Game Development Reference
In-Depth Information
//change height of next block
blockHeight =
_blockHeights[_currentHeightIndex];
//if difference too high, decrease it
if (blockHeight - _lastBlockHeight > 2 &&
_gapSize == 2)
{
blockHeight = 1;
}
} else {
blockHeight = _lastBlockHeight;
}
_currentHeightIndex++;
if (_currentHeightIndex == _blockHeights.size()) {
_currentHeightIndex = 0;
random_shuffle(_blockHeights.begin(),
_blockHeights.end());
}
block->setupBlock (blockWidth, blockHeight, type);
_lastBlockWidth = blockWidth;
_lastBlockHeight = blockHeight;
Notice how we reshuffle the arrays once we are done iterating through them
(
random_shuffle
).
We use
_lastBlockHeight
to apply an extra condition to our terrain. We
don't want the next block to be too tall in relation to the previous building, at least
not in the beginning of the game, which we can determine by checking the value
for
_gapSize
, which is only increased when the game gets harder.
And if the value from
_blockHeights
is
0
, we don't change the height of the
new building and use instead the same value from
_lastBlockHeight
.
5. We finish by updating the count in the current series of buildings to determine
whether we should show a gap next, or not:
