{"id":620,"date":"2012-12-17T21:50:22","date_gmt":"2012-12-17T21:50:22","guid":{"rendered":""},"modified":"2013-03-09T10:58:53","modified_gmt":"2013-03-09T02:58:53","slug":"620","status":"publish","type":"post","link":"https:\/\/1vr.cn\/?p=620","title":{"rendered":"\u8f93\u51faUnity\u7684\u573a\u666f\u6587\u4ef6\u4e3aObj\u6a21\u578b\u6587\u4ef6"},"content":{"rendered":"

\u5728Unity\u4e2d\u5efa\u7acb\u7684\u573a\u666f\u6587\u4ef6,\u6446\u653e\u7684\u6a21\u578b\u53ef\u4ee5\u7528\u4e0b\u5217\u811a\u672c\u5bfc\u51fa\u4e3aObj\u6a21\u578b\u6587\u4ef6,\u53ef\u4ee5\u4fdd\u6301\u573a\u666f\u4e2d\u6a21\u578b\u7684\u4f4d\u7f6e,\u8d34\u56fe\u706f\u4fe1\u606f.<\/p>\n

\u5c06\u811a\u672c\u547d\u540d\u4e3aObjExporter.cs,\u653e\u5728\u9879\u76ee\u7684Editor\u76ee\u5f55\u4e0b,\u9009\u62e9\u4f60\u8981\u5bfc\u51fa\u7684\u6a21\u578b\u7269\u4f53(\u53ef\u4ee5\u6709\u82e5\u5e72\u5b50\u7269\u4f53),\u5728\u7f16\u8f91\u5668\u83dc\u5355\u4e2d\u627e\u5230Custom\u7684\u8f93\u51fa\u9009\u9879,\u80fd\u770b\u5230\u4e09\u4e2a\u9009\u9879,\u5206\u522b\u662f”\u8f93\u51fa\u6240\u6709\u7f51\u683c\u5230\u5355\u4e00\u7684Obj\u6587\u4ef6”,”\u8f93\u51fa\u9009\u62e9\u7684\u7f51\u683c\u5408\u4f53\u5230\u4e00\u4e2aObj\u6587\u4ef6”,”\u8f93\u51fa\u6bcf\u4e2a\u9009\u62e9\u7684\u6a21\u578b\u5230\u5355\u4e00Obj\u6587\u4ef6”,\u4e00\u822c\u5e38\u7528\u7b2c\u4e8c\u9879.\u6210\u529f\u8f93\u51fa\u540e\u5c06\u5f39\u51fa\u5bf9\u8bdd\u6846,\u6a21\u578b\u548c\u5173\u8054\u7684\u8d34\u56fe\u5c06\u653e\u5230\u9879\u76ee\u7684\u6839\u76ee\u5f55\u7684”ExportedObj”\u6587\u4ef6\u5939\u4e2d.
\n
\nEditorObjExporter.cs\u811a\u672c:<\/p>\n

using UnityEngine;
\nusing UnityEditor;
\nusing System.Collections;
\nusing System.Collections.Generic;
\nusing System.IO;
\nusing System.Text;
\nusing System;<\/p>\n

struct ObjMaterial
\n{
\npublic string name;
\npublic string textureName;
\n}<\/p>\n

public class EditorObjExporter : ScriptableObject
\n{
\nprivate static int vertexOffset = 0;
\nprivate static int normalOffset = 0;
\nprivate static int uvOffset = 0;<\/p>\n

\/\/User should probably be able to change this. It is currently left as an excercise for
\n\/\/the reader.
\nprivate static string targetFolder = \"ExportedObj\";<\/p>\n

private static string MeshToString(MeshFilter mf, Dictionary<string, ObjMaterial> materialList)
\n{
\nMesh m = mf.sharedMesh;
\nMaterial[] mats = mf.renderer.sharedMaterials;<\/p>\n

StringBuilder sb = new StringBuilder();<\/p>\n

sb.Append(\"g \").Append(mf.name).Append(\"
\n\");
\nforeach(Vector3 lv in m.vertices)
\n{
\nVector3 wv = mf.transform.TransformPoint(lv);<\/p>\n

