added framework to figure out the input and output filenames and load the input file into an Assimp scene object

AssimpToMesh/AssimpToMesh.vcxproj

@@ -81,6 +81,10 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="src\main.cpp" />
+    <ClCompile Include="src\utils\fileutils.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="src\utils\utils.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

AssimpToMesh/AssimpToMesh.vcxproj.filters

@@ -18,5 +18,13 @@
     <ClCompile Include="src\main.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\utils\fileutils.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="src\utils\utils.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>

AssimpToMesh/src/main.cpp

@@ -1,7 +1,50 @@
 #include <stdio.h>
+#include <string>
+#include <exception>
+
+#include <assimp.hpp>
+#include <aiScene.h>
+#include <aiPostProcess.h>
+
+#include "utils/utils.h"
 
 int main(int argc, char *argv[])
 {
-	printf("Hello world!\n");
+	printf("ASSIMP-to-MESH Converter.\n");
+
+	if (argc == 1)
+	{
+		printf("Usage: assimptomesh.exe [inputfile]\n\n");
+		return 0;
+	}
+
+	std::string file = argv[1];
+	std::string outputFile = GetMeshFilenameFromInput(file);
+
+	if (outputFile.length() == 0)
+	{
+		printf("Unable to determine output mesh filename from the input file name.\n\n");
+		return 1;
+	}
+
+	printf("Input file: %s\n", file.c_str());
+	printf("Output file: %s\n", outputFile.c_str());
+
+	Assimp::Importer importer;
+	const aiScene *scene = importer.ReadFile(file,
+		aiProcess_JoinIdenticalVertices | 
+		aiProcess_Triangulate | 
+		aiProcess_RemoveRedundantMaterials | 
+		aiProcess_SortByPType | 
+		aiProcess_OptimizeMeshes | 
+		aiProcess_OptimizeGraph
+		);
+
+	if (!scene)
+	{
+		printf("Failed to load input file: %s\n\n", importer.GetErrorString());
+		return 1;
+	}
+
 	return 0;
 }

AssimpToMesh/src/utils/fileutils.cpp

@@ -0,0 +1,18 @@
+#include "utils.h"
+
+#include <stdio.h>
+
+std::string GetMeshFilenameFromInput(const std::string &filename)
+{
+	std::string meshFilename = "";
+
+	// strip off the existing extension, and replace it with ".mesh"
+	size_t extStart = filename.find_last_of('.');
+	if (extStart != std::string::npos)
+	{
+		meshFilename = filename.substr(0, extStart);
+		meshFilename += ".mesh";
+	}
+
+	return meshFilename;
+}

AssimpToMesh/src/utils/utils.h

@@ -0,0 +1,8 @@
+#ifndef __UTILS_UTILS_H_INCLUDED__
+#define __UTILS_UTILS_H_INCLUDED__
+
+#include <string>
+
+std::string GetMeshFilenameFromInput(const std::string &filename);
+
+#endif