// render graphic of selected function
private void Classic_Render(Pen pen_plotter, float x0, float x1, cPlotFunction PlotFunction)
{
double x_last = x0;
double y_last = PlotFunction.plotArray[0];
double dx = (x1 - x0) / (100 * 2);
double x = x_last;
foreach (double y in PlotFunction.plotArray)
{
// pass the first itteration, because we want get coords only for start point now
if (x != x_last)
{
hwnd.DrawLine(pen_plotter, (int)x_last, (int)y_last, (int)x, (int)y);
}
y_last = y;
x_last = x;
x += dx;
}
}
private void button1_Click(object sender, EventArgs e)
{
/*
* 1. Sin (x)
* 2. Cos (x)
* 3. Sin (x) + Sin (2x)
* 4. Sin (x) - Sin (2x)
* 5. Sin (x) + Cos (2x)
* 6. Sin (x) - Cos (2x)
* 7. Sin (x) * Exp (x)
* 8. Cos (x) * Exp (x)
* 9. Sin (x) * Exp (-x)
* 10. Cos (x) * Exp (-x)
*/
// init class cPlotFunction
cPlotFunction PlotFunction = new cPlotFunction();
// Clean window
hwnd.Clear(this.BackColor);
// Select a color of pen
Pen pen_border = Pens.Black;
Pen pen_axis = Pens.Gray;
Pen pen_plotter = Pens.DarkBlue;
// Caption
string s = comboBox1.SelectedItem.ToString();
int uptab = 25;
int downtab = 40;
int lefttab = 10;
int righttab = 10;
float amplitude = (this.Height - uptab - downtab) / 2;
float x0 = lefttab;
float y0 = uptab;//this.Height / 2;
float x1 = this.Width - righttab;
float y1 = this.Height - downtab;
float y_center = (this.Height - uptab - downtab) / 2 + uptab;
// Draw info
hwnd.DrawString(s,
new Font("Arial", 14),
Brushes.Red,
x0,
y1 + 5);
// plot axis
// hwnd.DrawLine(pen, x0, y0, x1, y0);
//hwnd.DrawLine(pen, x0, y0 - amplitude, x0, y0 + amplitude);
// Draw Borders
hwnd.DrawLine(pen_border, x0, y0, x0, y1);
hwnd.DrawLine(pen_border, x0, y1, x1, y1);
hwnd.DrawLine(pen_border, x1, y1, x1, y0);
hwnd.DrawLine(pen_border, x1, y0, x0, y0);
// Draw Axis
hwnd.DrawLine(pen_axis, x0, y_center, x1, y_center);
hwnd.DrawLine(pen_axis, x0, y0, x0, y1);
cPlotFunction.sWindow my_window; // var for struct that is contain coordinates of drawing field
my_window.left = lefttab;
my_window.top = uptab;
my_window.width = this.Width - lefttab - righttab;
my_window.height = this.Height - uptab - downtab;
// Draw selected function in ComboBox
PlotFunction.Draw(my_window, comboBox1.SelectedItem.ToString());
// render graphic in old way. You can uncomment and see that is the same
//Classic_Render(x0, x1, PlotFunction);
// render graphic to new way
hwnd.DrawLines(pen_plotter, PlotFunction.plotArraySDP);
}
