/**
* 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;
}
/**
* Returns the position of the mid-top of the actor.
* Delegate the task for moving actors.
* @param ano Actor Id
* @param x Output x
* @param y Output y
*/
void GetActorMidTop(int ano, int *x, int *y) {
// Not used in JAPAN version
PMOVER pActor;
assert((ano > 0 && ano <= NumActors) || ano == LEAD_ACTOR); // unknown actor
pActor = GetMover(ano);
if (pActor)
GetMoverMidTop(pActor, x, y);
else if (TinselV2) {
*x = (GetActorLeft(ano) + GetActorRight(ano)) / 2;
*y = GetActorTop(ano);
} else if (actorInfo[ano - 1].presObj) {
*x = (MultiLeftmost(actorInfo[ano - 1].presObj)
+ MultiRightmost(actorInfo[ano - 1].presObj)) / 2;
*y = MultiHighest(actorInfo[ano - 1].presObj);
} else
GetActorPos(ano, x, y); // The best we can do!
}
void DllWrapperGetActorPos( int actorPosPtrAddress, ActorId actorId )
{
float* actorPosPtr = (float*)actorPosPtrAddress;
GetActorPos( actorPosPtr, actorId );
}
