void death(double astr[][5], double shots[][5], double *x, double *y, int score[])
{
int i;
gfx_clear();
gfx_color(255, 0, 0);
for(i=0; i<10; i++){
gfx_flush();
gfx_color(255, 0, 0);
drawship(350, 350, 0, 0); //redraws ship and pauses to allow user time to recover
usleep(100000);
gfx_color(255, 255, 255);
drawship(350, 350, 0, 0);
usleep(100000);
}
gfx_flush();
*x=350;
*y=350;
score[1]=score[1]-1; //subtracts a life
initialize(astr); //resets astroids and shots
initialize(shots);
}
void flyship(void)
{
double x, y;
double theta;
char c;
int i, go, x1ship, x2ship, y1ship, y2ship;
int score[2];
score[0]=0;
score[1]=3;
char str[100];
go=0; //will tell drawship function if forward button is held down so flames can display
int iterate=0; //counts iterations of loop to determine when to move asteroids
x=350;
y=350; //initial conditions
theta=0;
//the 2d array roids will contain 32 elements, one for each potential asteroid
//and each element will have four numbers for the asteroids' properties
double astr[32][5];
double shots[32][5]; //2d array for the shots out of the ship and its properties
initialize(astr);
initialize(shots);
drawship(x, y, theta, go);
double speed=0;
while(1){
if(gfx_event_waiting()) {
c=gfx_wait();
if (score[1]==0 || c=='q') {
//this will run when lives are 0 and display the score
gfx_clear();
sprintf(str, "Score: %i Press q to exit game", score[0], score[1]);
gfx_text(250, 350, str);
c=gfx_wait();
if(c=='q'){
break;
}
}
if(c=='d'){
theta=theta-PI/20;
//this will rotate the ship
}
if(c=='a'){
theta=theta+PI/20;
}
if(c=='w'){
speed=speed+1; //moves ship forward
if (speed>5){
speed=5;
}
go=1; //will tell drawship function that ship is moving
}
if(c=='o') {
shoot(shots, theta, x, y);
}
if(x>700){
x=1;
} else if(x<0){
x=699;
} else if(y>700){ //this keeps the ship from flying off the screen
y=1;
} else if(y<0){
y=699;
}
}
gfx_clear();
usleep(10000);
x1ship= x+20*cos(theta+4*PI/3); //these variables create a sort of box around the ship, which is later used to check the ship's coordinates for collisions
y1ship= y;
x2ship= x+20*cos(theta+5*PI/3);
y2ship= y-20*sin(theta);
move_shots(shots);
destroy(astr, shots, score); //checks whether an asteroid should be destroyed
move_asteroids(astr, shots, x1ship, y1ship, x2ship, y2ship, &x, &y, &speed, &theta, score);
x=x+speed*cos(theta+PI/2); //iterates coordinates of ship based on changes to theta and speed
y=y-speed*sin(theta+PI/2);
drawship(x, y, theta, go);
if(go>=1){
go=go-1; //keeps go at 1 so it stops when stop pressing forward button
}
if(speed>.025){
speed=speed-.025;
}
iterate++;
sprintf(str, "Score: %d Lives: %d", score[0], score[1]);
gfx_text(20, 680, str);
}
}
int
main() {
int x;
char gravcount;
struct terrain *terrain;
terrain = loadterrain("TERRAIN.DAT");
if (terrain == NULL)
return (1);
if (loadship("SHIP.DAT") != 0)
return (1);
initgraph();
px = 160 * 16;
py = 9 * 16;
velx = 1;
vely = 0;
while (exitflag == 0) {
/* physics */
px += velx;
py += vely;
posx = px / 16;
posy = py / 16;
gravcount++;
/* gravity */
if (gravcount > 100) {
gravcount = 0;
vely++;
}
/* input */
scankb();
/* wrap around sides of screen */
if (posx < minx + 9)
px = (maxx - 9) * 16;
if (posx > maxx - 9)
px = (minx + 9) * 16;
/* prevent leaving the top of the screen */
if (posy < miny + 9) {
py = (miny + 9) * 16;
vely = 0;
}
/* terrain collision checking */
if (posy > maxy - terrain->data[posx] - 7)
crash();
if (posy > maxy - terrain->data[posx] - 6) {
for (x = -8; x <= 8; x++)
if (posy != maxy - terrain->data[posx + x] - 9)
if (crashflag == 0)
land();
}
/* swap frame buffer */
wtsync();
swap(virt, screen);
cleardevice(virt);
/* graphics */
drawship(posx, posy);
drawterrain(terrain);
}
setmode(0x0003);
return (0);
}
/* calculates and draws both the ships on the water grid. */
void drawAllShips(void)
{
drawship(mesh_1, &translateShip_1, &rotateShip_1, &scaleShip_1, colour.red);
drawship(mesh_2, &translateShip_2, &rotateShip_2, &scaleShip_2, colour.green);
}
