Car Generator Randomizer: Initial Implementation

Author: Parik27

src/vehicles/cargens.cc

@@ -0,0 +1,92 @@
+#include <rage.hh>
+#include <Utils.hh>
+#include <CStreaming.hh>
+
+#include <common/minhook.hh>
+#include <common/logger.hh>
+#include <common/config.hh>
+
+#include <common/common.hh>
+
+class CCarGen;
+
+class CarGeneratorRandomizer
+{
+
+    RB_C_CONFIG_START
+    {
+        bool        Enable            = true;
+        bool        ForceOnRandomGens = false;
+        std::string Vehicle           = "";
+    }
+    RB_C_CONFIG_END
+
+    /*******************************************************/
+    static uint32_t
+    GetRandomVehicleModel (uint32_t orig)
+    {
+        if (orig == 0 && !Config ().ForceOnRandomGens)
+            return orig;
+
+        if (Config ().Vehicle.size ())
+            return rage::atStringHash (Config ().Vehicle);
+
+        return GetRandomElement (Rainbomizer::Common::GetVehicleHashes ());
+    }
+
+    /*******************************************************/
+    template <auto &CCarGen__Init>
+    static void
+    RandomizeCarGenerator (CCarGen *p1, float x, float y, float z, float rotX,
+                           float rotY, float rotZ, uint32_t modelHash,
+                           int32_t colPrim, int32_t colSec, int32_t colTert,
+                           int32_t colQuat, int32_t col5, int32_t col6,
+                           uint32_t flags, uint32_t p14, uint64_t p15,
+                           uint64_t p16, uint64_t p17, uint32_t *vehicleGroup,
+                           uint64_t p19, uint64_t p20, uint64_t p21,
+                           uint64_t p22)
+    {
+#ifdef LOG_CREATED_GENERATORS
+        Rainbomizer::Logger::LogMessage (
+            "CCarGen(%p %f %f %f %f %f %f %x %x "
+            "%x %x %x %x %x %x %x %x %x %x %x %x %x %x %x)",
+            p1, x, y, z, rotX, rotY, rotZ, modelHash, colPrim, colSec, colTert,
+            colQuat, col5, col6, flags, p14, p15, p16, p17, *vehicleGroup, p19,
+            p20, p21, p22);
+#endif
+
+        if (Config().Enable)
+            {
+                *vehicleGroup = 0;
+        
+                // Remove flags that make it spawn ambulance/firetruck/police car
+                flags &= (~(0b11001100));
+
+                // 0 to get the engine to randomize them (still need a way to
+                // control the randomness).
+                
+                // If you set the model hash directly here, the randomness
+                // doesn't work as intended. (I'm guessing some sort of conflict
+                // or bounds checks by the game)
+                modelHash = 0;
+            }
+
+        return CCarGen__Init (p1, x, y, z, rotX, rotY, rotZ, modelHash, colPrim,
+                              colSec, colTert, colQuat, col5, col6, flags, p14, p15, p16,
+                              p17, vehicleGroup, p19, p20, p21, p22);
+    }
+
+public:
+    /*******************************************************/
+    CarGeneratorRandomizer ()
+    {
+        RB_C_DO_CONFIG ("CarGeneratorRandomizer", Enable, Vehicle, ForceOnRandomGens);
+
+        REGISTER_HOOK ("f3 0f 11 7c ? ? f3 0f 11 74 ? ? e8 ? ? ? ? ? 01 25 ? ? "
+                       "? ? ? 84 f6 74 ?",
+                       12, RandomizeCarGenerator, void, CCarGen *, float, float,
+                       float, float, float, float, uint32_t, int32_t, int32_t,
+                       int32_t, int32_t, int32_t, int32_t, uint32_t, uint32_t, uint64_t, uint64_t, uint64_t,
+                       uint32_t *, uint64_t, uint64_t, uint64_t, uint64_t);
+    }
+} g_CarGeneratorRandomizer;