Update developer.rst

source/developer/developer.rst

@@ -18,8 +18,8 @@ General
 In this chapter you will learn how to write your own importers. You just need to implement the #Assimp::BaseImporter class,
 which defines a few abstract methods, register your loader, test it carefully and provide test models for it.
 
-* Create a header (*FormatNameImporter.h*) and a unit ( **FormatNameImporter.cpp** ) in the **<root>/code/AssetLib/** directory
-* Add them to the following workspaces: vc8 and vc9 (the files are in the workspaces directory), CMAKE (code/CMakeLists.txt, create a new source group for your importer and put them also to ADD_LIBRARY( assimp SHARED))
+* Create a header-file **FormatNameImporter.h** and a cpp-unit ( **FormatNameImporter.cpp** ) in the **<root>/code/AssetLib/** directory
+* Add them to the following workspaces: CMAKE (code/CMakeLists.txt, create a new source group for your importer and put them also to ADD_LIBRARY( assimp SHARED))
 * Include *AssimpPCH.h* - this is the PCH file, and it includes already most Assimp-internal stuff.
 * Open ImporterRegistry.cpp.cpp and include your header just below the *(include_new_importers_here)* line, guarded by a #define
 
@@ -40,10 +40,38 @@ Wrap the same guard around your .cpp!
     DefaultLogger::create("AssimpLog.txt",Logger::VERBOSE)
 
 * Implement the **Assimp::BaseImporter::CanRead()** : here the format detection will be perfoormed. You can detect the format by its extension or by parsing some token of the file content
-* Implement **Assimp::BaseImporter::InternReadFile()** : Here you have to parse the file fomat and convert it into a aiScene-Instance.
+* Implement **Assimp::BaseImporter::InternReadFile()** : Here you have to parse the file fomat and convert it into a aiScene-Instance:
 * Implement **Assimp::BaseImporter::GetExtensionList()** : here you have to add the provided extensions (for the Wavefront-Files add .obj for instance).
 * For error handling, throw a dynamic allocated **ImportErrorException** (see Appendix A) for critical errors, and log errors, warnings, infos and debuginfos
   with **DefaultLogger::get()->[error, warn, debug, info]**.
+* Here an example:
+
+::
+
+    class MyyImporter : public BaseImporter {
+    public:
+        MyyImporter() : BaseImporter {}
+        
+        MyyImporter() override {}
+        
+        bool CanRead(const std::string &filename, IOSystem *pIOHandler, bool checkSig) const override {
+            if (checkSig) {
+                // Check the signature and return result
+            } else {
+                const std::string extension = GetExtension(filename));
+                if ( extension == "myExt) {
+                    return true;
+                }
+            }
+            return false;
+        }
+            
+        void InternReadFile()       {}
+        
+    };
+
+::
+
 * Make sure that your loader compiles against all build configurations on all supported platforms. You can use our CI-build to check several platforms 
   like Windows and Linux ( 32 bit and 64 bit ).
 * Provide some _free_ test models in <root>/test/models/<FormatName> and credit their authors.