private void AddAssociationArrow(StylusPoint firstPoint, StylusPoint lastPoint)
{
Point pointOnStroke = GetPointForArrow(new Coordinates(firstPoint.ToPoint()), new Coordinates(lastPoint.ToPoint()), 10);
Point actualArrowPoint1 = rotatePointAroundPoint(pointOnStroke, firstPoint.ToPoint(), 45);
Point actualArrowPoint2 = rotatePointAroundPoint(pointOnStroke, firstPoint.ToPoint(), -45);
StylusPoints.Add(new StylusPoint(actualArrowPoint1.X, actualArrowPoint1.Y));
StylusPoints.Add(StylusPoints[0]);
StylusPoints.Add(new StylusPoint(actualArrowPoint2.X, actualArrowPoint2.Y));
StylusPoints.Add(StylusPoints[0]);
}
//private void StudentInkCanvas_SpeedCheckedEvent(object sender, StudentInkCanvas.SpeedCheckedEventArgs e)
//{
// IsSpeedChecked = e.state;
//}
#endregion
#region overrides
protected override void OnStylusDown(RawStylusInput rawStylusInput)
{
base.OnStylusDown(rawStylusInput);
Stroke tempStroke = new Stroke(rawStylusInput.GetStylusPoints());
//if the styluspoints is not empty
if (tempStroke.StylusPoints.Count >= 0)
{
//get the stroke thats the animation is running on
ExpertStroke = ExpertStrokeCollection[StudentStrokeCount];
//set the first point of the stroke as the expert reference point
ExpertStylusPoint = ExpertStroke.StylusPoints.First();
if (tempStroke.HitTest(ExpertStylusPoint.ToPoint(), HitThreshold))
{
foreach (StylusPoint sp in tempStroke.StylusPoints)
{
hitChangedPoints.Add(sp.ToPoint());
}
StrokeColor = Color.FromArgb(255, 0, 255, 0);
}
else
{
StrokeColor = Color.FromArgb(255, 255, 0, 0);
}
}
}
private void MoveDotAndRobotToStylusPoint(StylusPoint stylusPt)
{
var pt = stylusPt.ToPoint();
if (dot.Visibility == Visibility.Visible)
{
dotTranslateTransform.X = pt.X - (inkCanvas.ActualWidth / 2);
dotTranslateTransform.Y = pt.Y - (inkCanvas.ActualHeight / 2);
}
//TODO :: handle case where drawDimensionSize is less than the inkCanvas.Strokes size
// Apply the scalingFactor to the point that the robot will draw.
// FOR TESTING
if (!isShowingDrawZone)
{
// get the scaleFactor between the (inkSize + (drawDimensionSize - inkSize))
// and the actual inkSize.
// TODO :: establish a new origin to be the Top Left of the Draw Rectangle
double scaleFactorX = (drawZoneRect.Width / (inkCanvas.ActualWidth));
double scaleFactorY = (drawZoneRect.Height / (inkCanvas.ActualHeight));
pt.X = (pt.X * scaleFactorX) + drawZoneRect.Left;
pt.Y = (pt.Y * scaleFactorY) + drawZoneRect.Top;
}
// Send the point to the robot too.
// Leave the arm in its current down state.
RobotArm.Move(pt);
}
private void MoveDotAndRobotToStylusPoint(StylusPoint stylusPt)
{
var pt = stylusPt.ToPoint();
if (dot.Visibility == Visibility.Visible)
{
dotTranslateTransform.X = pt.X - (inkCanvas.ActualWidth / 2);
dotTranslateTransform.Y = pt.Y - (inkCanvas.ActualHeight / 2);
}
// Send the point to the robot too.
RobotArm.Move(pt);
}
protected Point GetTheRightBottomPoint()
{
if (StylusPoints == null)
{
throw new ArgumentNullException("StylusPoints");
}
StylusPoint tmpPoint = new StylusPoint(0, 0);
foreach (StylusPoint point in StylusPoints)
{
if ((point.X > tmpPoint.X) || (point.Y > tmpPoint.Y))
{
tmpPoint = point;
}
}
return(tmpPoint.ToPoint());
}
protected Point GetTheLeftTopPoint()
{
if (StylusPoints == null)
{
throw new ArgumentNullException("StylusPoints");
}
StylusPoint tmpPoint = new StylusPoint(double.MaxValue, double.MaxValue);
foreach (StylusPoint point in StylusPoints)
{
if ((point.X < tmpPoint.X) || (point.Y < tmpPoint.Y))
{
tmpPoint = point;
}
}
return(tmpPoint.ToPoint());
}
// resample the stroke into point set with constant inter-distance
private void ResampleStrokes(int pass)
{
// initial the variable
m_resampleTime = new double[500];
m_numS = 0;
m_meanTime = 0;
// init number of raw points between two resampled points
int numBetween = 0;
// compute the diagonal of the stroke's bounding box
Rect bound = m_stroke.GetBounds();
double diag = GetDistance(bound.TopLeft, bound.BottomRight);
// set the distance between resampled poits to be 1/40 of the diagonal
m_cellDist = diag / 40;
// resample the points
double m_length = 0;
int preIndex = 0;
// pass 0: the first resampled points is the start point of the stroke
if (pass == 0)
{
m_resamplePoints.Add(m_stroke.StylusPoints[0].ToPoint());
m_resampleTime[m_numS] = 0;
m_numS++;
}
// compute other resampled points
for (int i = 1; i < m_numP; i++)
{
numBetween++;
// compute the distance between ajacent two raw points in the stroke
double dist = GetDistance(m_stroke.StylusPoints[i - 1].ToPoint(), m_stroke.StylusPoints[i].ToPoint());
