public override float GetNoteY(RuntimeNote note, float now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var timePoints = NoteAnimationHelper.CalculateNoteTimePoints(note, animationMetrics);
var onStageStatus = NoteAnimationHelper.GetOnStageStatusOf(note, now, timePoints);
float y;
switch (onStageStatus)
{
case OnStageStatus.Incoming:
y = animationMetrics.Top;
break;
case OnStageStatus.Visible:
y = GetNoteOnStageY(note, now, timePoints, animationMetrics);
break;
case OnStageStatus.Passed:
y = animationMetrics.Bottom;
break;
default:
throw new ArgumentOutOfRangeException();
}
return(y);
}
public override RibbonParameters GetHoldRibbonParameters(RuntimeNote startNote, RuntimeNote endNote, float now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var tp1 = NoteAnimationHelper.CalculateNoteTimePoints(startNote, animationMetrics);
var tp2 = NoteAnimationHelper.CalculateNoteTimePoints(endNote, animationMetrics);
var t1 = GetTransformedTime(startNote, now, tp1);
var t2 = GetTransformedTime(endNote, now, tp2);
var tperc = startNote.IsHold() ? 0.5 : 0.4;
var tm = MathHelperEx.Lerp(t1, t2, tperc);
var x1 = GetNoteX(startNote, now, noteMetrics, animationMetrics);
var x2 = GetNoteX(endNote, now, noteMetrics, animationMetrics);
var startStatus = NoteAnimationHelper.GetOnStageStatusOf(startNote, now, tp1);
float y1;
if (startStatus == OnStageStatus.Passed)
{
y1 = animationMetrics.Bottom;
}
else
{
y1 = GetNoteOnStageY(t1, animationMetrics);
}
var endStatus = NoteAnimationHelper.GetOnStageStatusOf(endNote, now, tp2);
float y2;
if (endStatus == OnStageStatus.Incoming)
{
y2 = animationMetrics.Top;
}
else
{
y2 = GetNoteOnStageY(t2, animationMetrics);
}
// CGSS-like
//var xm = GetNoteOnStageX(endNote.StartX, endNote.EndX, tm, animationMetrics);
// Naive guess
//var xm = (x1 + x2) / 2;
var xm = MathHelperEx.Lerp(x1, x2, 0.5f);
if (startNote.IsSlide())
{
if (endNote.EndX < startNote.EndX)
{
xm -= animationMetrics.Width * 0.02f * ((tp2.Leave - now) / (tp2.Leave - tp1.Enter));
}
else if (endNote.EndX > startNote.EndX)
{
xm += animationMetrics.Width * 0.02f * ((tp2.Leave - now) / (tp2.Leave - tp1.Enter));
}
}
var ym = GetNoteOnStageY(tm, animationMetrics);
var(cx1, cx2) = GetBezierFromQuadratic(x1, xm, x2);
var(cy1, cy2) = GetBezierFromQuadratic(y1, ym, y2);
return(new RibbonParameters(x1, y1, cx1, cy1, cx2, cy2, x2, y2));
}
public override SizeF GetNoteRadius(RuntimeNote note, double now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var timeRemaining = note.HitTime - now;
var timePoints = NoteAnimationHelper.CalculateNoteTimePoints(note, animationMetrics);
var timeTransformed = NoteTimeTransform((float)timeRemaining / timePoints.Duration);
var endRadius = noteMetrics.EndRadius;
if (timeTransformed < 0.75f)
{
if (timeTransformed < 0f)
{
return(endRadius);
}
else
{
var r = 1 - (float)timeTransformed * 0.933333333f;
return(new SizeF(endRadius.Width * r, endRadius.Height * r));
}
}
else
{
if (timeTransformed < 1f)
{
var r = (1 - (float)timeTransformed) * 1.2f;
return(new SizeF(endRadius.Width * r, endRadius.Height * r));
}
else
{
return(SizeF.Empty);
}
}
}
