Low ammo warning

cl_dll/CMakeLists.txt

@@ -12,6 +12,7 @@ add_sources(
 	cdll_int.cpp
 	cl_dll.h
 	cl_util.h
+	cl_weapons.h
 	color_tags.cpp
 	color_tags.h
 	com_weapons.cpp

cl_dll/ammo.cpp

@@ -28,6 +28,7 @@
 
 #include "ammohistory.h"
 #include "vgui_TeamFortressViewport.h"
+#include "cl_weapons.h"
 
 WEAPON *gpActiveSel;	// NULL means off, 1 means just the menu bar, otherwise
 						// this points to the active weapon menu item
@@ -265,6 +266,8 @@ DECLARE_COMMAND(m_Ammo, PrevWeapon);
 
 int CHudAmmo::Init(void)
 {
+	m_iCurrentWeapon = -1;
+	m_iCurrentClipAmmo = -1;
 	gHUD.AddHudElem(this);
 
 	HOOK_MESSAGE(CurWeapon);
@@ -575,6 +578,8 @@ int CHudAmmo::MsgFunc_CurWeapon(const char *pszName, int iSize, void *pbuf )
 	int iId = READ_CHAR();
 	int iClip = READ_CHAR();
 
+	m_iCurrentWeapon = iId;
+
 	// detect if we're also on target
 	if ( iState > 1 )
 	{
@@ -635,10 +640,51 @@ int CHudAmmo::MsgFunc_CurWeapon(const char *pszName, int iSize, void *pbuf )
 
 	m_fFade = 200.0f; //!!!
 	m_iFlags |= HUD_ACTIVE;
+	m_iCurrentClipAmmo = iClip;
 
 	return 1;
 }
 
+void CHudAmmo::Warning()
+{
+	static bool ammoWarningPlayed = false;
+	int ammoCount = m_iCurrentClipAmmo;
+
+	if (m_iCurrentWeapon == WEAPON_CROWBAR || m_iCurrentWeapon == WEAPON_PIPEWRENCH || m_iCurrentWeapon == WEAPON_KNIFE || m_iCurrentWeapon == WEAPON_GRAPPLE || m_iCurrentWeapon == WEAPON_RPG || m_iCurrentWeapon == WEAPON_SATCHEL || m_iCurrentWeapon == WEAPON_SHOCKRIFLE || m_iCurrentWeapon == WEAPON_HORNETGUN)
+		lowAmmoThreshold = -1;
+	else if (m_iCurrentWeapon == WEAPON_GLOCK)
+		lowAmmoThreshold = 3;
+	else if (m_iCurrentWeapon == WEAPON_EAGLE)
+		lowAmmoThreshold = 2;
+	else if (m_iCurrentWeapon == WEAPON_PYTHON)
+		lowAmmoThreshold = 1;
+	else if (m_iCurrentWeapon == WEAPON_MP5)
+		lowAmmoThreshold = 10;
+	else if (m_iCurrentWeapon == WEAPON_SHOTGUN)
+		lowAmmoThreshold = 2; // give space for a double shot on warning.
+	else if (m_iCurrentWeapon == WEAPON_CROSSBOW)
+		lowAmmoThreshold = 1;
+	else if (m_iCurrentWeapon == WEAPON_GAUSS || m_iCurrentWeapon == WEAPON_EGON)
+		lowAmmoThreshold = 40;
+	else if (m_iCurrentWeapon == WEAPON_DISPLACER)
+		lowAmmoThreshold = 60;
+	else if (m_iCurrentWeapon == WEAPON_HANDGRENADE || m_iCurrentWeapon == WEAPON_TRIPMINE || m_iCurrentWeapon == WEAPON_SPORELAUNCHER || m_iCurrentWeapon == WEAPON_SNARK || m_iCurrentWeapon == WEAPON_PENGUIN)
+		lowAmmoThreshold = 1; // most boobie traps.
+	else if (m_iCurrentWeapon == WEAPON_M249)
+		lowAmmoThreshold = 15;
+	else if (m_iCurrentWeapon == WEAPON_SNIPERRIFLE)
+		lowAmmoThreshold = 1;
+
+	if (ammoCount > lowAmmoThreshold)
+		ammoWarningPlayed = false;
+	else if (!ammoWarningPlayed)
+	{
+		PlaySound("common/warning.wav", 1.0);
+		ammoWarningPlayed = true;
+	}
+}
+
+
 //
 // WeaponList -- Tells the hud about a new weapon type.
 //
@@ -893,7 +939,21 @@ int CHudAmmo::Draw(float flTime)
 	if (m_fFade > 0)
 		m_fFade -= (gHUD.m_flTimeDelta * 20);
 
-	UnpackRGB(r,g,b, gHUD.m_iDefaultHUDColor);
+	UnpackRGB(r, g, b, RGB_DEFAULT);
+	if (m_iCurrentClipAmmo > lowAmmoThreshold)
+	{
+		UnpackRGB(r, g, b, gHUD.m_iDefaultHUDColor);
+		if (Blinking)
+			Blinking = false;
+	}
+	else
+	{
+		Blinking = true;
+		a = (int)(fabs(sin(flTime * 6)) * 256.0); // flash
+		r = 250;
+		g = 0;
+		b = 0;
+	}
 
