public void drawRienmann(NodeHolder function, int deltaX, double fromX, double toX)
{
//clearing previous function and setting up variables------------------------
lastDrawnFunction = function;
this.fromX = fromX;
this.toX = toX;
this.deltaX = deltaX;
bool newSerieHasBeenUsed = false;
for (int i = 0; i < myChart.Series.Count; i++)
{
if (myChart.Series[i].Color == RienmannColor)
{
myChart.Series[i].Points.Clear();
}
}
rienmannHasBeenDrawn = false;
int serieCounter = nextSerie(RienmannColor, -1);
//drawing the new function-------------------------------------------
double answerTemp;
double totalDistance = (toX - fromX);
double deltaDistance = totalDistance / deltaX; //niet nauwkeurig!!
//double halfDeltaDistance = deltaDistance / 2;
double XStartPosition;
for (int i = 0; i < deltaX; i++)
{
//try
//{
XStartPosition = fromX + i * deltaDistance;
answerTemp = function.GetFunctionOutputForX(fromX + (totalDistance + totalDistance * i * 2) / (deltaX * 2));
if (answerTemp > myChart.ChartAreas[0].AxisY.Maximum)
{
answerTemp = myChart.ChartAreas[0].AxisY.Maximum + Math.Abs(myChart.ChartAreas[0].AxisY.Maximum) * 0.1;
}
if (answerTemp < myChart.ChartAreas[0].AxisY.Minimum)
{
answerTemp = myChart.ChartAreas[0].AxisY.Minimum - Math.Abs(myChart.ChartAreas[0].AxisY.Minimum) * 0.1;
}
myChart.Series[serieCounter].Points.AddXY(XStartPosition, 0);
myChart.Series[serieCounter].Points.AddXY(XStartPosition, answerTemp);
myChart.Series[serieCounter].Points.AddXY(XStartPosition + deltaDistance, answerTemp);
myChart.Series[serieCounter].Points.AddXY(XStartPosition + deltaDistance, 0);
myChart.Series[serieCounter].Points.AddXY(XStartPosition, 0);
//}
//catch
//{
// if (newSerieHasBeenUsed)
// {
// serieCounter = nextSerie(functionColor, serieCounter);
// newSerieHasBeenUsed = false;
// }
//}
}
rienmannHasBeenDrawn = true;
}
private void btnCalculateForX_Click(object sender, EventArgs e)
{
if (lastSelectedFunction != null)
{
try
{
double xValue = Convert.ToDouble(tbXValue.Text);
double answer = lastSelectedFunction.GetFunctionOutputForX(xValue);
lblCalculateForXAnswer.Text = answer.ToString();
}
catch
{
lblCalculateForXAnswer.Text = "Not Possible!";
}
}
}
public void drawNewton(NodeHolder function)
{
//clearing previous function and setting up variables------------------------
lastDrawnFunction = function;
bool newSerieHasBeenUsed = false;
bool yBetweenMaxAndMin = false;
bool previousAnswerWasPossible = false;
double xDistance = myChart.ChartAreas[0].AxisX.Maximum / 1000;
if (true) //FAST RENDER = false OR ACCURATE RENDER = true
{
xDistance = 0.01f;
}
for (int i = 0; i < myChart.Series.Count; i++)
{
if (myChart.Series[i].Color == newtonColor && myChart.Series[i].ChartType == SeriesChartType.Line)
{
myChart.Series[i].Points.Clear();
}
}
newtonHasBeenDrawn = false;
int serieCounter = nextSerie(newtonColor, -1);
//drawing the new function-------------------------------------------
for (double i = myChart.ChartAreas[0].AxisX.Minimum; i <= myChart.ChartAreas[0].AxisX.Maximum; i += xDistance)
{
try
{
double answer = 0;
answer = (function.GetFunctionOutputForX(i + 0.01f) - function.GetFunctionOutputForX(i)) / 0.01f;
if (answer >= myChart.ChartAreas[0].AxisY.Minimum && answer <= myChart.ChartAreas[0].AxisY.Maximum)
{
myChart.Series[serieCounter].Points.AddXY(i, answer); //DRAW CURRENT
if (previousAnswerWasPossible && !yBetweenMaxAndMin) //current point is between min/max, but previous was not, DRAW PREVIOUS
{
answer = (function.GetFunctionOutputForX(i - xDistance + 0.01f) - function.GetFunctionOutputForX(i - xDistance)) / 0.01f;
myChart.Series[serieCounter].Points.AddXY(i - xDistance, answer);
}
newSerieHasBeenUsed = true;
yBetweenMaxAndMin = true;
}
else if (yBetweenMaxAndMin) //previous answer was between max/min, DRAW ONE MORE AND START NEW SERIE
{
myChart.Series[serieCounter].Points.AddXY(i, answer);
serieCounter = nextSerie(newtonColor, serieCounter);
newSerieHasBeenUsed = false;
yBetweenMaxAndMin = false;
}
else
{
if (newSerieHasBeenUsed)
{
serieCounter = nextSerie(newtonColor, serieCounter);
newSerieHasBeenUsed = false;
yBetweenMaxAndMin = false;
}
}
previousAnswerWasPossible = true;
}
catch
{
if (newSerieHasBeenUsed)
{
serieCounter = nextSerie(newtonColor, serieCounter);
newSerieHasBeenUsed = false;
}
previousAnswerWasPossible = false;
}
}
newtonHasBeenDrawn = true;
myChart.Invalidate();
}