\/\/This is sort of ugly - inverting x-component since we're in
\n\/\/a different coordinate system than \"everyone\" is \"used to\".
\nsb.Append(string.Format(\"v {0} {1} {2}
\n\",-wv.x,wv.y,wv.z));
\n}
\nsb.Append(\"
\n\");<\/p>\n

foreach(Vector3 lv in m.normals)
\n{
\nVector3 wv = mf.transform.TransformDirection(lv);<\/p>\n

sb.Append(string.Format(\"vn {0} {1} {2}
\n\",-wv.x,wv.y,wv.z));
\n}
\nsb.Append(\"
\n\");<\/p>\n

foreach(Vector3 v in m.uv)
\n{
\nsb.Append(string.Format(\"vt {0} {1}
\n\",v.x,v.y));
\n}<\/p>\n

for (int material=0; material < m.subMeshCount; material ++) {
\nsb.Append(\"
\n\");
\nsb.Append(\"usemtl \").Append(mats[material].name).Append(\"
\n\");
\nsb.Append(\"usemap \").Append(mats[material].name).Append(\"
\n\");<\/p>\n

\/\/See if this material is already in the materiallist.
\ntry
\n{
\nObjMaterial objMaterial = new ObjMaterial();<\/p>\n

objMaterial.name = mats[material].name;<\/p>\n

if (mats[material].mainTexture)
\nobjMaterial.textureName = EditorUtility.GetAssetPath(mats[material].mainTexture);
\nelse
\nobjMaterial.textureName = null;<\/p>\n

materialList.Add(objMaterial.name, objMaterial);
\n}
\ncatch (ArgumentException)
\n{
\n\/\/Already in the dictionary
\n}<\/p>\n

int[] triangles = m.GetTriangles(material);
\nfor (int i=0;i<triangles.Length;i+=3)
\n{
\n\/\/Because we inverted the x-component, we also needed to alter the triangle winding.
\nsb.Append(string.Format(\"f {1}\/{1}\/{1} {0}\/{0}\/{0} {2}\/{2}\/{2}
\n\",
\ntriangles[i]+1 + vertexOffset, triangles[i+1]+1 + normalOffset, triangles[i+2]+1 + uvOffset));
\n}
\n}<\/p>\n

vertexOffset += m.vertices.Length;
\nnormalOffset += m.normals.Length;
\nuvOffset += m.uv.Length;<\/p>\n

return sb.ToString();
\n}<\/p>\n

private static void Clear()
\n{
\nvertexOffset = 0;
\nnormalOffset = 0;
\nuvOffset = 0;
\n}<\/p>\n

private static Dictionary<string, ObjMaterial> PrepareFileWrite()
\n{
\nClear();<\/p>\n

return new Dictionary<string, ObjMaterial>();
\n}<\/p>\n

private static void MaterialsToFile(Dictionary<string, ObjMaterial> materialList, string folder, string filename)
\n{
\nusing (StreamWriter sw = new StreamWriter(folder + \"\/\" + filename + \".mtl\"))
\n{
\nforeach( KeyValuePair<string, ObjMaterial> kvp in materialList )
\n{
\nsw.Write(\"
\n\");
\nsw.Write(\"newmtl {0}
\n\", kvp.Key);
\nsw.Write(\"Ka\u00a0\u00a00.6 0.6 0.6
\n\");
\nsw.Write(\"Kd\u00a0\u00a00.6 0.6 0.6
\n\");
\nsw.Write(\"Ks\u00a0\u00a00.9 0.9 0.9
\n\");
\nsw.Write(\"d\u00a0\u00a01.0
\n\");
\nsw.Write(\"Ns\u00a0\u00a00.0
\n\");
\nsw.Write(\"illum 2
\n\");<\/p>\n

if (kvp.Value.textureName != null)
\n{
\nstring destinationFile = kvp.Value.textureName;<\/p>\n

int stripIndex = destinationFile.LastIndexOf('\/');\/\/FIXME: Should be Path.PathSeparator;<\/p>\n

if (stripIndex >= 0)
\ndestinationFile = destinationFile.Substring(stripIndex + 1).Trim();<\/p>\n

string relativeFile = destinationFile;<\/p>\n

destinationFile = folder + \"\/\" + destinationFile;<\/p>\n

Debug.Log(\"Copying texture from \" + kvp.Value.textureName + \" to \" + destinationFile);<\/p>\n

try
\n{
\n\/\/Copy the source file
\nFile.Copy(kvp.Value.textureName, destinationFile);
\n}
\ncatch
\n{<\/p>\n