public override RibbonParameters GetSlideRibbonParameters(RuntimeNote startNote, RuntimeNote endNote, float now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var tp1 = NoteAnimationHelper.CalculateNoteTimePoints(startNote, animationMetrics);
var thisStatus = NoteAnimationHelper.GetOnStageStatusOf(startNote, now, tp1);
if (thisStatus < OnStageStatus.Passed)
{
return(GetHoldRibbonParameters(startNote, endNote, now, noteMetrics, animationMetrics));
}
var tp2 = NoteAnimationHelper.CalculateNoteTimePoints(endNote, animationMetrics);
var t1 = GetTransformedTime(startNote, now, tp1);
var t2 = GetTransformedTime(endNote, now, tp2);
var tperc = startNote.IsHold() ? 0.5 : 0.4;
var tm = MathHelperEx.Lerp(t1, t2, tperc);
var trackCount = animationMetrics.TrackCount;
var leftMarginRatio = animationMetrics.NoteEndXRatios[0];
var rightMarginRatio = animationMetrics.NoteEndXRatios[trackCount - 1];
var startXRatio = leftMarginRatio + (rightMarginRatio - leftMarginRatio) * (startNote.EndX / (trackCount - 1));
var endXRatio = leftMarginRatio + (rightMarginRatio - leftMarginRatio) * (endNote.EndX / (trackCount - 1));
var perc = (now - startNote.HitTime) / (endNote.HitTime - startNote.HitTime);
var x1Ratio = MathHelperEx.Lerp(startXRatio, endXRatio, perc);
var x1 = animationMetrics.Width * x1Ratio;
var y1 = animationMetrics.Bottom;
var x2 = GetNoteX(endNote, now, noteMetrics, animationMetrics);
var y2 = GetNoteOnStageY(t2, animationMetrics);
// CGSS-like
//var xm = GetNoteOnStageX(endNote.StartX, endNote.EndX, tm, animationMetrics);
// Naive guess
//var xm = (x1 + x2) / 2;
var xm = MathHelperEx.Lerp(x1, x2, 0.5f);
if (startNote.IsSlide())
{
if (endNote.EndX < startNote.EndX)
{
xm -= animationMetrics.Width * 0.02f * ((tp2.Leave - now) / (tp2.Leave - tp1.Enter));
}
else if (endNote.EndX > startNote.EndX)
{
xm += animationMetrics.Width * 0.02f * ((tp2.Leave - now) / (tp2.Leave - tp1.Enter));
}
}
var ym = GetNoteOnStageY(tm, animationMetrics);
var(cx1, cx2) = GetBezierFromQuadratic(x1, xm, x2);
var(cy1, cy2) = GetBezierFromQuadratic(y1, ym, y2);
return(new RibbonParameters(x1, y1, cx1, cy1, cx2, cy2, x2, y2));
}
private static float GetIncomingNoteXRatio([NotNull] RuntimeNote prevNote, RuntimeNote thisNote, double now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var trackCount = animationMetrics.TrackCount;
var trackXRatioStart = animationMetrics.NoteEndXRatios[0];
var trackXRatioEnd = animationMetrics.NoteEndXRatios[trackCount - 1];
var thisXRatio = trackXRatioStart + (trackXRatioEnd - trackXRatioStart) * (prevNote.EndX / (trackCount - 1));
var nextXRatio = trackXRatioStart + (trackXRatioEnd - trackXRatioStart) * (thisNote.EndX / (trackCount - 1));
var thisTimePoints = NoteAnimationHelper.CalculateNoteTimePoints(prevNote, animationMetrics);
var nextTimePoints = NoteAnimationHelper.CalculateNoteTimePoints(thisNote, animationMetrics);
var perc = (float)(now - thisTimePoints.Enter) / (float)(nextTimePoints.Enter - thisTimePoints.Enter);
return(MathHelper.Lerp(thisXRatio, nextXRatio, perc));
}
private static double GetTransformedTime(RuntimeNote note, double now, NoteAnimationMetrics animationMetrics)
{
var timePoints = NoteAnimationHelper.CalculateNoteTimePoints(note, animationMetrics);
