Initial work on capturing of Pokemon

src/Battling/Library/CaptureLibrary.cpp

@@ -0,0 +1,41 @@
+#include "CaptureLibrary.hpp"
+#include "../PkmnItemUseScript.hpp"
+#include "../PkmnScriptHook.hpp"
+
+namespace PkmnLib::Battling {
+    CaptureLibrary::CaptureResult CaptureLibrary::TryCatch(Pokemon* pokemon, Library::Item* catchItem,
+                                                           ArbUt::Random* random) const {
+        auto hpMax = pokemon->GetMaxHealth();
+        auto hpCurrent = pokemon->GetCurrentHealth();
+        auto rate = pokemon->GetSpecies()->GetCaptureRate();
+
+        u8 bonusBall = 1;
+        auto* itemScript =
+            dynamic_cast<PkmnItemUseScript*>(pokemon->GetLibrary()->GetScriptResolver()->LoadItemScript(catchItem));
+        itemScript->ModifyPokeballCatchBonus(pokemon, &bonusBall);
+
+        u8 bonusStatus = 1;
+        PKMN_HOOK(ModifyCaptureRateBonus, pokemon, pokemon, catchItem, &bonusStatus);
+
+        auto modifiedCatchRate = (((3.0 * hpMax) - (2.0 * hpCurrent)) * rate * bonusBall) / (3.0 * hpMax);
+        modifiedCatchRate *= bonusStatus;
+
+        auto shakeProbability = 65536 / pow((255.0 / modifiedCatchRate), 0.1875);
+
+        u8 shakes = 0;
+        if (modifiedCatchRate >= 255) {
+            shakes = 4;
+        }
+
+        // FIXME: Implement critical capture
+
+        for (; shakes < 4; shakes++) {
+            auto randomNumber = random->GetUnsigned(65536);
+            if (randomNumber >= shakeProbability) {
+                break;
+            }
+        }
+        auto success = shakes == 4;
+        return CaptureResult{.WasCaught = success, .Shakes = shakes, .WasCritical = false};
+    }
+}

src/Battling/Library/CaptureLibrary.hpp

@@ -0,0 +1,20 @@
+#ifndef PKMNLIB_CAPTURELIBRARY_HPP
+#define PKMNLIB_CAPTURELIBRARY_HPP
+
+#include <CreatureLib/Defines.hpp>
+#include "../Pokemon/Pokemon.hpp"
+namespace PkmnLib::Battling {
+    class CaptureLibrary {
+    public:
+        struct CaptureResult {
+            bool WasCaught;
+            u8 Shakes;
+            bool WasCritical;
+        };
+
+        CaptureResult TryCatch(Pokemon* pokemon, Library::Item* catchItem, ArbUt::Random* random) const;
+    };
+}
+
+
+#endif // PKMNLIB_CAPTURELIBRARY_HPP

src/Battling/PkmnItemUseScript.hpp

@@ -0,0 +1,16 @@
+#ifndef PKMNLIB_PKMNITEMUSESCRIPT_HPP
+#define PKMNLIB_PKMNITEMUSESCRIPT_HPP
+
+#include <CreatureLib/Battling/ScriptHandling/ItemUseScript.hpp>
+namespace PkmnLib::Battling {
+    class Pokemon;
+
+    class PkmnItemUseScript : public CreatureLib::Battling::ItemUseScript {
+    public:
+        virtual void ModifyPokeballCatchBonus(Pokemon* pokemon, u8* catchBonus) const {
+            (void)pokemon;
+            (void)catchBonus;
+        }
+    };
+}
+#endif // PKMNLIB_PKMNITEMUSESCRIPT_HPP

src/Battling/PkmnScript.hpp

@@ -36,6 +36,8 @@ namespace PkmnLib::Battling {
                                               CreatureLib::Battling::Creature* target, u8 hitIndex, float* modifier){};
         virtual void ModifyDefensiveStatValue(CreatureLib::Battling::ExecutingAttack* attack,
                                               CreatureLib::Battling::Creature* target, u8 hitIndex, float* modifier){};
+        virtual void ModifyCaptureRateBonus(CreatureLib::Battling::Creature* pokemon,
+                                            CreatureLib::Library::Item* catchItem, u8* modifier){};
     };
 }
 

