Unity控制物体透明度的探索（包含递归遍历的方法）_u3d uv纹理递归遍历

由于项目要求，要实现对物体透明度的控制，就开始了探索之路。

首先考虑到的是改变其Color中的alpha值，但是未能实现控制，因其Rending Mode属性为Opaque，所以要改变此属性。下面为该部分代码：

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;
		}
	}

首先，我要改变的是建筑模型，有些有子物体，其中还有些并没有材质球，所以要遍历所有子物体，并找出有材质球的部分。

private void ToTransparent(GameObject obj){
		if (obj.gameObject.GetComponent<MeshRenderer>())
		{
			obj.gameObject.GetComponent<MeshRenderer>().material.color = new Color(1.0f, 1.0f, 1.0f, gameObject.GetComponent<UISlider> ().value);
			SetMaterialRenderingMode(obj.gameObject.GetComponent<MeshRenderer>().material, RenderingMode.Fade);
			if (gameObject.GetComponent<UISlider> ().value >= 0.9)
			{
				SetMaterialRenderingMode(obj.gameObject.GetComponent<MeshRenderer>().material, RenderingMode.Opaque);
			}
			children [i] = obj;
			i++;
		}
		foreach(Transform child in obj.transform){
			ToTransparent(child.gameObject);
		}
	}

通过调用该方法，改为Fade，则可以通过改变Alpha值的方法改变透明度。但是接下来会遇到部分建筑为变透明的现象，查找原因，是因为只改变了其第一个材质球，所以还要遍历一下材质球。

public void OnChange(){
		//遍历物体下的每个材质球，否则只改变第一个
		for(int m=0;m<i;m++){
			foreach(Material child in children[m].gameObject.GetComponent<MeshRenderer>().materials){
				child.color = new Color(1.0f, 1.0f, 1.0f, gameObject.GetComponent<UISlider> ().value);
			}
			//children[m].gameObject.GetComponent<MeshRenderer>().material.color = new Color(1.0f, 1.0f, 1.0f, gameObject.GetComponent<UISlider> ().value);
			if (gameObject.GetComponent<UISlider> ().value >= 0.9) {
				SetMaterialRenderingMode (children [m].gameObject.GetComponent<MeshRenderer> ().material, RenderingMode.Opaque);
			} else {
				SetMaterialRenderingMode(children[m].gameObject.GetComponent<MeshRenderer>().material, RenderingMode.Fade);
			}
		}
	}

仅为本人摸索的方法，若有更好的方法请留言，不胜感激。