void Snake::moveSnake()
{
switch (last)
{
case Key_Up: move(up); break;
case Key_Left: move(left); break;
case Key_Right: move(right); break;
case Key_Down: move(down); break;
}
detectCrash();
}
void Snake::move(SpriteDB::Direction newdir)
{
// Add a new segment in the same place as the head
QAnimatedPixmapItem* sprite = new QAnimatedPixmapItem(SpriteDB::spriteCache(), scene );
sprite->setFrame(SpriteDB::snakeBody(currentdir, newdir));
sprite->setPos(snakelist.first()->x(), snakelist.first()->y() );
sprite->show();
snakelist.insert(1, sprite);
// Move the head to its new position
int x = 0;
int y = 0;
switch (newdir) {
case SpriteDB::right: x = SpriteDB::tileSize(); break;
case SpriteDB::left: x = -SpriteDB::tileSize(); break;
case SpriteDB::down: y = SpriteDB::tileSize(); break;
case SpriteDB::up: y = -SpriteDB::tileSize(); break;
}
snakelist.first()->moveBy(x, y);
// Make sure the head is pointing in the right direction
if (currentdir != newdir) {
currentdir = newdir;
snakelist.first()->setFrame(SpriteDB::snakeHead(currentdir));
}
// Move the tail along unless the snake is growing
if (grow <= 0) {
// Remove the tail (deleting it automatically removes it from the scene).
delete snakelist.takeLast();
// Change the new last segment to the tail image with correct direction
QAnimatedPixmapItem * last = snakelist.last();
QAnimatedPixmapItem * prev = snakelist[snakelist.size()-2];
SpriteDB::Direction taildir;
if ( prev->x() == last->x() ) { //vertical
taildir = prev->y() > last->y() ? SpriteDB::down : SpriteDB::up;
} else { //horizontal
taildir = prev->x() > last->x() ? SpriteDB::left : SpriteDB::right;
}
snakelist.last()->setFrame(SpriteDB::snakeTail(taildir));
}
else
grow--;
// Redraw the scene
scene->update();
// Decide if the snake collided with a wall or mouse
detectCrash();
}