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Parse points and segments for path string

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Huo Yaoyuan 2024-02-28 22:01:39 +08:00
parent 2889cf39d7
commit f49aa4d815
1 changed files with 38 additions and 19 deletions
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57
osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
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@ -266,30 +266,49 @@ namespace osu.Game.Rulesets.Objects.Legacy
// This code takes on the responsibility of handling explicit segments of the path ("X" & "Y" from above). Implicit segments are handled by calls to convertPoints().
string[] pointSplit = pointString.Split('|');
var controlPoints = new List<Memory<PathControlPoint>>();
int startIndex = 0;
int endIndex = 0;
bool first = true;
Span<Vector2> points = stackalloc Vector2[pointSplit.Length];
Span<(PathType Type, int StartIndex)> segments = stackalloc (PathType Type, int StartIndex)[pointSplit.Length];
int pointsCount = 0;
int segmentsCount = 0;
while (++endIndex < pointSplit.Length)
foreach (string s in pointSplit)
{
// Keep incrementing endIndex while it's not the start of a new segment (indicated by having an alpha character at position 0).
if (!char.IsLetter(pointSplit[endIndex][0]))
continue;
// Multi-segmented sliders DON'T contain the end point as part of the current segment as it's assumed to be the start of the next segment.
// The start of the next segment is the index after the type descriptor.
string endPoint = endIndex < pointSplit.Length - 1 ? pointSplit[endIndex + 1] : null;
controlPoints.AddRange(convertPoints(pointSplit.AsMemory().Slice(startIndex, endIndex - startIndex), endPoint, first, offset));
startIndex = endIndex;
first = false;
if (char.IsLetter(s[0]))
{
// The start of a new segment(indicated by having an alpha character at position 0).
var pathType = convertPathType(s);
segments[segmentsCount++] = (pathType, pointsCount);
}
else
{
points[pointsCount++] = readPoint(s, offset);
}
}
if (endIndex > startIndex)
controlPoints.AddRange(convertPoints(pointSplit.AsMemory().Slice(startIndex, endIndex - startIndex), null, first, offset));
var controlPoints = new List<PathControlPoint>(pointsCount);
return mergePointsLists(controlPoints);
for (int i = 0; i < segmentsCount; i++)
{
int startIndex = segments[i].StartIndex;
int endIndex = i < segmentsCount - 1 ? segments[i + 1].StartIndex : pointsCount;
Vector2? endPoint = i < segmentsCount - 1 ? points[endIndex] : null;
controlPoints.AddRange(convertPoints(segments[i].Type, points[startIndex..endIndex], endPoint));
}
return controlPoints.ToArray();
static Vector2 readPoint(string value, Vector2 startPos)
{
string[] vertexSplit = value.Split(':');
Vector2 pos = new Vector2((int)Parsing.ParseDouble(vertexSplit[0], Parsing.MAX_COORDINATE_VALUE), (int)Parsing.ParseDouble(vertexSplit[1], Parsing.MAX_COORDINATE_VALUE)) - startPos;
return pos;
}
}
private IEnumerable<PathControlPoint> convertPoints(PathType type, ReadOnlySpan<Vector2> points, Vector2? endPoint)
{
throw new NotImplementedException();
}
/// <summary>