// Inputs are absolute note indices from beginning of song.
public void DeleteNotesBetween(int minFrame, int maxFrame, bool preserveFx = false)
{
var patternIdxMin = Song.FindPatternInstanceIndex(minFrame, out var patternNoteIdxMin);
var patternIdxMax = Song.FindPatternInstanceIndex(maxFrame, out var patternNoteIdxMax);
if (patternIdxMin == patternIdxMax)
{
if (patternIdxMin < song.Length)
{
var pattern = patternInstances[patternIdxMin];
if (pattern != null)
{
pattern.DeleteNotesBetween(patternNoteIdxMin, patternNoteIdxMax, preserveFx);
pattern.ClearLastValidNoteCache();
}
}
}
else
{
for (int p = patternIdxMin; p <= patternIdxMax && p < song.Length; p++)
{
var pattern = patternInstances[p];
if (pattern != null)
{
if (p == patternIdxMin)
{
pattern.DeleteNotesBetween(patternNoteIdxMin, Pattern.MaxLength, preserveFx);
}
else if (p == patternIdxMax)
{
pattern.DeleteNotesBetween(0, patternNoteIdxMax, preserveFx);
}
else
{
if (preserveFx)
{
pattern.DeleteNotesBetween(0, Pattern.MaxLength, true);
}
else
{
pattern.Notes.Clear();
}
}
pattern.ClearLastValidNoteCache();
}
}
}
}