unity代码控制物体的透明度总结_unity 20%透明度

以前测试过的成功实例，主图如下，默认材料可能不行，要新建一个拖到物体上，此例用的rendering mode是不透明模式即opaque，30的透明度（下面的例子用opaque原始透明度255就不行，所以保险起见还是选用fade模式好，0-255的透明度全部可以）：

 代码如下（如果物体的材料的属性设置成fade，可能就不用SetMaterialRenderingMode函数了，例子2就没有SetMaterialRenderingMode函数）：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class ChangeAparent : MonoBehaviour
{
    float transparentvalue = 1.0f;
public enum RenderingMode
        {
            Opaque,
            Cutout,
            Fade,
            Transparent,
        }
 
        public static void SetMaterialRenderingMode(Material material, RenderingMode renderingMode)
        {
            switch (renderingMode)
            {
                case RenderingMode.Opaque:
                    material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
                    material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
                    material.SetInt("_ZWrite", 1);
                    material.DisableKeyword("_ALPHATEST_ON");
                    material.DisableKeyword("_ALPHABLEND_ON");
                    material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
                    material.renderQueue = -1;
                    break;
                case RenderingMode.Cutout:
                    material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
                    material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
                    material.SetInt("_ZWrite", 1);
                    material.EnableKeyword("_ALPHATEST_ON");
                    material.DisableKeyword("_ALPHABLEND_ON");
                    material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
                    material.renderQueue = 2450;
                    break;
                case RenderingMode.Fade:
                    material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
                    material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
                    material.SetInt("_ZWrite", 0);
                    material.DisableKeyword("_ALPHATEST_ON");
                    material.EnableKeyword("_ALPHABLEND_ON");
                    material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
                    material.renderQueue = 3000;
                    break;
                case RenderingMode.Transparent:
                    material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
                    material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
                    material.SetInt("_ZWrite", 0);
                    material.DisableKeyword("_ALPHATEST_ON");
                    material.DisableKeyword("_ALPHABLEND_ON");
                    material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
                    material.renderQueue = 3000;
                    break;
            }
        }
 public void OnTransparentTapped()
        {
            if (transparentvalue > 0)
                transparentvalue -= 0.1f;
            else
                transparentvalue = 1.0f;//到头了，重置
            GameObject.Find("SampleAnchorMe").GetComponent<MeshRenderer>().material.color = new Color(1, 1, 1, transparentvalue);
            SetMaterialRenderingMode(GameObject.Find("SampleAnchorMe").GetComponent<MeshRenderer>().material, RenderingMode.Fade);//此模式效果最好
      }
}

以上方法会改变物体的颜色为白色，为了不改变颜色，只改变透明度，用以下例子2。

代码挂载到button上，如下 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class ChangeAparent : MonoBehaviour
{
    float transparentvalue = 1.0f;
    public void changeit()//改变透明度
    {
        if (transparentvalue > 0)
            transparentvalue -= 0.1f;
        else
            transparentvalue = 1.0f;//到头了，重置
 
 
        Color a = GameObject.Find("Screw1").GetComponent<MeshRenderer>().material.color;
        a.a = transparentvalue;
        GameObject.Find("Screw1").GetComponent<MeshRenderer>().material.color = a;
 
        Color b = GameObject.Find("Screw2").GetComponent<MeshRenderer>().material.color;
        b.a = transparentvalue;
        GameObject.Find("Screw2").GetComponent<MeshRenderer>().material.color = b;
 
        Debug.Log($"transparentvalue is: {transparentvalue}");
 
    }
}

材料设置如下：

 另外单一改变某个物体（代码挂载到此物体上）颜色的代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Spherecolor : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        GetComponent<Renderer>().material.color = new Color(0, 1, 0);
    }
 
    // Update is called once per frame
    void Update()
    {
        
    }
}