static void Koch(int X1, int Y1, int X2, int Y2, int X3, int Y3, int Step)
{
if (Step >= 0)
{
var x4 = (int)((X2 + 2 * X1) / 3);
var y4 = (int)((Y2 + 2 * Y1) / 3);
var x5 = (int)((2 * X2 + X1) / 3);
var y5 = (int)((Y1 + 2 * Y2) / 3);
var xs = (int)((X2 + X1) / 2);
var ys = (int)((Y2 + Y1) / 2);
var xn = (int)((4 * xs - X3) / 3);
var yn = (int)((4 * ys - Y3) / 3);
GraphicsWindow.DrawLine(x4, y4, xn, yn);
GraphicsWindow.DrawLine(x5, y5, xn, yn);
GraphicsWindow.DrawLine(x4, y4, x5, y5);
Koch(x4, y4, xn, yn, x5, y5, Step - 1);
Koch(xn, yn, x5, y5, x4, y4, Step - 1);
Koch(X1, Y1, x4, y4, (int)((2 * X1 + X3) / 3), (int)((2 * Y1 + Y3) / 3) + 1, Step - 1);
Koch(x5, y5, X2, Y2, (int)((2 * X2 + X3) / 3), (int)((2 * Y2 + Y3) / 3) + 1, Step - 1);
}
}
private static void GraphicsWindow_MouseDown()
{
int x1 = GraphicsWindow.Width / 2, y1 = 10;
int x2 = 400, y2 = GraphicsWindow.Height - 350;
int x3 = GraphicsWindow.Width - 400, y3 = GraphicsWindow.Height - 350;
GraphicsWindow.PenWidth = 2;
GraphicsWindow.DrawLine(x1, y1, x2, y2);
GraphicsWindow.DrawLine(x2, y2, x3, y3);
GraphicsWindow.DrawLine(x3, y3, x1, y1);
Koch(x1, y1, x2, y2, x3, y3, brok);
Koch(x2, y2, x3, y3, x1, y1, brok);
Koch(x3, y3, x1, y1, x2, y2, brok);
brok++;
}
static void DrawSquare(int Deep, double alp, params int[] P)
{
for (int i = 0; i < 8; i += 2)
{
GraphicsWindow.DrawLine(P[i % 8], P[(i + 1) % 8], P[(i + 2) % 8], P[(i + 3) % 8]);
}
if (Deep > 0)
{
int x1 = (int)(P[0] * (1 - alp) + P[2] * alp);
int x2 = (int)(P[2] * (1 - alp) + P[4] * alp);
int x3 = (int)(P[4] * (1 - alp) + P[6] * alp);
int x4 = (int)(P[6] * (1 - alp) + P[0] * alp);
int y1 = (int)(P[1] * (1 - alp) + P[3] * alp);
int y2 = (int)(P[3] * (1 - alp) + P[5] * alp);
int y3 = (int)(P[5] * (1 - alp) + P[7] * alp);
int y4 = (int)(P[7] * (1 - alp) + P[1] * alp);
DrawSquare(Deep - 1, alp, x1, y1, x2, y2, x3, y3, x4, y4);
}
}
// Analyseert de lijst en voert bijbehorende commando's uit.