src/ScriptResolving/AngelScript/AngelScriptItemUseScript.cpp

@@ -71,9 +71,8 @@ void AngelScriptItemUseScript::OnUse(CreatureLib::Battling::Battle* battle) cons
     }
     AngelScriptUtils::AngelscriptFunctionCall(
         __OnUse.Function, _resolver->GetContextPool(), _scriptObject, _resolver, ""_cnc,
-        [&]([[maybe_unused]] asIScriptContext* ctx) {
-            ctx->SetArgObject(0, battle);
-        }, [&]([[maybe_unused]] asIScriptContext* ctx) {});
+        [&]([[maybe_unused]] asIScriptContext* ctx) { ctx->SetArgObject(0, battle); },
+        [&]([[maybe_unused]] asIScriptContext* ctx) {});
 }
 void AngelScriptItemUseScript::OnCreatureUse(CreatureLib::Battling::Creature* creature, bool isBattle) const {
     if (!__OnPokemonUse.Exists) {
@@ -87,3 +86,15 @@ void AngelScriptItemUseScript::OnCreatureUse(CreatureLib::Battling::Creature* cr
         },
         [&]([[maybe_unused]] asIScriptContext* ctx) {});
 }
+void AngelScriptItemUseScript::ModifyPokeballCatchBonus(PkmnLib::Battling::Pokemon* pokemon, u8* catchBonus) const {
+    if (!__ModifyPokeballCatchBonus.Exists) {
+        return;
+    }
+    AngelScriptUtils::AngelscriptFunctionCall(
+        __ModifyPokeballCatchBonus.Function, _resolver->GetContextPool(), _scriptObject, _resolver, ""_cnc,
+        [&]([[maybe_unused]] asIScriptContext* ctx) {
+            ctx->SetArgObject(0, (void*)pokemon);
+            ctx->SetArgAddress(1, catchBonus);
+        },
+        [&]([[maybe_unused]] asIScriptContext* ctx) {});
+}

src/ScriptResolving/AngelScript/AngelScriptItemUseScript.hpp

@@ -3,11 +3,12 @@
 
 #include <CreatureLib/Battling/ScriptHandling/ItemUseScript.hpp>
 #include <scriptarray/scriptarray.h>
+#include "../../Battling/PkmnItemUseScript.hpp"
 #include "TypeRegistry/NativeArray.hpp"
 
 class AngelScriptResolver;
 
-class AngelScriptItemUseScript final : public CreatureLib::Battling::ItemUseScript {
+class AngelScriptItemUseScript final : public PkmnLib::Battling::PkmnItemUseScript {
 public:
     AngelScriptItemUseScript(asIScriptObject* scriptObject, AngelScriptResolver* resolver)
         : _scriptObject(scriptObject), _resolver(resolver) {}
@@ -27,6 +28,7 @@ public:
 
     void OnUse(CreatureLib::Battling::Battle* battle) const override;
     void OnCreatureUse(CreatureLib::Battling::Creature* creature, bool isBattle) const override;
+    void ModifyPokeballCatchBonus(PkmnLib::Battling::Pokemon* pokemon, u8* catchBonus) const override;
 
 private:
     asIScriptObject* _scriptObject;
@@ -50,13 +52,16 @@ private:
 
 #define ITEM_USE_SCRIPT_HOOK_FUNCTION(name, decl) FunctionInfo __##name = Initialize(decl);
 
-    ITEM_USE_SCRIPT_HOOK_FUNCTION(OnInitialize, "void OnInitialize(const BattleLibrary@ library, const narray<EffectParameter@>@ parameters)");
+    ITEM_USE_SCRIPT_HOOK_FUNCTION(
+        OnInitialize, "void OnInitialize(const BattleLibrary@ library, const narray<EffectParameter@>@ parameters)");
     ITEM_USE_SCRIPT_HOOK_FUNCTION(IsItemUsable, "bool IsItemUsable()");
     ITEM_USE_SCRIPT_HOOK_FUNCTION(IsPokemonUseItem, "bool IsPokemonUseItem()");
     ITEM_USE_SCRIPT_HOOK_FUNCTION(IsUseValidForPokemon, "bool IsUseValidForPokemon(Pokemon@ target)");
     ITEM_USE_SCRIPT_HOOK_FUNCTION(IsHoldable, "bool IsHoldable()");
     ITEM_USE_SCRIPT_HOOK_FUNCTION(OnUse, "void OnUse()");
     ITEM_USE_SCRIPT_HOOK_FUNCTION(OnPokemonUse, "void OnPokemonUse(Pokemon@ target)");
+    ITEM_USE_SCRIPT_HOOK_FUNCTION(ModifyPokeballCatchBonus,
+                                  "void ModifyPokeballCatchBonus(Pokemon@ target, uint8& catchBonus)");
 };
 
