From d6af4d293979fe09b5f79a3020e42cba511bf66c Mon Sep 17 00:00:00 2001
From: FEDERICOMB <41979395+FEDERICOMB96@users.noreply.github.com>
Date: Thu, 2 Sep 2021 12:55:40 -0300
Subject: [PATCH] Add a new natives `rg_spawn_head_gib` and
 `rg_spawn_random_gibs` (#200)

* Add a new natives rg_spawn_head_gib and rg_spawn_random_gibs

Add a new natives rg_spawn_head_gib and rg_spawn_random_gibs.
rg_spawn_head_gib when called it will spawn a head gib.
rg_spawn_random_gibs when called it will spawn random gibs.

* Minor fix

* remove CAmxArgs

* newline fix in reapi_gamedll.inc

Co-authored-by: Sergey Shorokhov <wopox1337@ya.ru>
---
 .../scripting/include/reapi_gamedll.inc       | 20 ++++++
 reapi/include/cssdk/dlls/regamedll_api.h      |  2 +
 reapi/src/natives/natives_misc.cpp            | 63 +++++++++++++++++++
 3 files changed, 85 insertions(+)

diff --git a/reapi/extra/amxmodx/scripting/include/reapi_gamedll.inc b/reapi/extra/amxmodx/scripting/include/reapi_gamedll.inc
index 6248283..f6a581d 100644
--- a/reapi/extra/amxmodx/scripting/include/reapi_gamedll.inc
+++ b/reapi/extra/amxmodx/scripting/include/reapi_gamedll.inc
@@ -934,3 +934,23 @@ native rg_set_can_hear_player(const listener, const sender, const bool:can_hear)
 * @return boolean
 */
 native bool:rg_get_can_hear_player(const listener, const sender);
+
+/*
+* Spawn a head gib
+*
+* @param index                 Entity id
+*
+* @return                      Index of head gib entity or AMX_NULLENT (-1) otherwise
+*/
+native rg_spawn_head_gib(const index);
+
+/*
+* Spawn random gibs
+*
+* @param index                 Entity id
+* @param cGibs                 Count gibs
+* @param bHuman                Set gibs of a human or alien
+*
+* @noreturn
+*/
+native rg_spawn_random_gibs(const index, const cGibs, const bool:bHuman = true);
diff --git a/reapi/include/cssdk/dlls/regamedll_api.h b/reapi/include/cssdk/dlls/regamedll_api.h
index 541b918..53a6d66 100644
--- a/reapi/include/cssdk/dlls/regamedll_api.h
+++ b/reapi/include/cssdk/dlls/regamedll_api.h
@@ -669,6 +669,8 @@ struct ReGameFuncs_t {
 	int (*Cmd_Argc)();
 	const char *(*Cmd_Argv)(int i);
 	class CGrenade *(*PlantBomb)(entvars_t *pevOwner, Vector &vecStart, Vector &vecVelocity);
+	class CGib *(*SpawnHeadGib)(entvars_t *pevVictim);
+	void (*SpawnRandomGibs)(entvars_t *pevVictim, int cGibs, int human);
 };
 
 class IReGameApi {
diff --git a/reapi/src/natives/natives_misc.cpp b/reapi/src/natives/natives_misc.cpp
index a626a22..2961081 100644
--- a/reapi/src/natives/natives_misc.cpp
+++ b/reapi/src/natives/natives_misc.cpp
@@ -2366,6 +2366,66 @@ cell AMX_NATIVE_CALL rg_get_can_hear_player(AMX* amx, cell* params)
 	return CSGameRules()->m_VoiceGameMgr.m_pHelper->GetCanHearPlayer(pListener, pSender);
 }
 
+/*
+* Spawn a head gib
+*
+* @param index                 Entity id
+*
+* @return                      Index of head gib entity or AMX_NULLENT (-1) otherwise
+*
+* native rg_spawn_head_gib(const index);
+*/
+cell AMX_NATIVE_CALL rg_spawn_head_gib(AMX* amx, cell* params)
+{
+	enum args_e { arg_count, arg_index };
+
+	CHECK_ISENTITY(arg_index);
+
+	CBaseEntity *pEntity = getPrivate<CBaseEntity>(params[arg_index]);
+	if (unlikely(pEntity == nullptr)) {
+		AMXX_LogError(amx, AMX_ERR_NATIVE, "%s: invalid or uninitialized entity", __FUNCTION__);
+		return FALSE;
+	}
+
+	entvars_t *pevEntity = pEntity->pev;
+	CGib *pHeadGib = g_ReGameFuncs->SpawnHeadGib(pevEntity);
+
+	// Sanity check anyway
+	if (pHeadGib)
+		return indexOfPDataAmx(pHeadGib);
+
+	return AMX_NULLENT;
+}
+
+/*
+* Spawn random gibs
+*
+* @param index                 Entity id
+* @param cGibs                 Count gibs
+* @param bHuman                Set gibs of a human or alien
+*
+* @noreturn
+*
+* native rg_spawn_random_gibs(const index, const cGibs, const bool:bHuman = true);
+*/
+cell AMX_NATIVE_CALL rg_spawn_random_gibs(AMX* amx, cell* params)
+{
+	enum args_e { arg_count, arg_index, arg_gibs, arg_human };
+
+	CHECK_ISENTITY(arg_index);
+
+	CBaseEntity *pEntity = getPrivate<CBaseEntity>(params[arg_index]);
+	if (unlikely(pEntity == nullptr)) {
+		AMXX_LogError(amx, AMX_ERR_NATIVE, "%s: invalid or uninitialized entity", __FUNCTION__);
+		return FALSE;
+	}
+
+	entvars_t *pevEntity = pEntity->pev;
+
+	g_ReGameFuncs->SpawnRandomGibs(pevEntity, params[arg_gibs], params[arg_human]);
+	return TRUE;
+}
+
 AMX_NATIVE_INFO Misc_Natives_RG[] =
 {
 	{ "rg_set_animation",             rg_set_animation             },
@@ -2456,6 +2516,9 @@ AMX_NATIVE_INFO Misc_Natives_RG[] =
 	{ "rg_set_can_hear_player",       rg_set_can_hear_player       },
 	{ "rg_get_can_hear_player",       rg_get_can_hear_player       },
 
+	{ "rg_spawn_head_gib",            rg_spawn_head_gib            },
+	{ "rg_spawn_random_gibs",         rg_spawn_random_gibs         },
+
 	{ nullptr, nullptr }
 };