/*
===============
CG_AddTrails
===============
*/
void CG_AddTrails(void) {
trailJunc_t *j, *jNext;
if (!initTrails) {
CG_ClearTrails();
}
VectorCopy(cg.refdef_current->viewaxis[0], vforward);
VectorCopy(cg.refdef_current->viewaxis[1], vright);
VectorCopy(cg.refdef_current->viewaxis[2], vup);
// update the settings for each junc
j = activeTrails;
while (j) {
float lifeFrac = (float)(cg.time - j->spawnTime) / (float)(j->endTime - j->spawnTime);
if (lifeFrac >= 1.0) {
j->inuse = qfalse; // flag it as dead
j->width = j->widthEnd;
j->alpha = j->alphaEnd;
if (j->alpha > 1.0) {
j->alpha = 1.0;
} else if (j->alpha < 0.0) {
j->alpha = 0.0;
}
VectorCopy(j->colorEnd, j->color);
} else {
j->width = j->widthStart + (j->widthEnd - j->widthStart) * lifeFrac;
j->alpha = j->alphaStart + (j->alphaEnd - j->alphaStart) * lifeFrac;
if (j->alpha > 1.0) {
j->alpha = 1.0;
} else if (j->alpha < 0.0) {
j->alpha = 0.0;
}
VectorSubtract(j->colorEnd, j->colorStart, j->color);
VectorMA(j->colorStart, lifeFrac, j->color, j->color);
}
j = j->nextGlobal;
}
// draw the trailHeads
j = headTrails;
while (j) {
jNext = j->nextHead; // in case it gets removed
if (!j->inuse) {
CG_FreeTrailJunc(j);
} else {
CG_AddTrailToScene(j, 0, 0);
}
j = jNext;
}
}
/*
===========
CG_KillTrail
===========
*/
void CG_KillTrail(trailJunc_t *t)
{
trailJunc_t *next;
next = t->nextJunc;
// kill the trail here
t->nextJunc = NULL;
if(next)
{
CG_FreeTrailJunc(next);
}
}
/*
===========
CG_KillTrail
===========
*/
void CG_KillTrail(trailJunc_t *t) {
trailJunc_t *next;
if (!t->inuse && t->freed) {
return;
}
next = t->nextJunc;
if (next < &trailJuncs[0] || next >= &trailJuncs[MAX_TRAILJUNCS]) {
next = NULL;
}
t->nextJunc = NULL;
if (next) {
if (next->nextJunc && next->nextJunc == t) {
next->nextJunc = NULL;
}
CG_FreeTrailJunc(next);
}
}