 #endif // PKMNLIB_ANGELSCRIPTITEMUSESCRIPT_HPP

src/ScriptResolving/AngelScript/AngelScriptResolver.cpp

@@ -193,7 +193,7 @@ CreatureLib::Battling::BattleScript* AngelScriptResolver::LoadScript(const ArbUt
     return new AngelScriptScript(owner, ownerType, this, t.value(), obj, _contextPool);
 }
 
-CreatureLib::Battling::ItemUseScript* AngelScriptResolver::LoadItemScript(const CreatureLib::Library::Item* item) {
+PkmnLib::Battling::PkmnItemUseScript* AngelScriptResolver::LoadItemScript(const CreatureLib::Library::Item* item) {
     auto v = this->_itemUseScripts.TryGet(item);
     if (v.has_value()) {
         return v.value();

src/ScriptResolving/AngelScript/AngelScriptResolver.hpp

@@ -69,7 +69,7 @@ public:
     CreatureLib::Battling::BattleScript* LoadScript(const ArbUt::OptionalBorrowedPtr<void>& owner,
                                                     ScriptCategory category,
                                                     const ArbUt::StringView& scriptName) override;
-    CreatureLib::Battling::ItemUseScript* LoadItemScript(const CreatureLib::Library::Item* item) override;
+    PkmnLib::Battling::PkmnItemUseScript* LoadItemScript(const CreatureLib::Library::Item* item) override;
 
     ArbUt::OptionalBorrowedPtr<const PkmnLib::Battling::EvolutionScript>
     LoadEvolutionScript(const ArbUt::StringView& view) override;

src/ScriptResolving/AngelScript/AngelScriptScript.cpp

@@ -463,3 +463,11 @@ void AngelScriptScript::ChangeSpeed(CreatureLib::Battling::BaseTurnChoice* choic
         ctx->SetArgAddress(1, (void*)speed);
     });
 }
+void AngelScriptScript::ModifyCaptureRateBonus(CreatureLib::Battling::Creature* pokemon,
+                                               CreatureLib::Library::Item* catchItem, u8* modifier) {
+    CALL_HOOK(ModifyCaptureRateBonus, {
+        ctx->SetArgObject(0, (void*)pokemon);
+        ctx->SetArgObject(1, (void*)catchItem);
+        ctx->SetArgAddress(2, (void*)modifier);
+    });
+}

src/ScriptResolving/AngelScript/AngelScriptScript.hpp

@@ -163,6 +163,8 @@ public:
                                   CreatureLib::Battling::Creature* target, u8 hitIndex, float* modifier) override;
     void ModifyDefensiveStatValue(CreatureLib::Battling::ExecutingAttack* attack,
                                   CreatureLib::Battling::Creature* target, u8 hitIndex, float* modifier) override;
+    void ModifyCaptureRateBonus(CreatureLib::Battling::Creature* pokemon, CreatureLib::Library::Item* catchItem,
+                                u8* modifier) override;
 };
 
 #undef CALL_HOOK

src/ScriptResolving/AngelScript/AngelScriptTypeInfo.hpp

@@ -206,6 +206,8 @@ public:
         ModifyDefensiveStatValue,
         "void ModifyDefensiveStatValue(ExecutingMove@ attack, Pokemon@ target, uint8 hit, float& defensiveStatValue)");
     SCRIPT_HOOK_FUNCTION(OnAfterHeldItemConsume, "void OnAfterHeldItemConsume(Pokemon@ target, const Item@ item)");
+    SCRIPT_HOOK_FUNCTION(ModifyCaptureRateBonus,
+                         "void ModifyCaptureRateBonus(Pokemon@ target, const Item@ item, uint8& bonus)");
 };
 
 #undef SCRIPT_HOOK_FUNCTION

src/ScriptResolving/AngelScript/TypeRegistry/BasicScriptClass.cpp

@@ -89,6 +89,7 @@ shared abstract class ItemUseScript {
 
     void OnUse(Battle@ battle) { };
     void OnPokemonUse(Pokemon@ target, bool isBattle) { };
+    void ModifyPokeballCatchBonus(Pokemon@ target, uint8& catchBonus){};
 }
 )");
     Ensure(r >= 0);