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diff --git a/src/mesh/assimp-master/tools/assimp_cmd/Export.cpp b/src/mesh/assimp-master/tools/assimp_cmd/Export.cpp
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+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+ copyright notice, this list of conditions and the
+ following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the
+ following disclaimer in the documentation and/or other
+ materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+ contributors may be used to endorse or promote products
+ derived from this software without specific prior
+ written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Export.cpp
+ * @brief Implementation of the 'assimp export' utility
+ */
+
+#include "Main.h"
+#include <assimp/ParsingUtils.h>
+#include <assimp/StringUtils.h>
+
+#ifndef ASSIMP_BUILD_NO_EXPORT
+
+const char *AICMD_MSG_EXPORT_HELP_E =
+ "assimp export <model> [<out>] [-f<h>] [common parameters]\n"
+ "\t -f<h> Specify the file format. If omitted, the output format is \n"
+ "\t\tderived from the file extension of the given output file \n"
+ "\t[See the assimp_cmd docs for a full list of all common parameters] \n";
+
+// -----------------------------------------------------------------------------------
+size_t GetMatchingFormat(const std::string &outf, bool byext = false) {
+ for (size_t i = 0, end = globalExporter->GetExportFormatCount(); i < end; ++i) {
+ const aiExportFormatDesc *const e = globalExporter->GetExportFormatDescription(i);
+ if (outf == (byext ? e->fileExtension : e->id)) {
+ return i;
+ }
+ }
+ return SIZE_MAX;
+}
+
+// -----------------------------------------------------------------------------------
+int Assimp_Export(const char *const *params, unsigned int num) {
+ const char *const invalid = "assimp export: Invalid number of arguments. See \'assimp export --help\'\n";
+ if (num < 1) {
+ printf(invalid);
+ return AssimpCmdError::InvalidNumberOfArguments;
+ }
+
+ // --help
+ if (!strcmp(params[0], "-h") || !strcmp(params[0], "--help") || !strcmp(params[0], "-?")) {
+ printf("%s", AICMD_MSG_EXPORT_HELP_E);
+ return AssimpCmdError::Success;
+ }
+
+ std::string in = std::string(params[0]);
+ std::string out = (num > 1 ? std::string(params[1]) : "-"), outext;
+
+ //
+ const std::string::size_type s = out.find_last_of('.');
+ if (s != std::string::npos) {
+ outext = out.substr(s + 1);
+ out = out.substr(0, s);
+ }
+
+ // get import flags
+ ImportData import;
+ ProcessStandardArguments(import, params + 1, num - 1);
+
+ // process other flags
+ std::string outf = "";
+ for (unsigned int i = (out[0] == '-' ? 1 : 2); i < num; ++i) {
+ if (!params[i]) {
+ continue;
+ }
+ if (!strncmp(params[i], "-f", 2)) {
+ if (strncmp(params[i], "-fi", 3))
+ outf = std::string(params[i] + 2);
+ } else if (!strncmp(params[i], "--format=", 9)) {
+ outf = std::string(params[i] + 9);
+ }
+ }
+
+ std::transform(outf.begin(), outf.end(), outf.begin(), ai_tolower<char>);
+
+ // convert the output format to a format id
+ size_t outfi = GetMatchingFormat(outf);
+ if (outfi == SIZE_MAX) {
+ if (outf.length()) {
+ printf("assimp export: warning, format id \'%s\' is unknown\n", outf.c_str());
+ }
+
+ // retry to see if we know it as file extension
+ outfi = GetMatchingFormat(outf, true);
+ if (outfi == SIZE_MAX) {
+ // retry to see if we know the file extension of the output file
+ outfi = GetMatchingFormat(outext, true);
+
+ if (outfi == SIZE_MAX) {
+ // still no match -> failure
+ printf("assimp export: no output format specified and I failed to guess it\n");
+ return -23;
+ }
+ } else {
+ outext = outf;
+ }
+ }
+
+ // if no output file is specified, take the file name from input file
+ if (out[0] == '-') {
+ std::string::size_type pos = in.find_last_of('.');
+ if (pos == std::string::npos) {
+ pos = in.length();
+ }
+
+ out = in.substr(0, pos);
+ }
+
+ const aiExportFormatDesc *const e = globalExporter->GetExportFormatDescription(outfi);
+ printf("assimp export: select file format: \'%s\' (%s)\n", e->id, e->description);
+
+ // import the model
+ const aiScene *scene = ImportModel(import, in);
+ if (!scene) {
+ return AssimpCmdExportError::FailedToImportModel;
+ }
+
+ // derive the final file name
+ out += "." + outext;
+
+ // and call the export routine
+ if (!ExportModel(scene, import, out, e->id)) {
+ return AssimpCmdExportError::FailedToExportModel;
+ }
+ printf("assimp export: wrote output file: %s\n", out.c_str());
+ return AssimpCmdError::Success;
+}
+
+#endif // no export