public DiatonicToneClass KeyOfPitchClass(
ChromaticPitchClass pitch,
out PitchTransform displaytransform
)
{
foreach (var keytransformkvp in keytransforms)
{
if (SemiToneOfKey(new DiatonicTone(keytransformkvp.Key, 0)).PitchClass == pitch)
{
displaytransform = PitchTransform.Natural;
return(keytransformkvp.Key);
}
}
var naturalkey =
keytransforms
.Sum(keytransformkvp => keytransformkvp.Value.Steps) > 0 ?
pitch.GetNaturalKeyClass_PreferSharps() :
pitch.GetNaturalKeyClass_PreferFlats();
var naturalpitch =
naturalkey.GetPitchClass();
var keytransform =
this[naturalkey];
displaytransform = new PitchTransform((int)pitch - (int)naturalpitch);
return(naturalkey);
}
public static DiatonicTone Key(
this KeySignature signature,
SemiTone tone,
out PitchTransform transform
) =>
new DiatonicTone(
signature.KeyOfPitchClass(tone.PitchClass, out transform),
tone.Octave
);
public NoteLayout(
PerceptualNote core,
int halfline,
float x,
float width,
DiatonicTone key,
PitchTransform transform
)
{
this.core = core;
this.halfline = halfline;
this.x = x;
this.width = width;
this.key = key;
this.transform = transform;
}
public KeySignature(
PitchTransform transform_c,
PitchTransform transform_d,
PitchTransform transform_e,
PitchTransform transform_f,
PitchTransform transform_g,
PitchTransform transform_a,
PitchTransform transform_b
)
{
this[DiatonicToneClass.C] = transform_c;
this[DiatonicToneClass.D] = transform_d;
this[DiatonicToneClass.E] = transform_e;
this[DiatonicToneClass.F] = transform_f;
this[DiatonicToneClass.G] = transform_g;
this[DiatonicToneClass.A] = transform_a;
this[DiatonicToneClass.B] = transform_b;
}
public static DiatonicToneClass Index(int i, ChromaticPitchClass basis, out PitchTransform transform)
{
var color = Index(i, basis);
DiatonicToneClass diatonicclass;
if (i > 0)
{
diatonicclass = color.GetNaturalKeyClass_PreferSharps();
}
else
{
diatonicclass = color.GetNaturalKeyClass_PreferFlats();
}
transform = new PitchTransform(diatonicclass.GetPitchClass() - color);
return(diatonicclass);
}
public static ChromaticPitchClass Transform(
this PitchTransform transform,
ChromaticPitchClass pitch
) =>
(ChromaticPitchClass)(((int)pitch + transform.Steps + 12) % 12);
public AdornmentTrack(
StorageObjectID storageobjectID,
EditorFile file
) :
base(
storageobjectID,
file
)
{
obj = this.Object();
binder_staffs =
Staffs.Bind(
obj.GetOrMake("staffs").ID,
File
);
binder_staffs.Deserializer = staff_obj => {
using (var stream = staff_obj.OpenRead()) {
using (var br = new BinaryReader(stream)) {
var staff = new Staff();
staff.Lines = br.ReadInt32();
staff.MiddleHalfLine = br.ReadInt32();
staff.Shift = br.ReadInt32();
staff.Clef.BottomKey = new DiatonicTone(br.ReadInt32());
staff.Clef.Symbol = (ClefSymbol)br.ReadInt32();
return(staff);
}
}
};
binder_staffs.Serializer = (staff_obj, staff) => {
using (var stream = staff_obj.OpenWrite()) {
using (var bw = new BinaryWriter(stream)) {
bw.Write(staff.Lines);
bw.Write(staff.MiddleHalfLine);
bw.Write(staff.Shift);
bw.Write(staff.Clef.BottomKey.Tones);
bw.Write((int)staff.Clef.Symbol);
}
}
};
binder_keysigs =
KeySignatures.Bind(
obj.GetOrMake("key-signatures").ID,
File
);
binder_keysigs.Deserializer = keysig_obj => {
using (var stream = keysig_obj.OpenRead()) {
using (var br = new BinaryReader(stream)) {
var transform_a = new PitchTransform(br.ReadInt32());
var transform_b = new PitchTransform(br.ReadInt32());
var transform_c = new PitchTransform(br.ReadInt32());
var transform_d = new PitchTransform(br.ReadInt32());
var transform_e = new PitchTransform(br.ReadInt32());
var transform_f = new PitchTransform(br.ReadInt32());
var transform_g = new PitchTransform(br.ReadInt32());
var keysig =
new KeySignature(
transform_c,
transform_d,
transform_e,
transform_f,
transform_g,
transform_a,
transform_b
);
return(keysig);
}
}
};
binder_keysigs.Serializer = (keysig_obj, keysig) => {
using (var stream = keysig_obj.OpenWrite()) {
using (var bw = new BinaryWriter(stream)) {
bw.Write(keysig[DiatonicToneClass.A].Steps);
bw.Write(keysig[DiatonicToneClass.B].Steps);
bw.Write(keysig[DiatonicToneClass.C].Steps);
bw.Write(keysig[DiatonicToneClass.D].Steps);
bw.Write(keysig[DiatonicToneClass.E].Steps);
bw.Write(keysig[DiatonicToneClass.F].Steps);
bw.Write(keysig[DiatonicToneClass.G].Steps);
}
}
};
}
public SemiTone SemiToneOfKey(DiatonicTone diatone, PitchTransform transform) => transform * (this[diatone.KeyClass] * new SemiTone(diatone.KeyClass.GetPitchClass(), diatone.Octave));
public static KeySignature Create(
DiatonicToneClass key,
PitchTransform transform,
Mode mode
)
{
var modesteps = new PitchTransform[] {
PitchTransform.DoubleSharp,
PitchTransform.DoubleSharp,
PitchTransform.Sharp,
PitchTransform.DoubleSharp,
PitchTransform.DoubleSharp,
PitchTransform.DoubleSharp,
PitchTransform.Sharp
};
var keysteps = new PitchTransform[] {
PitchTransform.DoubleSharp,
PitchTransform.DoubleSharp,
PitchTransform.Sharp,
PitchTransform.DoubleSharp,
PitchTransform.DoubleSharp,
PitchTransform.DoubleSharp,
PitchTransform.Sharp
};
var mode_copy = mode;
while (mode_copy != Mode.Major)
{
// rotate L one step
var step0 = modesteps[0];
for (int i = 1; i < modesteps.Length; i++)
{
modesteps[i - 1] = modesteps[i];
}
modesteps[modesteps.Length - 1] = step0;
mode_copy = (Mode)((int)mode_copy - 1);
}
var key_copy = key;
while (key_copy != DiatonicToneClass.C)
{
// rotate L one step
var step0 = keysteps[0];
for (int i = 1; i < keysteps.Length; i++)
{
keysteps[i - 1] = keysteps[i];
}
keysteps[keysteps.Length - 1] = step0;
key_copy = (DiatonicToneClass)((int)key_copy - 1);
}
var signature =
new KeySignature();
var pitch = key.GetPitchClass();
for (int i = 0; i < 7; i++)
{
signature[key] = transform;
transform += modesteps[i];
transform -= keysteps[i];
//TODO: should modesteps[i] or transform be used here
pitch = modesteps[i].Transform(pitch);
key = key.ToRight();
}
return(signature);
}
