//Event for resetting the program.
private void ResetButton_Click(object sender, EventArgs e)
{
LSystemString = axiom;
LSystemDrawingCanvas.ResetTransform();
LSystemDrawingCanvas.TranslateTransform(200, 400);
LSystemDrawingCanvas.Clear(LSystemPictureBox.BackColor);
LSystemPictureBox.Refresh();
InstructionsTextbox.Text = "";
length = 75.0f;
}
//The turtle which executes the instructions encoded in the LSystemString created by GenerateLSystem.
private void Turtle(string LSystemString)
{
//Stack which holds all the saved Information.
List <GraphicsState> transformationStateStack = new List <GraphicsState>();
//Loop for checking the whole string, letter by letter and execute the instructions associated with it.
for (int i = 0; i < LSystemString.Length; i++)
{
string CurrentSymbol = LSystemString.Substring(i, 1);
if (CurrentSymbol == "F")
{
LSystemDrawingCanvas.DrawLine(WhitePen, 0, 0, 0, -length);
LSystemDrawingCanvas.TranslateTransform(0, -length);
}
else if (CurrentSymbol == "+")
{
LSystemDrawingCanvas.RotateTransform(30);
}
else if (CurrentSymbol == "-")
{
LSystemDrawingCanvas.RotateTransform(-30);
}
else if (CurrentSymbol == "[")
{
Push(LSystemDrawingCanvas.Save(), transformationStateStack);
}
else if (CurrentSymbol == "]")
{
LSystemDrawingCanvas.Restore(Pop(transformationStateStack));
}
}
//After all instructions have been executed refresh the PictureBox to start the paint event.
LSystemPictureBox.Refresh();
}