/**
* Called by the assembler initialization routines, should not be called directly.
*/
void InitConsole(void){
#if INTRO_LOGO ==1
InitMusicPlayer(initPatches);
SetTileTable(uzeboxlogo);
SetFontTable(uzeboxlogo);
//draw logo
ClearVram();
WaitVsync(15);
TriggerFx(0,0xff,true);
DrawMap(LOGO_X_POS,12,map_uzeboxlogo);
WaitVsync(3);
DrawMap(LOGO_X_POS,12,map_uzeboxlogo2);
WaitVsync(2);
DrawMap(LOGO_X_POS,12,map_uzeboxlogo);
WaitVsync(40);
ClearVram();
WaitVsync(20);
#endif
}
int main()
{
unsigned char x,corner;
unsigned char frames;
unsigned int joypad;
unsigned char player_x, player_y;
unsigned char exit_x=0, exit_y=0;
unsigned int z=0;
int ay,ax,j;
SetFontTable(fonts); // this tells Print___() commands what font to use
ClearVram(); // clears out display memory (like a 'clear screen')
//DDRD &= 0xF7; // These are used by the "power" switch and LED on the "Gamer" baseboard that
//PORTD|= 0x08; // is paired with the AVCore. The 'power' button is used to switch mazes for now.
new_maze:
for(ay=0; ay<Y_SIZE; ay++)
{
for(ax=0; ax<X_SIZE; ax++)
if(ax>0 && ay>0 && ax<X_SIZE-1 && ay<Y_SIZE-1) // fills the maze with walls, that are then 'drilled' out
maze[ay][ax]=WALL;
else
maze[ay][ax]=BLANK;
}
ay=2; // 2,2 is the top left corner of the maze
ax=2;
maze[ay][ax]=4; // starting state for the maze generator
do
{
while(drill(&ay,&ax,(int)(rand()&0x03))) {} // start drilling things out (using random)
j=maze[ay][ax]; // note that the first time the game runs, the maze will always be
maze[ay][ax]=BLANK; // the same because of the random number generator always starting
if(j<4) // in the same state. (Normally I will 'sum' the contents of RAM
{ // on power-up to make a random seed, but I don't know how to mess
/* back-track */ // with WinAVR's C-startup yet.)
ax=ax-2*dx[j];
ay=ay-2*dy[j];
}
} while(j<4);
do{ // This generates a random position inside the maze to start the
do player_x=rand(); // player. Seems more interesting than a corner.
while ((player_x>=X_SIZE-1)||(player_x<=1));
do player_y=rand();
while ((player_y>=Y_SIZE-1)||(player_y<=1));
}
while (maze[player_y][player_x]==WALL); // (repeats until it picks a random spot that's not a wall)
maze[player_y][player_x]=PLAYER; // place the player in the maze
do // here we choose a random number from 0-3, representing one of the
{ // four corners of the maze.
corner=rand()&0x03;
switch (corner)
{
case 0:
exit_x=2; exit_y=2; break;
case 1:
exit_x=X_SIZE-3; exit_y=2; break;
case 2:
exit_x=X_SIZE-3; exit_y=Y_SIZE-3;break;
case 3:
exit_x=2; exit_y=Y_SIZE-3; break;
}
}
while (abs(player_x-exit_x)<16); // we compare the distance from the player to the exit (horizontally)
// and only accept the corner if it's relatively far away from the player
// (could use both x and y distance for better effect)
maze[exit_y][exit_x]=EXIT; // place the exit in the maze
redraw(); // draw the screen for the player
// This is what happens when you turn a static demo into a 'game'
// For a real game, you probably don't want to do this, but it works here and is simple...
//while(PIND&0x04) // if the button on the Gamer Baseboard isn't pressed
while(ReadPowerSwitch()==0) // if the button on the Gamer Baseboard isn't pressed
{z++; // the z counter is used later on for a seed for the random number generator (user interaction = randomness)
joypad=ReadJoypad(0); // get the joypad state
WaitVsync(1); // this waits a frame and essentially slows the gameplay down
frames++; // frame counter can be used for animations (later)
if (joypad&0xff) // if the D-pad has a bit or more pressed
{
maze[player_y][player_x]=BLANK; // erase the old player position
if (joypad&BTN_DOWN) // down?
if (maze[player_y+1][player_x]!=WALL) // don't move if a wall is blocking your path
player_y++; // you could 'switch/case' these with breaks to easily disable diagonal moves...
if (joypad&BTN_UP) // up?
if (maze[player_y-1][player_x]!=WALL)
player_y--;
if (joypad&BTN_LEFT) // left?
if (maze[player_y][player_x-1]!=WALL)
player_x--;
if (joypad&BTN_RIGHT) // right
if (maze[player_y][player_x+1]!=WALL)
player_x++;
if (maze[player_y][player_x]==EXIT) // if the new position is the EXIT, you just won
{
maze[exit_y][exit_x]=PLAYER; // place the player on top of the exit
redraw(); // draw the screen for the user
Print(14,25,strWin); // prints the "YOU ESCAPED!" message
WaitVsync(30); // and waits for a while.
for (x=14;x<26;x++) // this loops over the "YOU ESCAPED!" message
SetTile(x,25,11); // and erases it.
break; // this breaks out of the while(PIND...) loop, causing a new maze to be generated
}
maze[player_y][player_x]=PLAYER; // after the movement calculations, put the player in the new spot
}
else
{
// check for idle time // use the frame counter to make the player graphic change if you wait around. ;-)
}
srand(z); // our player-influenced 'z' value is now used to reseed the random number generator, resulting in a 'new' maze
redraw(); // redraw the screen to update new player position
}
goto new_maze; // this is just a hack to go do everything over again. Before anyone lectures me about using GOTO, think about
// why every CPU has a 'jump/goto' instruction in its assembly language and uses it-- frequently. :-)
}
