void Display()
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-640,640,-500,500,-2000,2000);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(cameraCenterx,cameraCentery,cameraCenterz,640,350,200,0,1,0);
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glTranslated(0,0,cannonStep);
DrawCannon();
glPopMatrix();
glFlush();
}
int main (void)
{
const double YS_PI=3.1415927;
FsOpenWindow(16, 16, 800, 600, 1);
int ObstaclesState[5];
int x1[5], y1[5], x2[5], y2[5];
int Point[10000];//trajectory
int p[10000],q[10000];//trajectory
srand((unsigned)time(NULL));
// for(int i=0;i<10000;i++)
// {
// Point[i]=1;
// }//draw points
for(int i=0;i<5;++i)
{
x1[i]=rand()%720;
y1[i]=rand()%520;
x2[i]=x1[i]+80+rand()%70;
y2[i]=y1[i]+80+rand()%70;
ObstaclesState[i]=1;
}
int terminate=0;
int y=0;
int x=30;
int a=55;
int b=545;
double m=1.0;
double dt=0.025;
int CannonballState=0;
int angle=30;
double vx;
double vy;
int Hit=0;
int TargetState=1;
while(0==terminate)
{
FsPollDevice();
angle++;
if(angle>=90) angle=0;
int key=FsInkey();
if(FSKEY_ESC==key)
{
terminate=1;
}
else if(FSKEY_SPACE==key)
{
if(0==CannonballState)
{
CannonballState=1;
vx=cos(angle*YS_PI/180)*400;
vy=-sin(angle*YS_PI/180)*400;
}
}
//draw screen
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
if(0!=ObstaclesState)
{
for(int i=0; i<5; ++i)
{
if(0!=ObstaclesState[i])
{
DrawObstacles(x1[i],y1[i],x2[i],y2[i]);
if(0!=CannonballState && 0!=CheckCollision(a, b, x1[i], y1[i], x2[i], y2[i]))
{
printf("Hit An Obstacle!\n");
ObstaclesState[i]=0;
CannonballState=0;
Hit=1;
a=55;
b=545;
}
}
if(0!=Hit)
{
DrawObstacles2(x1[i],y1[i],x2[i],y2[i]);
}
}
}
if(0!=TargetState)
{
if(0!=CannonballState && 0!=CheckHit(a, b, y))
{
printf("HitTarget!\n");
TargetState=0;
CannonballState=0;
break;
}
}
DrawCannonLine(x);
RotateCannonline(x, 90);
DrawCannon();
DrawTarget(y);
MoveTarget(y, 600);
if(0!=CannonballState)
{
DrawCannonball(a, b);
MoveCannonball(a, b, vx, vy, m, dt);
// for(int i=0;i<10000;i++)
// {
// Point[i]=1;
// }//draw points
// if(0!=Point)//not working
// {
for(int i=0; i<10000; ++i)
{
// if(0!=Point[i])
// {
p[i]=a;
// printf("%d\n",a);
q[i]=b;
// DrawTrajectory(p[i], q[i]);
/// }
// }
}
if(a>800||b>600)
{
CannonballState=0;
a=55;
b=545;
}
}
FsSwapBuffers();
FsSleep(25);
}
return 0;
}
