How to make a new physical engine の変更点

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[[How to make a new physical engine]]

All the descriptions of the class,
need parentheses for 
 namespace Spr{;
 }
.(#include doesn't care)。」~
The macro to register the name is necessary in the place of the declaration of 
the class.
 SGOBJECTDEF(PHTestEngine);
This can specify like the above.
This is needed #include because this is declared by <FileIO/FIDocScene.h>.
+Specification of macro that registers the derivation relation in the .cpp file of the class.
 SGOBJECTIMP(PHTestEngine, SGBehaviorEngine);
+Creating of member function in PHTestEngine class
At least, necessary one is Step(SGScene *s).~
+Creating of loader and saver.
Those below minimum necessary declaration.(to write it in .cpp is convenient)
 class PHTestEngineLoader:public FIObjectLoader<PHTestEngine>{
 public:
	PHTestEngineLoader(){}
	virtual bool LoadData(FILoadScene* ctx, PHTestEngine* test){}
 };
 class PHTestEngineSaver:public FIObjectSaver<PHTestEngine>{
	virtual UTString GetType() const{ return "PHTestEngine"; }
	virtual void SaveData(FISaveScene* ctx, FIDocNodeBase* doc, PHTestEngine* test){}
 };
+Macro which register the loader and saver specify after the declaration~
 DEF_REGISTER_BOTH(PHTestEngine);
In order to using the argument here, the name must adjust to declaration.
+The data read with .X file is defined.(The data such as Solid is described after)
~The definition is different the method in the next two cases. 
-When the data of X file pairs with the member variable maintained in the classュ。
-When the member variable maintained in the class and data of X file is another 
wayュ「~
In the case ュ。,define it before the variable of the member(For example, before the declaration of the class). In the case ュ「, be the declaration of the loader.
 DEF_RECORD(XTestEngine,{
         //In the code area; specify codes generated by ~\Microsoft Visual Studio\Common\Tools\GUIDGEN.EXE 
	GUID Guid(){ return WBGuid("CODE"); } 
	Data declaration;
 });
Because data declaration should be a data type matched to X file,
 typedef Vec3f	Vector;

it is necessary to match the type like that.
+The definition of data is registered by the loader.
The registers is performed the constructor of the loader.
 UTRef<FITypeDescDb> db = new FITypeDescDb;
 db->SetPrefix("X");
 db->REG_FIELD(Vector);  //Matched Declare type
 db->REG_RECORD_PROTO(XTestEngine); //adjust it to the first argument of DEF_RECORD
+Data is substituted for the member variable.The content of the member variable is substituted for data.~
In the case ュ。,
 XTestEngine tes;
the member variable is described like above.~
In the case ュ「,the member variable is described as I am necessary.~
It substitutes it by member function LoadData() of the loader.
In the case ュ。,
 virtual bool LoadData(FILoadScene* ctx, PHMTestEngine* test){
	ctx->docs.Top()->GetWholeData(test->tes);
	return true;
 }
When you substitute it for data inversely,
 virtual void SaveData(FISaveScene* ctx, FIDocNodeBase* doc, PHTestEngine* test){
	doc->SetWholeData(test->tes);
 }
In the case ュ「,
 virtual bool LoadData(FILoadScene* ctx, PHMTestEngine* test){
	XTestEngine tes;
	ctx->docs.Top()->GetWholeData(test->tes);
	substitute it for the member variable in your original type 
	return true;
 }
When you substitute it for data inversely,
 virtual void SaveData(FISaveScene* ctx, FIDocNodeBase* doc, PHTestEngine* test){
	XTestEngine tes;
	substitute it for the above structure in your original type 
	doc->SetWholeData(test->tes);
 }
+Data such as Solid is substituted for the member variable.~
Use AddChildObject(SGObject* o, SGScene* s).~
This is declared as a member function of the PHtestEngine class.Use(method) is the following.
  if (DCAST([Class name of data], o)){
		[Member Var. of this Class].push_back((PHSolid*)o);
		return true;
 }
	return false;
+At the end, the class that added it to PHRegisterLoader.cpp is registered(the registration method is just like other classes).