demo9_4.cpp

windows游戏编程大师源代码

// this function is where you do all the initialization 
// for your game

int index;         // looping var
char filename[80]; // used to build up files names

// initialize directdraw
DDraw_Init(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP);

// joystick creation section ////////////////////////////////

// first create the direct input object
if (DirectInputCreate(main_instance,DIRECTINPUT_VERSION,&lpdi,NULL)!=DI_OK)
   return(0);

// first find the fucking GUID of your particular joystick
lpdi->EnumDevices(DIDEVTYPE_JOYSTICK, 
                  DI_Enum_Joysticks, 
                  &joystickGUID, 
                  DIEDFL_ATTACHEDONLY | DIEDFL_FORCEFEEDBACK); 

if (lpdi->CreateDevice(joystickGUID, &lpdijoy, NULL)!=DI_OK)
   return(0);

// now that we have created the joystick device we need to
// obtain a new more advanced interface called 
// IDIRECTINPUTDEVICE2, this needs to be done using the low level
// COM method queryinterface(), unfortunetely createdevice
// still gives a 1.0 version interface, so we to do this manually

lpdijoy->QueryInterface(IID_IDirectInputDevice2, 
                        (void **) &lpdijoy2); 

// release the version 1.0 interface since we have converted
// it to 2.0
lpdijoy->Release();

// set cooperation level
if (lpdijoy2->SetCooperativeLevel(main_window_handle, 
	                 DISCL_EXCLUSIVE | DISCL_BACKGROUND)!=DI_OK)
   return(0);

// set data format
if (lpdijoy2->SetDataFormat(&c_dfDIJoystick2)!=DI_OK)
   return(0);

// set the range of the joystick
DIPROPRANGE joy_axis_range;

// first x axis
joy_axis_range.lMin = -32;
joy_axis_range.lMax = 32;

joy_axis_range.diph.dwSize       = sizeof(DIPROPRANGE); 
joy_axis_range.diph.dwHeaderSize = sizeof(DIPROPHEADER); 
joy_axis_range.diph.dwObj        = DIJOFS_X;
joy_axis_range.diph.dwHow        = DIPH_BYOFFSET;

lpdijoy2->SetProperty(DIPROP_RANGE,&joy_axis_range.diph);

// now y-axis
joy_axis_range.lMin = -32;
joy_axis_range.lMax = 32;

joy_axis_range.diph.dwSize       = sizeof(DIPROPRANGE); 
joy_axis_range.diph.dwHeaderSize = sizeof(DIPROPHEADER); 
joy_axis_range.diph.dwObj        = DIJOFS_Y;
joy_axis_range.diph.dwHow        = DIPH_BYOFFSET;

lpdijoy2->SetProperty(DIPROP_RANGE,&joy_axis_range.diph);

// and now the dead band

DIPROPDWORD dead_band; // here's our property word

dead_band.diph.dwSize       = sizeof(dead_band);
dead_band.diph.dwHeaderSize = sizeof(dead_band.diph);
dead_band.diph.dwObj        = DIJOFS_X;
dead_band.diph.dwHow        = DIPH_BYOFFSET;

// 4 will be used on both sides of the range +/-
dead_band.dwData            = 1000;

// finally set the property
lpdijoy2->SetProperty(DIPROP_DEADZONE,&dead_band.diph);

dead_band.diph.dwSize       = sizeof(dead_band);
dead_band.diph.dwHeaderSize = sizeof(dead_band.diph);
dead_band.diph.dwObj        = DIJOFS_Y;
dead_band.diph.dwHow        = DIPH_BYOFFSET;

// 4 will be used on both sides of the range +/-
dead_band.dwData            = 1000;

// finally set the property
lpdijoy2->SetProperty(DIPROP_DEADZONE,&dead_band.diph);


// acquire the joystick
if (lpdijoy2->Acquire()!=DI_OK)
   return(0);


// force feedback setup
DWORD      dwAxes[2] = { DIJOFS_X, DIJOFS_Y };
LONG       lDirection[2] = { 0, 0 };


DIPERIODIC diPeriodic;      // type-specific parameters
DIENVELOPE diEnvelope;      // envelope
DIEFFECT   diEffect;        // general parameters

