Question

JavaScript => public static var active: RenderTexture;
C# => public static RenderTexture active;

Description 描述

Currently active render texture.

激活当前的渲染贴图。

All rendering goes into the active RenderTexture. If the active RenderTexture is null everything is rendered in the main window.

所有渲染进入激活渲染纹理。如果激活渲染纹理为空在主窗口的所有物体被渲染。

Setting RenderTexture.active is the same as calling Graphics.SetRenderTarget. Typically you change or query the active render texture when implementing custom graphics effects; if all you need is to make a Camera render into a texture then use Camera.targetTexture instead.

设置RenderTexture.active是与调用Graphics.SetRenderTarget一样。当执行自定义图形效果时你可以改变或者查询激活渲染纹理；如果你需要所有的摄像机渲染到纹理那么使用Camera.targetTexture代替。

When a RenderTexture becomes active its hardware rendering context is automatically created if it hasn't been created already.

当渲染纹理变成激活，如果它没有被创建，它的硬件渲染环境是自动创建的。

JavaScript:

#pragma strict
// Get the contents of a RenderTexture into a Texture2D
public static function GetRTPixels(rt: RenderTexture) {
	// Remember currently active render texture
	var currentActiveRT: RenderTexture = RenderTexture.active;
	// Set the supplied RenderTexture as the active one
	RenderTexture.active = rt;
	// Create a new Texture2D and read the RenderTexture image into it
	var tex: Texture2D = new Texture2D(rt.width, rt.height);
	tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
	// Restorie previously active render texture
	RenderTexture.active = currentActiveRT;
	return tex;
}

C#:

using UnityEngine;
using System.Collections;
 
// Get the contents of a RenderTexture into a Texture2D
public class ExampleClass : MonoBehaviour {
    static public Texture2D GetRTPixels(RenderTexture rt) {
 
        // Remember currently active render texture
        RenderTexture currentActiveRT = RenderTexture.active;
 
        // Set the supplied RenderTexture as the active one
        RenderTexture.active = rt;
 
        // Create a new Texture2D and read the RenderTexture image into it
        Texture2D tex = new Texture2D(rt.width, rt.height);
        tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
 
        // Restorie previously active render texture
        RenderTexture.active = currentActiveRT;
        return tex;
    }
}

rendertexture