Quake Style - Quake 3 Tutorials - Newbie Tutorials

Quake Style - Quake 3 Tutorials
Newbie Tutorials - Grappling Hook
How to enable Zoid's grappling hook (the infamous "weapon 10") for Q3!

I was going over the source and noticed that Quake 3 already has a grappling hook programmed by our lovely friend Zoid! It's not offhand (as far as I know, only been looking at the source for an hour), but the models, icons, and effects are all in the Q3 PK3 file. As of now, the model is just gray - unskinned, and the beam effect and sound come from the lightning gun (hint hint....new ability for lightning gun?). I'll show you how to give the player starting weapons by using the grappling hook as an example.
First make sure you're using the game project, then open up g_client.c. Go to the void ClientSpawn(gentity_t *ent) function and find these lines:


	client->ps.stats[STAT_WEAPONS] = ( 1 << WP_MACHINEGUN );
	if ( g_gametype.integer == GT_TEAM ) {
		client->ps.ammo[WP_MACHINEGUN] = 50;
	} else {
		client->ps.ammo[WP_MACHINEGUN] = 100;
	}

These essentially assign the player's inventory to one machinegun and some bullets, depending on whether or not it's teamplay.

Now to give the player additional weapons you'll use something like this:


	client->ps.stats[STAT_WEAPONS] |= ( 1 << WP_GRAPPLING_HOOK );

Put the above line just under the ones having to do with the machinegun. Notice that I'm using |= instead of just = as done in the original code above for the machinegun. Since the machinegun is the FIRST weapon assigned, you can use the assignment operator, but additional weapons need to use the |= in order to add them to the inventory, without overwriting the first one. If you look a few lines down in the code you'll see that the gauntlet is added to the player's inventory in the same way as I showed you with the grappling hook above. The above line will let you give players any weapon at spawning, just by changing the WP_ enumeration.

Now open up g_items.c. Since we're going to be using some of the models and effects for the grappling hook, and no maps have the actual weapon, we need to precache it. We also need to precache the lightning gun so the grappling rope is also loaded. Find the void ClearRegisteredItems( void ) function and add these to the existing list of weapons to be registered:


	// Willi - Grappling Hook
	RegisterItem( BG_FindItemForWeapon( WP_LIGHTNING ) );
	RegisterItem( BG_FindItemForWeapon( WP_GRAPPLING_HOOK ) );

Here's the complete list of weapon names you can use in g_client.c:


WP_GAUNTLET
WP_LIGHTNING
WP_SHOTGUN
WP_MACHINEGUN
WP_GRENADE_LAUNCHER
WP_ROCKET_LAUNCHER
WP_PLASMAGUN
WP_RAILGUN
WP_BFG
WP_GRAPPLING_HOOK

I hope you enjoy and use the grappling hook, which is activated by pressing 0 (or if that doesn't work, try /weapon 10 at the console) and the assignment of weapons.

-- Credits:
   Tutorial by Willi
   Return to QS Tutorials

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