var timeRemaining = note.HitTime - now;
var timeRemainingInWindow = (float)timeRemaining / timePoints.Duration;
if (timeRemaining > timePoints.Duration)
{
timeRemainingInWindow = 1;
}
if (timeRemaining < 0)
{
timeRemainingInWindow = 0;
}
return(NoteTimeTransform(timeRemainingInWindow));
}
public override Vector2 GetNoteRadius(RuntimeNote note, float now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var onStageStatus = NoteAnimationHelper.GetOnStageStatusOf(note, now, animationMetrics);
switch (onStageStatus)
{
case OnStageStatus.Incoming:
return(Vector2.Zero);
case OnStageStatus.Passed:
return(noteMetrics.EndRadius);
}
var timeRemaining = note.HitTime - now;
var timePoints = NoteAnimationHelper.CalculateNoteTimePoints(note, animationMetrics);
var timeTransformed = NoteTimeTransform(timeRemaining / timePoints.Duration);
var endRadius = noteMetrics.EndRadius;
if (timeTransformed < 0.75f)
{
if (timeTransformed < 0f)
{
return(endRadius);
}
else
{
var r = 1 - timeTransformed * 0.933333333f;
return(new Vector2(endRadius.X * r, endRadius.Y * r));
}
}
else
{
if (timeTransformed < 1f)
{
var r = (1 - timeTransformed) * 1.2f;
return(new Vector2(endRadius.X * r, endRadius.Y * r));
}
else
{
return(Vector2.Zero);
}
}
}
private static float GetIncomingNoteXRatio(RuntimeNote prevNote, RuntimeNote thisNote, float now, NoteAnimationMetrics animationMetrics)
{
var trackCount = animationMetrics.TrackCount;
var startLeftMarginRatio = animationMetrics.NoteStartXRatios[0];
var startRightMarginRatio = animationMetrics.NoteStartXRatios[trackCount - 1];
float xRatio;
if (thisNote.IsSlide())
{
var thisXRatio = startLeftMarginRatio + (startRightMarginRatio - startLeftMarginRatio) * (prevNote.EndX / (trackCount - 1));
var nextXRatio = startLeftMarginRatio + (startRightMarginRatio - startLeftMarginRatio) * (thisNote.EndX / (trackCount - 1));
var thisTimePoints = NoteAnimationHelper.CalculateNoteTimePoints(prevNote, animationMetrics);
var nextTimePoints = NoteAnimationHelper.CalculateNoteTimePoints(thisNote, animationMetrics);
var perc = (now - thisTimePoints.Enter) / (nextTimePoints.Enter - thisTimePoints.Enter);
xRatio = MathHelperEx.Lerp(thisXRatio, nextXRatio, perc);
}
else
{
float nextStartX;
if (thisNote.StartX < 0)
{
nextStartX = thisNote.StartX * 0.5f;
}
else if (thisNote.StartX > trackCount - 1)
{
nextStartX = (trackCount - 1) + (thisNote.StartX - (trackCount - 1)) * 0.5f;
}
else
{
nextStartX = thisNote.StartX;
}
xRatio = startLeftMarginRatio + (startRightMarginRatio - startLeftMarginRatio) * (nextStartX / (trackCount - 1));
}
return(xRatio);
}
public override Vector2 GetNoteRadius(RuntimeNote note, float now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var timePoints = NoteAnimationHelper.CalculateNoteTimePoints(note, animationMetrics);
var onStageStatus = NoteAnimationHelper.GetOnStageStatusOf(note, now, timePoints);
switch (onStageStatus)
{
case OnStageStatus.Incoming:
return(noteMetrics.StartRadius);
case OnStageStatus.Visible:
var passed = now - timePoints.Enter;
var perc = passed / timePoints.Duration;
var w = MathHelperEx.Lerp(noteMetrics.StartRadius.X, noteMetrics.EndRadius.X, perc);
