C++ MLSignal::getHeight方法代码示例

// add the entire signal b to this signal, at the subpixel destination offset. 
// 
void MLSignal::add2D(const MLSignal& b, const Vec2& destOffset)
{
	MLSignal& a = *this;
		
	Vec2 iDestOffset, fDestOffset;
	destOffset.getIntAndFracParts(iDestOffset, fDestOffset);
	
	int destX = iDestOffset[0];
	int destY = iDestOffset[1];	
	float srcPosFX = fDestOffset[0];
	float srcPosFY = fDestOffset[1];
	
	MLRect srcRect(0, 0, b.getWidth() + 1, b.getHeight() + 1); // add (1, 1) for interpolation
	MLRect destRect = srcRect.translated(iDestOffset).intersect(getBoundsRect());
	
	for(int j=destRect.top(); j<destRect.bottom(); ++j)
	{
		for(int i=destRect.left(); i<destRect.right(); ++i)
		{
			a(i, j) += b.getInterpolatedLinear(i - destX - srcPosFX, j - destY - srcPosFY);
		}
	}

	setConstant(false);
}

// a simple pixel-by-pixel measure of the distance between two signals.
//
float rmsDifference2D(const MLSignal& a, const MLSignal& b)
{
	int w = min(a.getWidth(), b.getWidth());
	int h = min(a.getHeight(), b.getHeight());
	float sum = 0.;
	float d;
	for(int j=0; j<h; ++j)
	{
		for(int i=0; i<w; ++i)
		{
			d = a(i, j) - b(i, j);
			sum += d*d;
		}
	}
	sum /= w*h;
	sum = sqrtf(sum);
	return sum;
}

void TouchTracker::Calibrator::setCalibration(const MLSignal& v)
{
	if((v.getHeight() == kTemplateSize) && (v.getWidth() == kTemplateSize))
	{
        mCalibrateSignal = v;
        mHasCalibration = true;
    }
    else
    {
		MLConsole() << "TouchTracker::Calibrator::setCalibration: bad size, restoring default.\n";
        mHasCalibration = false;
    }
}

// setFrame() - set the 2D frame i to the incoming signal.
void MLSignal::setFrame(int i, const MLSignal& src)
{
	// only valid for 3D signals
	assert(is3D());
	
	// source must be 2D
	assert(src.is2D());
	
	// src signal should match our dimensions
	if((src.getWidth() != mWidth) || (src.getHeight() != mHeight))
	{
		return;
	}
	
	MLSample* pDestFrame = mDataAligned + plane(i);
	const MLSample* pSrc = src.getConstBuffer();
	std::copy(pSrc, pSrc + src.getSize(), pDestFrame);
}

// expire or move existing touches based on new signal input. 
// 
void TouchTracker::updateTouches(const MLSignal& in)
{
	// copy input signal to border land
	int width = in.getWidth();
	int height = in.getHeight();
	
	mTemp.copy(in);
	mTemplateMask.clear();
	
	// sort active touches by Z
	// copy into sorting container, referring back to unsorted touches
	int activeTouches = 0;
	for(int i = 0; i < mMaxTouchesPerFrame; ++i)
	{
		Touch& t = mTouches[i];
		if (t.isActive())
		{
			t.unsortedIdx = i;
			mTouchesToSort[activeTouches++] = t;
		}
	}

	std::sort(mTouchesToSort.begin(), mTouchesToSort.begin() + activeTouches, compareTouchZ());

	// update active touches in sorted order, referring to existing touches in place
	for(int i = 0; i < activeTouches; ++i)
	{
		int refIdx = mTouchesToSort[i].unsortedIdx;
		Touch& t = mTouches[refIdx];
		Vec2 pos(t.x, t.y); 
		Vec2 newPos = pos;
		float newX = t.x;
		float newY = t.y;
		float newZ = in.getInterpolatedLinear(pos);
		
		// if not preparing to remove, update position.
		if (t.releaseCtr == 0)
		{
			Vec2 minPos(0, 0);
			Vec2 maxPos(width, height);
			int ix = floor(pos.x() + 0.5f);
			int iy = floor(pos.y() + 0.5f);		
			
			// move to any higher neighboring integer value
			Vec2 newPeak;
			newPeak = adjustPeak(mTemp, ix, iy);			
			Vec2 newPeakI, newPeakF;
			newPeak.getIntAndFracParts(newPeakI, newPeakF);
			int newPx = newPeakI.x();
			int newPy = newPeakI.y();
			
			// get exact location and new key
			Vec2 correctPos = mTemp.correctPeak(newPx, newPy);
			newPos = correctPos;	
			int newKey = getKeyIndexAtPoint(newPos);												
			
			// move the touch.  
			if((newKey == t.key) || !keyIsOccupied(newKey))
			{			
				// This must be the only place a touch can move from key to key.
				pos = newPos;
				newX = pos.x();
				newY = pos.y();					
				t.key = newKey;
			}							
		}
		
