unity通过WWW方式加载.obj文件

约定不等于承诺〃 2022-08-26 11:15 166阅读 0赞

using UnityEngine;
    using System.Collections;
    using System.IO;
    using System.Collections.Generic;
    using System.Globalization;
    
    public class ObjReaderInSence : MonoBehaviour {
    	Mesh _myMesh;
    	Material _myMaterial = new Material(Shader.Find("Diffuse"));
    	
    	Vector3[] _vertexArray;
    	ArrayList _vertexArrayList = new ArrayList();
    	Vector3[] _normalArray;
    	ArrayList _normalArrayList = new ArrayList();
    	Vector2[] _uvArray;
    	ArrayList _uvArrayList = new ArrayList();
    	
    	int[] _triangleArray;
    	
    	ArrayList _facesVertNormUV = new ArrayList();
    	
        internal class PlacesByIndex {
    		public PlacesByIndex(int index) {
    			_index = index;
    		}
    		public int _index;
    		public ArrayList _places = new ArrayList();
        }
    	void initArrayLists() {
    		_uvArrayList = new ArrayList();
    		_normalArrayList = new ArrayList();
    		_vertexArrayList = new ArrayList();
    		_facesVertNormUV = new ArrayList();
    	}
    	
    	public IEnumerator SomeFunction(string path,string _textureLink) {;
    		GameObject obj_gameobject = new GameObject();
    		obj_gameobject.name = path;
    		initArrayLists();
    		if (_myMesh != null)
    			_myMesh.Clear();
    		_myMesh = new Mesh();
    		_myMesh.name = path;
    		WWW www3d = new WWW(path);
    		yield return www3d;
    		string s = www3d.data;
    		s = s.Replace("  ", " ");
    		s = s.Replace("  ", " ");
    		LoadFile(s);
    		_myMesh.vertices = _vertexArray;
    		_myMesh.triangles = _triangleArray;
    		if (_uvArrayList.Count > 0)
    			_myMesh.uv = _uvArray;
    		if (_normalArrayList.Count > 0)
    			_myMesh.normals = _normalArray;
    		else
    			_myMesh.RecalculateNormals();
    		_myMesh.RecalculateBounds();
    		if ((MeshFilter)obj_gameobject.GetComponent("MeshFilter") == null)
    			obj_gameobject.AddComponent("MeshFilter");
    		MeshFilter temp;
    		temp = (MeshFilter)obj_gameobject.GetComponent("MeshFilter");
    		temp.mesh = _myMesh;
    		if ((MeshRenderer)obj_gameobject.GetComponent("MeshRenderer") == null)
    			obj_gameobject.AddComponent("MeshRenderer");
    		if (_uvArrayList.Count > 0 && _textureLink != "") {
    			WWW wwwtx = new WWW(_textureLink);
    			yield return wwwtx;
    			_myMaterial.mainTexture = wwwtx.texture;
    		}
    		MeshRenderer temp2;
    		temp2 = (MeshRenderer)obj_gameobject.GetComponent("MeshRenderer");
    		if (_uvArrayList.Count > 0 && _textureLink != "") {
    			temp2.material = _myMaterial;
    			_myMaterial.shader = Shader.Find("Diffuse");
    		}
    		yield return new WaitForFixedUpdate();
    	}
    	
    	public void LoadFile(string s) {
    		string[] lines = s.Split("\n"[0]);
    		
