如何为除一个对象之外的所有场景创建模糊效果(专注于该对象)? [英] How to create blur effect to all the scene except for one object (focus on that object)?

问题描述

我想创建一个类似于下图的模糊效果:

图片来自本站:

确保在 All Packages 视图中，搜索 post，找到 Post Processing 包并点击 Install

<小时>

现在首先转到图层设置(图层 → 编辑图层)

并添加两个附加层:例如PostProcessing 和 Focused

现在是相机.Afaik 无论您是否在 VR 中都没有区别，通常您有一个 MainCamera 与您的耳机一起移动.如果您的项目设置中应该有两个，只需对第二个相机重复相同的步骤.

1. 确保 MainCamera 不会渲染两个添加的图层 →从 Culling Mask
中删除它们

2. 添加一个新的相机 FocusCamera 作为现有 MainCamera 的子级.这样它就会随着主相机自动移动.

   RightClick on MainCamera &rightarrow Camera

   它应该具有与 MainCamera 相同的所有设置 除了:

   • 清除标志 : 不清除
     如果将其设置为 Depth Only，则聚焦对象将始终呈现在所有内容之上，即使它实际上位于 3D 空间中的其他对象之后.你决定你想要的效果在这里;)
   • CullingMask : only Focused
   • Depth : 任何高于 MainCamera 的东西，所以这个相机在它上面渲染
   • 确保删除 AudioListener 组件.

3. 最后添加一个新的 PostProcessingVolume 到场景中.我会将它作为子项添加到 FocusCamera！为什么?- 因为这样它会与 FocusCamera 一起自动禁用！

   RightClick on FocusCamera →3D 物体 →后期处理量

   将其Layer设置为添加的PostProcessing

   启用 Is Global 以便与音量的距离无关紧要，并通过点击 new → 添加一个新的配置文件.统一 →景深

   在您的情况下，您想覆盖 Focus Distance，因此请选中左侧的框并设置一个靠近相机的值，例如0.5

到目前为止，您的场景中没有任何真正改变.

现在转到 MainCamera 和组件 PostProcessingLayer 并将 Layer 设置为我们添加的图层 PostProcessing

现在场景中的一切都应该模糊了！

几乎准备好了！现在禁用 FocusCamera 并将此脚本添加到其中

使用UnityEngine；公共类 FocusSwitcher:MonoBehaviour{公共字符串 FocusedLayer = "Focused";当前关注的私有游戏对象；私有 int 前一层；公共无效SetFocused(游戏对象对象){//启用此相机和作为子项的 postProcessingVolumegameObject.SetActive(true);//如果在重置之前有其他东西被聚焦if (currentlyFocused) currentFocused.layer = previousLayer;//存储并聚焦新对象当前聚焦 = obj;如果(当前焦点){previousLayer = currentFocused.layer;currentFocused.layer = LayerMask.NameToLayer(FocusedLayer);}别的{//如果没有对象被聚焦，则禁用 FocusCamera//和 PostProcessingVolume 不浪费渲染资源gameObject.SetActive(false);}}//在禁用时确保重置当前对象私有无效 OnDisable(){if (currentlyFocused) currentFocused.layer =previousLayer;当前聚焦 = 空；}}

这将允许您通过将某个 GameObject 的层更改为我们添加的 Focused 层来将其聚焦在运行时，这是唯一由 FocusCamera 渲染的层.所以这个物体会被渲染在图像之上，没有任何模糊效果！

<小时>

为了演示，我只是将这个简单的脚本添加到每个立方体对象中，以便在鼠标进入时启用焦点并在鼠标退出时禁用它:

使用UnityEngine；公共类 FocusMe:MonoBehaviour{[SerializeField] 私有 FocusSwitcher 焦点；私有无效 OnMouseEnter(){focus.SetFocused(gameObject);}私有无效 OnMouseExit(){//重置焦点//将来你可能应该先检查一下//如果这个对象实际上是当前的焦点对象focus.SetFocused(null);}}

这是它的样子

<小时>

如前所述，我不知道您的 VR 设置究竟是什么样子.如果您必须使用 MainCameras，只需向其中添加两个子摄像机即可.您仍然只需要一个 PostProcessingVolume 和一个 FocusSwitcher，因此您可能会将它们移动到另一个对象并以不同的方式处理相机禁用等，但我希望这个想法足够清晰.

I want to create a blur effect similar to the picture below:

the picture is taken from this site:

https://forum.unity.com/threads/how-to-blur-specific-layers-only.555520/

I tried the post-processing profile and played around with the depth of field in the post-processing volume but it blurs all the scene.