// setup the periodic structure
diPeriodic.dwMagnitude = DI_FFNOMINALMAX; 
diPeriodic.lOffset = 0; 
diPeriodic.dwPhase = 0; 
diPeriodic.dwPeriod = (DWORD) (0.05 * DI_SECONDS); 

// set the modulation envelope 
diEnvelope.dwSize = sizeof(DIENVELOPE);
diEnvelope.dwAttackLevel = 0; 
diEnvelope.dwAttackTime = (DWORD) (0.01 * DI_SECONDS); 
diEnvelope.dwFadeLevel = 0; 
diEnvelope.dwFadeTime = (DWORD) (3.0 * DI_SECONDS); 
 
// set up the effect structure itself
diEffect.dwSize = sizeof(DIEFFECT); 
diEffect.dwFlags = DIEFF_POLAR | DIEFF_OBJECTOFFSETS; 
diEffect.dwDuration = (DWORD) INFINITE; // (1 * DI_SECONDS);
 
// set up details of effect
diEffect.dwSamplePeriod = 0;               // = default 
diEffect.dwGain = DI_FFNOMINALMAX;         // no scaling
diEffect.dwTriggerButton = DIJOFS_BUTTON0; // connect effect to trigger button
diEffect.dwTriggerRepeatInterval = 0;      
diEffect.cAxes = 2; 
diEffect.rgdwAxes = dwAxes; 
diEffect.rglDirection = &lDirection[0]; 
diEffect.lpEnvelope = &diEnvelope; 
diEffect.cbTypeSpecificParams = sizeof(diPeriodic);
diEffect.lpvTypeSpecificParams = &diPeriodic;  
 
// create the effect and get the interface to it 
lpdijoy2->CreateEffect(GUID_Square,  // standard GUID 
                     &diEffect,      // where the data is
                     &lpdieffect,    // where to put interface pointer
                     NULL);          // no aggregation


///////////////////////////////////////////////////////////

// load the background
Load_Bitmap_File(&bitmap8bit, "MUSH.BMP");

// set the palette to background image palette
Set_Palette(bitmap8bit.palette);

// load in the four frames of the mushroom
for (index=0; index<4; index++)
    {
    // create mushroom bitmaps
    Create_Bitmap(&mushrooms[index],0,0,32,32);
    Load_Image_Bitmap(&mushrooms[index],&bitmap8bit,index,0,BITMAP_EXTRACT_MODE_CELL);  
    } // end for index

// now create the bug blaster bob
Create_BOB(&blaster,0,0,32,32,3,
           BOB_ATTR_VISIBLE | BOB_ATTR_MULTI_ANIM | BOB_ATTR_ANIM_ONE_SHOT,
           DDSCAPS_SYSTEMMEMORY);

// load in the four frames of the mushroom
for (index=0; index<3; index++)
     Load_Frame_BOB(&blaster,&bitmap8bit,index,index,1,BITMAP_EXTRACT_MODE_CELL);  

// unload the bitmap file
Unload_Bitmap_File(&bitmap8bit);

// set the animation sequences for bug blaster
Load_Animation_BOB(&blaster,0,5,blaster_anim);

// set up stating state of bug blaster
Set_Pos_BOB(&blaster,320, 400);
Set_Anim_Speed_BOB(&blaster,3);

// set clipping rectangle to screen extents so objects dont
// mess up at edges
RECT screen_rect = {0,0,screen_width,screen_height};
lpddclipper = DDraw_Attach_Clipper(lpddsback,1,&screen_rect);

// create mushroom playfield bitmap
Create_Bitmap(&playfield,0,0,SCREEN_WIDTH,SCREEN_HEIGHT);
playfield.attr |= BITMAP_ATTR_LOADED;

// fill in the background
Load_Bitmap_File(&bitmap8bit, "GRASS.BMP");

// load the grass bitmap image
Load_Image_Bitmap(&playfield,&bitmap8bit,0,0,BITMAP_EXTRACT_MODE_ABS);
Unload_Bitmap_File(&bitmap8bit);

// seed random number generator
srand(Start_Clock());

// create the random mushroom patch
for (index=0; index<50; index++)
    {
    // select a mushroom
    int mush = rand()%4;