    		foreach (string item in lines) {
    			ReadLine(item);
    		}
    		ArrayList tempArrayList = new ArrayList();
    		for (int i = 0; i < _facesVertNormUV.Count; ++i) {
    			if (_facesVertNormUV[i] != null) {
    				PlacesByIndex indextemp = new PlacesByIndex(i);
    				indextemp._places.Add(i);
    				for (int j = 0; j < _facesVertNormUV.Count; ++j) {
    					if (_facesVertNormUV[j] != null) {
    						if (i != j) {
    							Vector3 iTemp = (Vector3)_facesVertNormUV[i];
    							Vector3 jTemp = (Vector3)_facesVertNormUV[j];
    							if (iTemp.x == jTemp.x && iTemp.y == jTemp.y) {
    								indextemp._places.Add(j);
    								_facesVertNormUV[j] = null;
    							}
    						}
    					}
    				}
    				tempArrayList.Add(indextemp);
    			}
    		}
    		_vertexArray = new Vector3[tempArrayList.Count];
    		_uvArray = new Vector2[tempArrayList.Count];
    		_normalArray = new Vector3[tempArrayList.Count];
    		_triangleArray = new int[_facesVertNormUV.Count];
    		int teller = 0;
    		foreach (PlacesByIndex item in tempArrayList) {
    			foreach (int item2 in item._places) {
    				_triangleArray[item2] = teller;
    			}
    			Vector3 vTemp = (Vector3)_facesVertNormUV[item._index];
    			_vertexArray[teller] = (Vector3)_vertexArrayList[(int)vTemp.x - 1];
    			if (_uvArrayList.Count > 0) {
    				Vector3 tVec = (Vector3)_uvArrayList[(int)vTemp.y - 1];
    				_uvArray[teller] = new Vector2(tVec.x, tVec.y);
    			}
    			if (_normalArrayList.Count > 0) {
    				_normalArray[teller] = (Vector3)_normalArrayList[(int)vTemp.z - 1];
    			}
    			teller++;
    		}
    	}
    	
    	public void ReadLine(string s) {
    		char[] charsToTrim = {' ', '\n', '\t', '\r'};
    		s= s.TrimEnd(charsToTrim);
    		string[] words = s.Split(" "[0]);
    		foreach (string item in words)
    			item.Trim();
    		if (words[0] == "v")
    			_vertexArrayList.Add(new Vector3(System.Convert.ToSingle(words[1], CultureInfo.InvariantCulture), System.Convert.ToSingle(words[2], CultureInfo.InvariantCulture), System.Convert.ToSingle(words[3], CultureInfo.InvariantCulture)));
    
    		if (words[0] == "vn")
    			_normalArrayList.Add(new Vector3(System.Convert.ToSingle(words[1], CultureInfo.InvariantCulture), System.Convert.ToSingle(words[2], CultureInfo.InvariantCulture), System.Convert.ToSingle(words[3], CultureInfo.InvariantCulture)));
    		if (words[0] == "vt") 
    			_uvArrayList.Add(new Vector3(System.Convert.ToSingle(words[1], CultureInfo.InvariantCulture), System.Convert.ToSingle(words[2], CultureInfo.InvariantCulture)));
    		if (words[0] == "f") {
    			ArrayList temp = new ArrayList();
    			ArrayList triangleList = new ArrayList();
    			for (int j = 1; j < words.Length; ++j)
    			{
    				Vector3 indexVector = new Vector3(0,0);
    				string[] indices = words[j].Split("/"[0]);
    				indexVector.x = System.Convert.ToInt32(indices[0], CultureInfo.InvariantCulture);
    				if (indices.Length > 1) {
    					if (indices[1] != "")
    						indexVector.y = System.Convert.ToInt32(indices[1], CultureInfo.InvariantCulture);
    				}
    				if (indices.Length > 2) {
    					if (indices[2] != "")
    						indexVector.z = System.Convert.ToInt32(indices[2], CultureInfo.InvariantCulture);
    				}
    				temp.Add(indexVector);
    			}
    			for (int i = 1; i < temp.Count - 1; ++i) {
    				triangleList.Add(temp[0]);
    				triangleList.Add(temp[i]);
    				triangleList.Add(temp[i+1]);
    			}
    
    			foreach (Vector3 item in triangleList) {
    				_facesVertNormUV.Add(item);
    			}
    		}
    	}
    }

using UnityEngine;
    using System.Collections;
    
    public class Test : MonoBehaviour {
    
    	// Use this for initialization
    	void Start () {
    		string path = "file:///Users/dilitech/Desktop/panzhiwei/unity356/testobj/Test/AW_055_YIGUI_1(Clone).obj";
    		string _textureLink = "";
    		ObjReaderInSence obj = new ObjReaderInSence();
    		StartCoroutine(obj.SomeFunction(path,_textureLink));//obj路径&&贴图路径
    	}
    	
    	// Update is called once per frame
    	void Update () {
    	
    	}
    }