public VerticalDir DefaultStemDirection(Clef clef)
{
M.Assert(this.HeadsTopDown.Count > 0);
double gap = 32; // dummy value
List <double> topDownHeadOriginYs = new List <double>();
int lastMidiPitch = int.MaxValue;
foreach (Head head in this.HeadsTopDown)
{
M.Assert(head.MidiPitch < lastMidiPitch);
topDownHeadOriginYs.Add(head.GetOriginY(clef, gap));
}
double heightOfMiddleStaffLine = (this.Voice.Staff.NumberOfStafflines / 2) * gap;
double halfHeight = 0;
if (topDownHeadOriginYs.Count == 1)
{
halfHeight = topDownHeadOriginYs[0];
}
else
{
halfHeight = (topDownHeadOriginYs[topDownHeadOriginYs.Count - 1] + topDownHeadOriginYs[0]) / 2;
}
if (halfHeight <= heightOfMiddleStaffLine)
{
return(VerticalDir.down);
}
else
{
return(VerticalDir.up);
}
}
public SmallClefMetrics(Clef clef, double gap, CSSObjectClass cssClass, ClefID clefID)
: base(clef, gap, cssClass, clefID)
{
_right = 3.5F * gap; // small clefs have proportionally more empty space on the right.
if (clef.ClefType[0] == 'b' && clef.ClefType.Length > 1)
{
//double lowBassBottom = gap * 4.5;
_bottom = gap * 4.65; // small bass clef octaves are lower than for normal bass clefs
}
}
/// <summary>
/// Sets Chord.Stem.Direction for each chord.
/// BeamBlocks are created, beginning with a chord that has IsBeamStart == true, and ending with a chord that has IsBeamEnd == true.
/// BeamBlocks only contain ChordSymbols, but these may be interspersed with other NoteObjects (barlines, clefs, rests, cautionaryChords etc...)
/// </summary>
public void SetChordStemDirectionsAndCreateBeamBlocks(PageFormat pageFormat)
{
List <List <OutputChordSymbol> > beamedGroups = GetBeamedGroups();
Clef currentClef = null;
List <OutputChordSymbol> beamedGroup = null;
int groupIndex = 0;
OutputChordSymbol firstChordInVoice = ((OutputChordSymbol)NoteObjects.Find(x => x is OutputChordSymbol));
foreach (var noteObject in NoteObjects)
{
if (noteObject is OutputChordSymbol chord)
{
if (chord.BeamBlockDef != null)
{
M.Assert(currentClef != null);
beamedGroup = beamedGroups[groupIndex];
if (chord.IsBeamStart || (chord == firstChordInVoice && (chord.IsBeamRestart || chord.IsBeamEnd)))
{
groupIndex++;
}
double beamThickness = pageFormat.BeamThickness;
double beamStrokeThickness = pageFormat.StafflineStemStrokeWidthVBPX;
chord.BeamBlock = new BeamBlock(currentClef, beamedGroup, this.StemDirection, beamThickness, beamStrokeThickness);
}
else if (chord.IsBeamEnd)
{
beamedGroup = null;
}
else if (beamedGroup == null)
{
M.Assert(currentClef != null);
if (this.StemDirection == VerticalDir.none)
{
chord.Stem.Direction = chord.DefaultStemDirection(currentClef);
}
else
{
chord.Stem.Direction = this.StemDirection;
}
}
}
if (noteObject is Clef clef)
{
currentClef = clef;
}
}
}
public ClefMetrics(Clef clef, double gap, CSSObjectClass cssClefClass, ClefID clefID)
: base(cssClefClass)
{
double trebleTop = -4.35F * gap;
double trebleRight = 3.1F * gap;
double highTrebleTop = -5.9F * gap;
double trebleBottom = 2.7F * gap;
#region treble clefs
switch (clef.ClefType)
{
case "t":
_top = trebleTop;
_right = trebleRight;
_bottom = trebleBottom;
break;
case "t1": // trebleClef8
_top = highTrebleTop;
_right = trebleRight;
_bottom = trebleBottom;
break;
