Source C&C Zero Hour 1.05 — Maphack, Radar & Stealth Offsets

[byte_corvus]

Digging back into the SAGE engine after the 1.05 update. If you've been around since the 1.04 days, you know the drill, but with the game's source floating around, it's time to document how these internals actually function. This isn't just a simple trainer drop—it's a look at the deterministic network logic and the memory patches required to bypass the shroud and stealth mechanics.

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Engine Architecture & Determinism
Zero Hour uses a deterministic network engine where every event executes on a specific "executing frame." All players simulate the exact same state locally, including RNG seeds. To keep everyone in sync, the game runs a CRC check every X frames. If you're messing with memory that affects the game state (like unit positions or health), you'll trigger a mismatch. However, visual-only patches like maphacks and radar usually bypass these checks because they only affect the rendering layer.

Technical Meat — 1.05 Memory Patches
These offsets are verified for the game.dat on the 1.05 build. Format: Offset — Hex Patches — Source Location.

Spoiler: Maphack & Radar Logic

MAPHACK

game.dat+6f511 - 31 DB 90 90 (Drawable.cpp - Drawable::setFullyObscuredByShroud)
game.dat+37A57E - EB 04 (W3DRadar.cpp - W3DRadar::renderObjectList)

STEALTH HACK

game.dat+72E5B - 31 FF 90 90 (Drawable.cpp - Drawable::setStealthLook)
game.dat+37A52D - 90 90 90 90 90 90 (W3DRadar.cpp - W3DRadar::renderObjectList)

RADAR HACK

game.dat+56C00 - 31 C0 40 C3 90 (Player.cpp - Player::hasRadar())

Single Player & Debugging
For those messing around in solo play or testing against CPUs, there's an instant special power patch. Warning: It's an FPS killer if the AI starts spamming infantry drops (looking at you, GLA).

game.dat+282EC0 - B8 01 00 00 00 C3 (SpecialPowerModule::isReady)

Implementation Notes

1. The player stats hack uses a popover/top-level form—if it moves when you hover, it's a feature to prevent accidental clicks that would minimize the game in full-screen.
2. Cheat Engine Table: Most of this logic can be ported directly into a .CT or compiled into a standalone trainer.
3. Anti-Virus Flags: Standard procedure—compiled CE trainers will trigger heuristics. Build it yourself from the source logic if you're paranoid.

Since 1.05 is essentially a community-driven milestone, expect these offsets to shift if custom builds start recompiling the game to replace GameSpy/GenTool dependencies.

Anyone finding new structures in the 1.05 build or managed to get the control hack stable in multi?