SpeedrunHelper: basic derandomizer

Author: InfiniteC0re

SDK/BYSpeedrunHelper/Source/ABYSpeedrunHelper.cpp

@@ -75,18 +75,46 @@ MEMBER_HOOK( 0x006be7b0, T2Locale, T2Locale_GetString, const TWCHAR*, TINT a_iNu
 	return CallOriginal( a_iNumString );
 }
 
+// TBOOL g_bSpoofRandom = TFALSE;
+// 
+// MEMBER_HOOK( 0x006b5850, Toshi::TRandom, TRandom_Isaac, void )
+// {
+// 	if ( g_bSpoofRandom )
+// 	{
+// 		m_uiRndCnt = RANDSIZ - 1;
+// 
+// 		for (TINT i = 0; i < RANDSIZ; i++)
+// 		{
+// 			m_pRandrsl[ i ] = 0;
+// 		}
+// 	}
+// 	else CallOriginal();
+// }
+// 
+// MEMBER_HOOK( 0x00429b00, AGameStateController, AGameStateController_InsertGameState, void, AGameState* a_pGameState )
+// {
+// 	CallOriginal( a_pGameState );
+// 
+// 	if ( g_bIsFunCategory )
+// 	{
+// 		auto pARandom = *(TCHAR**)( 0x0077de10 );
+// 		auto pTRandom = (TRandom_Isaac::_hook_obj*)( pARandom + 4 );
+// 
+// 		g_bSpoofRandom = a_pGameState->GetClass()->IsA( (TClass*)0x007833b8 ); // Spoof if ACookingMiniGame
+// 
+// 		pTRandom->_hook_func(); // Call TRandom_Isaac hook
+// 	}
+// }
+
+HOOK( 0x004010d0, UNK_GetRandomFloat, TFLOAT, Toshi::TRandom*, TFLOAT a_flUpper )
+{
+	// Always drop items instead of coins when kicking destructible objects
+	return 0.0f;
+}
+
 void NewGameStarted()
 {
 	AUIManager::GetSingleton()->GetTimer().Start();
-
-	if ( g_bIsFunCategory )
-	{
-		auto pARandom = *(TCHAR**)( 0x0077de10 );
-		auto pTRandom = (TRandom*)(pARandom + 4);
-
-		// Reset random seed
-		pTRandom->SetSeed( 999999 );
-	}
 }
 
 void AGUI2_MainPostRenderCallback()
@@ -273,6 +301,11 @@ class ABYSpeedrunHelper : public AModInstance
 					ABikeRaceMicroGame::ms_aVariants[ i ].iNumLaps = 1;
 				}
 
+				// Derandomizer
+				//InstallHook<TRandom_Isaac>();
+				//InstallHook<AGameStateController_InsertGameState>();
+				InstallHook<UNK_GetRandomFloat>();
+
 				// Don't waste stamina in main game
 				InstallHook<APlayerSimProfile_Update>();
 

Toshi/Source/Math/TRandom.h

@@ -36,14 +36,14 @@ class TRandom
 	void    SetSeed( TUINT a_uiSeed );
 	TUINT32 GetSeed() const { return m_uiSeed; }
 
-private:
+protected:
 	void Isaac();
 	void RandInit();
 
-private:
+protected:
 	TUINT32 m_uiSeed;              // 0x0
 	TUINT32 m_uiRndCnt;            // 0x4
-	TUINT32 m_pRandrsl[ RANDSIZ ]; //0x8
+	TUINT32 m_pRandrsl[ RANDSIZ ]; // 0x8
 
 	TUINT32 m_pRandmem[ RANDSIZ ]; // 0x48