case "t2": // trebleClef2x8
_top = highTrebleTop;
_right = trebleRight;
_bottom = trebleBottom;
break;
case "t3": // trebleClef3x8
_top = highTrebleTop;
_right = trebleRight;
_bottom = trebleBottom;
break;
default: // can be a bass clef ( see below)
break;
}
if (_right > 0F)
{
Move(0, 3 * gap);
}
#endregion treble clefs
if (!(_right > 0F))
{
double bassTop = -gap;
double bassRight = trebleRight;
double bassBottom = gap * 3;
double lowBassBottom = gap * 4.5;
#region bass clefs
switch (clef.ClefType)
{
case "b":
_top = bassTop;
_right = bassRight;
_bottom = bassBottom;
break;
case "b1": // bassClef8
_top = bassTop;
_right = bassRight;
_bottom = lowBassBottom;
break;
case "b2": // bassClef2x8
_top = bassTop;
_right = bassRight;
_bottom = lowBassBottom;
break;
case "b3": // bassClef3x8
_top = bassTop;
_right = bassRight;
_bottom = lowBassBottom;
break;
default:
M.Assert(false, "Unknown clef type.");
break;
}
if (_right > 0F)
{
Move(0, gap);
}
}
#endregion
ClefID = clefID;
if (!_usedClefIDs.Contains((ClefID)clefID))
{
_usedClefIDs.Add((ClefID)clefID);
}
}
/// <summary>
/// Returns the head's y-coordinates wrt the chord.
/// The chord's y-origin is the top line of the staff.
/// (Y-Alignment of a notehead on the top line of the staff is 0.)
/// Uses the following protected variables (in Metrics) which have been set by GetStaffParameters()
/// protected double _gapVBPX = 0;
/// protected int _nStafflines = 0;
/// protected ClefSymbol _clef = null;
/// </summary>
/// <param name="headIndex"></param>
/// <param name="?"></param>
/// <param name="?"></param>
public double GetOriginY(Clef clef, double gap)
{
string[] alphabet = { "C", "D", "E", "F", "G", "A", "B" };
double shiftFactor = 0;
switch (this.Pitch[0])
{
case 'A':
shiftFactor = 2.5;
break;
case 'B':
shiftFactor = 2;
break;
case 'C':
shiftFactor = 5;
break;
case 'D':
shiftFactor = 4.5;
break;
case 'E':
shiftFactor = 4;
break;
case 'F':
shiftFactor = 3.5;
break;
case 'G':
shiftFactor = 3;
break;
}
// shiftFactor is currently for the octave above middle C (octave = 5) on a normal treble clef
// F6 is at shiftFactor 0 (the top line of the staff).
int octave = 0;
try
{
string octaveString = this.Pitch.Substring(this.Pitch.Length - 1);
if (octaveString == ":")
{
octave = 10;
}
else
{
octave = int.Parse(octaveString);
}
}
catch
{
M.Assert(false, "Error in octave string");
}
double octaveShift = octave - 4;
shiftFactor -= (octaveShift * 3.5F); // 3.5 spaces is one octave
// shiftFactor is currently correct for all octaves on a normal treble clef
switch (clef.ClefType)
{
case "t":
break;
case "t1": // trebleClef8
shiftFactor += 3.5; // shift down one octave
break;
case "t2": // trebleClef2x8
shiftFactor += 7; // shift down two octaves
break;
case "t3": // trebleClef3x8
shiftFactor += 10.5; // shift down three octaves
break;
case "b":
shiftFactor -= 6; // shift up six spaces
break;
case "b1": // bassClef8
shiftFactor -= 9.5; // shift up six spaces + 1 octave
break;
case "b2": // bassClef2x8
shiftFactor -= 13; // shift up six spaces + 2 octaves
break;
case "b3": // bassClef3x8
shiftFactor -= 16.5; // shift up six spaces + 3 octaves
break;
default:
break;
}
double headY = shiftFactor * gap;
return(headY);
}
