Управление геймплеем

1. Create a new C++ component and call it LevelManager.Создайте новый компонент C++ и назовите его LevelManager.

2. Write the following code in an IDE and save the solution. Build and run the solution to generate a property file for the component.Напишите следующий код в среде IDE и сохраните решение. Создайте и запустите решение, чтобы сгенерировать файл свойств для компонента.

   Примечание

   Take note that the LevelManager component's init() method is set to be called in the 2nd order to make sure it is initialized after the ObjectGenerator component which creates and parents all physical objects to it (ObjectGenerator's initialization order is set to 1st).Обратите внимание, что метод init() компонента LevelManager настроен на вызов во 2-м порядке, чтобы убедиться, что он инициализирован после компонента ObjectGenerator, который создает и привязывает к нему все физические объекты (порядок инициализации ObjectGenerator установлен на 1-й).
   LevelManager.h (С++)

   #pragma once
   #include <UnigineComponentSystem.h>
   
   #include <UnigineWidgets.h>
   #include <UnigineGame.h>
   #include <UnigineString.h>
   
   class LevelManager : public Unigine::ComponentBase
   {
   public:
   	// declare constructor and destructor for our class and define a property name. 
   	COMPONENT_DEFINE(LevelManager, ComponentBase)
   	// declare methods to be called at the corresponding stages of the execution sequence
   	COMPONENT_INIT(init, 2); // 2nd initialization order
   	COMPONENT_UPDATE(update);
   	COMPONENT_SHUTDOWN(shutdown);
   	// level timer
   	PROP_PARAM(Float, timer, 100.0f);
   
   	void decPhysicalObjectsNum();
   	void setEndGameCallback(Unigine::CallbackBase *callback) { endGameEvent = callback; }
   
   protected:
   	void init();
   	void update();
   	void shutdown();
   
   	void initGUI();
   
   private:
   	Unigine::CallbackBase *endGameEvent = nullptr;
   
   	bool isCounting = true;
   
   	int physicalObjectsNum;
   
   	Unigine::WidgetLabelPtr widget_timer, widget_goal;
   
   	Unigine::ObjectTextPtr endText;
   };

   LevelManager.cpp (С++)

   #include "LevelManager.h"
   
   using namespace Unigine;
   using namespace Math;
   
   REGISTER_COMPONENT(LevelManager);
   
   void LevelManager::init()
   {
   	LevelManager::initGUI();
   
   	// find the object text node of the widget
   	endText = checked_ptr_cast<ObjectText>(Game::getPlayer()->findNode("header_text", 1));
   
   	// count dynamic objects in the level
   	physicalObjectsNum = node->getNumChildren();
   
   }
   
   void LevelManager::initGUI()
   {
   	// get a GUI pointer
   	GuiPtr gui = Gui::getCurrent();
   
   	// create a label widget and set up its parameters
   	widget_timer = WidgetLabel::create(gui, "Time Left:");
   	widget_timer->setPosition(10, 10);
   	widget_timer->setFontColor(vec4_red);
   
   	widget_goal = WidgetLabel::create(gui, "Objects Left: ");
   	widget_goal->setPosition(10, 30);
   	widget_goal->setFontColor(vec4_blue);
   
   	// add widgets to the GUI
   	gui->addChild(widget_timer, Gui::ALIGN_OVERLAP);
   	gui->addChild(widget_goal, Gui::ALIGN_OVERLAP);
   }
   
   void LevelManager::update()
   {
   	// decrease the timer
   	if (isCounting)
   	{
   		timer = timer - Game::getIFps();
   		if (timer <= 0)
   		{
   			//set end game text
   			if (endText) endText->setText("Game Over");
   			if (endGameEvent) endGameEvent->run();
   			isCounting = false;
   		}
   	}
   
   	// show the current time and objects left to clear
   	if (isCounting)
   	{
   		widget_timer->setText(String::format("Time Left: %.2f s", timer.get()));
   		widget_goal->setText(String::format("Objects Left: %d", physicalObjectsNum));
   	}
   	//hide the widgets on endgame
   	else
   	{
   		widget_timer->setEnabled(false);
   		widget_goal->setEnabled(false);
   	}
   	
   	//win
   	if (physicalObjectsNum <= 0)
   	{
   		if (endText) endText->setText("Success!");
   		if (endGameEvent) endGameEvent->run();
   		isCounting = false;
   	}
   }
   
   void LevelManager::shutdown()
   {
   	widget_timer->deleteLater();
   	widget_goal->deleteLater();
   }
   
   void LevelManager::decPhysicalObjectsNum()
   {
   	physicalObjectsNum--;
   }

3. Switch back to UnigineEditor and create a new Dummy Node called level_manager and place it somewhere in the world.Переключитесь обратно на UnigineEditor и создайте новую Dummy Node с именем level_manager и поместите ее где-нибудь в мире.