 	ScaleColors(r, g, b, a );
 
@@ -986,6 +1046,8 @@ int CHudAmmo::Draw(float flTime)
 			SPR_DrawAdditive(0, x, y - iOffset, &m_pWeapon->rcAmmo2);
 		}
 	}
+
+	Warning();
 	return 1;
 }
 

cl_dll/cl_weapons.h

@@ -0,0 +1,38 @@
+/****
+*
+* Copyright © 2021-2024 The Phoenix Project Software. Some Rights Reserved.
+*
+* AURA
+*
+* cl_weapons.h - a shortcut to define the IDs of weapons clientside.
+*
+*
+****/
+
+#define WEAPON_NONE				0
+#define WEAPON_CROWBAR			1
+#define	WEAPON_GLOCK			2
+#define WEAPON_PYTHON			3
+#define WEAPON_MP5				4
+#define WEAPON_CHAINGUN			5
+#define WEAPON_CROSSBOW			6
+#define WEAPON_SHOTGUN			7
+#define WEAPON_RPG				8
+#define WEAPON_GAUSS			9
+#define WEAPON_EGON				10
+#define WEAPON_HORNETGUN		11
+#define WEAPON_HANDGRENADE		12
+#define WEAPON_TRIPMINE			13
+#define	WEAPON_SATCHEL			14
+#define	WEAPON_SNARK			15
+#define WEAPON_GRAPPLE			16
+#define WEAPON_EAGLE			17
+#define WEAPON_PIPEWRENCH		18
+#define WEAPON_M249				19
+#define WEAPON_DISPLACER		20
+#define WEAPON_SHOCKRIFLE		22
+#define WEAPON_SPORELAUNCHER	23
+#define WEAPON_SNIPERRIFLE		24
+#define WEAPON_KNIFE			25
+#define WEAPON_PENGUIN			26
+#define WEAPON_ONE 27

cl_dll/health.cpp

@@ -26,6 +26,7 @@
 #include "cl_util.h"
 #include "parsemsg.h"
 #include <string.h>
+#include <cmath>
 
 
 DECLARE_MESSAGE(m_Health, Health )
@@ -178,6 +179,18 @@ int CHudHealth::Draw(float flTime)
 
 	if ( !m_hSprite )
 		m_hSprite = LoadSprite(PAIN_NAME);
+
+	if (m_iHealth > 25)
+	{
+		UnpackRGB(r, g, b, gHUD.m_iDefaultHUDColor);
+		if (Blinking)
+			Blinking = false;
+	}
+	else
+	{
+		Blinking = true;
+		a = (int)(fabs(sin(gHUD.m_flTime * 10)) * 256.0); // flash
+	}
 
 	// Has health changed? Flash the health #
 	if (m_fFade)
@@ -196,10 +209,6 @@ int CHudHealth::Draw(float flTime)
 	}
 	else
 		a = MIN_ALPHA;
-
-	// If health is getting low, make it bright red
-	if (m_iHealth <= 15)
-		a = 255;
 
 	GetPainColor( r, g, b );
 	ScaleColors(r, g, b, a );
@@ -227,7 +236,18 @@ int CHudHealth::Draw(float flTime)
 		int iHeight = gHUD.m_iFontHeight;
 		int iWidth = HealthWidth/10;
 
-		UnpackRGB(r, g, b, gHUD.m_iDefaultHUDColor);
+		if (m_iHealth > 25)
+		{
+			UnpackRGB(r, g, b, gHUD.m_iDefaultHUDColor);
+			if (Blinking)
+				Blinking = false;
+		}
+		else
+		{
+			Blinking = true;
+			a = (int)(fabs(sin(gHUD.m_flTime * 10)) * 256.0); // flash
+		}
+
 		FillRGBA(x, y, iWidth, iHeight, r, g, b, a);
 	}
 

cl_dll/health.h

@@ -111,6 +111,7 @@ class CHudHealth: public CHudBase
 	int m_HUD_dmg_bio;
 	int m_HUD_cross;
 	float m_fAttackFront, m_fAttackRear, m_fAttackLeft, m_fAttackRight;
+	bool Blinking;
 	void GetPainColor( int &r, int &g, int &b );
 	float m_fFade;
 

cl_dll/hud.h

@@ -121,10 +121,15 @@ struct HUDLIST {
 class CHudAmmo: public CHudBase
 {
 public:
+	bool Blinking;
+	int lowAmmoThreshold; // the amount of ammo at which the warning sound will play.
+	int m_iCurrentWeapon;
+	int m_iCurrentClipAmmo;
 	int Init( void );
 	int VidInit( void );
 	int Draw(float flTime);
 	void Think(void);
+	void Warning(void);
 	void Reset(void);
 	int DrawWList(float flTime);
 	int MsgFunc_CurWeapon(const char *pszName, int iSize, void *pbuf);