var h = MathHelperEx.Lerp(noteMetrics.StartRadius.Y, noteMetrics.EndRadius.Y, perc);
return(new Vector2(w, h));
case OnStageStatus.Passed:
return(noteMetrics.EndRadius);
default:
throw new ArgumentOutOfRangeException();
}
}
public override float GetNoteX(RuntimeNote note, float now, NoteMetrics noteMetrics, NoteAnimationMetrics animationMetrics)
{
var trackCount = animationMetrics.TrackCount;
var endLeftMarginRatio = animationMetrics.NoteEndXRatios[0];
var endRightMarginRatio = animationMetrics.NoteEndXRatios[trackCount - 1];
var endXRatio = endLeftMarginRatio + (endRightMarginRatio - endLeftMarginRatio) * (note.EndX / (trackCount - 1));
var onStage = NoteAnimationHelper.GetOnStageStatusOf(note, now, animationMetrics);
float xRatio;
switch (onStage)
{
case OnStageStatus.Incoming:
if (note.HasPrevHold())
{
xRatio = GetIncomingNoteXRatio(note.PrevHold, note, now, animationMetrics);
}
else if (note.HasPrevSlide())
{
xRatio = GetIncomingNoteXRatio(note.PrevSlide, note, now, animationMetrics);
}
else
{
xRatio = endXRatio;
}
break;
case OnStageStatus.Passed:
if (note.HasNextSlide())
{
var destXRatio = endLeftMarginRatio + (endRightMarginRatio - endLeftMarginRatio) * (note.NextSlide.EndX / (trackCount - 1));
var nextPerc = (now - note.HitTime) / (note.NextSlide.HitTime - note.HitTime);
xRatio = MathHelperEx.Lerp(endXRatio, destXRatio, nextPerc);
}
else
{
xRatio = endXRatio;
}
break;
default:
var startLeftMarginRatio = animationMetrics.NoteStartXRatios[0];
var startRightMarginRatio = animationMetrics.NoteStartXRatios[trackCount - 1];
float whichStartToTake;
if (note.IsSlide())
{
whichStartToTake = note.EndX;
}
else
{
if (note.StartX < 0)
{
whichStartToTake = note.StartX * 0.5f;
}
else if (note.StartX > trackCount - 1)
{
whichStartToTake = (trackCount - 1) + (note.StartX - (trackCount - 1)) * 0.5f;
}
else
{
whichStartToTake = note.StartX;
}
}
var startXRatio = startLeftMarginRatio + (startRightMarginRatio - startLeftMarginRatio) * (whichStartToTake / (trackCount - 1));
var timePoints = NoteAnimationHelper.CalculateNoteTimePoints(note, animationMetrics);
var perc = (now - timePoints.Enter) / timePoints.Duration;
xRatio = MathHelperEx.Lerp(startXRatio, endXRatio, perc);
break;
}
return(animationMetrics.Width * xRatio);
}
internal RibbonMesh(RibbonMeshCreateParams createParams)
{
_vertexStride = 0;
_faceCount = 0;
_vertices = null;
_indices = null;
_vertexBuffer = null;
_indexBuffer = null;
if (createParams.RibbonParameters == null)
{
return;
}
if (createParams.NotePairs == null)
{
return;
}
if (createParams.RibbonParameters.Length == 0 || createParams.NotePairs.Length == 0 || createParams.RibbonParameters.Length != createParams.NotePairs.Length)
{
throw new ArgumentException();
}
if (!createParams.RibbonParameters.Any(rp => rp.Visible))
{
throw new ArgumentException();
}
Dispose();
var vertexCount = 0;
var indexCount = 0;
var now = createParams.Now;
var slice = createParams.Slice;
var visualNoteMetrics = createParams.VisualNoteMetrics;
var animationMetrics = createParams.AnimationMetrics;
// First, calculate the total ribbon length.
// Since CGSS allows ribbon to "fold", we cannot simply use Y coord value to calculate texture V value.