4. Add a LevelManager component to the level_manager node via the Parameters window in the UnigineEditor.Добавьте компонент LevelManager к ноде level_manager через окно Parameters в UnigineEditor.

   

We created the system GUI via the API from the code. The alternative method is to use UI files.Мы создали системный графический интерфейс с помощью API из кода. Альтернативный метод заключается в использовании файлов пользовательского интерфейса.

1. Open the KillZone component in your IDE, add a levelManager field and replace the content of the Enter callback function according to the following code.Откройте компонент KillZone в вашей IDE, добавьте поле levelManager и замените содержимое функции обратного вызова Enter в соответствии со следующим кодом.

   KillZone.h (C++)

   #pragma once
   #include <UnigineComponentSystem.h>
   
   #include <UnigineWorlds.h>
   
   //========================== NEW - BEGIN ===============================
   #include "LevelManager.h"
   //=========================== NEW - END ================================
   
   class KillZone : public Unigine::ComponentBase
   {
   public:
   	// declare constructor and destructor for our class and define a property name. 
   	COMPONENT_DEFINE(KillZone, ComponentBase)
   	// declare methods to be called at the corresponding stages of the execution sequence
   	COMPONENT_INIT(init);
   
   protected:
   	void init();
   	
   	void enterCallback(Unigine::NodePtr target);
   
   private:
   	// the area into which an object should fall
   	Unigine::WorldTriggerPtr trigger;
   
   //========================== NEW - BEGIN ===============================
   	LevelManager *levelManager;
   //=========================== NEW - END ================================
   
   };

   KillZone.cpp (C++)

   #include "KillZone.h"
   
   using namespace Unigine;
   
   REGISTER_COMPONENT(KillZone);
   
   void KillZone::init()
   {
   	trigger = checked_ptr_cast<WorldTrigger>(node);
   
   	// set the callback to be executed when an object enters the area
   	if (trigger)
   		trigger->addEnterCallback(MakeCallback(this, &KillZone::enterCallback));
   }
   
   //========================== NEW - BEGIN ===============================
   void KillZone::enterCallback(NodePtr target)
   {
   	levelManager = getComponentInParent<LevelManager>(target);
   	// check if the parent node has a LevelManager component attached
   	if (levelManager)
   	{
   		// delete the entered node and decrease the amount of physical objects
   		levelManager->decPhysicalObjectsNum();
   		target->deleteLater();
   	}
   }
   //=========================== NEW - END ================================

2. Let's set the level_manager node as a parent to physical objects. Open the ObjectGenerator component in your IDE and replace the code in the corresponding files with the following. Save the code in your IDE, build and run the solution to regenerate a property file for the component and switch back to UnigineEditor.Давайте установим ноду level_manager в качестве родительской ноды для физических объектов. Откройте компонент ObjectGenerator в вашей IDE и замените код в соответствующих файлах следующим. Сохраните код в своей среде разработки, создайте и запустите решение для восстановления файла свойств для компонента и вернитесь к UnigineEditor.

   ObjectGenerator.h (C++)

   #include <UnigineComponentSystem.h>
   #include <UnigineGame.h>
   
   #pragma once
   class ObjectGenerator : public Unigine::ComponentBase
   {
   
   public:
   	COMPONENT_DEFINE(ObjectGenerator, ComponentBase);
   	COMPONENT_INIT(init, 1); // 1st initialization order
   
   //========================== NEW - BEGIN ===============================
   	PROP_PARAM(Node, levelManager);
   //=========================== NEW - END ================================
   
   protected:
   	void init();
   };

   ObjectGenerator.cpp (C++)

   #include "ObjectGenerator.h"
   
   using namespace Unigine;
   
