Создание игры(2d)

float angle=stalk.Polar(Mouse)/M_RAD_CONV;

float angle=stalk.Polar(&Mouse)/M_RAD_CONV;

".\\pointer.bmp"
".\\BG.bmp"
".\\Stalker.bmp"

GPoint stalk(StPosX+63,StPosY+57);
GPoint Mouse(MouseX,MouseY);
float angle=stalk.Polar(&Mouse)/M_RAD_CONV;
 
RotateDC(BG->Canvas->Handle,angle);
SetViewportOrgEx(BG->Canvas->Handle,StPosX+63,StPosY+57,NULL);
RotateDC(BG->Canvas->Handle,angle);
BG->Canvas->Draw(StPosX,StPosY,Stalker);
SetViewportOrgEx(BG->Canvas->Handle,0,0,NULL);
RotateDC(BG->Canvas->Handle,0);
 
Form1->Canvas->Draw(0,0,BG);   //И рисуем все на экран

void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
TPoint mp=Form1->ScreenToClient(Mouse->CursorPos);
int MouseX=mp.x;
int MouseY=mp.y;
BG->Canvas->Draw(0,0,CH);
//BG->Canvas->Draw(500,0,CH);
/*Canvas->Pen->Width = 1;
Canvas->Pen->Color = clBlack;  */
if (IsRightDown == true) {
   StPosX = StPosX+speed;
}
if (IsLeftDown == true) {
   StPosX = StPosX-speed;
}
if (IsDownDown == true) {
   StPosY = StPosY+speed;
}
if (IsUpDown == true) {
   StPosY = StPosY-speed;
}
GPoint stalk(StPosX,StPosY); //И тут смещения никакие не нужны, а просто координаты
GPoint Mouse(MouseX,MouseY);
float angle=stalk.Polar(&Mouse)/M_RAD_CONV;
 
RotateDC(BG->Canvas->Handle,angle);
SetViewportOrgEx(BG->Canvas->Handle,StPosX,StPosY,NULL);
BG->Canvas->Draw(-1*Stalker->Width/2,-1*Stalker->Height/2,Stalker);
SetViewportOrgEx(BG->Canvas->Handle,0,0,NULL);
RotateDC(BG->Canvas->Handle,0);
 
BG->Canvas->Draw(MouseX-15,MouseY-15,cross);//Курсор рисуем в конце
Form1->Canvas->Draw(0,0,BG);   //И рисуем все на экран
}

GPoint stalk(StPosX+63,StPosY+57);

GPoint stalk(StPosX,StPosY);