New effect: Concrete Peds

src/gtasa/effects/custom/ped/ConcretePedsEffect.cpp

@@ -0,0 +1,51 @@
+#include "util/EffectBase.h"
+#include "util/hooks/HookMacros.h"
+
+class ConcretePedsEffect : public EffectBase
+{
+private:
+    static inline std::array<float, 5> zFactor
+        = {0.2f, 0.15f, 0.25f, 0.15f, 0.3f};
+    static inline unsigned int idx = 0;
+
+public:
+    void
+    OnStart (EffectInstance *inst) override
+    {
+        HOOK_METHOD_ARGS (inst, Hooked_CPed_KillPedWithCar,
+                          void (CPed *, CVehicle *, float, bool), 0x54C5CC,
+                          0x54C642, 0x60461F, 0x60491B, 0x604A0D);
+        idx = 0;
+    }
+
+    static void
+    Hooked_CPed_KillPedWithCar (auto &&cb, CPed *thisPed, CVehicle *car,
+                                float arg1, bool arg2)
+    {
+        if (car && (thisPed != FindPlayerPed ()))
+        {
+            auto diff = car->GetPosition () - thisPed->GetPosition ();
+            diff.Normalise ();
+
+            float pushFactor = 0.25f;
+            if (CModelInfo::IsVehicleModelType (car->m_nModelIndex)
+                != VEHICLE_AUTOMOBILE)
+            {
+                pushFactor *= 0.5f;
+            }
+
+            car->m_vecMoveSpeed.x
+                = std::clamp (diff.x, -pushFactor, pushFactor);
+            car->m_vecMoveSpeed.y
+                = std::clamp (diff.y, -pushFactor, pushFactor);
+            car->m_vecMoveSpeed.z = zFactor[idx++ % zFactor.size ()];
+
+            return;
+        }
+
+        cb ();
+    }
+};
+
+DEFINE_EFFECT (ConcretePedsEffect, "effect_concrete_peds",
+               GROUP_GRAVITY | GROUP_HANDLING);