/// <summary>
/// Constructor
/// </summary>
/// <param name="turtle">Turtle instance</param>
/// <param name="pen">Drawing pen (optional)</param>
public State(Turtle turtle, Pen pen = null)
{
Turtle = turtle;
if (pen != null)
Pen = pen;
else
Pen = new Pen(Color.Black);
}
/// <summary>
/// Generate L-System polylines
/// </summary>
/// <returns>List of generated polylines</returns>
public List<IDrawable> Generate()
{
List<IDrawable> polylines = new List<IDrawable>();
Turtle turtle = new Turtle(_startPoint, _startAngle, _step, _delta, _angleDelta, _stepDelta);
turtle.Randomizer = _random;
Polyline polyline = new Polyline();
polyline.Pen = (Pen) _pen.Clone();
polyline.Add(turtle.Position);
for (int i = 0; i < _expandedGrammar.Length; i++)
{
switch (_expandedGrammar[i])
{
case 'A': // draw forward
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'H':
case 'I':
case 'J':
turtle.Forward();
polyline.Add(turtle.Position);
break;
case 'K': // draw backward
case 'L':
case 'M':
case 'N':
turtle.Backward();
polyline.Add(turtle.Position);
break;
case 'a': // move forward without drawing
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
if(polyline.Points.Count > 1) // save polyline only if there is an actual line
polylines.Add(polyline);
polyline = new Polyline(); // start new polyline
polyline.Pen = (Pen) _pen.Clone();
turtle.Forward();
polyline.Add(turtle.Position);
break;
case '+': // turn left
turtle.Left();
break;
case '-': // turn right
turtle.Right();
break;
case '|': // turn around
turtle.TurnAround();
break;
case '[': // save state to stack
_stateStack.Push(new State((Turtle)turtle.Clone()));
break;
case ']': // load state from stack
State state = _stateStack.Pop();
turtle = state.Turtle;
if (polyline.Points.Count > 1)
polylines.Add(polyline);
polyline = new Polyline();
polyline.Pen = (Pen) _pen.Clone();
polyline.Add(turtle.Position);
break;
default:
break;
}
}
// add last polyline to polylines list (only when it's not empty)
if(polyline.Points.Count > 1)
polylines.Add(polyline);
return polylines;
}
/// <summary>
/// Clone turtle object
/// </summary>
/// <returns>Clone of turtle object</returns>
public object Clone()
{
Turtle clone = new Turtle(_position, _angle, _step, _delta, _angleDelta, _stepDelta);
clone.Randomizer = Randomizer;
return clone;
}
/// <summary>
/// Generate L-System polylines
/// </summary>
/// <returns>List of generated polylines</returns>
public List <IDrawable> Generate()
{
List <IDrawable> polylines = new List <IDrawable>();
Turtle turtle = new Turtle(_startPoint, _startAngle, _step, _delta, _angleDelta, _stepDelta);
turtle.Randomizer = _random;
Polyline polyline = new Polyline();
polyline.Pen = (Pen)_pen.Clone();
polyline.Add(turtle.Position);
for (int i = 0; i < _expandedGrammar.Length; i++)
{
switch (_expandedGrammar[i])
{
case 'A': // draw forward
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'H':
case 'I':
case 'J':
turtle.Forward();
polyline.Add(turtle.Position);
break;
case 'K': // draw backward
case 'L':
case 'M':
case 'N':
turtle.Backward();
polyline.Add(turtle.Position);
break;
case 'a': // move forward without drawing
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
if (polyline.Points.Count > 1) // save polyline only if there is an actual line
{
polylines.Add(polyline);
}
polyline = new Polyline(); // start new polyline
polyline.Pen = (Pen)_pen.Clone();
turtle.Forward();
polyline.Add(turtle.Position);
break;
case '+': // turn left
turtle.Left();
break;
case '-': // turn right
turtle.Right();
break;
case '|': // turn around
turtle.TurnAround();
break;
case '[': // save state to stack
_stateStack.Push(new State((Turtle)turtle.Clone()));
break;
case ']': // load state from stack
State state = _stateStack.Pop();
turtle = state.Turtle;
if (polyline.Points.Count > 1)
{
polylines.Add(polyline);
}
polyline = new Polyline();
polyline.Pen = (Pen)_pen.Clone();
polyline.Add(turtle.Position);
break;
default:
break;
}
}
// add last polyline to polylines list (only when it's not empty)
if (polyline.Points.Count > 1)
{
polylines.Add(polyline);
}
return(polylines);
}
