int Game_Main(void *parms = NULL, int num_parms = 0)
{
// this is the main loop of the game, do all your processing
// here
// make sure this isn't executed again
if (window_closed)
return(0);
// for now test if user is hitting ESC and send WM_CLOSE
if (KEYDOWN(VK_ESCAPE))
{
PostMessage(main_window_handle,WM_CLOSE,0,0);
window_closed = 1;
} // end if
// clear out the back buffer
DDraw_Fill_Surface(lpddsback, 0);
// lock primary buffer
DDRAW_INIT_STRUCT(ddsd);
if (FAILED(lpddsback->Lock(NULL,&ddsd,
DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR,
NULL)))
return(0);
// do the graphics
Draw_Polygon2D(&asteroid, (UCHAR *)ddsd.lpSurface, ddsd.lPitch);
// test for scale
if (KEYDOWN('A')) // scale up
Scale_Polygon2D(&asteroid, 1.1, 1.1);
else
if (KEYDOWN('S')) // scale down
Scale_Polygon2D(&asteroid, 0.9, 0.9);
// rotate the polygon by 5 degrees
Rotate_Polygon2D(&asteroid, 5);
// unlock primary buffer
if (FAILED(lpddsback->Unlock(NULL)))
return(0);
// perform the flip
while (FAILED(lpddsprimary->Flip(NULL, DDFLIP_WAIT)));
// wait a sec
Sleep(33);
// return success or failure or your own return code here
return(1);
} // end Game_Main
int Game_Main(void *parms = NULL, int num_parms = 0)
{
// this is the main loop of the game, do all your processing
// here
// make sure this isn't executed again
if (window_closed)
return(0);
// for now test if user is hitting ESC and send WM_CLOSE
if (KEYDOWN(VK_ESCAPE))
{
PostMessage(main_window_handle,WM_CLOSE,0,0);
window_closed = 1;
} // end if
// clear out the back buffer
DDraw_Fill_Surface(lpddsback, 0);
// lock primary buffer
DDRAW_INIT_STRUCT(ddsd);
if (FAILED(lpddsback->Lock(NULL,&ddsd,
DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR,
NULL)))
return(0);
// draw all the asteroids
for (int curr_index = 0; curr_index < NUM_ASTEROIDS; curr_index++)
{
// do the graphics
Draw_Polygon2D(&asteroids[curr_index], (UCHAR *)ddsd.lpSurface, ddsd.lPitch);
// move the asteroid
Translate_Polygon2D(&asteroids[curr_index],
asteroids[curr_index].xv,
asteroids[curr_index].yv);
// rotate the polygon by 5 degrees
Rotate_Polygon2D(&asteroids[curr_index], 5);
// test for out of bounds
if (asteroids[curr_index].x0 > SCREEN_WIDTH+100)
asteroids[curr_index].x0 = - 100;
if (asteroids[curr_index].y0 > SCREEN_HEIGHT+100)
asteroids[curr_index].y0 = - 100;
if (asteroids[curr_index].x0 < -100)
asteroids[curr_index].x0 = SCREEN_WIDTH+100;
if (asteroids[curr_index].y0 < -100)
asteroids[curr_index].y0 = SCREEN_HEIGHT+100;
} // end for curr_asteroid
// unlock primary buffer
if (FAILED(lpddsback->Unlock(NULL)))
return(0);
// perform the flip
while (FAILED(lpddsprimary->Flip(NULL, DDFLIP_WAIT)));
// wait a sec
Sleep(33);
// return success or failure or your own return code here
return(1);
} // end Game_Main
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!
int index; // looping var
static int curr_angle = 0; // current angle of elevation from horizon
static float curr_vel = 10; // current velocity of projectile
// start the timing clock
Start_Clock();
// clear the drawing surface
//DDraw_Fill_Surface(lpddsback, 0);
// lock back buffer and copy background into it
DDraw_Lock_Back_Surface();
// draw background
Draw_Bitmap(&background_bmp, back_buffer, back_lpitch,0);
// do the graphics
Draw_Polygon2D(&cannon, back_buffer, back_lpitch);
// unlock back surface
DDraw_Unlock_Back_Surface();
// read keyboard
DInput_Read_Keyboard();
// test for rotate
if ((curr_angle < 90) && keyboard_state[DIK_UP]) // rotate left
{
Rotate_Polygon2D_Mat(&cannon, -5);
curr_angle+=5;
} // end if
else
if ((curr_angle > 0) &&keyboard_state[DIK_DOWN]) // rotate right
{
Rotate_Polygon2D_Mat(&cannon, 5);
curr_angle-=5;
} // end if
// test for projectile velocity
if (keyboard_state[DIK_RIGHT])
{
if (curr_vel < 30) curr_vel+=0.1;
} // end if
else
if (keyboard_state[DIK_LEFT])
{
if (curr_vel > 0) curr_vel-=0.1;
} // end if
// test for wind force
if (keyboard_state[DIK_W])
{
if (wind_force < 2) wind_force+=0.01;
} // end if
else
if (keyboard_state[DIK_E])
{
if (wind_force > -2) wind_force-=0.01;
} // end if
// test for gravity force
if (keyboard_state[DIK_G])
{
if (gravity_force < 15) gravity_force+=0.1;
} // end if
else
if (keyboard_state[DIK_B])
{
if (gravity_force > -15) gravity_force-=0.1;
} // end if
// test for fire!
if (keyboard_state[DIK_LCONTROL])
{
Fire_Projectile(curr_angle, curr_vel);
} // end fire
// move all the projectiles
Move_Projectiles();
// draw the projectiles
Draw_Projectiles();
// draw the title
Draw_Text_GDI("Trajectory DEMO, Press <ESC> to Exit.",10, 10,RGB(255,255,255), lpddsback);
Draw_Text_GDI("<RIGHT>, <LEFT> to adjust velocity, <UP>, <DOWN> to adjust angle",10, 25, RGB(255,255,255), lpddsback);
Draw_Text_GDI("<G>, <B> to adjust gravity, <W>, <E> to adjust wind, <CTRL> to fire.",10, 40, RGB(255,255,255), lpddsback);
sprintf(buffer, "Ang=%d, Vel=%f", curr_angle, curr_vel);
Draw_Text_GDI(buffer,10, 60, RGB(255,255,255), lpddsback);
sprintf(buffer, "Wind force=%f, Gravity Force=%f", wind_force, gravity_force);
Draw_Text_GDI(buffer,10, 75, RGB(255,255,255), lpddsback);
// flip the surfaces
DDraw_Flip();
// sync to 30 fps = 1/30sec = 33 ms
Wait_Clock(33);
// check of user is trying to exit
if (KEY_DOWN(VK_ESCAPE) || keyboard_state[DIK_ESCAPE])
{
PostMessage(main_window_handle, WM_DESTROY,0,0);
// stop all sounds
DSound_Stop_All_Sounds();
// do a screen transition
Screen_Transitions(SCREEN_DARKNESS,NULL,0);
} // end if
// return success
return(1);
} // end Game_Main
