private void Draw(ZedGraphControl zgc, string expression, double from, double to, double step = 0.01f)
{
// Obtain GraphPane from ZedGraphControl
GraphPane pane = zgc.GraphPane;
int compileResult = LibraryBridge.CompileExpression(expression);
if (0 != compileResult)
{
MessageBox.Show(string.Format(@"Expression error on col {0}", compileResult), @"Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
tbExpression.Focus();
return;
}
// from MUST be less than to, ensure that
if (from.CompareTo(to) > 1)
{
double temp = from;
from = to;
to = temp;
}
double startValue = from,
endValue = to;
// Go to the library and get points
int pointsCount = LibraryBridge.CalculatePointsCount(startValue, endValue, step);
double[] points = new double[pointsCount];
IntPtr pointsPtr = LibraryBridge.GetFunctionPoints(startValue, endValue, step);
Marshal.Copy(pointsPtr, points, 0, pointsCount);
// Create the list...
PointPairList list1 = new PointPairList();
// ... and add points to the list.
// ReSharper disable once TooWideLocalVariableScope
double thePoint;
for (int i = 0; i < pointsCount; i++)
{
thePoint = startValue + (step * i);
if (thePoint > endValue)
{
thePoint = endValue;
}
list1.Add(thePoint, points[i]);
}
// Add the list to GraphPane
pane.AddCurve(expression, list1, Color.Blue, SymbolType.None);
// Finally make ZedGraphControl to re-draw itself
zgc.AxisChange();
zgc.Invalidate();
}
private static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
return;
// TODO Get expression from user
string expression = @"x^2-3";
int compileResult = LibraryBridge.CompileExpression(expression);
if (0 == compileResult)
{
//Console.WriteLine(LibraryBridge.F(4));
// TODO Get these values from user
double startValue = 1f,
endValue = 6.4f,
step = 0.5f;
int pointsCount = LibraryBridge.CalculatePointsCount(startValue, endValue, step);
double[] points = new double[pointsCount];
IntPtr pointsPtr = LibraryBridge.GetFunctionPoints(startValue, endValue, step);
Marshal.Copy(pointsPtr, points, 0, pointsCount);
foreach (double point in points)
{
Console.WriteLine(point);
}
LibraryBridge.FreeCompiledExpression();
}
else
{
Console.WriteLine(@"Error occured on col {0} while compiling expression.", compileResult);
}
//LibraryBridge.SomeFunction(@"Hello World!");
/*int arraySize = LibraryBridge.GetArraySize();
* double[] theArray = new double[arraySize];
*
* LibraryBridge.GetArray(theArray);
*
* Console.WriteLine(@"Array Size: {0}", arraySize);
*
* for (int i = 0; i < arraySize; i++) {
* Console.WriteLine(@"#{0} {1}", i, theArray[i]);
* }
*/
/*int arraySize = LibraryBridge.GetArraySize();
* StepOutput[] theArray = new StepOutput[arraySize];
*
* LibraryBridge.GetStepOutputs(theArray);
*
* Console.WriteLine(@"Array Size: {0}", arraySize);
*
* for (int i = 0; i < arraySize; i++) {
* Console.WriteLine(
* @"#{0}{1}{2}{1}{3}{1}{4}{1}",
* i,
* Environment.NewLine,
* theArray[i].a,
* theArray[i].b,
* theArray[i].root
* );
* }
*/
}