Cause: puppet::solve binds each moving pin to its nearest mesh vertex and fixes
that vertex at position + (vertex - rest), an offset in rest space with no
rotation or scale. puppet.addPin set a new pin's position to the click, so in
a bent region the bound vertex was pulled to where it would be unrotated, and
the mesh jumped as soon as the pin was added.
Fix: addPin picks the position that keeps the bound vertex at its current
deformed place: the vertex's deformed position minus the rest offset. On an
unbent mesh that is the click itself (round-off is snapped back to it), so
existing pins behave as before.
Test: a_pin_added_to_a_bent_mesh_moves_nothing (two pins, one moved to bend
the layer, then pins added at three places on the bent part: at most a few
edge pixels change from solver round-off; before the fix about 250 did).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QiAJeFttZp83Fh7YuzAR5f
(cherry picked from commit 16151203b304d565b425873fdd33ae082cae483b)
With one Position pin and no Bend pins, every rotation and scale about the
pin is free in the ARAP energy. The 1e-9 regulariser (about 1e-12 after the
edge-length scaling) is too weak to hold them, so the CG solve turned
round-off into a visible rotation of several pixels, depending on where the
pin landed. The exact solution is the rest mesh translated by the pin's
offset, so deform() returns it directly in that case.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Liquify stores its strokes as effect data and replays them into a cached
displacement mesh; liquify.stroke / liquify.clear commands for agents.
Rolling Shutter Repair measures motion with effectcraft-track KLT (new
effects -> track same-layer edge).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Paint: non-destructive Paint effect with Brush/Clone/Eraser stroke groups
(Path, Stroke Options, Transform, Duration spans, Write On End keys),
dab rasterizer (diameter/angle/roundness/hardness/spacing/flow/opacity,
pressure dynamics, modes, channels), eraser modes, clone from layer/time,
cache keys include visible strokes. paint.stroke/options/brushPreset/
setCloneSource/removeStroke/presets. Layer panel with paint tools, Paint
and Brushes panels.
Puppet: Puppet effect with meshes and Position/Advanced/Bend/Starch/Overlap
pins; alpha contour -> expansion (exact EDT) -> simplified outline ->
Delaunay with constraint recovery; ARAP (Igarashi 2005) two-step solve with
CG; anti-aliased texture-mapped rendering with overlap depth. puppet.addPin/
movePin/setPin/removePin/mesh/info. Puppet tools in the viewer with mesh
overlay and header options.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude
heojunfoandClaude Opus 5.5
bflatastic
Brandon ThomasandClaude Opus 5.5