Collision changed the collide slot's signature and grew four public structs, so
this is an ABI break and the soname moves to libakgl.so.0.8. The manual's counts
move with it: 195 functions across 23 headers, 183 of which return an error
context.
Target 12 -- "collision for 256 actors under 2 ms without the caller writing a
broad phase" -- is met. A new benchmark times the whole step with a world
attached, which is the number the target is actually about rather than a
narrowphase call in isolation: 15.4 us at 64 actors, and 54.1 us at 256 in a
purpose-built -DAKGL_MAX_HEAP_ACTOR=256 configuration. Over that 4x range the
step grew 3.5x while the all-pairs control grew 15.6x, which is the n-squared
the index exists to avoid. Plan item 7 is rewritten to record what shipped and
why both partitioners exist; the Construct and Phaser citations stay.
Three new TODO entries. Actor rotation, scoped to the five places it touches and
the one place it does not -- collision_support is written so rotating `dir` in
and the answer back is the whole narrowphase change, and rotational *response*
is explicitly a different piece of work. The swept narrowphase FLAG_BULLET
reserves, with the tunnelling arithmetic written out so a game can check its own
numbers against 1280 px/s. And the ccd arena being single-threaded and sized by
measurement at 7,264 bytes per GJK/EPA box pair.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KzBDV2fqgnUAcqCKqKvc71
The new chapter 15 covers the opt-in setup, where resolution runs in the step
and why it runs after the move, shapes and the z-extrusion trap, the asymmetric
masks and the defaults that matter more than the mechanism, tiles as a source
rather than proxies, the response hook and the three ways it is easy to write
wrongly, sensors, the four queries, both partitioners, and what is still not
implemented.
Collision falsified claims in eight other chapters. The physics chapter said
"There is no collision detection, at all" and that collide always raises
AKERR_API; actors had six behaviour hooks; the heap had five pools and four
non-claiming acquires; the status band held five codes; and the design
philosophy had exactly two pluggable subsystems. The appendix gains a
collision.h status section, the three new pool ceilings and a table of the
collision constants that are deliberately not in a public header.
Also fixes chapter labels the renumbering commit left pointing at their old
numbers -- "18. Utilities" linked to 19-utilities.md.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KzBDV2fqgnUAcqCKqKvc71
docs/ is a narrative manual, not a second reference. Every header already
carries a substantial @file/@brief block and Doxyfile sets WARN_IF_UNDOCUMENTED
with WARN_AS_ERROR, so an undocumented symbol already fails CI. The gap was
navigation and worked examples. Chapters teach a task and link to the Doxygen
output; where a declaration or a constant table has to be in front of the
reader it arrives as a `c excerpt=` block, so the text *is* the header and
cannot diverge from it. That also preserves the hand-aligned bit-flag tables
scripts/reindent.el goes out of its way not to destroy.
The manual does not re-document its dependencies. libakerror owns the
ATTEMPT/CLEANUP/PROCESS/HANDLE/FINISH protocol, SDL3 owns renderers and events,
Tiled owns the map format, jansson owns json_t. A chapter that restated any of
them would be wrong the day upstream changed and nothing here would notice --
the same drift this work exists to fix, arriving from a different direction. So
each chapter says what libakgl adds or constrains and links out for the rest.
Chapter 4 is the exception and the reason for it: libakerror documents the
mechanism, but only libakgl can say which statuses its own functions raise and
what they mean here, and that was written down nowhere. It carries three tables
-- libakgl's five status codes, the libakerror statuses libakgl actually raises
with their meaning in this library, and the exit-status trap where
`exit(AKGL_ERR_SDL)` is a wait status of 0 because the band starts at 256.
Every chapter was written against src/ rather than against the header comments,
which is how 27 false claims in those comments came to light. Where a chapter
documents a known defect rather than a design decision it says so and points at
TODO.md.
README.md keeps the development process and hands the reader to docs/. Its
task-oriented FAQ is deleted rather than moved, because one source of truth per
topic is the whole point and that FAQ's examples did not compile.
Census: 39 compiled snippets, 89 verbatim header excerpts, 4 JSON documents run
through the real loaders, one linked-and-executed program with its output
compared byte for byte, one generated figure. 11 norun blocks, each justified.
Co-Authored-By: Claude Code <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
