[ccoventry]

Release note: none

R&D proof for #849 (restyled HUD), not for merging as is. Part of #849.

What it does

• engine.rs swaps one more cldll_func_t slot: 3, HUD_Redraw (checked against F's table: client+0x2a5b0, exported as HUD_Redraw). The trampoline calls the client's own, then restyled_hud::after_redraw().
• restyled_hud.rs: with ds_debug_restyled_health 1, draws the health as a TF2-like plus in the bottom-left corner in the engine's 2D pass, with plain untextured GL quads from opengl32.dll (state pushed/popped). Filled from the bottom by the health left (cream > 50, amber > 25, red), with the number in seven-segment quads standing in for a real font.
  • POV/live: CHudDodIcons::m_iHealth (element+0x14, found by walking gHUD's element list for the vftable).
  • HLTV in-eye: the per-player health the HLTV message keeps (client+0xe913c + player*0x30, After a seek in an HLTV demo, a player who is already scoped in shows no zoom #830).
• Pair with the stock cl_hud_health 0, which hides DoD's own health block.
• Name added to Commands.txt, docs/dodstudio_commands.md and the regenerated console_commands_data.js.

The write-up (every HUD element's primitives, what data exists in POV vs HLTV, options a/b/c, recommendation) is on #849.

Tests

• cargo test -p goldsrc-hooks: 667 passed (4 new for the geometry helpers).

• clippy (1.98.1) host and i686-pc-windows-msvc: clean. command_suggest.test.js: 15 passed.

• In game, game_probe.py, ktps8w2-element_over_railyard_h2 at 150 s (POV): PRE and POST, see the screenshots on [R&D] A restyled HUD for movies: how far can we move, resize and redraw DoD's HUD (a TF2-style look, for example) #849.

• Re-run after merging dev (In-game commands get shorter names grouped by what they change: ds_hud_hide_scoreboard and so on (#555) #719), PRE and POST, DLL rebuilt into local\test-849\: same demo at 150 s, ds_debug_restyled_health 1 draws the plus with "100" bottom left, 0 removes it. Reports: local\game-probe\882-ds-pre\, 882-ds-post\ (cmp.png). After the merge: hook tests (691), workspace tests, clippy (both targets), fmt and npm run test:unit pass. The name is listed in console_prefix's NEW_SINCE_555.

Decisions

• ds_debug_ name: it's an R&D switch, not a setting (after In-game commands get shorter names grouped by what they change: ds_hud_hide_scoreboard and so on (#555) #719, ds_debug_restyled_health, as the Rename the in-game commands: area as the second word (spec_, hud_, world_...), and a shorter prefix #555 table lists it).
• Seven-segment digits instead of a vgui2 font: enough to judge the look; the real version should use deathmsg/font.rs's surface path.
• Not done: hiding only part of the stock block, a layout file, other elements.

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[ccoventry]

Merged dev in (after #719) at b1277402.

• The cvar is now ds_debug_restyled_health, the name the Rename the in-game commands: area as the second word (spec_, hud_, world_...), and a shorter prefix #555 table gives it. The code's suffix already matched; I updated its doc comment. I re-added its rows to dev's Commands.txt (DEBUG) and docs/dodstudio_commands.md, and regenerated console_commands_data.js. It never shipped, so it gets no old_names.rs entry. It is listed in console_prefix's NEW_SINCE_555.
• Local checks: fmt, clippy 1.98.1 (workspace and i686), hook tests (691), workspace tests, npm run test:unit: all pass.
• Test DLL rebuilt: local\test-849\dodstudio_goldsrc_hooks.dll.
• game_probe re-run on ktps8w2-element_over_railyard_h2 at 150 s, on PRE and POST. At 1 the plus with "100" shows bottom left; at 0 it is gone. Both PASS (local\game-probe\882-ds-pre\cmp.png, 882-ds-post\cmp.png).
• If While a demo loads, the demo player bar shows how far along it is (#465) #758 or R&D: ds_debug_log_gun_lowered, POV vs HLTV gun lowering timelines (#704) #707 merges first, this PR's NEW_SINCE_555 line will conflict with theirs. Keep both names in the list.

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