I came across a YouTube Video that explains how to implement similar results to what I am looking for but things have changed drastically in the settings. For example, at 1:57 (minute and 57 seconds) he clicks on Add Additional Camera Data which I am struggling to find in the latest versions of LWRP.

I am using Unity version 2019.2.9f1

How can I achieve the result in the picture above? (Blurring all the scene except for one object)

Your guidance will be appreciated.

NOTE: My project is in VR using SteamVR and VRTK

解决方案

Though your question is a bit broad I took some time to show you how it can be done.

---

First of all you will need to import the Post Processing package via the PackageManager

Window → PackageManager

Make sure to be in the All Packages view, search for post, find the Post Processing package and hit Install

---

Now first of all go to the Layer settings (Layers → Edit Layers)

and add two additional Layers: e.g. PostProcessing and Focused

Now to the cameras. Afaik it makes no difference whether you are in VR or not, usually you have one MainCamera that is moved along with your headset. If there should be two of them in your project setup just repeat the same steps for the second camera.

1. Make sure the MainCamera doesn't render the two added Layers → remove them from the Culling Mask

2. Add a new Camera FocusCamera as child to the existing MainCamera. This way it is automatically moved along with the main Camera.

   RightClick on MainCamera &rightarrow Camera

   It should have all the settings equal to the MainCamera except:

   • Clear Flags : Don't Clear
     If you set it to Depth Only the focused object will always be rendered on top of everything, even if it is actually behind other objects in 3D space. You decide which effect you want here ;)
   • CullingMask : only Focused
   • Depth : Anything higher than the MainCamera so this camera is rendered on top of it
   • Make sure to remove the AudioListener component.

3. Finally add a new PostProcessingVolume to the scene. I would add it as child to the FocusCamera! Why? - Because this way it is automatically disabled together with the FocusCamera!

   RightClick on FocusCamera → 3D Object → Post Processing Volume

   Set its Layer to the added PostProcessing

   enable Is Global so the distance to the volume doesn't matter and add a new profile by hitting new → Unity → Depth of field

   In your case you want to overwrite the Focus Distance so check the box on the left and set a value close to the camera like e.g. 0.5

Until now nothing has really changed in your scene.

Now go to the MainCamera and, a component PostProcessingLayer and set the Layer to our added layer PostProcessing

Now everything should be blurred in your scene!

Almost ready to go! Now Disable the FocusCamera and add this script to it

using UnityEngine;

public class FocusSwitcher : MonoBehaviour
{
    public string FocusedLayer = "Focused";

    private GameObject currentlyFocused;
    private int previousLayer;

    public void SetFocused(GameObject obj)
    {
        // enables this camera and the postProcessingVolume which is the child
        gameObject.SetActive(true);

        // if something else was focused before reset it
        if (currentlyFocused) currentlyFocused.layer = previousLayer;

        // store and focus the new object
        currentlyFocused = obj;

        if (currentlyFocused)
        {
            previousLayer = currentlyFocused.layer;
            currentlyFocused.layer = LayerMask.NameToLayer(FocusedLayer);
        }
        else
        {
            // if no object is focused disable the FocusCamera
            // and PostProcessingVolume for not wasting rendering resources
            gameObject.SetActive(false);
        }
    }

    // On disable make sure to reset the current object
    private void OnDisable()
    {
        if (currentlyFocused) currentlyFocused.layer =previousLayer;

        currentlyFocused = null;
    }
}

This will allow you to focus a certain GameObject on runtime by changing its layer to the Focused layer we added, the only one that is rendered by the FocusCamera. So this object will be rendered on top of the image without any blur effect!

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For demonstration I just added this simple script to every cube object in order to enable focus on mouse enter and disable it on mouse exit:

using UnityEngine;

public class FocusMe : MonoBehaviour
{
    [SerializeField] private FocusSwitcher focus;

    private void OnMouseEnter()
    {
        focus.SetFocused(gameObject);
    }

    private void OnMouseExit()
    {
        // reset the focus
        // in the future you should maybe check first
        // if this object is actually the focused one currently
        focus.SetFocused(null);
    }
}

And here is what it looks like

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as said I don't know exactly what your VR setup looks like. If you have to MainCameras simply add two child cameras to them. You still will need only one PostProcessingVolume and only one FocusSwitcher so you would probably move them to another object and handle the camera disabling etc differently but I hope the idea gets clear enough.

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