    // set mushroom to random position
    mushrooms[mush].x = rand()%(SCREEN_WIDTH-32);
    mushrooms[mush].y = rand()%(SCREEN_HEIGHT-128);

    // now draw the mushroom into playfield
    Draw_Bitmap(&mushrooms[mush], playfield.buffer, playfield.width,1);

    } // end for

// hide the mouse
ShowCursor(FALSE);

// return success
return(1);

} // end Game_Init

///////////////////////////////////////////////////////////

int Game_Shutdown(void *parms,  int num_parms)
{
// this function is where you shutdown your game and
// release all resources that you allocated

// kill the bug blaster
Destroy_BOB(&blaster);

// kill the mushroom maker
for (int index=0; index<4; index++)
    Destroy_Bitmap(&mushrooms[index]);

// kill the playfield bitmap
Destroy_Bitmap(&playfield);

// release joystick
lpdijoy2->Unacquire();
lpdijoy2->Release();
lpdi->Release();

// shutdonw directdraw
DDraw_Shutdown();

// return success
return(1);
} // end Game_Shutdown

///////////////////////////////////////////////////////////

int Game_Main(void *parms, int num_parms)
{
// this is the workhorse of your game it will be called
// continuously in real-time this is like main() in C
// all the calls for you game go here!

int          index;             // looping var
int          dx,dy;             // general deltas used in collision detection


// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || KEY_DOWN(VK_SPACE))
    PostMessage(main_window_handle, WM_DESTROY,0,0);

// start the timing clock
Start_Clock();

// clear the drawing surface
DDraw_Fill_Surface(lpddsback, 0);

// get joystick data
lpdijoy2->Poll(); // this is needed for joysticks only
lpdijoy2->GetDeviceState(sizeof(DIJOYSTATE2), (LPVOID)&joy_state);

// lock the back buffer
DDraw_Lock_Back_Surface();

// draw the background reactor image
Draw_Bitmap(&playfield, back_buffer, back_lpitch, 0);

// unlock the back buffer
DDraw_Unlock_Back_Surface();

// is the player moving?
blaster.x+=joy_state.lX;
blaster.y+=joy_state.lY;

// test bounds
if (blaster.x > SCREEN_WIDTH-32)
    blaster.x = SCREEN_WIDTH-32;
else
if (blaster.x < 0)
    blaster.x = 0;

if (blaster.y > SCREEN_HEIGHT-32)
    blaster.y = SCREEN_HEIGHT-32;
else
if (blaster.y < SCREEN_HEIGHT-128)
    blaster.y = SCREEN_HEIGHT-128;

// is player firing?
if (joy_state.rgbButtons[0])
   Start_Missile();

// move and draw missle
Move_Missile();
Draw_Missile();

// is it time to blink eyes
if ((rand()%100)==50)
   Set_Animation_BOB(&blaster,0);

// draw blaster
Animate_BOB(&blaster);
Draw_BOB(&blaster,lpddsback);

// draw some text
Draw_Text_GDI("Let's Rock!!!",0,0,RGB(255,255,255),lpddsback);

// display joystick and buttons 0-7
sprintf(buffer,"Joystick Stats: X-Axis=%d, Y-Axis=%d, buttons(%d,%d,%d,%d,%d,%d,%d,%d)",
                                                                      joy_state.lX,joy_state.lY,
                                                                      joy_state.rgbButtons[0],
                                                                      joy_state.rgbButtons[1],
                                                                      joy_state.rgbButtons[2],
                                                                      joy_state.rgbButtons[3],
                                                                      joy_state.rgbButtons[4],
                                                                      joy_state.rgbButtons[5],
                                                                      joy_state.rgbButtons[6],
                                                                      joy_state.rgbButtons[7]);

Draw_Text_GDI(buffer,0,SCREEN_HEIGHT-20,RGB(255,255,50),lpddsback);

// print out name of joystick
sprintf(buffer, "Joystick Name & Vendor: %s",joyname);
Draw_Text_GDI(buffer,0,SCREEN_HEIGHT-40,RGB(255,255,50),lpddsback);


// flip the surfaces
DDraw_Flip();

// sync to 30 fps
Wait_Clock(30);

// return success
return(1);

} // end Game_Main

//////////////////////////////////////////////////////////