New effect: Deadly Bullets (#274)

gta-chaos-mod · Jan 26, 2024 · b94debd · b94debd
1 parent 20e5fc3
commit b94debd
Showing 1 changed file with 115 additions and 0 deletions.
diff --git a/src/gtasa/effects/custom/unsorted/DeadlyBulletsEffect.cpp b/src/gtasa/effects/custom/unsorted/DeadlyBulletsEffect.cpp
@@ -0,0 +1,115 @@
+#include "util/CPedDamageResponseCalculator.h"
+#include "util/EffectBase.h"
+#include "util/hooks/HookMacros.h"
+
+template <float dmgMult> class DeadlyBulletsEffect : public EffectBase
+{
+    bool isPlayerOnly = false;
+
+public:
+    DeadlyBulletsEffect (bool playerOnly) : isPlayerOnly (playerOnly) {}
+
+    void
+    OnStart (EffectInstance *inst) override
+    {
+        if (!isPlayerOnly)
+        {
+            HOOK_METHOD_ARGS (inst, Hooked_ComputeWillKillPed_everyone,
+                              void (CPedDamageResponseCalculator *, CPed *,
+                                    uint8_t *, char),
+                              0x4B5B27);
+
+            HOOK_METHOD_ARGS (inst, Hooked_VehicleInflictDamage_everyone,
+                              void (CVehicle *, CEntity *, eWeaponType, float,
+                                    CVector),
+                              0x6D7C90);
+        }
+        else
+        {
+            HOOK_METHOD_ARGS (inst, Hooked_ComputeWillKillPed_player,
+                              void (CPedDamageResponseCalculator *, CPed *,
+                                    uint8_t *, char),
+                              0x4B5B27);
+
+            HOOK_METHOD_ARGS (inst, Hooked_VehicleInflictDamage_player,
+                              void (CVehicle *, CEntity *, eWeaponType, float,
+                                    CVector),
+                              0x6D7C90);
+        }
+    }
+
+    static void
+    Hooked_VehicleInflictDamage_player (auto &&cb, CVehicle *self,
+                                        CEntity *damager, eWeaponType type,
+                                        float intensity, CVector coords)
+    {
+        cb ();
+
+        if (damager != FindPlayerPed ()) return;
+
+        if (!self || self->m_nPhysicalFlags.bBulletProof) return;
+
+        if (type >= WEAPON_PISTOL && type <= WEAPON_SNIPERRIFLE)
+        {
+            float mult = std::abs (dmgMult - 1.0f);
+            self->m_fHealth -= (intensity * mult);
+        }
+    }
+
+    static void
+    Hooked_VehicleInflictDamage_everyone (auto &&cb, CVehicle *self,
+                                          CEntity *damager, eWeaponType type,
+                                          float intensity, CVector coords)
+    {
+        cb ();
+
+        if (!self || self->m_nPhysicalFlags.bBulletProof) return;
+
+        if (type >= WEAPON_PISTOL && type <= WEAPON_SNIPERRIFLE)
+        {
+            float mult = std::abs (dmgMult - 1.0f);
+            self->m_fHealth -= (intensity * mult);
+        }
+    }
+
+    static void
+    Hooked_ComputeWillKillPed_player (auto                        &&cb,
+                                      CPedDamageResponseCalculator *thisCalc,
+                                      CPed *ped, uint8_t *cDamageResponseInfo,
+                                      char a4)
+    {
+        if (thisCalc->m_pDamager != FindPlayerPed ()) return;
+
+        if (thisCalc->m_weaponType >= WEAPON_PISTOL
+            && thisCalc->m_weaponType <= WEAPON_SNIPERRIFLE)
+        {
+            thisCalc->m_fDamageFactor *= dmgMult;
+        }
+
+        cb ();
+    }
+
+    static void
+    Hooked_ComputeWillKillPed_everyone (auto                        &&cb,
+                                        CPedDamageResponseCalculator *thisCalc,
+                                        CPed *ped, uint8_t *cDamageResponseInfo,
+                                        char a4)
+    {
+        if (thisCalc->m_weaponType >= WEAPON_PISTOL
+            && thisCalc->m_weaponType <= WEAPON_SNIPERRIFLE)
+        {
+            thisCalc->m_fDamageFactor *= dmgMult;
+        }
+
+        cb ();
+    }
+};
+
+using DeadlyBulletsEffectQuad = DeadlyBulletsEffect<4.0f>;
+
+/* clang-format off */
+DEFINE_EFFECT (DeadlyBulletsEffectQuad, "effect_deadly_bullets_quad_dmg_everyone",
+               GROUP_WEAPONS, false);
+DEFINE_EFFECT (DeadlyBulletsEffectQuad, "effect_deadly_bullets_quad_dmg_player",
+               GROUP_WEAPONS, true);
+/* clang-format on */