void Snake::detectCrash()
{
QCanvasSprite* head = snakelist.first();
QCanvasItem* item;
QCanvasItemList l=head->collisions(FALSE);
for (QCanvasItemList::Iterator it=l.begin(); it!=l.end(); ++it) {
item = *it;
// check if snake hit target
if ( (item->rtti()== 1500 ) && (item->collidesWith(head)) ) {
Target* target = (Target*) item;
target->done();
emit targethit();
extendSnake();
setScore(5);
return;
}
// check if snake hit obstacles
if ( (item->rtti()==1600) && (item->collidesWith(head)) ) {
emit dead();
autoMoveTimer->stop();
return;
}
}
//check if snake hit itself
for (uint i = 3; i < snakelist.count(); i++) {
if (head->collidesWith(snakelist.at(i)) ) {
emit dead();
autoMoveTimer->stop();
return;
}
}
//check if snake hit edge
if ( (head->x() > canvas->width()-5) || (head->y() > canvas->height()-10)
|| (head->x() <2) || (head->y() <-5) ) {
emit dead();
autoMoveTimer->stop();
return;
}
}
void Bullet::checkCollision()
{
QCanvasItem* item;
QCanvasItemList l=collisions(FALSE);
for (QCanvasItemList::Iterator it=l.begin(); it!=l.end(); ++it) {
item = *it;
if ( (item->rtti()== 1500) && (item->collidesWith(this)) ) {
Man* deadman = (Man*)item;
if (deadman->frame() != 5) return;
deadman->done();
emit score(10);
setShotCount(shotcount+1);
setAnimated(false);
nobullets--;
delete this;
return;
}
else if ( (item->rtti()==1900) && (item->collidesWith(this)) ) {
Helicopter* deadchopper = (Helicopter*) item;
deadchopper->done();
emit score(50);
setAnimated(false);
nobullets--;
delete this;
return;
}
}
//check shot is not out of bounds
if ( (y() < 0) || (x() < 0) ||
(y() > canvas()->height()) ||
( x() > canvas()->width())) {
setAnimated(false);
nobullets--;
delete this;
return;
}
}
void BouncyLogo::advance(int stage)
{
switch ( stage ) {
case 0: {
double vx = xVelocity();
double vy = yVelocity();
if ( vx == 0.0 && vy == 0.0 ) {
// stopped last turn
initSpeed();
vx = xVelocity();
vy = yVelocity();
}
double nx = x() + vx;
double ny = y() + vy;
if ( nx < 0 || nx >= canvas()->width() )
vx = -vx; // 換反方向
if ( ny < 0 || ny >= canvas()->height() )
vy = -vy; // 換反方向
for (int bounce=0; bounce<4; bounce++) {
QCanvasItemList l=collisions(FALSE); // 沒有那麼精準的傳回所有有碰撞的canvas item
for (QCanvasItemList::Iterator it=l.begin(); it!=l.end(); ++it) {
QCanvasItem *hit = *it;
if ( hit->rtti()==logo_rtti && hit->collidesWith(this) ) {
switch ( bounce ) {
case 0:
vx = -vx;
break;
case 1:
vy = -vy;
vx = -vx;
break;
case 2:
vx = -vx;
break;
case 3:
// Stop for this turn
vx = 0;
vy = 0;
break;
}
setVelocity(vx,vy);
break;
}
}
}
if ( x()+vx < 0 || x()+vx >= canvas()->width() )
vx = 0;
if ( y()+vy < 0 || y()+vy >= canvas()->height() )
vy = 0;
setVelocity(vx,vy);
} break;
case 1:
QCanvasItem::advance(stage);
break;
}
}