管理游戏规则

1. Create a new C# component and call it LevelManager.创建一个新的 C# 组件 并将其命名为 LevelManager。

2. Open the LevelManager component in an IDE and copy the code below. Save your code in an IDE to ensure it's automatic compilation on switching back to UnigineEditor. LevelManager开放组件在IDE和复制下面的代码。您的代码保存在一个IDE,以确保它是自动切换回UnigineEditor编译。

   LevelManager.cs

   using System;
   using System.Collections;
   using System.Collections.Generic;
   using Unigine;
    
   [Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
   public class LevelManager : Component
   {
   	// level timer
   	public float timer = 100.0f; 
   
   	bool isCounting = true;
   
   	int physicalObjectsNum;
   	
   	WidgetLabel widget_timer, widget_goal;
   
   	void Init()
   	{
   		InitGUI();
   		// count physical objects in the level
   		physicalObjectsNum = node.NumChildren;
   	}
   
   	void InitGUI()
   	{
   		// getting a GUI pointer
   		Gui gui = Gui.GetCurrent();
   
   		// creating a label widget and setting up its parameters
   		widget_timer = new WidgetLabel(gui, "Time Left:");
   		widget_timer.SetPosition(10, 10);
   		widget_timer.FontColor = vec4.RED;
   
   		widget_goal = new WidgetLabel(gui, "Objects Left: ");
   		widget_goal.SetPosition(10, 30);
   		widget_goal.FontColor = vec4.BLUE; 
   
   		// add widgets to the GUI
   		gui.AddChild(widget_timer, Gui.ALIGN_OVERLAP);
   		gui.AddChild(widget_goal, Gui.ALIGN_OVERLAP);
   	}
   
   	void Update()
   	{
   		// decrease the timer
   		if (isCounting)
   		{
   			timer -= Game.IFps;
   			if (timer <= 0)
   			{
   				//end game
   				isCounting = false;
   			}
   		}
   
   		//win
   		if (physicalObjectsNum <= 0)
   		{
   			isCounting = false;
   		}
   
   		// show the current time and objects left to clear
   		if (isCounting)
   		{
   			widget_timer.Text = "Time Left: " + timer.ToString("0.0") + " s";
   			widget_goal.Text = "Objects Left: " + physicalObjectsNum.ToString();
   		}
   		//hide the widgets on end game
   		else
   		{
   			widget_timer.Enabled = false;
   			widget_goal.Enabled = false;
   		}
   	}
   
   	void Shutdown()
   	{
   		widget_timer.DeleteLater();
   		widget_goal.DeleteLater();
   	}
   
   	public void DecPhysicalObjectsNum()
   	{
   		physicalObjectsNum--;
   	}
   }

3. Create a new Dummy Node called "level_manager" and place it somewhere in the world.创建一个名为 "level_manager" 的新 虚拟节点，并将其放置在世界某处。

4. Add the LevelManager component to the level_manager node.LevelManager组件添加到level_manager节点。

   

We created the system GUI via the API from the code. The alternative method is to use UI files.我们通过 代码中的 API 创建了系统 GUI。 另一种方法是使用 UI 文件。

1. Open the KillZone component in your IDE, add a levelManager field and replace the content of Enter callback function according to the following code. Save your code in an IDE to ensure it's automatic compilation on switching back to UnigineEditor.在你的 IDE 中打开 KillZone 组件，添加一个 levelManager 字段并将 Enter callback 函数的内容替换为如下 代码。 将您的代码保存在 IDE 中，以确保在切换回 UnigineEditor 时自动编译。

   KillZone.cs

   using System;
   using System.Collections;
   using System.Collections.Generic;
   using Unigine;
   