   REGISTER_COMPONENT(ObjectGenerator);
   
   void ObjectGenerator::init()
   {
   
   //========================== NEW - BEGIN ===============================
   	if (levelManager)
   	{
   //=========================== NEW - END ================================
   
   		// cube 
   		MeshPtr meshBox = Mesh::create();
   		meshBox->addBoxSurface("box_surface", Math::vec3(1.0f));
   		ObjectMeshStaticPtr box = ObjectMeshStatic::create(meshBox);
   
   		//========================== NEW - BEGIN ===============================
   		box->setParent(levelManager);
   		//========================== NEW - END ===============================
   
   		box->setTriggerInteractionEnabled(1);
   		box->setIntersectionMask(0x00000080, meshBox->findSurface("box_surface")); // check the BulletIntersection bit
   		box->setWorldTransform(translate(Math::Vec3(0.5f, 7.5f, 1.0f)));
   		box->setMaterialPath("materials/mesh_base_0", "*");
   		box->setName("box");
   		Unigine::BodyRigidPtr bodyBox = BodyRigid::create(box);
   		ShapeBoxPtr shapeBox = ShapeBox::create(bodyBox, Math::vec3(1.0f));
   		ShapeSphere::create(bodyBox, 0.5f);
   		bodyBox->setShapeBased(0);
   		bodyBox->setMass(2.0f);
   
   		// sphere
   		MeshPtr meshSphere = Mesh::create();
   		meshSphere->addSphereSurface("sphere_surface", 0.5f, 9, 32);
   		ObjectMeshStaticPtr sphere = ObjectMeshStatic::create(meshSphere);
   
   		//========================== NEW - BEGIN ===============================
   		sphere->setParent(levelManager);
   		//========================== NEW - END ===============================
   
   		sphere->setTriggerInteractionEnabled(1);
   		sphere->setIntersectionMask(0x00000080, meshSphere->findSurface("sphere_surface")); // check the BulletIntersection bit
   		sphere->setWorldTransform(translate(Math::Vec3(4.5f, 5.5f, 1.0f)));
   		sphere->setMaterialPath("materials/mesh_base_1", "*");
   		sphere->setName("sphere");
   		BodyRigidPtr bodySphere = BodyRigid::create(sphere);
   		ShapeSphere::create(bodySphere, 0.5f);
   		bodySphere->setShapeBased(0);
   		bodySphere->setMass(2.0f);
   
   		// capsule
   		MeshPtr meshCapsule = Mesh::create();
   		meshCapsule->addCapsuleSurface("capsule_surface", 0.5f, 1.0f, 9, 32);
   		ObjectMeshStaticPtr capsule = ObjectMeshStatic::create(meshCapsule);
   
   		//========================== NEW - BEGIN ===============================
   		capsule->setParent(levelManager);
   		//========================== NEW - END ===============================
   
   		capsule->setTriggerInteractionEnabled(1);
   		capsule->setIntersectionMask(0x00000080, meshCapsule->findSurface("capsule_surface")); // check the BulletIntersection bit
   		capsule->setWorldTransform(translate(Math::Vec3(4.5f, 0.5f, 3.0f)));
   		capsule->setMaterialPath("materials/mesh_base_2", "*");
   		capsule->setName("capsule");
   		BodyRigidPtr bodyCapsule = BodyRigid::create(capsule);
   		ShapeCapsule::create(bodyCapsule, 0.5f, 1.0f);
   		bodyCapsule->setShapeBased(0);
   		bodyCapsule->setMass(2.0f);
   
   //========================== NEW - BEGIN ===============================
   	}
   //=========================== NEW - END ================================
   
   }

3. Select the object_generator node in the World Nodes window and drag the level_manager node to the corresponding field of the ObjectGenerator property.Выберите ноду object_generator в окне World Nodes и перетащите ноду level_manager в соответствующее поле свойства ObjectGenerator.

   

4. Save changes to the world. Go to File->Save World or press Ctrl+S hotkey.Сохраните изменения в мире. Перейдите к File->Save World или нажмите горячую клавишу Ctrl+S.
5. Switch to your IDE. Save changes to the solution and then build and run the game to see the game rules in action.Переключитесь на свой IDE. Сохраните изменения в решении, а затем создайте и запустите игру, чтобы увидеть геймплей в действии.