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C-/C++-Quelltext

CMath *vec:
vec = new CVector2D();

((CVector2D*)vec)->add(1, 2);

C-/C++-Quelltext

//----vector2d.h


#ifdef _WINDLL
#   define ENGINE_API __declspec(dllexport)
#else
#   define ENGINE_API __declspec(dllimport)
#endif


struct ENGINE_API  vector2d{
   float x;
   float y;

   vector2d(){};
   vector2d(float a, float b){x = a; y = b;};
   vector2d &operator +=(vector2d &b){
       x += b.x;
       y += b.y;
       return *this;
   };

   vector2d  operator +(vector2d &b)const{
       return vector2d(x + b.x, y + b.y);
   };

   //is eigentl. ueberfluessig

   vector2d &operator =(vector2d &b){
      x = b.x; y = b.y;
      return *this;
   };

   vector2d &add(vector2d &b){
      x += b.x;
      y += b.y;
      return *this;
   };
};

//---main.cpp


#include <iostream>
#include "vector2d.h"
#pragma comment(lib, "enginedll.lib")

int main(){
   using namespace std;
   vector2d va(1, 2), vb(3, 4);
   vector2d *res;
   
   //damit auch ein new drin is :)

   res = new vector2d();
   (*res) = va + vb;

   //sollte "result: 4, 6" ausspucken

   cout<<"result: "<<res->x<<", "<<res->y<<endl;

   (*res) = vector2d(1, 2);
   res->add(va);

   //sollte "result: 2, 4" ausspucken

   cout<<"result: "<<res->x<<", "<<res->y<<endl;

   delete res;
   return 0;
}

C-/C++-Quelltext

class ENGINE_API baseShader{
private:
protected:
public:
 virtual bool loadFromFile(const char *) = 0;
 virtual bool setFConstant(float *, uint) = 0;
 //...etc.

};

class ENGINE_API vertexShader:public baseShader{
public:
   bool loadFromFile(const char *){//...};

   bool setFConstant(float *f, uint size){

      return SUCCEEDED(device->SetVertexShaderConstantF(f, size));
   };
};

class ENGINE_API pixelShader:public baseShader{
public:
   bool loadFromFile(const char *){//...};

   bool setFConstant(float *f, uint size){

      return SUCCEEDED(device->SetPixelShaderConstantF(f, size));
   };
};