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/* Starshatter: The Open Source Project
Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors
Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
Copyright (c) 1997-2006, Destroyer Studios LLC.
AUTHOR: John DiCamillo
OVERVIEW
========
Simulation Object and Observer classes
*/
#include "SimObject.h"
#include "Graphic.h"
#include "Light.h"
#include "Scene.h"
// +--------------------------------------------------------------------+
SimObserver::~SimObserver()
{
ListIter<SimObject> observed = observe_list;
while (++observed)
observed->Unregister(this);
}
void
SimObserver::Observe(SimObject* obj)
{
if (obj) {
obj->Register(this);
if (!observe_list.contains(obj))
observe_list.append(obj);
}
}
void
SimObserver::Ignore(SimObject* obj)
{
if (obj) {
obj->Unregister(this);
observe_list.remove(obj);
}
}
bool
SimObserver::Update(SimObject* obj)
{
if (obj)
observe_list.remove(obj);
return true;
}
const char*
SimObserver::GetObserverName() const
{
static char name[32];
sprintf_s(name, "SimObserver 0x%08x", (DWORD) this);
return name;
}
// +--------------------------------------------------------------------+
SimObject::~SimObject()
{
Notify();
}
// +--------------------------------------------------------------------+
void
SimObject::Notify()
{
if (!notifying) {
notifying = true;
int nobservers = observers.size();
int nupdate = 0;
if (nobservers > 0) {
ListIter<SimObserver> iter = observers;
while (++iter) {
SimObserver* observer = iter.value();
observer->Update(this);
nupdate++;
}
observers.clear();
}
if (nobservers != nupdate) {
::Print("WARNING: incomplete notify sim object '%s' - %d of %d notified\n",
Name(), nupdate, nobservers);
}
notifying = false;
}
else {
::Print("WARNING: double notify on sim object '%s'\n", Name());
}
}
// +--------------------------------------------------------------------+
void
SimObject::Register(SimObserver* observer)
{
if (!notifying && !observers.contains(observer))
observers.append(observer);
}
// +--------------------------------------------------------------------+
void
SimObject::Unregister(SimObserver* observer)
{
if (!notifying)
observers.remove(observer);
}
// +--------------------------------------------------------------------+
void
SimObject::Activate(Scene& scene)
{
if (rep)
scene.AddGraphic(rep);
if (light)
scene.AddLight(light);
active = true;
}
void
SimObject::Deactivate(Scene& scene)
{
if (rep)
scene.DelGraphic(rep);
if (light)
scene.DelLight(light);
active = false;
}
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