private void textBoxNewFinal_TextChanged(object sender, EventArgs e)
{
recalcReentranceGuard++;
try
{
if (recalcReentranceGuard == 1)
{
// reverse-engineer other parameters from this desired value
double duration;
Double.TryParse(textBoxDuration.Text, out duration);
double initial, final;
Double.TryParse(textBoxInitial.Text, out initial);
Double.TryParse(textBoxFinal.Text, out final);
double newEnd;
Double.TryParse(textBoxEndOffset.Text, out newEnd);
double newFinal;
Double.TryParse(textBoxNewFinal.Text, out newFinal);
bool exponential = comboBoxFunction.SelectedIndex != 0;
if (!exponential)
{
// linear
newEnd = (newFinal - initial) / (final - initial);
}
else
{
// exponential
double initialDecibels = Synthesizer.ExpSegEndpointToLog(initial);
double finalDecibels = Synthesizer.ExpSegEndpointToLog(final);
double newFinalDecibels = Synthesizer.ExpSegEndpointToLog(newFinal);
newEnd = (newFinalDecibels - initialDecibels) / (finalDecibels - initialDecibels);
}
textBoxEndOffset.Text = newEnd.ToString();
}
}
finally
{
recalcReentranceGuard--;
}
Recalculate(false /*updateInitialFinal*/);
}
private double F(double x) // x normalized to [0..1]
{
if (!exponential)
{
return(initial + x * (final - initial));
}
else
{
double logInitial = Synthesizer.ExpSegEndpointToLog(initial);
double logFinal = Synthesizer.ExpSegEndpointToLog(final);
double y = logInitial + x * (logFinal - logInitial);
return(Synthesizer.ExpSegEndpointToLinear(y));
}
}
private void Recalculate(bool updateInitialFinal)
{
recalcReentranceGuard++;
try
{
if (recalcReentranceGuard == 1)
{
double duration;
Double.TryParse(textBoxDuration.Text, out duration);
double initial, final;
Double.TryParse(textBoxInitial.Text, out initial);
Double.TryParse(textBoxFinal.Text, out final);
double newStart, newEnd;
Double.TryParse(textBoxStartOffset.Text, out newStart);
Double.TryParse(textBoxEndOffset.Text, out newEnd);
bool exponential = comboBoxFunction.SelectedIndex != 0;
double newInitial, newFinal;
if (!exponential)
{
// linear
newInitial = initial + newStart * (final - initial);
newFinal = initial + newEnd * (final - initial);
}
else
{
// exponential
double initialDecibels = Synthesizer.ExpSegEndpointToLog(initial);
double finalDecibels = Synthesizer.ExpSegEndpointToLog(final);
newInitial = initialDecibels + newStart * (finalDecibels - initialDecibels);
newFinal = initialDecibels + newEnd * (finalDecibels - initialDecibels);
newInitial = Synthesizer.ExpSegEndpointToLinear(newInitial);
newFinal = Synthesizer.ExpSegEndpointToLinear(newFinal);
}
newInitial = Math.Round(newInitial, 8);
newFinal = Math.Round(newFinal, 8);
if (updateInitialFinal)
{
textBoxNewInitial.Text = newInitial.ToString();
textBoxNewFinal.Text = newFinal.ToString();
}
statement = String.Format(
"delay {0} level {1}{2};",
duration * (newEnd - newStart),
newFinal,
exponential ? " exponential" : String.Empty);
textBoxStatement.Text = String.Format(
"[{0}]: {1}",
newInitial,
statement);
segmentCalculatorGraph.Update(initial, final, duration, newStart, newEnd, exponential);
savedInitial = initial;
savedDelay = duration;
savedFinal = final;
savedExponential = exponential;
savedNewStart = newStart;
savedNewEnd = newEnd;
}
}
finally
{
recalcReentranceGuard--;
}
}