demoii12_3.cpp

3D游戏编程大师技巧第十二章的源代码

DMusic_Init();

// hide the mouse
if (!WINDOWED_APP)
    ShowCursor(FALSE);

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

Open_Error_File("ERROR.TXT");

// initialize math engine
Build_Sin_Cos_Tables();

// initialize the camera with 90 FOV, normalized coordinates
Init_CAM4DV1(&cam,      // the camera object
             CAM_MODEL_EULER, // the euler model
             &cam_pos,  // initial camera position
             &cam_dir,  // initial camera angles
             &cam_target,      // no target
             10.0,        // near and far clipping planes
             12000.0,
             120.0,      // field of view in degrees
             WINDOW_WIDTH,   // size of final screen viewport
             WINDOW_HEIGHT);
 
// set a scaling vector
VECTOR4D_INITXYZ(&vscale,50.00,50.00,50.00); 

// load all the objects in
for (int index_obj=0; index_obj < NUM_OBJECTS; index_obj++)
    {
    Load_OBJECT4DV2_COB2(&obj_array[index_obj], object_filenames[index_obj],  
                        &vscale, &vpos, &vrot, VERTEX_FLAGS_SWAP_YZ  | 
                                               VERTEX_FLAGS_TRANSFORM_LOCAL 
                                               /* VERTEX_FLAGS_TRANSFORM_LOCAL_WORLD*/,0 );

    } // end for index_obj

// position the scenery objects randomly
for (index = 0; index < NUM_SCENE_OBJECTS; index++)
    {
    // randomly position object
    scene_objects[index].x = RAND_RANGE(-UNIVERSE_RADIUS, UNIVERSE_RADIUS);
    scene_objects[index].y = RAND_RANGE(-(UNIVERSE_RADIUS/2), (UNIVERSE_RADIUS/2));
    scene_objects[index].z = RAND_RANGE(-UNIVERSE_RADIUS, UNIVERSE_RADIUS);

    // select random object, use w to store value
    scene_objects[index].w = RAND_RANGE(0,NUM_OBJECTS-1);
    } // end for


// select random velocities
for (index = 0; index < NUM_SCENE_OBJECTS; index++)
    {
    // randomly position object
    scene_objects_vel[index].x = RAND_RANGE(-MAX_VEL, MAX_VEL);
    scene_objects_vel[index].y = RAND_RANGE(-MAX_VEL, MAX_VEL);
    scene_objects_vel[index].z = RAND_RANGE(-MAX_VEL, MAX_VEL);
    } // end for

// set up lights
Reset_Lights_LIGHTV2(lights2, MAX_LIGHTS);

// create some working colors
white.rgba = _RGBA32BIT(255,255,255,0);
gray.rgba  = _RGBA32BIT(150,150,150,0);
black.rgba = _RGBA32BIT(0,0,0,0);
red.rgba   = _RGBA32BIT(255,0,0,0);
green.rgba = _RGBA32BIT(0,255,0,0);
blue.rgba  = _RGBA32BIT(0,0,255,0);

// ambient light
Init_Light_LIGHTV2(lights2,               // array of lights to work with
                   AMBIENT_LIGHT_INDEX,   
                   LIGHTV2_STATE_ON,      // turn the light on
                   LIGHTV2_ATTR_AMBIENT,  // ambient light type
                   gray, black, black,    // color for ambient term only
                   NULL, NULL,            // no need for pos or dir
                   0,0,0,                 // no need for attenuation
                   0,0,0);                // spotlight info NA

VECTOR4D dlight_dir = {-1,0,-1,1}; 

// directional light
Init_Light_LIGHTV2(lights2,               // array of lights to work with
                   INFINITE_LIGHT_INDEX,  
                   LIGHTV2_STATE_ON,      // turn the light on
                   LIGHTV2_ATTR_INFINITE, // infinite light type
                   black, gray, black,    // color for diffuse term only
                   NULL, &dlight_dir,     // need direction only
                   0,0,0,                 // no need for attenuation
                   0,0,0);                // spotlight info NA


VECTOR4D plight_pos = {0,200,0,1};

// point light
Init_Light_LIGHTV2(lights2,               // array of lights to work with
                   POINT_LIGHT_INDEX,
                   LIGHTV2_STATE_ON,      // turn the light on
                   LIGHTV2_ATTR_POINT,    // pointlight type
                   black, green, black,    // color for diffuse term only
                   &plight_pos, NULL,     // need pos only
                   0,.002,0,              // linear attenuation only
                   0,0,1);                // spotlight info NA


VECTOR4D slight2_pos = {0,1000,0,1};
VECTOR4D slight2_dir = {-1,0,-1,1};

// spot light2
Init_Light_LIGHTV2(lights2,                  // array of lights to work with
                   SPOT_LIGHT2_INDEX,
                   LIGHTV2_STATE_ON,         // turn the light on
                   LIGHTV2_ATTR_SPOTLIGHT2,  // spot light type 2
                   black, red, black,        // color for diffuse term only
                   &slight2_pos, &slight2_dir, // need pos only
                   0,.001,0,                 // linear attenuation only
                   0,0,1);    


// create lookup for lighting engine
RGB_16_8_IndexedRGB_Table_Builder(DD_PIXEL_FORMAT565,  // format we want to build table for
                                  palette,             // source palette
                                  rgblookup);          // lookup table

