/// <summary>
/// Calculates slur height trying to avoid collisions with stems
/// </summary>
/// <param name="note"></param>
/// <param name="endPoint"></param>
/// <returns></returns>
private double DetermineSlurHeight(Note note, Slur slur, SlurInfo slurStartInfo, Point endPoint)
{
var notesUnderSlur = note.Staff.EnumerateUntilConditionMet <Note>(note, n => n.Slurs.FirstOrDefault(s => s.Number == slur.Number)?.Type == NoteSlurType.Start, true).ToArray();
if (notesUnderSlur.Length < 3)
{
return(10);
}
var notesUnderSlurExclusive = notesUnderSlur.Take(notesUnderSlur.Length - 1).Skip(1);
var mostExtremePoint = GetMostExtremePoint(notesUnderSlurExclusive, slurStartInfo.StartPlacement);
var angle = UsefulMath.BeamAngle(slurStartInfo.StartPoint.X, slurStartInfo.StartPoint.Y, endPoint.X, endPoint.Y);
var slurYPositionInMostExtremePoint = slurStartInfo.StartPoint.TranslateHorizontallyAndMaintainAngle(angle, mostExtremePoint.X - slurStartInfo.StartPoint.X).Y;
var mostExtremeYPosition = mostExtremePoint.Y;
if (slurStartInfo.StartPlacement == VerticalPlacement.Above && mostExtremeYPosition < slurYPositionInMostExtremePoint)
{
return(Math.Abs(mostExtremeYPosition - slurYPositionInMostExtremePoint) + 10);
}
if (slurStartInfo.StartPlacement == VerticalPlacement.Below && mostExtremeYPosition > slurYPositionInMostExtremePoint)
{
return(Math.Abs(slurYPositionInMostExtremePoint - mostExtremeYPosition) + 10);
}
return(10);
}
/// <summary> /// Draws of performs additional logic at slur end /// </summary> /// <param name="renderer">Score renderer</param> /// <param name="slur">Slur</param> /// <param name="element">Element with a slur</param> /// <param name="notePositionY">Y position of element with a slur</param> /// <param name="slurStartInfo">Information about slur start point</param> /// <param name="slurPlacement">Information about slur placement</param> protected abstract void ProcessSlurEnd(ScoreRendererBase renderer, Slur slur, Note element, double notePositionY, SlurInfo slurStartInfo, VerticalPlacement slurPlacement);
/// <summary>
/// Draws or performs additional logic at slur start
/// </summary>
/// <param name="renderer">Score renderer</param>
/// <param name="slur">Slur</param>
/// <param name="element">Element with a slur</param>
/// <param name="notePositionY"></param>
/// <param name="slurStartInfo">Information about slur start point</param>
/// <param name="slurPlacement">Information about slur placement</param>
protected override void ProcessSlurStart(ScoreRendererBase renderer, Slur slur, Note element, double notePositionY, SlurInfo slurStartInfo, VerticalPlacement slurPlacement)
{
slurStartInfo.StartPoint = RelativeToAbsolute(renderer, renderer.TenthsToPixels(slur.BezierControlPoint), notePositionY);
slurStartInfo.BezierStartControlPoint = RelativeToAbsolute(renderer, renderer.TenthsToPixels(slur.BezierStartOrEndPoint), notePositionY);
}
/// <summary>
/// Draws of performs additional logic at slur end
/// </summary>
/// <param name="renderer">Score renderer</param>
/// <param name="slur">Slur</param>
/// <param name="element">Element with a slur</param>
/// <param name="notePositionY">Y position of element with a slur</param>
/// <param name="slurStartInfo">Information about slur start point</param>
/// <param name="slurPlacement">Information about slur placement</param>
protected override void ProcessSlurEnd(ScoreRendererBase renderer, Slur slur, Note element, double notePositionY, SlurInfo slurStartInfo, VerticalPlacement slurPlacement)
{
Point endPoint;
var noteheadWidth = element.GetNoteheadWidthPx(renderer);
if (slurStartInfo.StartPlacement == VerticalPlacement.Above)
{
var xShiftConcerningStemDirectionEnd = noteheadWidth / 2;
bool hasFlagOrBeam = element.BaseDuration.Denominator > 4;
endPoint = new Point(scoreService.CursorPositionX + xShiftConcerningStemDirectionEnd,
(element.StemDirection == VerticalDirection.Up ? element.StemEndLocation.Y + (hasFlagOrBeam ? -2 : 0) : notePositionY - 7));
}
else if (slurStartInfo.StartPlacement == VerticalPlacement.Below)
{
var xShiftConcerningStemDirectionEnd = noteheadWidth / 2;
endPoint = new Point(scoreService.CursorPositionX + xShiftConcerningStemDirectionEnd, notePositionY + 5);
}
else
{
throw new Exception("Unsupported placement type.");
}
var slurHeight = DetermineSlurHeight(element, slur, slurStartInfo, endPoint);
for (int i = 0; i < 3; i++) //Draw a few curves one by one to simulate a curve with variable thickness. It will be replaced by a path in future releases.
{
var controlPoints = GetBezierControlPoints(slurStartInfo.StartPoint, endPoint, slurStartInfo.StartPlacement, slurHeight + i);
renderer.DrawBezier(slurStartInfo.StartPoint, controlPoints.Item1, controlPoints.Item2, endPoint, element);
}
//DrawSlurFrame(renderer, startPoint, controlPoints.Item1, controlPoints.Item2, endPoint, element);
}
/// <summary>
/// Draws or performs additional logic at slur start
/// </summary>
/// <param name="renderer">Score renderer</param>
/// <param name="slur">Slur</param>
/// <param name="element">Element with a slur</param>
/// <param name="notePositionY"></param>
/// <param name="slurStartInfo">Information about slur start point</param>
/// <param name="slurPlacement">Information about slur placement</param>
protected override void ProcessSlurStart(ScoreRendererBase renderer, Slur slur, Note element, double notePositionY, SlurInfo slurStartInfo, VerticalPlacement slurPlacement)
{
slurStartInfo.StartPlacement = slurPlacement;
slurStartInfo.StartPointStemDirection = element.StemDirection;
var polihymniaFix = renderer.LinespacesToPixels(element.GetNoteheadWidthLs(renderer) * 0.5);
if (slurPlacement == VerticalPlacement.Above)
{
bool hasFlagOrBeam = element.BaseDuration.Denominator > 4; //If note has a flag or beam start the slur above the note. If not, start a bit to the right and down.
var xShiftConcerningStemDirectionStart = slurStartInfo.StartPointStemDirection == VerticalDirection.Up ? (hasFlagOrBeam ? 5 : 10) : 1;
slurStartInfo.StartPoint = new Point(scoreService.CursorPositionX + xShiftConcerningStemDirectionStart + polihymniaFix, element.StemDirection == VerticalDirection.Down ? notePositionY - 7 : element.StemEndLocation.Y + (hasFlagOrBeam ? -3 : 8));
}
else
{
slurStartInfo.StartPoint = new Point(scoreService.CursorPositionX + 3 + polihymniaFix, notePositionY + 5);
}
}