   [Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
   public class KillZone : Component
   {
   	// the area into which an object should fall
   	WorldTrigger trigger;
   //========================== NEW - BEGIN ===============================
   	LevelManager levelManager;
   //=========================== NEW - END ================================
   	void Init()
   	{
   		trigger = node as WorldTrigger;
   
   		if (trigger != null)
   			trigger.EventEnter.Connect(Enter); // set the handler to be executed when an object enters the area
   	}
   
   	void Enter(Node target)
   	{
   //========================== NEW - BEGIN ===============================
   		levelManager = target.GetComponentInParent<LevelManager>();
   		// check if the parent node has a LevelManager component attached
   		if (levelManager != null)
   		{
   			// 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 with the following. Save the code in your IDE and switch back to UnigineEditor.让我们设置level_manager节点作为一个家长物理对象。在IDE中打开ObjectGenerator组件和替换用下面的代码。保存您的IDE中的代码并切换回UnigineEditor。

   ObjectGenerator.cs (C#)

   using System;
   using System.Collections;
   using System.Collections.Generic;
   using Unigine;
   
   [Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
   public class ObjectGenerator : Component
   {
   //========================== NEW - BEGIN ===============================
   	public Node levelManager;
   //=========================== NEW - END ================================
   	private void Init()
   	{
   //========================== NEW - BEGIN ===============================
   		if (levelManager)
   		{
   //=========================== NEW - END ================================
   			// cube 
   			ObjectMeshDynamic box = Primitives.CreateBox(new vec3(1.0f));
   			//========================== NEW - BEGIN =============================
   			box.Parent = levelManager;
   			//========================== NEW - END ===============================
   			box.TriggerInteractionEnabled = true;
   			box.SetIntersection(true, 0);
   			box.SetIntersectionMask(0x00000080, 0); // check the BulletIntersection bit
   			box.WorldTransform = MathLib.Translate(new vec3(0.5f, 7.5f, 1.0f));
   			box.SetMaterialPath("materials/mesh_base_0.mat", "*");
   			box.Name = "box";
   			BodyRigid bodyBox = new BodyRigid(box);
   			ShapeBox shapeBox = new ShapeBox(bodyBox, new vec3(1.0f));
   			new ShapeSphere(bodyBox, 0.5f);
   			bodyBox.ShapeBased = false;
   			bodyBox.Mass = 2.0f;
   
   			// sphere
   			ObjectMeshDynamic sphere = Primitives.CreateSphere(0.5f, 9, 32);
   			//========================== NEW - BEGIN ===============================
   			sphere.Parent = levelManager;
   			//========================== NEW - END ===============================
   			sphere.TriggerInteractionEnabled = true;
   			sphere.SetIntersection(true, 0);
   			sphere.SetIntersectionMask(0x00000080, 0); // check the BulletIntersection bit
   			sphere.WorldTransform = MathLib.Translate(new vec3(4.5f, 5.5f, 1.0f));
   			sphere.SetMaterialPath("materials/mesh_base_1.mat", "*");
   			sphere.Name = "sphere";
   			BodyRigid bodySphere = new BodyRigid(sphere);
   			new ShapeSphere(bodySphere, 0.5f);
   			bodySphere.ShapeBased = false;
   			bodySphere.Mass = 2.0f;
   
   			// capsule
   			ObjectMeshDynamic capsule = Primitives.CreateCapsule(0.5f, 1.0f, 9, 32);
   			//========================== NEW - BEGIN ===============================
   			capsule.Parent = levelManager;
   			//========================== NEW - END ===============================
   			capsule.TriggerInteractionEnabled = true;
   			capsule.SetIntersection(true, 0);
   			capsule.SetIntersectionMask(0x00000080, 0); // check the BulletIntersection bit
   			capsule.WorldTransform = MathLib.Translate(new vec3(4.5f, 0.5f, 3.0f));
   			capsule.SetMaterialPath("materials/mesh_base_2.mat", "*");
   			capsule.Name = "capsule";
   			BodyRigid bodyCapsule = new BodyRigid(capsule);
   			new ShapeCapsule(bodyCapsule, 0.5f, 1.0f);
   			bodyCapsule.ShapeBased = false;
   			bodyCapsule.Mass = 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 component.选择object_generator节点World Nodes窗口拖动level_manager节点的对应字段ObjectGenerator组件。

   

4. Save changes to the world, go to File->Save World or press Ctrl+S hotkey. Then run the game to see the game rules in action.保存对世界的更改，转到 File->Save World 或按 Ctrl+S 热键。 然后运行游戏以查看实际的游戏规则。