[fh1599]

Summary

This PR contains two matching decompilation improvements for RSPE01_01.

• Matches RPGrpModelScene::DrawPrepare(...).
• Adds the RPGrpModelScene members required by the matched implementation.
• Adjusts RPUtlRandom::getF32() so Bowling::RPBowManagerContext::UpdateNpcs() reaches a full project-report match without changing the helper's behavior.

The existing UpdateNpcs() implementation is prior work by Alex9303 from #149. My contribution there is limited to resolving the remaining code-generation mismatch through the shared random helper.

Verification

Built and verified with RSPE01_01.

• Full build completes successfully.
• build/RSPE01_01/main.dol: OK.
• RPGrpModelScene::DrawPrepare(...): project report 100%; 80/80 .text bytes identical.
• Bowling::RPBowManagerContext::UpdateNpcs(): project report 100%; 440/440 .text bytes and 110/110 instructions identical.
• The shared getF32() change was checked against the full project progress report and produced no regressions in previously matched functions.
• The final progress report is identical to the verified Tier 2 final snapshot.

A stricter relocation-aware objdiff comparison may display approximately 99.91% for UpdateNpcs() because of two data-relocation label differences. The generated .text is byte-identical, and the project's normal progress-report configuration reports the function at 100%.

AI disclosure

I used OpenAI Codex through Merlin Software's provided environment to assist with code inspection, hypothesis generation, and controlled matching experiments.

I reviewed the source changes and independently verified the results using the project's build, progress-report, and binary-comparison tooling. AI-assisted work was limited to Pack game code; no SDK code was modified.

[decomp-dev]

Report for RSPE01_01 (27fa94a - 358f1d5)

📈 Matched code: 35.04% (+0.01%, +520 bytes)

✅ 2 new matches

Unit	Item	Bytes	Before	After
main/Pack/RPGraphics/RPGrpModelScene	RPGrpModelScene::DrawPrepare(const RPGrpCamera*, const RPGrpScreen*)	+80	0.00%	100.00%
main/Pack/RPSports/RPBowScene/RPBowManagerContext	Bowling::RPBowManagerContext::UpdateNpcs()	+1	99.77%	100.00%

📈 2 improvements in unmatched items

Unit	Item	Bytes	Before	After
main/Pack/RPSports/RPBowScene/RPBowBackgroundNpcManager	Bowling::RPBowBackgroundNpcManager::UpdateMovement(nw4r::math::VEC3*, bool*)	+20	96.55%	97.81%
main/Pack/RPKernel/RPSysKokeshi	RPSysKokeshi::LoadResource(const RPSysKokeshiOverloadInfo*)	+1	99.42%	99.55%