private static void AnalyseAndPerformActions(List <string> commandList)
{
for (var i = 0; i < commandList.Count; i++)
{
switch (commandList[i])
{
case "fd":
case "forward":
Turtle.Move(GetNextNumber(i, commandList));
UpdatePositionVariables();
i += lengthOfNumericalInput;
break;
case "bk":
case "backward":
Turtle.Move(-GetNextNumber(i, commandList));
UpdatePositionVariables();
i += lengthOfNumericalInput;
break;
case "rt":
case "turn":
Turtle.Turn(GetNextNumber(i, commandList));
variables["angle"] = Turtle.Angle;
i += lengthOfNumericalInput;
break;
case "lt":
Turtle.Turn(-GetNextNumber(i, commandList));
variables["angle"] = Turtle.Angle;
i += lengthOfNumericalInput;
break;
case "wait":
System.Threading.Thread.Sleep((int)System.Math.Round(GetNextNumber(i, commandList) * 1000 / 60));
i += lengthOfNumericalInput;
break;
case "speed":
Turtle.Speed = GetNextNumber(i, commandList);
variables["speed"] = Turtle.Speed;
i += lengthOfNumericalInput;
break;
case "msg":
case "message":
case "print":
if (i + 1 < commandList.Count)
{
TextWindow.WriteLine(RemoveBrackets(commandList[i + 1]));
i++;
}
else
{
ThrowException(5);
}
break;
case "line":
SplitMultiNumberList(i, commandList, 4);
GraphicsWindow.DrawLine(multiNumberList[0], multiNumberList[1], multiNumberList[2], multiNumberList[3]);
i++;
break;
case "setpos":
SplitMultiNumberList(i, commandList, 2);
Turtle.X = multiNumberList[0];
Turtle.Y = multiNumberList[1];
UpdatePositionVariables();
i++;
break;
case "setpc":
SplitMultiNumberList(i, commandList, fromPenColor: true);
GraphicsWindow.PenColor = GraphicsWindow.GetColorFromRGB(
multiNumberList[0], multiNumberList[1], multiNumberList[2]);
i++;
break;
case "setbc":
SplitMultiNumberList(i, commandList);
GraphicsWindow.BackgroundColor = GraphicsWindow.GetColorFromRGB(
multiNumberList[0], multiNumberList[1], multiNumberList[2]);
i++;
break;
case "hide":
case "hideturtle":
case "ht":
Turtle.Hide();
turtleIsHidden = true;
break;
case "show":
case "showturtle":
case "st":
if (turtleIsHidden)
{
Turtle.Show();
}
turtleIsHidden = false;
break;
case "pu":
case "penup":
Turtle.PenUp();
break;
case "pd":
case "pendown":
Turtle.PenDown();
break;
case "file":
if (i + 1 < commandList.Count)
{
DrawFromFile(RemoveBrackets(commandList[i + 1]));
i++;
}
else
{
ThrowException(5);
}
break;
case "setorientation":
Turtle.Angle = GetNextNumber(i, commandList);
variables["angle"] = Turtle.Angle;
i += lengthOfNumericalInput;
break;
case "setpx":
case "setpixel":
SplitMultiNumberList(i, commandList, 2);
GraphicsWindow.SetPixel(multiNumberList[0], multiNumberList[1], GraphicsWindow.PenColor);
i++;
break;
case "repeat":
i += RepeatCommands(i, commandList);
break;
case "for":
ForLoop(i, commandList);
i += 2;
break;
case "while":
WhileLoop(i, commandList);
i += 2;
break;
case "circle":
int circleRadius = (int)GetNextNumber(i, commandList);
GraphicsWindow.DrawEllipse(Turtle.X - circleRadius, Turtle.Y - circleRadius, circleRadius * 2, circleRadius * 2);
i += lengthOfNumericalInput;
break;
case "cs":
ResetTurtle();
break;
case "ct":
TextWindow.Clear();
break;
case "help":
PrintHelp();
break;
case "if":
i += CompareInputs(i, commandList);
break;
case "make":
AddVariable(i, commandList);
i += lengthOfNumericalInput + 1;
break;
case "to":
i += ToCommandBase(i, commandList) + 2;
break;
default:
if (toShortcuts.ContainsKey(commandList[i]))
{
AnalyseAndPerformActions(toShortcuts[commandList[i]]);
}
else if (commandList[i].StartsWith(":"))
{
TextWindow.WriteLine(GetNextNumber(i, commandList, 0));
i += lengthOfNumericalInput - 1;
}
else
{
ThrowException(0, commandList[i]);
}
break;
}
}
}