With a Puppet tool, a click off the pins picked the topmost layer under
the pointer by its own bounds, and selected it. So a click where the
deformation had stretched the mesh past the layer's bounds went to the
layer behind (selecting it and giving it a Puppet effect), and any
click on another layer switched to it.
While selected layers have a Puppet effect, a click (or a press that
might start a pin marquee) now works only on them, as in After
Effects: on the layer whose mesh, as deformed now, is under the
pointer (the pin lands on the deformed shape), else the one whose own
art is (a new mesh); elsewhere nothing happens and the selection
stays. Without a rigged layer selected, the tools pick and rig the
layer under the pointer as before.
`puppet::contains` tests a point against a deformed mesh; `puppet.addPin`
uses it too (its own test only held for one triangle winding).
Test: puppet_pins_go_on_the_deformed_mesh_and_the_tool_stays_on_the_rigged_layer
(ui_viewer).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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