Add new function isPlayerCrosshairVisible (#3720)

Author: FileEX

Client/game_sa/CHudSA.cpp

@@ -11,6 +11,10 @@
 
 #include "StdInc.h"
 #include "CHudSA.h"
+#include "CGameSA.h"
+#include "CCameraSA.h"
+
+extern CGameSA* pGame;
 
 char szVehicleName[50] = {'\0'};
 char szZoneName[50] = {'\0'};
@@ -171,3 +175,38 @@ void CHudSA::ResetComponentAdjustment()
     MemPut<float>(m_pfCameraCrosshairScale, 192.0f);
     m_fSniperCrosshairScale = 210.0f;
 }
+
+bool CHudSA::IsCrosshairVisible()
+{
+    if (!IsComponentVisible(HUD_CROSSHAIR))
+        return false;
+
+    CCamera* camera = pGame->GetCamera();
+    eCamMode cameraViewMode = static_cast<eCamMode>(camera->GetCam(camera->GetActiveCam())->GetMode());
+
+    switch (cameraViewMode)
+    {
+        case MODE_SNIPER_RUNABOUT:
+        case MODE_ROCKETLAUNCHER_RUNABOUT:
+        case MODE_ROCKETLAUNCHER_RUNABOUT_HS:
+        case MODE_M16_1STPERSON_RUNABOUT:
+        case MODE_1STPERSON_RUNABOUT:
+        case MODE_AIMWEAPON:
+        case MODE_AIMWEAPON_ATTACHED:
+        case MODE_AIMWEAPON_FROMCAR:
+        case MODE_M16_1STPERSON:
+        case MODE_HELICANNON_1STPERSON:
+        case MODE_SNIPER:
+        case MODE_ROCKETLAUNCHER:
+        case MODE_ROCKETLAUNCHER_HS:
+        case MODE_AIMING:
+        case MODE_CAMERA:
+            return true;
+        default:
+            break;
+    }
+
+    // Check CTheScripts::bDrawCrossHair
+    std::uint8_t crossHairType = *reinterpret_cast<std::uint8_t*>(VAR_CTheScripts_bDrawCrossHair);
+    return crossHairType > 0;
+}

Client/game_sa/CHudSA.h

@@ -38,6 +38,8 @@
 
 #define CODE_ShowMoney              0x58F47D
 
+#define VAR_CTheScripts_bDrawCrossHair 0xA44490
+
 struct SHudComponent
 {
     bool          bIsPartOfAll;
@@ -59,6 +61,7 @@ class CHudSA : public CHud
     bool IsComponentVisible(eHudComponent component);
     void AdjustComponents(float fAspectRatio);
     void ResetComponentAdjustment();
+    bool IsCrosshairVisible();
 
 protected:
     void InitComponentList();

Client/mods/deathmatch/logic/luadefs/CLuaPlayerDefs.cpp

@@ -29,6 +29,7 @@ void CLuaPlayerDefs::LoadFunctions()
         {"getPlayerMoney", GetPlayerMoney},
         {"getPlayerWantedLevel", GetPlayerWantedLevel},
         {"getPlayerScriptDebugLevel", ArgumentParser<GetPlayerScriptDebugLevel>},
+        {"isPlayerCrosshairVisible", ArgumentParser<IsPlayerCrosshairVisible>},
 
         // Player set funcs
         {"showPlayerHudComponent", ShowPlayerHudComponent},
@@ -91,13 +92,15 @@ void CLuaPlayerDefs::AddClass(lua_State* luaVM)
     lua_classfunction(luaVM, "getScriptDebugLevel", "getPlayerScriptDebugLevel");
 
     lua_classfunction(luaVM, "isNametagShowing", "isPlayerNametagShowing");
+    lua_classfunction(luaVM, "isCrosshairVisible", "isPlayerCrosshairVisible");
 
     lua_classvariable(luaVM, "ping", NULL, "getPlayerPing");
     lua_classvariable(luaVM, "name", NULL, "getPlayerName");
     lua_classvariable(luaVM, "team", NULL, "getPlayerTeam");
     lua_classvariable(luaVM, "scriptDebugLevel", nullptr, "getPlayerScriptDebugLevel");
     lua_classvariable(luaVM, "nametagText", "setPlayerNametagText", "getPlayerNametagText");
     lua_classvariable(luaVM, "nametagShowing", "setPlayerNametagShowing", "isPlayerNametagShowing");
+    lua_classvariable(luaVM, "crosshairVisible", nullptr, "isPlayerCrosshairVisible");
 
     lua_registerclass(luaVM, "Player", "Ped");
 }
@@ -636,3 +639,8 @@ unsigned char CLuaPlayerDefs::GetPlayerMapOpacity()
     int iMapOpacity = g_pCore->GetCVars()->GetValue<int>("mapalpha");
     return static_cast<unsigned char>(Clamp(0, iMapOpacity, 255));
 }
+
+bool CLuaPlayerDefs::IsPlayerCrosshairVisible()
+{
+    return g_pGame->GetHud()->IsCrosshairVisible();
+}

Client/mods/deathmatch/logic/luadefs/CLuaPlayerDefs.h

@@ -30,6 +30,7 @@ class CLuaPlayerDefs : public CLuaDefs
     LUA_DECLARE(GetPlayerMoney);
     LUA_DECLARE(GetPlayerWantedLevel);
     static std::uint8_t GetPlayerScriptDebugLevel() noexcept;
+    static bool         IsPlayerCrosshairVisible();
 
     // Player set
     LUA_DECLARE(ShowPlayerHudComponent);

Client/sdk/game/CHud.h

@@ -41,4 +41,5 @@ class CHud
     virtual bool IsComponentVisible(eHudComponent component) = 0;
     virtual void AdjustComponents(float fAspectRatio) = 0;
     virtual void ResetComponentAdjustment() = 0;
+    virtual bool IsCrosshairVisible() = 0;
 };