/**
* Register an actor as being a moving one.
*/
PMOVER RegisterMover(int ano) {
int i;
// Slot 0 is reserved for lead actor
if (ano == GetLeadId() || ano == LEAD_ACTOR) {
g_Movers[0].actorToken = TOKEN_LEAD;
g_Movers[0].actorID = GetLeadId();
return &g_Movers[0];
}
// Check it hasn't already been declared
for (i = 1; i < MAX_MOVERS; i++) {
if (g_Movers[i].actorID == ano) {
// Actor is already a moving actor
return &g_Movers[i];
}
}
// Find an empty slot
for (i = 1; i < MAX_MOVERS; i++)
if (!g_Movers[i].actorID) {
g_Movers[i].actorToken = TOKEN_LEAD + i;
g_Movers[i].actorID = ano;
return &g_Movers[i];
}
error("Too many moving actors");
}
/**
* 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;
}
/**
* Given an actor number, return pointer to its moving actor structure,
* if it is a moving actor.
*/
PMOVER GetMover(int ano) {
int i;
// Slot 0 is reserved for lead actor
if (ano == GetLeadId() || ano == LEAD_ACTOR)
return &g_Movers[0];
for (i = 1; i < MAX_MOVERS; i++)
if (g_Movers[i].actorID == ano)
return &g_Movers[i];
return NULL;
}
/**
* Decide when to scroll and scroll when decided to.
*/
void ScrollProcess(CORO_PARAM, const void *) {
// COROUTINE
CORO_BEGIN_CONTEXT;
CORO_END_CONTEXT(_ctx);
CORO_BEGIN_CODE(_ctx);
// In Tinsel v2, scenes may play movies, so the background may not always
// already be initialized like it is in v1
while (!GetBgObject())
CORO_SLEEP(1);
g_ImageH = BgHeight(); // Dimensions
g_ImageW = BgWidth(); // of this scene.
// Give up if there'll be no purpose in this process
if (g_ImageW == SCREEN_WIDTH && g_ImageH == SCREEN_HEIGHT)
CORO_KILL_SELF();
if (!TinselV2) {
g_LeftScroll = g_DownScroll = 0; // No iterations outstanding
g_oldx = g_oldy = 0;
g_scrollPixelsX = g_scrollPixelsY = SCROLLPIXELS;
}
if (!g_scrollActor)
g_scrollActor = GetLeadId();
g_pScrollMover = GetMover(g_scrollActor);
while (1) {
MonitorScroll(); // Set scroll requirement
if (g_LeftScroll || g_DownScroll) // Scroll if required
ScrollImage();
CORO_SLEEP(1); // allow re-scheduling
}
CORO_END_CODE;
}
