p_trail.c File Reference

#include "g_local.h"

Go to the source code of this file.

Macros
#define	TRAIL_LENGTH   8
#define	NEXT(n)   (((n) + 1) & (TRAIL_LENGTH - 1))
#define	PREV(n)   (((n) - 1) & (TRAIL_LENGTH - 1))

Functions
void	PlayerTrail_Init (void)
void	PlayerTrail_Add (vec3_t spot)
void	PlayerTrail_New (vec3_t spot)
edict_t *	PlayerTrail_PickFirst (edict_t *self)
edict_t *	PlayerTrail_PickNext (edict_t *self)
edict_t *	PlayerTrail_LastSpot (void)

Variables
edict_t *	trail [TRAIL_LENGTH]
int	trail_head
qboolean	trail_active = false

Macro Definition Documentation

NEXT

#define NEXT

(

n

)

(((n) + 1) & (TRAIL_LENGTH - 1))

Definition at line 45 of file p_trail.c.

PREV

#define PREV

(

n

)

(((n) - 1) & (TRAIL_LENGTH - 1))

Definition at line 46 of file p_trail.c.

TRAIL_LENGTH

#define TRAIL_LENGTH   8

Definition at line 39 of file p_trail.c.

Function Documentation

PlayerTrail_Add()

void PlayerTrail_Add

(

vec3_t

spot

)

Definition at line 67 of file p_trail.c.

{
    vec3_t  temp;
 
    if (!trail_active)
        return;
 
    VectorCopy (spot, trail[trail_head]->s.origin);
 
    trail[trail_head]->timestamp = level.time;
 
    VectorSubtract (spot, trail[PREV(trail_head)]->s.origin, temp);
    trail[trail_head]->s.angles[1] = vectoyaw (temp);
 
    trail_head = NEXT(trail_head);
}

Referenced by ClientBeginServerFrame(), and PlayerTrail_New().

PlayerTrail_Init()

void PlayerTrail_Init

(

void

)

Definition at line 49 of file p_trail.c.

{
    int     n;
 
    if (deathmatch->value /* FIXME || coop */)
        return;
 
    for (n = 0; n < TRAIL_LENGTH; n++)
    {
        trail[n] = G_Spawn();
        trail[n]->classname = "player_trail";
    }
 
    trail_head = 0;
    trail_active = true;
}

Referenced by PlayerTrail_New(), and SpawnEntities().

PlayerTrail_LastSpot()

edict_t* PlayerTrail_LastSpot

(

void

)

Definition at line 143 of file p_trail.c.

{
    return trail[PREV(trail_head)];
}

Referenced by ClientBeginServerFrame().

PlayerTrail_New()

void PlayerTrail_New

(

vec3_t

spot

)

Definition at line 85 of file p_trail.c.

{
    if (!trail_active)
        return;
 
    PlayerTrail_Init ();
    PlayerTrail_Add (spot);
}

PlayerTrail_PickFirst()

edict_t* PlayerTrail_PickFirst

(

edict_t *

self

)

Definition at line 95 of file p_trail.c.

{
    int     marker;
    int     n;
 
    if (!trail_active)
        return NULL;
 
    for (marker = trail_head, n = TRAIL_LENGTH; n; n--)
    {
        if(trail[marker]->timestamp <= self->monsterinfo.trail_time)
            marker = NEXT(marker);
        else
            break;
    }
 
    if (visible(self, trail[marker]))
    {
        return trail[marker];
    }
 
    if (visible(self, trail[PREV(marker)]))
    {
        return trail[PREV(marker)];
    }
 
    return trail[marker];
}

Referenced by ai_run().

PlayerTrail_PickNext()

edict_t* PlayerTrail_PickNext

(

edict_t *

self

)

Definition at line 124 of file p_trail.c.

{
    int     marker;
    int     n;
 
    if (!trail_active)
        return NULL;
 
    for (marker = trail_head, n = TRAIL_LENGTH; n; n--)
    {
        if(trail[marker]->timestamp <= self->monsterinfo.trail_time)
            marker = NEXT(marker);
        else
            break;
    }
 
    return trail[marker];
}

Referenced by ai_run().

Variable Documentation

trail

edict_t* trail[TRAIL_LENGTH]

Definition at line 41 of file p_trail.c.

Referenced by PlayerTrail_Add(), PlayerTrail_Init(), PlayerTrail_LastSpot(), PlayerTrail_PickFirst(), and PlayerTrail_PickNext().

trail_active

qboolean trail_active = false

Definition at line 43 of file p_trail.c.

Referenced by PlayerTrail_Add(), PlayerTrail_Init(), PlayerTrail_New(), PlayerTrail_PickFirst(), and PlayerTrail_PickNext().

trail_head

int trail_head

Definition at line 42 of file p_trail.c.

Referenced by PlayerTrail_Add(), PlayerTrail_Init(), PlayerTrail_LastSpot(), PlayerTrail_PickFirst(), and PlayerTrail_PickNext().