static bool WouldCollide(const Game_Character& self, const Game_Character& other, bool self_conflict) {
if (self.GetThrough() || other.GetThrough()) {
return false;
}
if (self.IsFlying() || other.IsFlying()) {
return false;
}
if (!self.IsActive() || !other.IsActive()) {
return false;
}
if (self.GetType() == Game_Character::Event
&& other.GetType() == Game_Character::Event
&& (self.IsOverlapForbidden() || other.IsOverlapForbidden())) {
return true;
}
if (other.GetLayer() == RPG::EventPage::Layers_same && self_conflict) {
return true;
}
if (self.GetLayer() == other.GetLayer()) {
return true;
}
return false;
}
/**
* Checks whether a collision occurs between self and other if self
* moves from (x,y) to (new_x, new_y) in direction d.
*
* If other is a tile event, also indicates if the player can use it
* as a "bridge" to step across without hitting the underlying tile
* layer.
*/
static CollisionResult TestCollisionDuringMove(
int x,
int y,
int new_x,
int new_y,
int d,
const Game_Character& self,
const Game_Event& other
) {
if (!other.GetActive()) {
return NoCollision;
}
if (&self == &other) {
return NoCollision;
}
if (other.GetThrough()) {
return NoCollision;
}
if (!other.IsInPosition(x, y) && !other.IsInPosition(new_x, new_y)) {
return NoCollision;
}
if (&self != Main_Data::game_player.get()) {
if (other.IsInPosition(new_x, new_y) && (self.IsOverlapForbidden() || other.IsOverlapForbidden())) {
return Collision;
}
}
if (other.IsInPosition(new_x, new_y) && self.GetLayer() == other.GetLayer()) {
return Collision;
}
if (other.GetLayer() == RPG::EventPage::Layers_below) {
int tile_id = other.GetTileId();
if ((passages_up[tile_id] & Passable::Above) != 0) {
return NoCollision;
}
if (other.IsInPosition(x,y) && (passages_up[tile_id] & DirToMask(d)) != 0) {
return CanStepOffCurrentTile;
}
else if (other.IsInPosition(new_x, new_y) && (passages_up[tile_id] & DirToMask(Game_Character::ReverseDir(d))) != 0) {
return CanStepOntoNewTile;
} else {
return Collision;
}
}
return NoCollision;
}