/**
* Check list of strokes to see if any can be combined by checking to see if
* together they pass a line test
*
* @param strokes
* strokes to check
* @return merged/combined strokes
*/
private List <StylusPointCollection> combineLineTest(List <StylusPointCollection> strokes)
{
if (strokes.Count <= 1)
{
return(strokes);
}
for (int i = 1; i < strokes.Count; i++)
{
StylusPointCollection newStroke = combine(strokes[i - 1], strokes[i]);
Recognizer newFeatures;
newFeatures = new Recognizer(newStroke);
LineFit lineFit = new LineFit();
lineFit.FitTest(newFeatures, true);
if (lineFit.passed())
{
// System.out.println("line fit: " + lineFit.m_err + " lsqe = "
// + lineFit.m_lsqe/lineFit.m_features.getStrokeLength() +
// " ratio = " + lineFit.m_ratio);
strokes.RemoveAt(i - 1);
strokes.RemoveAt(i - 1);
strokes.Insert(i - 1, newStroke);
strokes = combineLineTest(strokes);
}
}
return(strokes);
}
internal void Test()
{
m_allLinesPassed = true;
m_err = 0;
m_lsqe = 0;
m_subStrokes = GetSegments();
m_subStrokesLength = new List <double>(m_subStrokes.Count);
// check for small, extraneous lines in interpretation
if (SMALL_POLYLINE_COMBINE &&
m_subStrokes.Count < 10)
{
m_subStrokes = combineSmallLines(m_subStrokes);
}
//// System.out.println("num substrokes = " + m_subStrokes.size());
//// check for consecutive lines with similar slopes, combine if similar
if (SIM_SLOPE_POLYLINE_COMBINE)
{
m_subStrokes = combineSimilarSlopes(m_subStrokes);
}
//// System.out.println("num substrokes = " + m_subStrokes.size());
//// check for consecutive lines that, when combined, pass a line test
if (LINE_TEST_COMBINE && m_subStrokes.Count > 2)
{
m_subStrokes = combineLineTest(m_subStrokes);
}
// test 1: we need at least 2 substrokes
if (m_subStrokes.Count < 2)
{
m_passed = false;
m_fail = 0;
}
else
{
// test 2: run line test on all sub strokes and get a cumulative
// error
for (int i = 0; i < m_subStrokes.Count; i++)
{
// if we have 2 or fewer points we automatically have a line
if (m_subStrokes[i].Count > 1)
{
LineFit lf = new LineFit();
lf.getFit(m_subStrokes[i]);
m_subStrokesLength.Add(lf.lineLength);
m_err += lf.getError();
m_lsqe += lf.getLSQE();
//m_subshapes.add(lf.getShape());
if (!lf.passed())
{
m_allLinesPassed = false;
m_passed = false;
m_fail = 1;
}
else
{
m_numPassed++;
}
}
else
{
m_numPassed++;
}
}
m_err /= recognizer.getStrokeLength();
m_lsqe /= recognizer.getStrokeLength();
// dcr should be high
if (recognizer.getDCR() < M_DCR_TO_BE_POLYLINE)
{
m_passed = false;
m_fail = 2;
}
// test 3.2: if total lsqe is low then accept even if not all
// substrokes passed polyline test
if (m_lsqe < M_POLYLINE_LS_ERROR)
{// || m_allLinesPassed)
m_passed = true;
m_fail = 3;
}
}
// calcular avg angular direction
double sum = 0.0;
foreach (var s in m_subStrokes)
{
sum += Math.Abs(angularDirection(s));
}
m_avgAngularDirection = (sum * 180.0) / (m_subStrokes.Count * Math.PI);
}