// check the distance between the last resampled point and the visiting raw points
if (m_length + dist >= m_cellDist ||
(pass == 1 && m_numS == 0 && m_length + dist >= m_cellDist / 2.0))
{
// add a new point to the resampled points
Point newPoint = new Point();
StylusPoint preP = m_stroke.StylusPoints[i - 1];
StylusPoint curP = m_stroke.StylusPoints[i];
// compute the position of the new resampled point
if (pass == 1 && m_numS == 0)
{
// first shifted resampled point
newPoint.X = preP.X + ((m_cellDist / 2.0 - m_length) / dist) * (curP.X - preP.X);
newPoint.Y = preP.Y + ((m_cellDist / 2.0 - m_length) / dist) * (curP.Y - preP.Y);
}
else
{
// other resampled points
newPoint.X = preP.X + ((m_cellDist - m_length) / dist) * (curP.X - preP.X);
newPoint.Y = preP.Y + ((m_cellDist - m_length) / dist) * (curP.Y - preP.Y);
}
m_resamplePoints.Add(newPoint);
// compute the distance from the new resampled point to the raw point i
m_length = GetDistance(newPoint, curP.ToPoint());
// compute time for each resampled point
m_resampleTime[m_numS] = m_time[i] - m_time[preIndex];
if (m_resampleTime[m_numS] < 0)
{
m_resampleTime[m_numS] = 0;
}
// compute the mean time of the resampled points
m_meanTime += m_resampleTime[m_numS];
// add extra resampled points between newPoint and raw point i
preIndex = i;
numBetween = 0;
m_numS++;
// make sure m_length is less than m_cellDist
while (m_length > m_cellDist)
{
// find all possible resampled point befor i
newPoint.X += (m_cellDist / dist) * (curP.X - preP.X);
newPoint.Y += (m_cellDist / dist) * (curP.Y - preP.Y);
m_resamplePoints.Add(newPoint);
m_length -= m_cellDist;
// compute time for each resampled point
m_resampleTime[m_numS] = m_time[i] - m_time[i - 1];
if (m_resampleTime[m_numS] < 0)
{
m_resampleTime[m_numS] = 0;
}
// compute the mean time of the resampled points
m_meanTime += m_resampleTime[m_numS];
m_numS++;
}
}
else
{
// get the last resampled point
m_length += dist;
if ((m_length > m_cellDist) && (i == m_numP - 1))
{
m_resamplePoints.Add(m_stroke.StylusPoints[i].ToPoint());
m_resampleTime[m_numS] = m_time[i] - m_time[preIndex];
m_numS++;
}
}
}
// compute mean time of resampled point
m_meanTime /= m_numS;
}
protected override void OnStylusMoveProcessed(object callbackData, bool targetVerified)
{
// Check that the element actually receive the OnStylusUp input.
if (targetVerified)
{
//Debug.WriteLine("StudentDynamicRendrer/StudentStrokeCount : " + StudentStrokeCount);
StylusPointCollection spc = callbackData as StylusPointCollection;
//pass the points into a stroke to find the neartest stroke
Stroke tempStroke = new Stroke(spc);
//if the expert stroke is loaded
if (IsExpertStrokeLoaded == true)
{
//get the expert strokes collection that are overlapping with the current ink stroke
//StrokeCollection tempStrokeCollection = SelectBoundingStrokeCollection(tempStroke, ExpertStrokeCollection);
//if the tempstrokecollection returns empty exit the method.
//if (tempStrokeCollection.Count > 0)
//{
//get the stylusPoint and the stroke over lapping the pen point from the tempStrokeCollection
//Stroke ExpertStroke = ExpertStrokeCollection[StudentStrokeCount];
//set the first point of the stroke as the
//ExpertStylusPoint = ExpertStroke.StylusPoints.First();
//ExpertStylusPoint = SelectNearestExpertPoint(tempStroke, tempStrokeCollection, out ExpertStroke);
//raise the event that the nearest expert point is selected
//NearestExpertStylusPointCalculatedEventArgs args = new NearestExpertStylusPointCalculatedEventArgs();
//args.styluspoint = ExpertStylusPoint;
//args.stroke = ExpertStroke;
//OnNearestExpertStylusPointCalculated(args);
//if StrokeFeedback is requested
if (IsStrokeChecked == true)
{
if (tempStroke.HitTest(ExpertStylusPoint.ToPoint(), HitThreshold))
{
foreach (StylusPoint sp in tempStroke.StylusPoints)
{
hitChangedPoints.Add(sp.ToPoint());
}
StrokeColor = Color.FromArgb(255, 0, 255, 0);
}
else
{
StrokeColor = Color.FromArgb(255, 255, 0, 0);
}
}
//If Pressure is checked change the color of the Stroke
if (IsPressureChecked == true)
{
List <float> pressureFactorList = new List <float>();
foreach (StylusPoint s in tempStroke.StylusPoints)
{
pressureFactorList.Add(s.PressureFactor);
}
float StudentPressureFactor = pressureFactorList.Average();
//multiplier to darken or lighen the PreviousColor
float ExpertPressureFactor = ExpertStylusPoint.PressureFactor;
//if pressure is higher produce darker color by passing negetive number
float ColorWeight = ExpertPressureFactor - StudentPressureFactor;
StrokeColor = ChangeColorBrightness(StrokeColor, ColorWeight);
}
//}
}
}
}