Added: prototype event system

src/events.cpp

@@ -0,0 +1,184 @@
+#include "events.h"
+#include "virtual.h"
+#include "r_utility.h"
+
+DEventHandler* E_FirstDEventHandler = nullptr;
+
+void E_RegisterHandler(DEventHandler* handler)
+{
+	if (handler == nullptr || handler->ObjectFlags & OF_EuthanizeMe)
+		return;
+	// link into normal list
+	handler->prev = nullptr;
+	handler->next = E_FirstDEventHandler;
+	if (handler->next)
+		handler->next->prev = handler;
+	E_FirstDEventHandler = handler;
+}
+
+void E_UnregisterHandler(DEventHandler* handler)
+{
+	if (handler == nullptr || handler->ObjectFlags & OF_EuthanizeMe)
+		return;
+	// link out of normal list
+	if (handler->prev)
+		handler->prev->next = handler->next;
+	if (handler->next)
+		handler->next->prev = handler->prev;
+	if (handler == E_FirstDEventHandler)
+		E_FirstDEventHandler = handler->next;
+}
+
+void E_MapLoaded()
+{
+	for (DEventHandler* handler = E_FirstDEventHandler; handler; handler = handler->next)
+		handler->MapLoaded();
+}
+
+void E_MapUnloading()
+{
+	for (DEventHandler* handler = E_FirstDEventHandler; handler; handler = handler->next)
+		handler->MapUnloading();
+}
+
+void E_RenderFrame()
+{
+	for (DEventHandler* handler = E_FirstDEventHandler; handler; handler = handler->next)
+		handler->RenderFrame();
+}
+
+void E_RenderCamera()
+{
+	for (DEventHandler* handler = E_FirstDEventHandler; handler; handler = handler->next)
+		handler->RenderCamera();
+}
+
+// declarations
+IMPLEMENT_CLASS(DEventHandler, false, false);
+IMPLEMENT_CLASS(DRenderEventHandler, false, false);
+
+DEFINE_FIELD_X(RenderEventHandler, DRenderEventHandler, ViewPos);
+DEFINE_FIELD_X(RenderEventHandler, DRenderEventHandler, ViewAngle);
+DEFINE_FIELD_X(RenderEventHandler, DRenderEventHandler, ViewPitch);
+DEFINE_FIELD_X(RenderEventHandler, DRenderEventHandler, ViewRoll);
+DEFINE_FIELD_X(RenderEventHandler, DRenderEventHandler, FracTic);
+
+DEFINE_ACTION_FUNCTION(DEventHandler, Create)
+{
+	PARAM_PROLOGUE;
+	PARAM_CLASS(t, DEventHandler);
+	// generate a new object of this type.
+	ACTION_RETURN_OBJECT(t->CreateNew());
+}
+
+DEFINE_ACTION_FUNCTION(DEventHandler, Register)
+{
+	PARAM_PROLOGUE;
+	PARAM_OBJECT(handler, DEventHandler);
+	E_RegisterHandler(handler);
+	return 0;
+}
+
+DEFINE_ACTION_FUNCTION(DEventHandler, Unregister)
+{
+	PARAM_PROLOGUE;
+	PARAM_OBJECT(handler, DEventHandler);
+	E_UnregisterHandler(handler);
+	return 0;
+}
+
+DEFINE_ACTION_FUNCTION(DEventHandler, MapLoaded)
+{
+	PARAM_SELF_PROLOGUE(DEventHandler);
+	// do nothing
+	return 0;
+}
+
+DEFINE_ACTION_FUNCTION(DEventHandler, MapUnloading)
+{
+	PARAM_SELF_PROLOGUE(DEventHandler);
+	// do nothing
+	return 0;
+}
+
+DEFINE_ACTION_FUNCTION(DEventHandler, RenderFrame)
+{
+	PARAM_SELF_PROLOGUE(DEventHandler);
+	// do nothing
+	return 0;
+}
+
+DEFINE_ACTION_FUNCTION(DEventHandler, RenderCamera)
+{
+	PARAM_SELF_PROLOGUE(DEventHandler);
+	// do nothing
+	return 0;
+}
+
+//
+void DEventHandler::OnDestroy()
+{
+	E_UnregisterHandler(this);
+	DObject::OnDestroy();
+}
+
+void DEventHandler::MapLoaded()
+{
+	IFVIRTUAL(DEventHandler, MapLoaded)
+	{
+		// Without the type cast this picks the 'void *' assignment...
+		VMValue params[1] = { (DEventHandler*)this };
+		GlobalVMStack.Call(func, params, 1, nullptr, 0, nullptr);
+	}
+}
+
+void DEventHandler::MapUnloading()
+{
+	IFVIRTUAL(DEventHandler, MapUnloading)
+	{
+		// Without the type cast this picks the 'void *' assignment...
+		VMValue params[1] = { (DEventHandler*)this };
+		GlobalVMStack.Call(func, params, 1, nullptr, 0, nullptr);
+	}
+}
+
+void DEventHandler::RenderFrame()
+{
+	IFVIRTUAL(DEventHandler, RenderFrame)
+	{
+		// Without the type cast this picks the 'void *' assignment...
+		VMValue params[1] = { (DEventHandler*)this };
+		GlobalVMStack.Call(func, params, 1, nullptr, 0, nullptr);
+	}
+}
+
+void DEventHandler::RenderCamera()
+{
+	IFVIRTUAL(DEventHandler, RenderCamera)
+	{
+		// Without the type cast this picks the 'void *' assignment...
+		VMValue params[1] = { (DEventHandler*)this };
+		GlobalVMStack.Call(func, params, 1, nullptr, 0, nullptr);
+	}
+}
+
+void DRenderEventHandler::Setup()
+{
+	ViewPos = ::ViewPos;
+	ViewAngle = ::ViewAngle;
+	ViewPitch = ::ViewPitch;
+	ViewRoll = ::ViewRoll;
+	FracTic = ::r_TicFracF;
+}
+
+void DRenderEventHandler::RenderFrame()
+{
+	Setup();
+	DEventHandler::RenderFrame();
+}
+
+void DRenderEventHandler::RenderCamera()
+{
+	Setup();
+	DEventHandler::RenderCamera();
+}