Method setWaveToTriangle

src/gui/widgets/Graph.cpp:531–540

void graphModel::setWaveToTriangle()
{
	for( int i = 0; i < length(); i++ )
	{
		m_samples[i] = Oscillator::triangleSample(
				i / static_cast<float>( length() ) );
	}

	emit samplesChanged( 0, length() - 1 );
};