void SampleEditor::tool_generateNoise(const FilterParameters* par)
{
	if (isEmptySample())
		return;

	pp_int32 sStart = selectionStart;
	pp_int32 sEnd = selectionEnd;

	if (hasValidSelection())
	{
		if (sStart >= 0 && sEnd >= 0)
		{
			if (sEnd < sStart)
			{
				pp_int32 s = sEnd; sEnd = sStart; sStart = s;
			}
		}
	}
	else
	{
		sStart = 0;
		sEnd = sample->samplen;
	}

	preFilter(&SampleEditor::tool_generateNoise, par);

	prepareUndo();

	pp_int32 i;

	pp_int32 type = par->getParameter(0).intPart;

	VRand rand;
	rand.seed();

	switch (type)
	{
		case 0:
			for (i = sStart; i < sEnd; i++)
				setFloatSampleInWaveform(i, rand.white()*2.0f);
			break;
		case 1:
			for (i = sStart; i < sEnd; i++)
				setFloatSampleInWaveform(i, rand.pink()*2.0f);
			break;
		case 2:
			for (i = sStart; i < sEnd; i++)
				setFloatSampleInWaveform(i, rand.brown()*2.0f);
			break;
	}

	finishUndo();

	postFilter();
}

void SampleEditor::tool_generateSine(const FilterParameters* par)
{
	if (isEmptySample())
		return;

	pp_int32 sStart = selectionStart;
	pp_int32 sEnd = selectionEnd;

	if (hasValidSelection())
	{
		if (sStart >= 0 && sEnd >= 0)
		{
			if (sEnd < sStart)
			{
				pp_int32 s = sEnd; sEnd = sStart; sStart = s;
			}
		}
	}
	else
	{
		sStart = 0;
		sEnd = sample->samplen;
	}

	preFilter(&SampleEditor::tool_generateSine, par);

	mp_sint32 sLen = sEnd - sStart;

	prepareUndo();

	pp_int32 i;

	const float numPeriods = (float)(6.283185307179586476925286766559 * par->getParameter(1).floatPart);
	const float amplify = par->getParameter(0).floatPart;

	// generate sine wave here
	for (i = sStart; i < sEnd; i++)
	{
		float per = (i-sStart)/(float)sLen * numPeriods;
		setFloatSampleInWaveform(i, (float)sin(per)*amplify);
	}

	finishUndo();

	postFilter();
}

void SampleEditor::tool_generateSquare(const FilterParameters* par)
{
	if (isEmptySample())
		return;

	pp_int32 sStart = selectionStart;
	pp_int32 sEnd = selectionEnd;

	if (hasValidSelection())
	{
		if (sStart >= 0 && sEnd >= 0)
		{
			if (sEnd < sStart)
			{
				pp_int32 s = sEnd; sEnd = sStart; sStart = s;
			}
		}
	}
	else
	{
		sStart = 0;
		sEnd = sample->samplen;
	}

	preFilter(&SampleEditor::tool_generateSquare, par);

	mp_sint32 sLen = sEnd - sStart;

	prepareUndo();

	pp_int32 i;

	const float numPeriods = par->getParameter(1).floatPart;
	const float amplify = par->getParameter(0).floatPart;

	// generate square wave here
	for (i = sStart; i < sEnd; i++)
	{
		float per = (i-sStart)/(float)sLen * numPeriods;
		float frac = per-(float)floor(per);
		setFloatSampleInWaveform(i, frac < 0.5f ? amplify : -amplify);
	}

	finishUndo();

	postFilter();
}

void SampleEditor::tool_generateTriangle(const FilterParameters* par)
{
	if (isEmptySample())
		return;

	pp_int32 sStart = selectionStart;
	pp_int32 sEnd = selectionEnd;

	if (hasValidSelection())
	{
		if (sStart >= 0 && sEnd >= 0)
		{
			if (sEnd < sStart)
			{
				pp_int32 s = sEnd; sEnd = sStart; sStart = s;
			}
		}
	}
	else
	{
		sStart = 0;
		sEnd = sample->samplen;
	}

	preFilter(&SampleEditor::tool_generateTriangle, par);

	mp_sint32 sLen = sEnd - sStart;

	prepareUndo();

	pp_int32 i;

	const float numPeriods = par->getParameter(1).floatPart;
	const float amplify = par->getParameter(0).floatPart;

	// generate triangle wave here
	for (i = sStart; i < sEnd; i++)
	{
		float per = (i-sStart)/(float)sLen * numPeriods;
		float frac = per-(float)floor(per);
		if (frac < 0.25f)
			setFloatSampleInWaveform(i, (frac*4.0f)*amplify);
		else if (frac < 0.75f)
			setFloatSampleInWaveform(i, (1.0f-(frac-0.25f)*4.0f)*amplify);
		else
			setFloatSampleInWaveform(i, (-1.0f+(frac-0.75f)*4.0f)*amplify);
	}

	finishUndo();

	postFilter();
}

void SampleEditor::tool_generateSawtooth(const FilterParameters* par)
{
	if (isEmptySample())
		return;

	pp_int32 sStart = selectionStart;
	pp_int32 sEnd = selectionEnd;

	if (hasValidSelection())
	{
		if (sStart >= 0 && sEnd >= 0)
		{
			if (sEnd < sStart)
			{
				pp_int32 s = sEnd; sEnd = sStart; sStart = s;
			}
		}
	}
	else
	{
		sStart = 0;
		sEnd = sample->samplen;
	}

	preFilter(&SampleEditor::tool_generateSawtooth, par);

	mp_sint32 sLen = sEnd - sStart;

	prepareUndo();

	pp_int32 i;

	const float numPeriods = par->getParameter(1).floatPart;
	const float amplify = par->getParameter(0).floatPart;

	// generate saw-tooth wave here
	for (i = sStart; i < sEnd; i++)
	{
		float per = (i-sStart)/(float)sLen * numPeriods;
		float frac = per-(float)floor(per);
		setFloatSampleInWaveform(i, frac < 0.5f ? (frac*2.0f)*amplify : (-1.0f+((frac-0.5f)*2.0f))*amplify);
	}

	finishUndo();

	postFilter();
}