}<\/p>\n

sw.Write(\"map_Kd {0}\", relativeFile);
\n}<\/p>\n

sw.Write(\"<\/code><\/p>\n

“);
\n}
\n}
\n}<\/p>\n

private static void MeshToFile(MeshFilter mf, string folder, string filename)
\n{
\nDictionary<string, ObjMaterial> materialList = PrepareFileWrite();<\/p>\n

using (StreamWriter sw = new StreamWriter(folder +”\/” + filename + “.obj”))
\n{
\nsw.Write(“mtllib .\/” + filename + “.mtl
\n“);<\/p>\n

sw.Write(MeshToString(mf, materialList));
\n}<\/p>\n

MaterialsToFile(materialList, folder, filename);
\n}<\/p>\n

private static void MeshesToFile(MeshFilter[] mf, string folder, string filename)
\n{
\nDictionary<string, ObjMaterial> materialList = PrepareFileWrite();<\/p>\n

using (StreamWriter sw = new StreamWriter(folder +”\/” + filename + “.obj”))
\n{
\nsw.Write(“mtllib .\/” + filename + “.mtl
\n“);<\/p>\n

for (int i = 0; i < mf.Length; i++)
\n{
\nsw.Write(MeshToString(mf[i], materialList));
\n}
\n}<\/p>\n

MaterialsToFile(materialList, folder, filename);
\n}<\/p>\n

private static bool CreateTargetFolder()
\n{
\ntry
\n{
\nSystem.IO.Directory.CreateDirectory(targetFolder);
\n}
\ncatch
\n{
\nEditorUtility.DisplayDialog(“Error!”, “Failed to create target folder!”, “”);
\nreturn false;
\n}<\/p>\n

return true;
\n}<\/p>\n

[MenuItem (“Custom\/Export\/Export all MeshFilters in selection to separate OBJs”)]
\nstatic void ExportSelectionToSeparate()
\n{
\nif (!CreateTargetFolder())
\nreturn;<\/p>\n

Transform[] selection = Selection.GetTransforms(SelectionMode.Editable | SelectionMode.ExcludePrefab);<\/p>\n

if (selection.Length == 0)
\n{
\nEditorUtility.DisplayDialog(“No source object selected!”, “Please select one or more target objects”, “”);
\nreturn;
\n}<\/p>\n

int exportedObjects = 0;<\/p>\n

for (int i = 0; i < selection.Length; i++)
\n{
\nComponent[] meshfilter = selection[i].GetComponentsInChildren(typeof(MeshFilter));<\/p>\n

for (int m = 0; m < meshfilter.Length; m++)
\n{
\nexportedObjects++;
\nMeshToFile((MeshFilter)meshfilter[m], targetFolder, selection[i].name + “_” + i + “_” + m);
\n}
\n}<\/p>\n

if (exportedObjects > 0)
\nEditorUtility.DisplayDialog(“Objects exported”, “Exported ” + exportedObjects + ” objects”, “”);
\nelse
\nEditorUtility.DisplayDialog(“Objects not exported”, “Make sure at least some of your selected objects have mesh filters!”, “”);
\n}<\/p>\n

[MenuItem (“Custom\/Export\/Export whole selection to single OBJ”)]
\nstatic void ExportWholeSelectionToSingle()
\n{
\nif (!CreateTargetFolder())
\nreturn;<\/p>\n

Transform[] selection = Selection.GetTransforms(SelectionMode.Editable | SelectionMode.ExcludePrefab);<\/p>\n

if (selection.Length == 0)
\n{
\nEditorUtility.DisplayDialog(“No source object selected!”, “Please select one or more target objects”, “”);
\nreturn;
\n}<\/p>\n

int exportedObjects = 0;<\/p>\n

ArrayList mfList = new ArrayList();<\/p>\n

for (int i = 0; i < selection.Length; i++)
\n{
\nComponent[] meshfilter = selection[i].GetComponentsInChildren(typeof(MeshFilter));<\/p>\n

for (int m = 0; m < meshfilter.Length; m++)
\n{
\nexportedObjects++;
\nmfList.Add(meshfilter[m]);
\n}
\n}<\/p>\n