// create the z buffer
Create_Zbuffer(&zbuffer,
               WINDOW_WIDTH,
               WINDOW_HEIGHT,
               ZBUFFER_ATTR_32BIT);

// build alpha lookup table
RGB_Alpha_Table_Builder(NUM_ALPHA_LEVELS, rgb_alpha_table);


// load in the background
Create_BOB(&background, 0,0,800,600,1, BOB_ATTR_VISIBLE | BOB_ATTR_SINGLE_FRAME, DDSCAPS_SYSTEMMEMORY, 0, 16); 
Load_Bitmap_File(&bitmap16bit, "checkerboard800.bmp");
Load_Frame_BOB16(&background, &bitmap16bit,0,0,0,BITMAP_EXTRACT_MODE_ABS);
Unload_Bitmap_File(&bitmap16bit);

// return success
return(1);

} // end Game_Init

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

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

// shut everything down

// release all your resources created for the game here....

// now directsound
DSound_Stop_All_Sounds();
DSound_Delete_All_Sounds();
DSound_Shutdown();

// directmusic
DMusic_Delete_All_MIDI();
DMusic_Shutdown();

// shut down directinput
DInput_Release_Keyboard();

// shutdown directinput
DInput_Shutdown();

// shutdown directdraw last
DDraw_Shutdown();

Close_Error_File();

Delete_Zbuffer(&zbuffer);

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

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

int Game_Main(void *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!

static MATRIX4X4 mrot;   // general rotation matrix

static float plight_ang = 0, 
             slight_ang = 0; // angles for light motion

static float alpha_override = 0,
             alpha_inc = .25;

// use these to rotate objects
static float x_ang = 0, y_ang = 0, z_ang = 0;

// state variables for different rendering modes and help
static int wireframe_mode = 1;
static int backface_mode  = 1;
static int lighting_mode  = 1;
static int help_mode      = 1;
static int zsort_mode     = 1;
static int x_clip_mode    = 1;
static int y_clip_mode    = 1;
static int z_clip_mode    = 1;
static int z_buffer_mode  = 1;
static int display_mode   = 1;
static float turning      = 0;

char work_string[256]; // temp string

int index; // looping var

// start the timing clock
Start_Clock();

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

// draw the sky
//Draw_Rectangle(0,0, WINDOW_WIDTH, WINDOW_HEIGHT, RGB16Bit(0,0,0), lpddsback);
lpddsback->Blt(NULL, background.images[0], NULL, DDBLT_WAIT, NULL); 

// draw the ground
//Draw_Rectangle(0,WINDOW_HEIGHT*.5, WINDOW_WIDTH, WINDOW_HEIGHT, RGB16Bit(190,190,230), lpddsback);

// read keyboard and other devices here
DInput_Read_Keyboard();

// game logic here...

// reset the render list
Reset_RENDERLIST4DV2(&rend_list);

// modes and lights

// wireframe mode
if (keyboard_state[DIK_W]) 
   {
   // toggle wireframe mode
   if (++wireframe_mode > 1)
       wireframe_mode=0;
   Wait_Clock(100); // wait, so keyboard doesn't bounce
   } // end if

// backface removal
if (keyboard_state[DIK_B])
   {
   // toggle backface removal
   backface_mode = -backface_mode;
   Wait_Clock(100); // wait, so keyboard doesn't bounce
   } // end if

// lighting
if (keyboard_state[DIK_L])
   {
   // toggle lighting engine completely
   lighting_mode = -lighting_mode;
   Wait_Clock(100); // wait, so keyboard doesn't bounce
   } // end if

// toggle ambient light
if (keyboard_state[DIK_A])
   {
   // toggle ambient light
   if (lights2[AMBIENT_LIGHT_INDEX].state == LIGHTV2_STATE_ON)
      lights2[AMBIENT_LIGHT_INDEX].state = LIGHTV2_STATE_OFF;
   else
      lights2[AMBIENT_LIGHT_INDEX].state = LIGHTV2_STATE_ON;

   Wait_Clock(100); // wait, so keyboard doesn't bounce
   } // end if

// toggle infinite light
if (keyboard_state[DIK_I])
   {
   // toggle ambient light
   if (lights2[INFINITE_LIGHT_INDEX].state == LIGHTV2_STATE_ON)
      lights2[INFINITE_LIGHT_INDEX].state = LIGHTV2_STATE_OFF;
   else
      lights2[INFINITE_LIGHT_INDEX].state = LIGHTV2_STATE_ON;

   Wait_Clock(100); // wait, so keyboard doesn't bounce
   } // end if

// toggle point light
if (keyboard_state[DIK_P])
   {
   // toggle point light
   if (lights2[POINT_LIGHT_INDEX].state == LIGHTV2_STATE_ON)
      lights2[POINT_LIGHT_INDEX].state = LIGHTV2_STATE_OFF;
   else
      lights2[POINT_LIGHT_INDEX].state = LIGHTV2_STATE_ON;

   Wait_Clock(100); // wait, so keyboard doesn't bounce
   } // end if


// toggle spot light
if (keyboard_state[DIK_S])
   {
   // toggle spot light
   if (lights2[SPOT_LIGHT2_INDEX].state == LIGHTV2_STATE_ON)
      lights2[SPOT_LIGHT2_INDEX].state = LIGHTV2_STATE_OFF;
   else
      lights2[SPOT_LIGHT2_INDEX].state = LIGHTV2_STATE_ON;

   Wait_Clock(100); // wait, so keyboard doesn't bounce
   } // end if