		// look for reasons to release
		newZ = in.getInterpolatedLinear(newPos);
		bool thresholdTest = (newZ > mOffThreshold);			
		float inhibit = getInhibitThreshold(pos);
		bool inhibitTest = (newZ > inhibit);
		t.tDist = mCalibrator.differenceFromTemplateTouchWithMask(mTemp, pos, mTemplateMask);
		bool templateTest = (t.tDist < mTemplateThresh);
		bool overrideTest = (newZ > mOverrideThresh);
						
		t.age++;

		// handle release		
		// TODO get releaseDetect: evidence that touch has been released.
		// from matching release curve over ~ 50 samples. 
		if (!thresholdTest || (!templateTest && !overrideTest) || (!inhibitTest))
		{			
			/* debug
			if(!thresholdTest && (t.releaseCtr == 0))
			{
				debug() << refIdx << " REL thresholdFail: " << newZ << " at " << pos << "\n";	
			}
			if(!inhibitTest && (t.releaseCtr == 0))
			{
				debug() << refIdx << " REL inhibitFail: " << newZ << " < " << inhibit << "\n";	
			}
			if(!templateTest && (t.releaseCtr == 0))
			{
				debug() << refIdx << " REL templateFail: " << t.tDist << " at " << pos << "\n";	
			}			
			*/
			if(t.releaseCtr == 0)
//.........这里部分代码省略.........

// if any neighbors of the input coordinates are higher, move the coordinates there.
//
Vec2 TouchTracker::adjustPeak(const MLSignal& in, int xp, int yp)
{
	int width = in.getWidth();
	int height = in.getHeight();
	
	int x = clamp(xp, 1, width - 2);
	int y = clamp(yp, 1, height - 2);
										
	float t = 0.0;
	int rx = x;
	int ry = y;
	float a = in(x - 1, y - 1);
	float b = in(x, y - 1);
	float c = in(x + 1, y - 1);
	float d = in(x - 1, y);
	float e = in(x, y);
	float f = in(x + 1, y);
	float g = in(x - 1, y + 1);
	float h = in(x, y + 1);
	float i = in(x + 1, y + 1);
	float fmax = e;
	
	if (y > 0)
	{
		if (a > fmax + t)
		{
//			debug() << "<^ ";
			fmax = a; rx = x - 1; ry = y - 1;		
		}
		if (b > fmax + t)
		{
//			debug() << "^ ";
			fmax = b; rx = x; ry = y - 1;		
		}
		if (c > fmax + t)
		{
//			debug() << ">^ ";
			fmax = c; rx = x + 1; ry = y - 1;		
		}
	}
	if (d > fmax + t)
	{
//		debug() << "<- ";
		fmax = d; rx = x - 1; ry = y;		
	}
	if (f > fmax + t)
	{
//		debug() << "-> ";
		fmax = f; rx = x + 1; ry = y;		
	}
	if (y < in.getHeight() - 1)
	{
		if (g > fmax + t)
		{
//			debug() << "<_ ";
			fmax = g; rx = x - 1; ry = y + 1;		
		}
		if (h > fmax + t)
		{
//			debug() << "_ ";
			fmax = h; rx = x; ry = y + 1;		
		}
		if (i > fmax + t)
		{
//			debug() << ">_ ";
			fmax = i; rx = x + 1; ry = y + 1;		
		}
	}
	return Vec2(rx, ry);
}

float TouchTracker::Calibrator::differenceFromTemplateTouchWithMask(const MLSignal& in, Vec2 pos, const MLSignal& mask)
{
	static float maskThresh = 0.001f;
	static MLSignal a2(kTemplateSize, kTemplateSize);
	static MLSignal b(kTemplateSize, kTemplateSize);
	static MLSignal b2(kTemplateSize, kTemplateSize);

	float r = 0.f;
	int height = in.getHeight();
	int width = in.getWidth();
	MLRect boundsRect(0, 0, width, height);
	
	// use linear interpolated z value from input
	float linearZ = in.getInterpolatedLinear(pos)*getZAdjust(pos);
	linearZ = clamp(linearZ, 0.00001f, 1.f);
	float z1 = 1./linearZ;	
	const MLSignal& a = getTemplate(pos);
	
	// get normalized input values surrounding touch
	int tr = kTemplateRadius;
	b.clear();
	for(int j=0; j < kTemplateSize; ++j)
	{
		for(int i=0; i < kTemplateSize; ++i)
		{
			Vec2 vInPos = pos + Vec2((float)i - tr,(float)j - tr);			
			if (boundsRect.contains(vInPos) && (mask.getInterpolatedLinear(vInPos) < maskThresh))
			{
				float inVal = in.getInterpolatedLinear(vInPos);
				inVal *= z1;
				b(i, j) = inVal;
			}
		}
	}
	
	int tests = 0;
	float sum = 0.;

	// add differences in z from template
	a2.copy(a);
	b2.copy(b);
	a2.partialDiffX();
	b2.partialDiffX();
	for(int j=0; j < kTemplateSize; ++j)
	{
		for(int i=0; i < kTemplateSize; ++i)
		{
			if(b(i, j) > 0.)
			{
				float d = a2(i, j) - b2(i, j);
				sum += d*d;
				tests++;
			}
		}
	}

	// get RMS difference
	if(tests > 0)
	{
		r = sqrtf(sum / tests);
	}	
	return r;
}