protected IRoundItem CreateStep()
{
MemoflowConfiguration nBackConfig = (MemoflowConfiguration)ExerciseConfiguration;
int numCards = nBackConfig.Levels[CurrentDifficulty].NumCards;
double rnd = _random.NextDouble();
MemoflowStepVO step = _questQueue[_questQueue.Count - numCards + 1] as MemoflowStepVO;
if (rnd < nBackConfig.MatchProbability)
{
var validMatches = GetValidMatches();
MemoflowMatchType newMatch = validMatches[_random.Next(0, validMatches.Length)];
return(CreateStepWithMatch(step as MemoflowStepVO, newMatch));
}
else
{
return(CreateStepWithMatch(step as MemoflowStepVO, MemoflowMatchType.NO));
}
}
protected virtual MemoflowStepVO CreateStepWithMatch(MemoflowStepVO nbs, MemoflowMatchType matchType)
{
MemoflowConfiguration memoflowConfig = (MemoflowConfiguration)ExerciseConfiguration;
//create completely different step...
int symbol = GetUniqueElement(_availableSymbols, nbs.SymbolId);
AvailableColors borderColor = GetUniqueElement(_availableColors, nbs.BorderColor);
float rotation = GetUniqueElement(_availableRotations, nbs.Rot);
//...add a match if necessary
if (matchType == MemoflowMatchType.COLOR)
{
borderColor = nbs.BorderColor;
}
if (matchType == MemoflowMatchType.SYMBOL)
{
symbol = nbs.SymbolId;
}
//if( matchType == MATCH_TYPE.ROTATION) rotation = nbs.rotation;
//otherwise NO_MATCH was the case.
return(new MemoflowStepVO(symbol, _availableColors[_colorIndex], borderColor, rotation));
}