?? demo12_6_16b.cpp
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Destroy_BOB(&skelaton);
Destroy_BOB(&bat);
// shutdown directdraw last
DDraw_Shutdown();
// now directsound
DSound_Stop_All_Sounds();
DSound_Shutdown();
// shut down directinput
DInput_Shutdown();
// return success
return(1);
} // end Game_Shutdown
//////////////////////////////////////////////////////////
void Skelaton_AI(void)
{
// this function controls the ai of the skelaton and the pattern
// processing
// these are local defines to help compute the direction to move the
// skelaton if it needs to hunt down bat, note they are all in power
// of 2 order, hence, they are mutually exclusive
#define WEST_BIT 1
#define EAST_BIT 2
#define NORTH_BIT 4
#define SOUTH_BIT 8
// test if it's time to process a new instruction
if (curr_pattern==NULL)
{
// select a random pattern in pattern bank
skelaton_pattern_index = rand()%NUM_PATTERNS;
curr_pattern = patterns[skelaton_pattern_index];
// now reset instuction pointer
skelaton_ip = 0;
// reset counter
skelaton_counter = 0;
} // end if
// process next instruction if it's time
if (--skelaton_counter <= 0)
{
// get next instruction
opcode = curr_pattern[skelaton_ip++];
operand = curr_pattern[skelaton_ip++];
// test what the opcode is
switch(opcode)
{
case OPC_E:
{
// set direction to east
Set_Vel_BOB(&skelaton,3,0);
// set animation to east
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_NE:
{
// set direction to northeast
Set_Vel_BOB(&skelaton,3,-3);
// set animation to northeast
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_N:
{
// set direction to north
Set_Vel_BOB(&skelaton,0,-3);
// set animation to north
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_NW:
{
// set direction to northwest
Set_Vel_BOB(&skelaton,-3,-3);
// set animation to northwest
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_W:
{
// set direction to west
Set_Vel_BOB(&skelaton,-3,0);
// set animation to west
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_SW:
{
// set direction to southwest
Set_Vel_BOB(&skelaton,-3,3);
// set animation to southwest
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_S:
{
// set direction to south
Set_Vel_BOB(&skelaton,0,3);
// set animation to south
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_SE:
{
// set direction to southeast
Set_Vel_BOB(&skelaton,3,3);
// set animation to southeast
Set_Animation_BOB(&skelaton,opcode);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_STOP:
{
// stop motion
Set_Vel_BOB(&skelaton,0,0);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case OPC_RAND:
{
// set counter to instuction operand
skelaton_counter = 0;
} break;
case OPC_TEST_DIST:
{
// test distance between bat and skelaton
// if bat is too far, then move toward bat
int dx = (bat.x - skelaton.x);
int dy = (bat.y - skelaton.y);
// test distance against minimum lonelyness
if (sqrt((dx*dx) + (dy*dy)) > MIN_LONELYNESS)
{
// the skelaton needs to be pointed toward the bat (player)
// this is a bit hard because we need to point the skelaton
// in 1 of 8 directions, instead of just giving him a velocity
// to solve the problem well break it up into a dx and a dy and then
// use a look up table to set everything up right
DSound_Play(laugh_sound_id);
int direction = 0; // the bit encoded direction
// first east-west
if (bat.x > skelaton.x)
direction|=EAST_BIT;
else
if (bat.x < skelaton.x)
direction|=WEST_BIT;
// now north-south
if (bat.y > skelaton.y)
direction|=SOUTH_BIT;
else
if (bat.y < skelaton.y)
direction|=NORTH_BIT;
// test final direction, note this could be compressed into
// another look up table, but this is simpler
switch(direction)
{
case WEST_BIT:
{
// set motion
Set_Vel_BOB(&skelaton,-3,0);
// set animation
Set_Animation_BOB(&skelaton,OPC_W);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case EAST_BIT:
{
// set motion
Set_Vel_BOB(&skelaton,3,0);
// set animation
Set_Animation_BOB(&skelaton,OPC_E);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case NORTH_BIT:
{
// set motion
Set_Vel_BOB(&skelaton,0,-3);
// set animation
Set_Animation_BOB(&skelaton,OPC_N);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case SOUTH_BIT:
{
// set motion
Set_Vel_BOB(&skelaton,0,3);
// set animation
Set_Animation_BOB(&skelaton,OPC_S);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case (NORTH_BIT | WEST_BIT):
{
// set motion
Set_Vel_BOB(&skelaton,-3,-3);
// set animation
Set_Animation_BOB(&skelaton,OPC_NW);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case (NORTH_BIT | EAST_BIT):
{
// set motion
Set_Vel_BOB(&skelaton,3,-3);
// set animation
Set_Animation_BOB(&skelaton,OPC_NE);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case (SOUTH_BIT | WEST_BIT):
{
// set motion
Set_Vel_BOB(&skelaton,-3,3);
// set animation
Set_Animation_BOB(&skelaton,OPC_SW);
// set counter to instuction operand
skelaton_counter = operand;
} break;
case (SOUTH_BIT | EAST_BIT):
{
// set motion
Set_Vel_BOB(&skelaton,3,3);
// set animation
Set_Animation_BOB(&skelaton,OPC_SE);
// set counter to instuction operand
skelaton_counter = operand;
} break;
default: break;
} // end switch
} // end if
} break;
case OPC_END:
{
// stop motion
Set_Vel_BOB(&skelaton,0,0);
// select a random pattern in pattern bank
skelaton_pattern_index = rand()%NUM_PATTERNS;
curr_pattern = patterns[skelaton_pattern_index];
// now reset instuction pointer
skelaton_ip = 0;
// reset counter
skelaton_counter = 0;
} break;
default: break;
} // end switch
} // end if
// draw stats
sprintf(buffer,"Pattern #%d",skelaton_pattern_index);
Draw_Text_GDI(buffer,10, 400,RGB(0,255,0), lpddsback);
sprintf(buffer,"Opcode=%s Operand=%d",opcode_names[opcode],operand);
Draw_Text_GDI(buffer,10, 416,RGB(0,255,0), lpddsback);
sprintf(buffer,"Instruction Ptr=%d ", skelaton_ip);
Draw_Text_GDI(buffer,10, 432,RGB(0,255,0), lpddsback);
sprintf(buffer,"Counter=%d ", skelaton_counter);
Draw_Text_GDI(buffer,10, 448,RGB(0,255,0), lpddsback);
} // end skelaton_AI
//////////////////////////////////////////////////////////
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
// 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_Bitmap16(&background_bmp, back_buffer, back_lpitch,0);
// unlock back surface
DDraw_Unlock_Back_Surface();
// read keyboard
DInput_Read_Keyboard();
// do the ai on skelaton
Skelaton_AI();
// animate the bat
Animate_BOB(&bat);
// the animate the skelaton unless its stopped
if (opcode!=OPC_STOP)
Animate_BOB(&skelaton);
// move skelaton
Move_BOB(&skelaton);
// test if skelaton is off screen, if so wrap around
if (skelaton.x >= SCREEN_WIDTH)
skelaton.x = -skelaton.width;
else
if (skelaton.x < -skelaton.width)
skelaton.x = SCREEN_WIDTH;
if (skelaton.y >= SCREEN_HEIGHT)
skelaton.y = -skelaton.height;
else
if (skelaton.y < -skelaton.height)
skelaton.y = SCREEN_HEIGHT;
// let player move the bat
// allow player to move
if (keyboard_state[DIK_RIGHT])
bat.x+=4;
else
if (keyboard_state[DIK_LEFT])
bat.x-=4;
if (keyboard_state[DIK_UP])
bat.y-=4;
else
if (keyboard_state[DIK_DOWN])
bat.y+=4;
// test if bat is off screen, if so wrap around
if (bat.x >= SCREEN_WIDTH)
bat.x = -bat.width;
else
if (bat.x < -bat.width)
bat.x = SCREEN_WIDTH;
if (bat.y >= SCREEN_HEIGHT)
bat.y = -bat.height;
else
if (bat.y < -bat.height)
bat.y = SCREEN_HEIGHT;
// draw the skelaton
Draw_BOB(&skelaton, lpddsback);
// draw the bat
Draw_BOB16(&bat, lpddsback);
// draw title
Draw_Text_GDI("(16-Bit Version) Skelaton Pattern Demo With Tracking",10, 10,RGB(0,255,255), lpddsback);
// flip the surfaces
DDraw_Flip();
// sync to 30ish fps
Wait_Clock(30);
// 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();
} // end if
// return success
return(1);
} // end Game_Main
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