Unity3D如何实现动态分辨率降低渲染开销
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之前项目降低分辨率我们都普遍使用Screen.SetResolution，但是它有两个问题。
1.每次设置的时候屏幕会闪烁。
2.降低分辨率与摄像机无关，无法做到只降低3D摄像机的分辨率，保留UI摄像机不降低分辨率。
其实我们可以使用摄像机动态分辨率，如下图所示，给需要降低分辨率的摄像机打开allow Dynamic Resolution属性。
如下图所示，在ProjectSetting上必须勾选Enable Frame Timing Stats属性。
代码中就可以很方便设置分辨率了。
ScalableBufferManager.ResizeBuffers(m_widthScale, m_heightScale);
如下图所示在iPhone X上，频繁设置3D摄像机分辨率并不会出现闪烁的情况，而且并没有影响UI摄像机看到的文本(Text)的分辨率
需要注意的是动态分辨率安卓Android（仅适用于Vulkan） 或者也可以用SRP可编程渲染管线，最后在修改RT这样就都支持了。
using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.UI; public class DynamicResolutionTest : MonoBehaviour{ public Text screenText; FrameTiming[] frameTimings = new FrameTiming[3]; public float maxResolutionWidthScale = 1.0f; public float maxResolutionHeightScale = 1.0f; public float minResolutionWidthScale = 0.5f; public float minResolutionHeightScale = 0.5f; public float scaleWidthIncrement = 0.1f; public float scaleHeightIncrement = 0.1f; float m_widthScale = 1.0f; float m_heightScale = 1.0f; // Variables for dynamic resolution algorithm that persist across frames uint m_frameCount = 0; const uint kNumFrameTimings = 2; double m_gpuFrameTime; double m_cpuFrameTime; // Use this for initialization void Start() { int rezWidth = (int)Mathf.Ceil(ScalableBufferManager.widthScaleFactor * Screen.currentResolution.width); int rezHeight = (int)Mathf.Ceil(ScalableBufferManager.heightScaleFactor * Screen.currentResolution.height); screenText.text = string.Format("Scale: {0:F3}x{1:F3}\nResolution: {2}x{3}\n", m_widthScale, m_heightScale, rezWidth, rezHeight); } private void OnGUI() { float oldWidthScale = m_widthScale; float oldHeightScale = m_heightScale; // One finger lowers the resolution if (GUILayout.Button("--")) { m_heightScale = Mathf.Max(minResolutionHeightScale, m_heightScale - scaleHeightIncrement); m_widthScale = Mathf.Max(minResolutionWidthScale, m_widthScale - scaleWidthIncrement); } // Two fingers raises the resolution if (GUILayout.Button("++")) { m_heightScale = Mathf.Min(maxResolutionHeightScale, m_heightScale + scaleHeightIncrement); m_widthScale = Mathf.Min(maxResolutionWidthScale, m_widthScale + scaleWidthIncrement); } if (m_widthScale != oldWidthScale || m_heightScale != oldHeightScale) { ScalableBufferManager.ResizeBuffers(m_widthScale, m_heightScale); } } // Update is called once per frame void Update() { DetermineResolution(); int rezWidth = (int)Mathf.Ceil(ScalableBufferManager.widthScaleFactor * Screen.currentResolution.width); int rezHeight = (int)Mathf.Ceil(ScalableBufferManager.heightScaleFactor * Screen.currentResolution.height); screenText.text = string.Format("Scale: {0:F3}x{1:F3}\n动态分辨率: {2}x{3}\nScaleFactor: {4:F3}x{5:F3}\nGPU: {6:F3} CPU: {7:F3}", m_widthScale, m_heightScale, rezWidth, rezHeight, ScalableBufferManager.widthScaleFactor, ScalableBufferManager.heightScaleFactor, m_gpuFrameTime, m_cpuFrameTime); } // Estimate the next frame time and update the resolution scale if necessary. private void DetermineResolution() { ++m_frameCount; if (m_frameCount <= kNumFrameTimings) { return; } FrameTimingManager.CaptureFrameTimings(); FrameTimingManager.GetLatestTimings(kNumFrameTimings, frameTimings); if (frameTimings.Length < kNumFrameTimings) { Debug.LogFormat("Skipping frame {0}, didn't get enough frame timings.", m_frameCount); return; } m_gpuFrameTime = (double)frameTimings[0].gpuFrameTime; m_cpuFrameTime = (double)frameTimings[0].cpuFrameTime; }} 以上是“Unity3D如何实现动态分辨率降低渲染开销”这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注创新互联行业资讯频道！
文章名称：Unity3D如何实现动态分辨率降低渲染开销
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