SNIPPET :: Weapon HUD

[-=*Raz0r*=-]

Here's some code I'm somewhat proud of - still needs some work, customise it how you want.

OLD

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#define DRAW_PIC( x, y, w, h, shader, colour )	\
{												\
	trap_R_SetColor( colour );					\
		CG_DrawPic( x, y, w, h, shader );		\
	trap_R_SetColor( NULL );					\
}

static void DrawWeapons( void )
{
	int		weaponsAllowed		= cg.predictedPlayerState.stats[STAT_WEAPONS];	//	Which weapons are we given?
	int		weaponsAvailable	= 0;											//	Which of these do we have ammo for?
	int		currentWeapon		= cg.weaponSelect;								//	Which weapon do we have currently selected
	int		i					= 0;											//	iterate
	float	y					= 96.0f;										//	y co-ordinate of current weapon icon
	float	wpX[WP_NUM_WEAPONS];
	float	wpY[WP_NUM_WEAPONS];
	vec4_t	colour				= { 1.0f, 1.0f, 1.0f, 1.0f };					//	Colour of the icons (Greyscaling and whatnot)

	//Set the coordinates
	for ( i=1; i<WP_NUM_WEAPONS; i++ )
	{
		if ( weaponsAllowed & ( 1 << i ) )
		{
			wpY[i]	= y;
			y		+= ICON_SIZE-12.0f;
			wpX[i]	= (i==currentWeapon) ? 32.0f : 24.0f ;
		}
	}

#if 0
	//TODO: Find out which weapons we have ammo for (So we can highlight them)
	for ( i=1; i<WP_NUM_WEAPONS; i++ )
	{
		if ( ( weaponsAllowed & ( 1 << i ) ) && cg.predictedPlayerState.ammo[i] )
			weaponsAvailable |= ( 1 << i );
	}
#else
	//Every weapon we own
	for ( i=1; i<WP_NUM_WEAPONS; i++ )
	{
		if ( weaponsAllowed & ( 1 << i ) )
			weaponsAvailable |= ( 1 << i );
	}
#endif
	//Every weapon we have ammo for (highlight them)
	for ( i=1; i<WP_NUM_WEAPONS; i++ )
	{
		if ( weaponsAvailable & ( 1 << i ) )
		{
			if ( i == currentWeapon )
				CG_DrawPic( wpX[i], wpY[i], ICON_SIZE, ICON_SIZE, cgs.media.weaponIcons[i] );
			else
			{
				MAKERGB( colour, 0.75f, 0.75f, 0.75f );
				DRAW_PIC( wpX[i], wpY[i], ICON_SIZE, ICON_SIZE, cgs.media.weaponIcons_NA[i], colour );
			}
		}
	}
}

Updated

#define DRAW_PIC( x, y, w, h, shader, colour )	\
{												\
	trap_R_SetColor( colour );					\
		CG_DrawPic( x, y, w, h, shader );		\
	trap_R_SetColor( NULL );					\
}

static void DrawWeapons( void )
{
	int		weaponsAllowed		= cg.predictedPlayerState.stats[STAT_WEAPONS];	//	Bit-mask of the weapons are we given
	int		currentWeapon		= cg.weaponSelect;								//	Which weapon do we currently have selected?
	int		i					= 0;											//	iterate
	float	y					= 96.0f;										//	y co-ordinate of current weapon icon (iterated)
	float	wpX[WP_NUM_WEAPONS];												//	Store the x coordinate of each weapon icon
	float	wpY[WP_NUM_WEAPONS];												//	Store the y coordinate of each weapon icon
	vec4_t	colour				= { 1.0f, 1.0f, 1.0f, 1.0f };					//	Colour of the icons (Greyscaling and whatnot)

	
	for ( i=1; i<=LAST_USEABLE_WEAPON; i++ )
	{//Set the coordinates (Preparation)
		if ( weaponsAllowed & ( 1 << i ) )
		{//Only get weapons we actually own
			wpY[i]	= y;
			y		+= ICON_SIZE-12.0f;

			if ( i == currentWeapon )
			{//The weapon we have selected shall be nudged to the right
				wpX[i]	= 36.0f;
			}
			else if ( !am_weaponData[i].ammoPerShot || cg.predictedPlayerState.ammo[am_weaponData[i].ammoIndex] )
			{//This weapon doesn't use ammo, or we have ammo. Regular position.
				wpX[i]	= 24.0f;
			}
			else
			{//We can't use this weapon. Nudge it to the left.
				//wpX[i]	= 8.0f;
				wpX[i]	= 24.0f;
			}
		}
	}

	for ( i=1; i<=LAST_USEABLE_WEAPON; i++ )
	{//Render the valid weapons' icons
		if ( weaponsAllowed & ( 1 << i ) )
		{
			if ( i == currentWeapon )
			{//The weapon we have selected shall be highlighted
				CG_DrawPic( wpX[i], wpY[i], ICON_SIZE, ICON_SIZE, cgs.media.weaponIcons[i] );
			}
			else if ( !am_weaponData[i].ammoPerShot || cg.predictedPlayerState.ammo[am_weaponData[i].ammoIndex] )
			{//This weapon either doesn't use ammo, or we have ammo for it. It's valid.
				MAKERGB( colour, 0.5f, 0.5f, 0.5f );
				DRAW_PIC( wpX[i], wpY[i], ICON_SIZE, ICON_SIZE, cgs.media.weaponIcons[i], colour );
			}
			else
			{//We don't have ammo for this weapon, it's invalid. We can't select this, so dim it.
				MAKERGBA( colour, 0.2f, 0.2f, 0.2f, 0.75f );
				DRAW_PIC( wpX[i], wpY[i], ICON_SIZE, ICON_SIZE, cgs.media.weaponIcons_NA[i], colour );
			}
		}
	}
}

You'll have to adapt the ammo and weaponData part for your own mod (Mine is altered from baseJKA)

-Notes-
It could probably do with some static memory, but I didn't want to mess too much with that.
It should be called from CG_Draw2D (My HUD code is totally restructured, so I can't really say where the most suitable place is)