Unity 3D Developer

The inspector panel allows users to modify numeric values (such as position, rotation and scale), drag and drop references of scene objects (like Prefabs, Materials and Game Objects), and others. Also it can show a custom-made UI, created by the user, by using Editor scripts.

The project panel contains files from the file system of the assets folder in the project's root folder. It shows all the available scripts, textures, materials and shaders available for use in the project.

The hierarchy panel shows the current scene structure, with its GameObjects and its children. It also helps users organize them by name and order relative to the GameObject's siblings. Order dependent features, such as UI, make use of this categorization.

The panel responsible for referencing content in the build process is the hierarchy panel. The panel contains references to the objects that exist, or will exist, when the application is executed. When building the project, Unity searches for them in the project panel, and adds them to the bundle.

The issue is that you can't modify the position from a transform directly. This is because the position is actually a property (not a field). Therefore, when a getter is called, it invokes a method which returns a Vector3 copy which it places into the stack.

So basically what you are doing in the code above is assigning a member of the struct a value that is in the stack and that is later removed.

Instead, the proper solution is to replace the whole property; e.g.:

using UnityEngine;

using System.Collections;

public class TEST : MonoBehaviour {

void Start () {

Vector3 newPos = new Vector3(10, transform.position.y, transform.position.z);

transform.position = newPos;

}

}

☛ Difference between Update,Fixed Update and Late Update.

☛ What is Prefabs in Unity 3D?

☛ What is the use of AssetBundle in Unity?

☛ What is difference between Resources and StreamingAssets Folder.

☛ What is Batching and what is the use of Batching?

☛ Difference between Destroy and DestroyImmediate unity function

☛ Difference between Start and Awake Unity Events

☛ What is the use of deltatime?

☛ Is this possible to collide two mesh collider,if yes then How?

☛ Difference between Static and Dynamic Batching.

☛ What is the use of Occlusion Culling?

☛ How can you call C# from Javascript, and vice versa?

☛ What is Coroutine,is it running on new thread?

☛ Difference between Stack and Heap.

☛ What do you mean by Inheritance ? Explain with example.

☛ What do you mean by Polymorohism? Explain with example.

☛ What is overriding ?

☛ What is overloading ?

☛ Difference between overriding and overloading.

☛ What is the use of Virtual keyword ?

☛ Difference between Static Class and Singleton.

☛ What is Abstract Class ?

☛ Difference between Abstract Class and interface.

☛ What is Serialization and De-Serialization ?

☛ Does C# support multiple inheritance ?

☛ What do you mean by Generic Function or Generic Class ?

Some important Unity 3D components include:

► Toolbar: It features several important manipulation tools for the scene and game windows.

► Scene View: It is a fully rendered 3 D preview of the currently open scene is displayed and enables you to add, edit and remove GameObjects

► Hierarchy: It displays a list of every GameObject within the current scene view

► Project Window: In complex games, project window searches for specific game assets as needed. It explores the assets directory for all textures, scripts, models and prefabs used within the project

► Game View: In unity you can view your game and at the same time make changes to your game while you are playing in real time.

No. Texture and Meshes are examples of elements stored in GPU memory and Unity doesn't allow other threads, besides the main one, to make modifications on these kinds of data.

No. Fetching the Transform reference isn't thread safe in Unity.

When using threads, we must avoid using native Unity structures like the Mathf and Random classes:

class RandomGenerator : MonoBehaviour

{

public float[] randomList;

void Start()

{

randomList = new float[1000000];

Thread t = new Thread(delegate()

{

while(true)

{

Generate();

Thread.Sleep(16); // trigger the loop to run roughly every 60th of a second

}

});

t.Start();

}

void Generate()

{

System.Random rnd = new System.Random();

for(int i=0;i<randomList.Length;i++) randomList[i] = (float)rnd.NextDouble();

}

}

► Cache component references: Always cache reference to components you need to use your scripts

► Memory Allocation: Instead of instantiating the new object on the fly, always consider creating and using object pools. It will help to less memory fragmentation and make the garbage collector work less

► Layers and collision matrix: For each new layer, a new column and row are added on the collision matrix. This matrix is responsible for defining interactions between layers

► Raycasts: It enables to fire a ray on a certain direction with a certain length and let you know if it hit something

► Physics 2D 3D: Choose physics engine that suits your game

► Rigidbody: It is an essential component when adding physical interactions between objects

► Fixed Timestep: Fixed timestep value directly impacts the fixedupdate() and physics update rate.

UE4:

► Game logic is written in C++ or blueprint editor

► Base scene object- Actor

► Input Events- Component UInputComponent of Actor class

► Main classes and function of UE4 includes int32,int24, Fstring, Ftransform, FQuat, FRotator, Actor and TArray

► To create a new instance of a specified class and to point towards the newly created Actor. UWorld::SpawnActor() may be used

► UI of Unreal Engine 4 is more flexible and less prone to crashes

► It does not support systems like X-box 360 or PS3, it requires AMD Radeon HD card to function properly

► Less expensive compare to Unity3D

► To use UE4 you don't need programming language knowledge

Unity3D:

► Game logic is written using the Mono environment

► Base scene object- GameObject

► Input events- Class Input

► Main classes and function include int,string,quaternion,transform, rotation, gameobject, Array

► To make a copy of an object you can use the function Instantiate()

► The asset store of this tool is much better stacked than UE4

► It supports wide range of gaming consoles like X-box and PS4, as well as their predecessors

► Unity3D has free version which lacks few functionality while pro version is bit expensive in compare to UE4

► It requires programming language knowledge.