if (exportedObjects > 0)
\n{
\nMeshFilter[] mf = new MeshFilter[mfList.Count];<\/p>\n

for (int i = 0; i < mfList.Count; i++)
\n{
\nmf[i] = (MeshFilter)mfList[i];
\n}<\/p>\n

string filename = EditorApplication.currentScene + “_” + exportedObjects;<\/p>\n

int stripIndex = filename.LastIndexOf(‘\/’);\/\/FIXME: Should be Path.PathSeparator<\/p>\n

if (stripIndex >= 0)
\nfilename = filename.Substring(stripIndex + 1).Trim();<\/p>\n

MeshesToFile(mf, targetFolder, filename);<\/p>\n

EditorUtility.DisplayDialog(“Objects exported”, “Exported ” + exportedObjects + ” objects to ” + filename, “”);
\n}
\nelse
\nEditorUtility.DisplayDialog(“Objects not exported”, “Make sure at least some of your selected objects have mesh filters!”, “”);
\n}<\/p>\n

[MenuItem (“Custom\/Export\/Export each selected to single OBJ”)]
\nstatic void ExportEachSelectionToSingle()
\n{
\nif (!CreateTargetFolder())
\nreturn;<\/p>\n

Transform[] selection = Selection.GetTransforms(SelectionMode.Editable | SelectionMode.ExcludePrefab);<\/p>\n

if (selection.Length == 0)
\n{
\nEditorUtility.DisplayDialog(“No source object selected!”, “Please select one or more target objects”, “”);
\nreturn;
\n}<\/p>\n

int exportedObjects = 0;<\/p>\n

for (int i = 0; i < selection.Length; i++)
\n{
\nComponent[] meshfilter = selection[i].GetComponentsInChildren(typeof(MeshFilter));<\/p>\n

MeshFilter[] mf = new MeshFilter[meshfilter.Length];<\/p>\n

for (int m = 0; m < meshfilter.Length; m++)
\n{
\nexportedObjects++;
\nmf[m] = (MeshFilter)meshfilter[m];
\n}<\/p>\n

MeshesToFile(mf, targetFolder, selection[i].name + “_” + i);
\n}<\/p>\n

if (exportedObjects > 0)
\n{
\nEditorUtility.DisplayDialog(“Objects exported”, “Exported ” + exportedObjects + ” objects”, “”);
\n}
\nelse
\nEditorUtility.DisplayDialog(“Objects not exported”, “Make sure at least some of your selected objects have mesh filters!”, “”);
\n}<\/p>\n

}<\/p>\n

\u539f\u6587:http:\/\/wiki.unity3d.com\/index.php\/ObjExporter<\/a>
\n\u7531\u5c0f\u53ef\u7ffb\u8bd1,\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u6765\u81ea1vr.cn<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728Unity\u4e2d\u5efa\u7acb\u7684\u573a\u666f\u6587\u4ef6,\u6446\u653e\u7684\u6a21\u578b\u53ef\u4ee5\u7528\u4e0b\u5217\u811a\u672c\u5bfc\u51fa\u4e3aObj\u6a21\u578b\u6587\u4ef6,\u53ef\u4ee5\u4fdd\u6301\u573a\u666f\u4e2d\u6a21\u578b\u7684\u4f4d\u7f6e,\u8d34\u56fe\u706f\u4fe1 … Continue reading \u8f93\u51faUnity\u7684\u573a\u666f\u6587\u4ef6\u4e3aObj\u6a21\u578b\u6587\u4ef6<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-620","post","type-post","status-publish","format-standard","hentry","without-featured-image"],"_links":{"self":[{"href":"https:\/\/1vr.cn\/index.php?rest_route=\/wp\/v2\/posts\/620","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/1vr.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/1vr.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/1vr.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/1vr.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=620"}],"version-history":[{"count":3,"href":"https:\/\/1vr.cn\/index.php?rest_route=\/wp\/v2\/posts\/620\/revisions"}],"predecessor-version":[{"id":1342,"href":"https:\/\/1vr.cn\/index.php?rest_route=\/wp\/v2\/posts\/620\/revisions\/1342"}],"wp:attachment":[{"href":"https:\/\/1vr.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=620"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/1vr.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=620"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/1vr.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}