast L-Packer which also supports rotation.

Calendar Week 12

March 14 - March 20

• Improve packing efficiency on non-square materials. commit
• WIP xatlas packer, the brute force, bitmap occupancy, packer that supports irregular shapes. Pull Request
• WIP Alpaca_Rotate, the fast L-Packer which also supports rotation.

Calendar Week 13

March 21 - March 27

Detail from xatlas packing of UVFreeze.blend

• Add xatlas packer, the brute force, bitmap occupancy, packer that supports irregular shapes. commit

commit commit

• WIP Alpaca_Rotate, the fast L-Packer which also supports rotation.

Pull Request

• Investigate 105860, Crash when adding UV Layer.

• Planning "perfect" packer, the packer which produces optimal results for some inputs. e.g. optimal square packing

Calendar Week 14

March 28 - April 3

• Investigate #106314 UV Copy/Paste problem (Issue for 3.5 backporting)

• Fix #78396 Pack UVs to original bounding box. commit

• Add Alpaca_Rotate, the fast L-Packer which also supports rotation. commit

• Change packing to use a {pivot, half-diagonal} representation commit

• UV Packing cleanup commit commit commit commit commit commit

• Simplify aspect ratio usage in UV Unwrapper commit

• Improve performance of xatlas strategy when packing aligned quads commit

• WIP support rotation in the xatlas packer (offline)

• Planning "perfect" packer, the packer which produces optimal results for some inputs. (offline)

Calendar Week 15

April 4 - April 10

• Add support for non-square bitmaps in alpaca_rotate commit

• Add rotation in the xatlas UV Packer commit

• UV Packing cleanup commit

• Fix #106314, UV Paste operator, warn when fail to find a match (commit) and return OPERATOR_CANCELLED when no change to prevent creating an UNDO state. (commit)

• Adding "job" support to UV Packer, to add a progress bar and stop button. (WIP)

• Adding UV Packing new feature, "Overlapping islands stick together" (WIP)

• Planning: pin support for UV Packing. (offline)

• Planning "perfect" packer, the packer which produces optimal results for some inputs. (offline)

Calendar Week 16

April 11 - April 17

Overlapping islands remain overlapping after packing. Useful for games and low poly assets.

Mostly clean up work, paving the way for a few new packing features (Pack overlap, pin support, jobs)

• New feature for UV Packing, "Overlapping islands stick together" commit

• UV Packing, move pre-rotation inside packing engine commit

• UV Packing cleanup commit commit commit commit

• UV Unwrap cleanup commit

• Planning "perfect" packer, the packer which produces optimal results for some inputs. (offline)

Calendar Week 17

April 18 - April 24

As Blender 3.6 enters Bcon2, mostly clean up work, checking regressions and investigating repros.

• Updating documentation for Blender 3.6. (Awaiting write-access to svn commit)

• Planning UV improvements for Blender 4.0

• Planning "perfect" packer, the packer which produces optimal results for some inputs. (offline)

Calendar Week 18

April 25 - May 1

Optimal packing with n=1 islands. Notice how the single island touches all four sides of the unit square.

• More updating documentation

• UV Packing, rotate to minimum square Commit

   UV Packing now produces optimal layouts for the important n=1 case on all inputs and options.
   (e.g. The UV Unwrapper often produces a single island, which can now be packed optimally into the unit square.)

• Add new UV Packing option, scale_to_fit, to pack without scaling Commit

• Fix UV Packing regression with fraction margin method when UVs don't fit in unit square. Commit

• Preparing to add progress bars and "stop" functionality to UV packing. Commit Commit

Calendar Week 19

May 2 - May 8

An optimal packing of 67 uniform quads. The layout shown is slightly tighter than a 9x9 grid with 14 quads missing.

• UV Packing, improve UV layout efficiency. Commit

   UV packing now produces optimal layouts for many uniform-square packing inputs.

• UV Packing, add multiple options for pinned islands, lock scale, lock position etc. Commit

• Improve UV Packing efficiency further by re-ordering packing operations. Commit

• Debugging and partial fix for #104513, different UV unwrap results on x86_64 and apple silicon CPUs. Commit

Calendar Week 20

May 9 - May 15

• (With Campbell), Add progress bar and ability to cancel UV Packing Commit

• Add Pinned islands support for UV Packing Commit

 - Ignore pinned islands
 - Normal (default)
 - Lock scale
 - Lock rotation
 - Lock position of pinned UV islands.

• Further efficiency improvements for UV Packing Commit

• Fix #107898: UV Packing regression Commit

• Debugging #104513, different UV unwrap results on x86_64 and apple silicon CPUs.

Calendar Week 21

May 16 - May 22

• Debugging #104513: Different UV unwrap results on x86_64 and apple silicon CPUs.

• Debugging #108117: Crash in uv editor with hidden geometry (PR in progress)

• UV: Packing problems with locked-position. Pull Request

• UV: Fix packing problem with locked-position and large island count Commit

• UV: Fix packing problems with locked islands. Commit

• WIP: SculptUV on multiple objects (large!)

• Investigate circle packing (offline)

Calendar Week 22

May 23 - May 29

• Online meeting with artists from a major games studio which uses Blender to discuss enhancements for Vertex Color Attributes. (More to come here)

• UV: Add additional options for rotation while UV Packing, "Any", "Cardinal" and "Axis-Aligned" commit

• Debugging #104513: Different UV unwrap results on x86_64 and apple silicon CPUs.

• UV: Fix additional packing problems with locked-position and original-bounding-box. commit

• UV: Update UI for UV Packing Pull Request

• Fix #108117: Crash in uv editor with hidden geometry commit

• Debugging #108222: Copy/Paste UVs sometimes merges vertices

• Fix #108037, Omnibus UV packing problems. commit commit commit

Research continues on "Optimal" packing, for n=11 and n=17 squares.

Calendar Week 23

May 30 - June 5

Updated UI for UV Pack Islands

Packing 18 quads into the unit square, optimally

• Add optimal packing for n=11, n=18, n=19 and n=26 squares. commit

• Update UI for the Pack Islands operator commit

• Fix a memory leak during Pack Islands commit

• Write proposal for Channels in the Vertex Paint Mode #108404

• Update manual with latest UV Packing changes PR