var bezierCount = createParams.RibbonParameters.Count(rp => rp.Visible && !rp.IsLine);
var ribbonCache = bezierCount > 0 ? new RibbonPointCache[bezierCount] : null;
var ribbonLength = 0f;
var bezierIndex = 0;
for (var i = 0; i < createParams.RibbonParameters.Length; ++i)
{
var rp = createParams.RibbonParameters[i];
if (!rp.Visible)
{
continue;
}
var notePair = createParams.NotePairs[i];
if (rp.IsLine)
{
ribbonLength += Math.Abs(rp.Y1 - rp.Y2);
}
else
{
float startTime, endTime;
var startStatus = NoteAnimationHelper.GetOnStageStatusOf(notePair.Start, now, animationMetrics);
if (startStatus == OnStageStatus.Passed)
{
startTime = now;
}
else
{
startTime = notePair.Start.HitTime;
}
var endStatus = NoteAnimationHelper.GetOnStageStatusOf(notePair.End, now, animationMetrics);
if (endStatus == OnStageStatus.Incoming)
{
var endTimePoints = NoteAnimationHelper.CalculateNoteTimePoints(notePair.End, animationMetrics);
endTime = now + endTimePoints.Duration;
}
else
{
endTime = notePair.End.HitTime;
}
var pts = new Vector2[slice + 1];
for (var j = 0; j <= slice; ++j)
{
var t = (float)j / slice;
var pt = RibbonMathHelper.CubicBezier(rp, t);
pts[j] = pt;
if (j > 0)
{
ribbonLength += Math.Abs(pt.Y - pts[j - 1].Y);
}
}
var pointCache = new RibbonPointCache {
StartTime = startTime,
EndTime = endTime,
Locations = pts
};
if (ribbonCache == null)
{
throw new InvalidOperationException();
}
ribbonCache[bezierIndex] = pointCache;
++bezierIndex;
}
}
if (ribbonLength <= 0)
{
// An empty ribbon.
SetVertices(createParams.Device, (RibbonVertex[])null);
SetIndices(createParams.Device, null);
}
else
{
// Normal case.
foreach (var rp in createParams.RibbonParameters)
{
if (!rp.Visible)
{
continue;
}
if (rp.IsLine)
{
vertexCount += 4;
indexCount += 6;
}
else
{
vertexCount += (slice + 1) * 2;
indexCount += slice * 6;
}
}
var z = createParams.Z;
var foldedZ = z - createParams.LayerDepth / 2;
var vertices = new RibbonVertex[vertexCount];
var indices = new ushort[indexCount];
var vertexStart = 0;
var indexStart = 0;
// Generated vertex order for a non-folded fragment:
// 1---2
// | / |
// 3---4
// (1,2,3) (4,3,2)
var processedRibbonLength = 0f;
bezierIndex = 0;
var traceCalculator = createParams.AnimationCalculator;
var textureTopYRatio = createParams.TextureTopYRatio;
var textureBottomYRatio = createParams.TextureBottomYRatio;
for (var i = 0; i < createParams.RibbonParameters.Length; ++i)
{
var rp = createParams.RibbonParameters[i];
if (!rp.Visible)
{
continue;
}
var notePair = createParams.NotePairs[i];
// Normal ribbon is flowing from top to bottom (Y1 < Y2); CGSS would have a part from downside to upside.
// If this fragment is folded, we must place it under the normal layer (z - layerDepth / 2).
bool isFragmentFolded;
float zToUse;
float perc;
float v;
if (rp.IsLine)
{
var startRadius = traceCalculator.GetNoteRadius(notePair.Start, now, visualNoteMetrics, animationMetrics);
var endRadius = traceCalculator.GetNoteRadius(notePair.End, now, visualNoteMetrics, animationMetrics);
isFragmentFolded = rp.Y1 > rp.Y2;
zToUse = isFragmentFolded ? foldedZ : z;
perc = processedRibbonLength / ribbonLength;
v = MathHelper.Lerp(textureTopYRatio, textureBottomYRatio, perc);
var leftTopVertex = new RibbonVertex(rp.X1 - endRadius.X / 2, rp.Y1, zToUse, 0, 0, 1, 0, v);
var rightTopVertex = new RibbonVertex(rp.X1 + endRadius.X / 2, rp.Y1, zToUse, 0, 0, 1, 1, v);
