winmain.cpp

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/**************************************************
WinMain.cpp
Chapter 12 MeshLvl Demo

Programming Role-Playing Games with DirectX
by Jim Adams (01 Jan 2002)

Required libraries:
  D3D8.LIB, D3DX8.LIB, and DINPUT8.LIB
**************************************************/

#include "Core_Global.h"

class cApp : public cApplication
{
  private:
    cGraphics       m_Graphics;  // Graphics object
    cCamera         m_Camera;    // Camera

    cInput          m_Input;     // Input object
    cInputDevice    m_Keyboard;  // Keyboard device object
    cInputDevice    m_Mouse;     // Moues device object
    cMesh           m_RoomMeshes[2];  // Meshes
    cObject         m_RoomObjects[8]; // Objects

    float           m_XPos, m_ZPos;  // Viewpoint position

  public:
    cApp();

    BOOL Init();
    BOOL Shutdown();
    BOOL Frame();
};

cApp::cApp()
{
  m_Width  = 640;
  m_Height = 480;
  m_Style  = WS_BORDER|WS_CAPTION|WS_MINIMIZEBOX|WS_SYSMENU;
  strcpy(m_Class, "MeshLvlClass");
  strcpy(m_Caption, "MeshLvl Demo by Jim Adams");
}

BOOL cApp::Init()
{
  // Initialize the graphics device and set display mode
  m_Graphics.Init();
  m_Graphics.SetMode(GethWnd(), TRUE, TRUE);
  m_Graphics.SetPerspective(D3DX_PI/4,1.3333f,1.0f,10000.0f);
  ShowMouse(TRUE);

  // Initialize input and input devices
  m_Input.Init(GethWnd(), GethInst());
  m_Keyboard.Create(&m_Input, KEYBOARD);
  m_Mouse.Create(&m_Input, MOUSE, TRUE);

  // Load the room meshes
  m_RoomMeshes[0].Load(&m_Graphics, "..\\Data\\Corridor.x",   \
                                    "..\\Data\\");
  m_RoomMeshes[1].Load(&m_Graphics, "..\\Data\\Room.x",       \
                                    "..\\Data\\");

  // Setup the room objects
  m_RoomObjects[0].Create(&m_Graphics, &m_RoomMeshes[1]);
  m_RoomObjects[1].Create(&m_Graphics, &m_RoomMeshes[0]);
  m_RoomObjects[2].Create(&m_Graphics, &m_RoomMeshes[1]);
  m_RoomObjects[3].Create(&m_Graphics, &m_RoomMeshes[0]);
  m_RoomObjects[4].Create(&m_Graphics, &m_RoomMeshes[0]);
  m_RoomObjects[5].Create(&m_Graphics, &m_RoomMeshes[1]);
  m_RoomObjects[6].Create(&m_Graphics, &m_RoomMeshes[0]);
  m_RoomObjects[7].Create(&m_Graphics, &m_RoomMeshes[1]);

  // Move room objects into position
  m_RoomObjects[0].Move(-2000.0f, 0.0f,  2000.0f);
  m_RoomObjects[1].Move(    0.0f, 0.0f,  2000.0f);
  m_RoomObjects[2].Move( 2000.0f, 0.0f,  2000.0f);
  m_RoomObjects[3].Move(-2000.0f, 0.0f,     0.0f);
  m_RoomObjects[4].Move( 2000.0f, 0.0f,     0.0f);
  m_RoomObjects[5].Move(-2000.0f, 0.0f, -2000.0f);
  m_RoomObjects[6].Move(    0.0f, 0.0f, -2000.0f);
  m_RoomObjects[7].Move( 2000.0f, 0.0f, -2000.0f);

  // Rotate room objects into proper position
  m_RoomObjects[1].Rotate(0.0f,  1.57f, 0.0f);
  m_RoomObjects[2].Rotate(0.0f,  1.57f, 0.0f);
  m_RoomObjects[5].Rotate(0.0f, -1.57f, 0.0f);
  m_RoomObjects[6].Rotate(0.0f, -1.57f, 0.0f);
  m_RoomObjects[7].Rotate(0.0f,  3.14f, 0.0f);

  // Position view in a room
  m_XPos = -2000.0f;
  m_ZPos = -2000.0f;

  return TRUE;
}

BOOL cApp::Shutdown()
{
  // Free objects and meshes
  for(short i=0;i<8;i++)
    m_RoomObjects[i].Free();
  m_RoomMeshes[0].Free();
  m_RoomMeshes[1].Free();

  // Shutdown input
  m_Mouse.Free();
  m_Keyboard.Free();
  m_Input.Shutdown();

  // Shutdown graphics
  m_Graphics.Shutdown();

  return TRUE;
}

BOOL cApp::Frame()
{
  static DWORD  Timer = timeGetTime();
  unsigned long Elapsed;
  float         XMove, ZMove;
  short         i;

  // Calculate elapsed time (plus speed boost)
  Elapsed = (timeGetTime() - Timer) * 2;
  Timer = timeGetTime();

  // Get input
  m_Keyboard.Read();
  m_Mouse.Read();

  // Process input and update everything.
  // ESC quits program
  if(m_Keyboard.GetKeyState(KEY_ESC) == TRUE)
    return FALSE;

  // Process movement
  XMove = ZMove = 0.0f;

  // Process keyboard input to move view

  // Move viewpoint forward
  if(m_Keyboard.GetKeyState(KEY_UP) == TRUE) {
    XMove = (float)sin(m_Camera.GetYRotation()) * Elapsed;
    ZMove = (float)cos(m_Camera.GetYRotation()) * Elapsed;
  }

  // Move viewpoint backward
  if(m_Keyboard.GetKeyState(KEY_DOWN) == TRUE) {
    XMove = -(float)sin(m_Camera.GetYRotation()) * Elapsed;
    ZMove = -(float)cos(m_Camera.GetYRotation()) * Elapsed;
  }

  // Strafe left
  if(m_Keyboard.GetKeyState(KEY_LEFT) == TRUE) {
    XMove=(float)sin(m_Camera.GetYRotation()-1.57f)*Elapsed;
    ZMove=(float)cos(m_Camera.GetYRotation()-1.57f)*Elapsed;
  }

  // Strafe right
  if(m_Keyboard.GetKeyState(KEY_RIGHT) == TRUE) {
    XMove=(float)sin(m_Camera.GetYRotation()+1.57f)*Elapsed;
    ZMove=(float)cos(m_Camera.GetYRotation()+1.57f)*Elapsed;
  }

  // Update view coordinates
  m_XPos += XMove;
  m_ZPos += ZMove;

  // Position camera and rotate based on mouse position
  m_Camera.Move(m_XPos + XMove, 400.0f, m_ZPos + ZMove);
  m_Camera.RotateRel((float)m_Mouse.GetYDelta() / 200.0f,
                     (float)m_Mouse.GetXDelta() / 200.0f,
                     0.0f);

  // Set camera
  m_Graphics.SetCamera(&m_Camera);

  // Render everything
  m_Graphics.Clear(D3DCOLOR_RGBA(0,64,128,255));
  if(m_Graphics.BeginScene() == TRUE) {
    // Render each room
    for(i=0;i<8;i++)
      m_RoomObjects[i].Render();
    m_Graphics.EndScene();
  }
  m_Graphics.Display();

  return TRUE;
}

int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrev,          \
                   LPSTR szCmdLine, int nCmdShow)
{
  cApp App;
  return App.Run();
}