public BaseHitObject Parse(string text)
{
try
{
string[] splits = text.Split(',');
Vector2 pos = new Vector2(ParseUtils.ParseFloat(splits[0]), ParseUtils.ParseFloat(splits[1]));
float startTime = ParseUtils.ParseFloat(splits[2]) + offset;
HitObjectType type = (HitObjectType)ParseUtils.ParseInt(splits[3]);
int comboOffset = (int)(type & HitObjectType.ComboOffset) >> 4;
type &= ~HitObjectType.ComboOffset;
bool isNewCombo = (int)(type & HitObjectType.NewCombo) != 0;
type &= ~HitObjectType.NewCombo;
var soundType = (SoundType)ParseUtils.ParseInt(splits[4]);
var customSample = new CustomSampleInfo();
// Now parse the actual hit objects.
BaseHitObject result = null;
// If this object is a hit circle
if ((type & HitObjectType.Circle) != 0)
{
result = CreateCircle(pos, isNewCombo, comboOffset);
if (splits.Length > 5)
{
ParseCustomSample(splits[5], customSample);
}
}
else if ((type & HitObjectType.Slider) != 0)
{
PathType pathType = PathType.Catmull;
float length = 0;
string[] pointSplits = splits[5].Split('|');
// Find the number of valid slider node points.
int pointCount = 1;
foreach (var p in pointSplits)
{
if (p.Length > 1)
{
pointCount++;
}
}
// Parse node points
var nodePoints = new Vector2[pointCount];
nodePoints[0] = Vector2.zero;
int pointIndex = 1;
foreach (var p in pointSplits)
{
// Determine which path type was found.
if (p.Length == 1)
{
switch (p)
{
case "C":
pathType = PathType.Catmull;
break;
case "B":
pathType = PathType.Bezier;
break;
case "L":
pathType = PathType.Linear;
break;
case "P":
pathType = PathType.PerfectCurve;
break;
}
continue;
}
// Parse point position
string[] pointPos = p.Split(':');
nodePoints[pointIndex++] = new Vector2(ParseUtils.ParseFloat(pointPos[0]), ParseUtils.ParseFloat(pointPos[1])) - pos;
}
// Change perfect curve to linear if certain conditions meet.
if (nodePoints.Length == 3 && pathType == PathType.PerfectCurve && IsLinearPerfectCurve(nodePoints))
{
pathType = PathType.Linear;
}
// Parse slider repeat count
int repeatCount = ParseUtils.ParseInt(splits[6]);
if (repeatCount > 9000)
{
throw new Exception();
}
// Osu file has +1 addition to the actual number of repeats.
repeatCount = Math.Max(0, repeatCount - 1);
if (splits.Length > 7)
{
length = Math.Max(0, ParseUtils.ParseFloat(splits[7]));
}
if (splits.Length > 10)
{
ParseCustomSample(splits[10], customSample);
}
// Number of repeats + start(1) + end(1)
int nodeCount = repeatCount + 2;
// Parse per-node sound samples
var nodeCustomSamples = new List <CustomSampleInfo>();
for (int i = 0; i < nodeCount; i++)
{
nodeCustomSamples.Add(customSample.Clone());
}
if (splits.Length > 9 && splits[9].Length > 0)
{
string[] sets = splits[9].Split('|');
for (int i = 0; i < nodeCount; i++)
{
if (i >= sets.Length)
{
break;
}
ParseCustomSample(sets[i], nodeCustomSamples[i]);
}
}
// Set all nodes' sample types to default.
var nodeSampleTypes = new List <SoundType>();
for (int i = 0; i < nodeCount; i++)
{
nodeSampleTypes.Add(soundType);
}
// Parse per-node sample types
if (splits.Length > 8 && splits[8].Length > 0)
{
string[] nodeSampleSplits = splits[8].Split('|');
for (int i = 0; i < nodeCount; i++)
{
if (i > nodeSampleSplits.Length)
{
break;
}
nodeSampleTypes[i] = (SoundType)ParseUtils.ParseInt(nodeSampleSplits[i]);
}
}
// Map sample types to custom sample infos.
var nodeSamples = new List <List <SoundInfo> >(nodeCount);
for (int i = 0; i < nodeCount; i++)
{
nodeSamples.Add(GetSamples(nodeSampleTypes[i], nodeCustomSamples[i]));
}
result = CreateSlider(pos, isNewCombo, comboOffset, nodePoints, length, pathType, repeatCount, nodeSamples);
// Hit sound for the root slider should be played at the end.
result.Samples = nodeSamples[nodeSamples.Count - 1];
}
else if ((type & HitObjectType.Spinner) != 0)
{
float endTime = Math.Max(startTime, ParseUtils.ParseFloat(splits[5]) + offset);
result = CreateSpinner(pos, isNewCombo, comboOffset, endTime);
if (splits.Length > 6)
{
ParseCustomSample(splits[6], customSample);
}
}
else if ((type & HitObjectType.Hold) != 0)
{
float endTime = Math.Max(startTime, ParseUtils.ParseFloat(splits[2] + offset));
// I can understand all others except this, because Hold type only exists for Mania mode.
if (splits.Length > 5 && !string.IsNullOrEmpty(splits[5]))
{
string[] sampleSplits = splits[5].Split(':');
endTime = Math.Max(startTime, ParseUtils.ParseFloat(sampleSplits[0]));
ParseCustomSample(string.Join(":", sampleSplits.Skip(1).ToArray()), customSample);
}
result = CreateHold(pos, isNewCombo, comboOffset, endTime + offset);
}
if (result == null)
{
Logger.LogVerbose("HitObjectParser.Parse - Unknown hit object for line: " + text);
return(null);
}
result.StartTime = startTime;
if (result.Samples.Count == 0)
{
result.Samples = GetSamples(soundType, customSample);
}
isFirstObject = false;
return(result);
}
catch (Exception e)
{
Logger.LogError($"HitObjectParser.Parse - Failed to parse line: {text}, Error: {e.Message}");
}
return(null);
}