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 = qfalse

Macro Definition Documentation

NEXT

#define NEXT

(

n

)

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

Definition at line 43 of file p_trail.c.

PREV

#define PREV

(

n

)

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

Definition at line 44 of file p_trail.c.

TRAIL_LENGTH

#define TRAIL_LENGTH   8

Definition at line 37 of file p_trail.c.

Function Documentation

PlayerTrail_Add()

void PlayerTrail_Add

(

vec3_t

spot

)

Definition at line 64 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 47 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 = qtrue;
}

Referenced by PlayerTrail_New(), and SpawnEntities().

PlayerTrail_LastSpot()

edict_t* PlayerTrail_LastSpot

(

void

)

Definition at line 136 of file p_trail.c.

{
    return trail[PREV(trail_head)];
}

Referenced by ClientBeginServerFrame().

PlayerTrail_New()

void PlayerTrail_New

(

vec3_t

spot

)

Definition at line 82 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 92 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 118 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 39 of file p_trail.c.

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

trail_active

qboolean trail_active = qfalse

Definition at line 41 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 40 of file p_trail.c.

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