fore.cpp

来自「《24小时教会你游戏编程》上的源码」· C++ 代码 · 共 151 行

//-----------------------------------------------------------------
// Fore Application
// C++ Source - Fore.cpp
//-----------------------------------------------------------------

//-----------------------------------------------------------------
// Include Files
//-----------------------------------------------------------------
#include "Fore.h"

//-----------------------------------------------------------------
// Game Engine Functions
//-----------------------------------------------------------------
BOOL GameInitialize(HINSTANCE hInstance)
{
  // Create the game engine
  _pGame = new GameEngine(hInstance, TEXT("Fore"),
    TEXT("Fore"), IDI_FORE, IDI_FORE_SM, 600, 400);
  if (_pGame == NULL)
    return FALSE;
  
  // Set the frame rate
  _pGame->SetFrameRate(30);

  // Store the instance handle
  _hInstance = hInstance;

  return TRUE;
}

void GameStart(HWND hWindow)
{
  // Seed the random number generator
  srand(GetTickCount());

  // Create and load the bitmaps
  HDC hDC = GetDC(hWindow);
  _pForestBitmap = new Bitmap(hDC, IDB_FOREST, _hInstance);
  _pGolfBallBitmap = new Bitmap(hDC, IDB_GOLFBALL, _hInstance);

  // Create the golf ball sprites
  RECT rcBounds = { 0, 0, 600, 400 };
  _pGolfBallSprite[0] = new Sprite(_pGolfBallBitmap, rcBounds);
  _pGolfBallSprite[1] = new Sprite(_pGolfBallBitmap, rcBounds, BA_WRAP);
  _pGolfBallSprite[2] = new Sprite(_pGolfBallBitmap, rcBounds, BA_BOUNCE);
  _pGolfBallSprite[0]->SetVelocity(2, 1);
  _pGolfBallSprite[1]->SetVelocity(3, -2);
  _pGolfBallSprite[2]->SetVelocity(7, 4);

  // Set the initial drag info
  _bDragging = FALSE;
  _iDragBall = -1;
}

void GameEnd()
{
  // Cleanup the bitmaps
  delete _pForestBitmap;
  delete _pGolfBallBitmap;

  // Cleanup the sprites
  for (int i = 0; i < 3; i++)
    delete _pGolfBallSprite[i];

  // Cleanup the game engine
  delete _pGame;
}

void GameActivate(HWND hWindow)
{
}

void GameDeactivate(HWND hWindow)
{
}

void GamePaint(HDC hDC)
{
  // Draw the background forest
  _pForestBitmap->Draw(hDC, 0, 0);

  // Draw the golf ball sprites
  for (int i = 0; i < 3; i++)
    _pGolfBallSprite[i]->Draw(hDC);
}

void GameCycle()
{
  // Update the golf ball sprites
  for (int i = 0; i < 3; i++)
    _pGolfBallSprite[i]->Update();

  // Force a repaint to redraw the golf balls
  InvalidateRect(_pGame->GetWindow(), NULL, FALSE);
}

void HandleKeys()
{
}

void MouseButtonDown(int x, int y, BOOL bLeft)
{
  // See if a ball was clicked with the left mouse button
  if (bLeft && !_bDragging)
  {
    for (int i = 0; i < 3; i++)
      if (_pGolfBallSprite[i]->IsPointInside(x, y))
      {
        // Capture the mouse
        SetCapture(_pGame->GetWindow());

        // Set the drag state and the drag ball
        _bDragging = TRUE;
        _iDragBall = i;

        // Simulate a mouse move to get started
        MouseMove(x, y);

        // Don't check for more balls
        break;
      }
  }
}

void MouseButtonUp(int x, int y, BOOL bLeft)
{
  // Release the mouse
  ReleaseCapture();

  // Stop dragging
  _bDragging = FALSE;
}

void MouseMove(int x, int y)
{
  if (_bDragging)
  {
    // Move the sprite to the mouse cursor position
    _pGolfBallSprite[_iDragBall]->SetPosition(
      x - (_pGolfBallBitmap->GetWidth() / 2),
      y - (_pGolfBallBitmap->GetHeight() / 2));

    // Force a repaint to redraw the golf balls
    InvalidateRect(_pGame->GetWindow(), NULL, FALSE);
  }
}

void HandleJoystick(JOYSTATE jsJoystickState)
{
}