Unity performance optimization Shader function usage example

Unity Performance Optimization Shader Analysis Processing Function: Usage

Source code

Performance optimization is a very important aspect in Unity development. A common performance optimization trick is to use functions to get the global keywords of the shader. This article will explain how to use the function correctly and provide an example code to demonstrate its usage.

What is a function?

is an internal function in the Unity engine that allows us to get the global keywords of a shader. Global keywords are some switches defined in the shader and can be used to control the different functions and effects of the shader. By getting these keywords, we can dynamically modify the behavior of the shader at runtime, thus achieving better performance and results.

How to use functions?

Since it is an internal tagged function, we need to use reflection to call it. Here is a sample code showing how to use the function correctly:

using System;
using ;
using UnityEditor;
using UnityEngine;
public class ShaderUtilExample : MonoBehaviour
{
    private void Start()
    {
        // Get the currently activated shader        Shader shader = GetComponent<Renderer>().;
        // Call the GetShaderGlobalKeywords function using reflection        MethodInfo getShaderGlobalKeywords = typeof(ShaderUtil).GetMethod("GetShaderGlobalKeywords",  | );
        string[] globalKeywords = (string[])(null, new object[] { shader });
        // Print global keywords        foreach (string keyword in globalKeywords)
        {
            (keyword);
        }
    }
}

In the example code above, we first get the currently activated shader. We then use reflection to call the GetShaderGlobalKeywords function and pass the current shader to it as a parameter. The function returns an array of strings containing global keywords, and we can access each keyword by iterating through the array.

Note that since GetShaderGlobalKeywords is an internal function, it may change in future Unity versions. Therefore, when using this function, we need to be careful and make sure that we perform appropriate testing and tweaks when updating the Unity version.

Summarize

By using functions, we can get the global keywords of the shader, thus achieving better performance and effect. This article provides a sample code that calls the function using reflection to help you understand how to use it correctly. In actual development, you can flexibly use this function to optimize performance according to your needs and scenarios.

Hope this article will be helpful to you in Unity performance optimization!

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