Footsteps in DarkPlaces tutorial - Quake

[page=Introduction]
One noticable thing about quake1 is that you cant hear any footsteps. The most of mods that use footstep-sounds have the same thumping sound no matter what type of ground you are walking on.
This tutor will add texture-based sounds :)

[page=The code]
Lets get down to buissnes.

player.qc
Add the following code before void player_run

void(entity e) walksound ={
	local float surfnum, r;
	local string s;

	makevectors(e.v_angle);

	surfnum = getsurfacenearpoint(world, e.origin - '0 0 24');
	if (surfnum >= 0)
	{
		s = getsurfacetexture(world, surfnum);
		if (s == "wizmet1_2")
		{
			bprint("play metal\n");
			r = rint(random() * 3);			
			if (r == 0)
				sound (e, CHAN_AUTO, "walk/metal1.wav", 0.5, ATTN_NORM);
			else if (r == 1)
				sound (e, CHAN_AUTO, "walk/metal2.wav", 0.5, ATTN_NORM);
			else if (r == 2)
				sound (e, CHAN_AUTO, "walk/metal3.wav", 0.5, ATTN_NORM);
			else
				sound (e, CHAN_AUTO, "walk/metal4.wav", 0.5, ATTN_NORM);
		}
		else
		{
			bprint("play generic\n");
			r = rint(random() * 4);			
			if (r == 0)
				sound (e, CHAN_AUTO, "walk/generic1.wav", 0.5, ATTN_NORM);
			else if (r == 1)
				sound (e, CHAN_AUTO, "walk/generic2.wav", 0.5, ATTN_NORM);
			else if (r == 2)
				sound (e, CHAN_AUTO, "walk/generic3.wav", 0.5, ATTN_NORM);
			else if (r == 3)
				sound (e, CHAN_AUTO, "walk/generic4.wav", 0.5, ATTN_NORM);
			else
				sound (e, CHAN_AUTO, "walk/generic5.wav", 0.5, ATTN_NORM);
		}
	}
};

in void player_run find

void()	player_run =[	$rockrun1,	player_run	]
{

and add the following code directly after it

if (self.walkframe == 1 || self.walkframe == 4 )
		if (checkbottom(self) == TRUE)
			if (self.waterlevel == 0)
				walksound (self);

world.qc
find

precache_sound ("misc/water1.wav");			// swimming
	precache_sound ("misc/water2.wav");			// swimming

and add after that

precache_sound ("walk/generic1.wav");      
	precache_sound ("walk/generic2.wav");      
	precache_sound ("walk/generic3.wav");      
	precache_sound ("walk/generic4.wav");
	precache_sound ("walk/generic5.wav");
	precache_sound ("walk/metal1.wav");      
	precache_sound ("walk/metal2.wav");      
	precache_sound ("walk/metal3.wav");      
	precache_sound ("walk/metal4.wav");      

defs.qc
in bottom of defs.qc add

//DP_QC_GETSURFACE
//idea: LordHavoc
//darkplaces implementation: LordHavoc
//builtin definitions:
float(entity e, float s) getsurfacenumpoints = #434;
vector(entity e, float s, float n) getsurfacepoint = #435;
vector(entity e, float s) getsurfacenormal = #436;
string(entity e, float s) getsurfacetexture = #437;
float(entity e, vector p) getsurfacenearpoint = #438;
vector(entity e, float s, vector p) getsurfaceclippedpoint = #439;
//description:
//functions to query surface information.

(or use dpmods own extensions qc file)

[page=How it works]
void walksound basicly checks what texture the player is standing on, and depending on the texture emits the apropriate sound.

For this to work you will need some sounds. You can make your own or use some sounds from another game. Rename them and place them in the apropriate directory to match:
* walk/generic1.wav
* walk/generic2.wav
* walk/generic2.wav
* walk/generic2.wav
* walk/generic2.wav
For generic footstep sounds, and ...
* walk/metal1.wav
* walk/metal2.wav
* walk/metal3.wav
* walk/metal4.wav
... for sounds of walking on metal surfaces.

You can use this function to do alot of stuff with some tweeking. I made texture-based ricoche sounds for a q1 cs mod :)

[page=Credits]
LordHavoc :: DarkPlaces engine and the extensions
Ze0 :: Footsteps Tutorial on Inside3D
MauveBib :: Mentioned the extention through irc
Me :: Experimenting and writing about it
---
Mail/msn: ego@babiestastegood.com