/**
* Called from TagProcess, NextTaggedActor() is
* called repeatedly until the caller gets fed up or
* there are no more tagged actors to look at.
*/
int NextTaggedActor(int previous) {
PMOVER pMover;
// Convert actor number to index
if (!previous)
previous = -1;
else
previous = TaggedActorIndex(previous);
while (++previous < numTaggedActors) {
pMover = GetMover(taggedActors[previous].id);
// No tag on lead actor while he's moving
if ((taggedActors[previous].id) == GetLeadId() && MoverMoving(pMover)) {
taggedActors[previous].tagFlags &= ~(POINTING | TAGWANTED);
continue;
}
// Not if the actor doesn't exist at the moment
if (pMover && !MoverIs(pMover))
continue;
if (!(pMover ? MoverHidden(pMover) : ActorHidden(taggedActors[previous].id))) {
return taggedActors[previous].id;
}
}
return 0;
}
/**
* See if the actor on whom the camera is is approaching an edge.
* Request a scroll if he is.
*/
static void MonitorScroll() {
int newx, newy;
int Loffset, Toffset;
/*
* Only do it if the actor is there and is visible
*/
if (!g_pScrollMover || MoverHidden(g_pScrollMover) || !MoverIs(g_pScrollMover))
return;
GetActorPos(g_scrollActor, &newx, &newy);
if (g_oldx == newx && g_oldy == newy)
return;
PlayfieldGetPos(FIELD_WORLD, &Loffset, &Toffset);
/*
* Approaching right side or left side of the screen?
*/
if (newx > Loffset+SCREEN_WIDTH - RLDISTANCE && Loffset < g_ImageW - SCREEN_WIDTH) {
if (newx > g_oldx)
NeedScroll(LEFT);
} else if (newx < Loffset + RLDISTANCE && Loffset) {
if (newx < g_oldx)
NeedScroll(RIGHT);
}
/*
* Approaching bottom or top of the screen?
*/
if (newy > Toffset+SCREEN_HEIGHT-DDISTANCE && Toffset < g_ImageH-SCREEN_HEIGHT) {
if (newy > g_oldy)
NeedScroll(UP);
} else if (Toffset && newy < Toffset + UDISTANCE + GetActorBottom(g_scrollActor) - GetActorTop(g_scrollActor)) {
if (newy < g_oldy)
NeedScroll(DOWN);
}
g_oldx = newx;
g_oldy = newy;
}
/**
* Called from TagProcess, FirstTaggedActor() resets the index, then
* NextTagged Actor is repeatedly called until the caller gets fed up
* or there are no more tagged actors to look at.
*/
int NextTaggedActor() {
PMOVER pActor;
bool hid;
while (ti < NumActors) {
if (actorInfo[ti].tagged) {
pActor = GetMover(ti+1);
if (pActor)
hid = MoverHidden(pActor);
else
hid = actorInfo[ti].bHidden;
if (!hid) {
return ++ti;
}
}
++ti;
}
return 0;
}
