port Random_GetControl

LostArtefacts · Nov 16, 2023 · 45f78c9 · 45f78c9
1 parent ebd4306
commit 45f78c9
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Showing 8 changed files with 22 additions and 13 deletions.
diff --git a/docs/progress.svg b/docs/progress.svg
diff --git a/docs/progress.txt b/docs/progress.txt
@@ -2708,7 +2708,7 @@ typedef enum GAME_OBJECT_ID {
 0044C670    00000006    *R      int32_t __cdecl LevelCompleteSequence(void);
 0044C680    000001C2    -R      int32_t __cdecl LevelStats(int32_t levelID);
 0044C850    00000113    -R      int32_t __cdecl GameStats(int32_t levelID);
-0044C970    0000001E    *       int32_t __cdecl Random_GetControl(void);
+0044C970    0000001E    +       int32_t __cdecl Random_GetControl(void);
 0044C990    0000000A    +       void __cdecl Random_SeedControl(int32_t seed);
 0044C9A0    0000001E    -       int32_t __cdecl Random_GetDraw(void);
 0044C9C0    0000000A    +       void __cdecl Random_SeedDraw(int32_t seed);
@@ -2952,7 +2952,7 @@ typedef enum GAME_OBJECT_ID {
 004662E0    -       int8_t g_TextASCIIMap[];
 00466480    -       double g_GameSizer = 1.0;
 00466488    -       double g_GameSizerCopy = 1.0;
-00466BB0    -       int32_t g_RandControl;
+00466BB0    +       int32_t g_RandControl;
 00466BB4    -       int32_t g_RandDraw;
 00466F70    -       struct CONTROL_LAYOUT g_Layout[2];
 00467DD0    +       const int32_t g_AtanBaseTable[8];

diff --git a/src/game/camera.c b/src/game/camera.c
@@ -5,6 +5,7 @@
 #include "game/matrix.h"
 #include "game/music.h"
 #include "game/output.h"
+#include "game/random.h"
 #include "global/const.h"
 #include "global/funcs.h"
 #include "global/vars.h"

diff --git a/src/game/random.c b/src/game/random.c
@@ -5,16 +5,24 @@
 
 #include <time.h>
 
+static int32_t m_RandControl = 0xD371F947;
+
 void __cdecl Random_SeedControl(const int32_t seed)
 {
-    g_RandControl = seed;
+    m_RandControl = seed;
 }
 
 void __cdecl Random_SeedDraw(const int32_t seed)
 {
     g_RandDraw = seed;
 }
 
+int32_t __cdecl Random_GetControl(void)
+{
+    m_RandControl = 0x41C64E6D * m_RandControl + 12345;
+    return (m_RandControl >> 10) & 0x7FFF;
+}
+
 void __cdecl Random_Seed(void)
 {
     time_t lt = time(0);

diff --git a/src/game/random.h b/src/game/random.h
@@ -4,4 +4,5 @@
 
 void __cdecl Random_SeedControl(int32_t seed);
 void __cdecl Random_SeedDraw(int32_t seed);
+int32_t __cdecl Random_GetControl(void);
 void __cdecl Random_Seed(void);
diff --git a/src/global/funcs.h b/src/global/funcs.h
@@ -662,7 +662,6 @@
 #define LevelCompleteSequence ((int32_t __cdecl (*)(void))0x0044C670)
 #define LevelStats ((int32_t __cdecl (*)(int32_t levelID))0x0044C680)
 #define GameStats ((int32_t __cdecl (*)(int32_t levelID))0x0044C850)
-#define Random_GetControl ((int32_t __cdecl (*)(void))0x0044C970)
 #define Random_GetDraw ((int32_t __cdecl (*)(void))0x0044C9A0)
 #define GetValidLevelsList ((void __cdecl (*)(REQUEST_INFO *req))0x0044C9D0)
 #define GetSavedGamesList ((void __cdecl (*)(REQUEST_INFO *req))0x0044CA20)

diff --git a/src/global/vars.h b/src/global/vars.h
@@ -22,7 +22,6 @@
 #define g_TextASCIIMap (*(int8_t(*)[])0x004662E0)
 #define g_GameSizer (*(double*)0x00466480) // = 1.0
 #define g_GameSizerCopy (*(double*)0x00466488) // = 1.0
-#define g_RandControl (*(int32_t*)0x00466BB0)
 #define g_RandDraw (*(int32_t*)0x00466BB4)
 #define g_Layout (*(struct CONTROL_LAYOUT(*)[2])0x00466F70)
 #define g_MidSort (*(int32_t*)0x0046C300) // = 0

diff --git a/src/inject_exec.c b/src/inject_exec.c
@@ -231,6 +231,7 @@ static void Inject_Sound(void)
 
 static void Inject_Random(void)
 {
+    INJECT(1, 0x0044C970, Random_GetControl);
     INJECT(1, 0x0044C990, Random_SeedControl);
     INJECT(1, 0x0044C9C0, Random_SeedDraw);
     INJECT(1, 0x0044D870, Random_Seed);