perc = (processedRibbonLength + Math.Abs(rp.Y1 - rp.Y2)) / ribbonLength;
v = MathHelper.Lerp(textureTopYRatio, textureBottomYRatio, perc);
var leftBottomVertex = new RibbonVertex(rp.X2 - startRadius.X / 2, rp.Y2, zToUse, 0, 0, 1, 0, v);
var rightBottomVertex = new RibbonVertex(rp.X2 + startRadius.X / 2, rp.Y2, zToUse, 0, 0, 1, 1, v);
vertices[vertexStart] = leftTopVertex;
vertices[vertexStart + 1] = rightTopVertex;
vertices[vertexStart + 2] = leftBottomVertex;
vertices[vertexStart + 3] = rightBottomVertex;
if (isFragmentFolded)
{
indices[indexStart] = (ushort)(vertexStart + 2);
indices[indexStart + 1] = (ushort)(vertexStart + 1);
indices[indexStart + 2] = (ushort)vertexStart;
indices[indexStart + 3] = (ushort)(vertexStart + 1);
indices[indexStart + 4] = (ushort)(vertexStart + 2);
indices[indexStart + 5] = (ushort)(vertexStart + 3);
}
else
{
indices[indexStart] = (ushort)vertexStart;
indices[indexStart + 1] = (ushort)(vertexStart + 1);
indices[indexStart + 2] = (ushort)(vertexStart + 2);
indices[indexStart + 3] = (ushort)(vertexStart + 3);
indices[indexStart + 4] = (ushort)(vertexStart + 2);
indices[indexStart + 5] = (ushort)(vertexStart + 1);
}
vertexStart += 4;
indexStart += 6;
processedRibbonLength += Math.Abs(rp.Y1 - rp.Y2);
}
else
{
if (ribbonCache == null)
{
throw new InvalidOperationException();
}
var cache = ribbonCache[bezierIndex];
var deltaTime = cache.EndTime - cache.StartTime;
for (var j = 0; j <= slice; ++j)
{
var t = (float)j / slice;
var ribbonTime = cache.EndTime - deltaTime * t;
var pt = cache.Locations[j];
if (j < slice)
{
isFragmentFolded = pt.Y > cache.Locations[j + 1].Y;
}
else
{
// Here, j = slice
isFragmentFolded = cache.Locations[slice - 1].Y > pt.Y;
}
zToUse = isFragmentFolded ? foldedZ : z;
var noteRadius = traceCalculator.GetNoteRadius(notePair.Start, ribbonTime, visualNoteMetrics, animationMetrics);
perc = processedRibbonLength / ribbonLength;
v = MathHelper.Lerp(textureTopYRatio, textureBottomYRatio, perc);
var leftVertex = new RibbonVertex(pt.X - noteRadius.X / 2, pt.Y, zToUse, 0, 0, 1, 0, v);
var rightVertex = new RibbonVertex(pt.X + noteRadius.X / 2, pt.Y, zToUse, 0, 0, 1, 1, v);
vertices[vertexStart + j * 2] = leftVertex;
vertices[vertexStart + j * 2 + 1] = rightVertex;
if (j < slice)
{
if (isFragmentFolded)
{
indices[indexStart + j * 6] = (ushort)(vertexStart + j * 2 + 2);
indices[indexStart + j * 6 + 1] = (ushort)(vertexStart + j * 2 + 1);
indices[indexStart + j * 6 + 2] = (ushort)(vertexStart + j * 2);
indices[indexStart + j * 6 + 3] = (ushort)(vertexStart + j * 2 + 1);
indices[indexStart + j * 6 + 4] = (ushort)(vertexStart + j * 2 + 2);
indices[indexStart + j * 6 + 5] = (ushort)(vertexStart + j * 2 + 3);
}
else
{
indices[indexStart + j * 6] = (ushort)(vertexStart + j * 2);
indices[indexStart + j * 6 + 1] = (ushort)(vertexStart + j * 2 + 1);
indices[indexStart + j * 6 + 2] = (ushort)(vertexStart + j * 2 + 2);
indices[indexStart + j * 6 + 3] = (ushort)(vertexStart + j * 2 + 3);
indices[indexStart + j * 6 + 4] = (ushort)(vertexStart + j * 2 + 2);
indices[indexStart + j * 6 + 5] = (ushort)(vertexStart + j * 2 + 1);
}
processedRibbonLength += Math.Abs(cache.Locations[j + 1].Y - cache.Locations[j].Y);
}
}
vertexStart += (slice + 1) * 2;
indexStart += slice * 6;
++bezierIndex;
}
}
_vertices = vertices;
_indices = indices;
SetVertices(createParams.Device, vertices);
SetIndices(createParams.Device, indices);
}
}