12个基本的Unity或Unity3D面试问题 *

Pixel shader is a script that runs for each fragment (pixel candidate to be rendered) after three vertexes are processed in a mesh’s triangle. 开发人员可以使用像 UV / TextureCoords and sample textures in order to control the final color that will be rendered on screen.

For large scenes, the number of pixels rendered is usually bigger than the number of pixels in the screen itself.

Deferred Lighting makes the scene render all pixels without illumination (which is fast), 并且具有额外的信息(以低开销为代价), it calculates the illumination step only for the pixels of the screen buffer (which is less than all pixels processed for each element). 这种技术允许在项目中有更多的光照实例.

如果要更改 A to B in 1.0秒你不能简单地增加 A by B-A between two frames because frames can run fast or slow, so one frame can have different durations.

纠正这种情况的方法是测量从帧中取走的时间 X to X+1 and increment A，利用帧持续时间的变化 deltaTime by doing A += (B-A) * DeltaTime.

When the accumulated DeltaTime reaches 1.0 second, A will have assumed B value.

The Update 使用c#反射调用回调, 哪个比直接调用函数要慢得多. In our example, 1000 GameObjects each with a MonoBehaviour 意味着每帧有1000个反射调用.

Creating one MonoBehaviour with one Update，并使用这个回调来 Update a given number of elements, is a lot faster, due to the direct access to the method.

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. 面板包含对现有对象的引用, or will exist, 当应用程序执行时. When building the project, Unity searches for them in the project panel, and adds them to the bundle.

Awake()
OnEnable()
Start()
Update()
LateUpdate()
OnGUI()
OnApplicationQuit()
OnDisable()
OnDestroy()

注意:您可能不同意的位置 OnApplicationQuit() in the above list, but it is correct which can be verified by logging the order in which call occurs when your application closes.

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;

公共类TEST: MonoBehaviour {
   void Start () {
        Vector3 newPos =新Vector3(10，变换.position.y, transform.position.z);
        transform.position = newPos;
    }
}

Developers can use this information to adjust their materials and make better use of the Z-Test and optimize the rendering.