public static void DrawPoints(PaintEventArgs e, Bezier b, Brush p, Brush c, int size = 4)
{
int n = b.points.Count - 1;
for (int i = 1; i < n; ++i)
e.Graphics.FillEllipse(p, ComplexToRect(b.points[i], size));
e.Graphics.FillEllipse(c, ComplexToRect(b.points[0], size + 1));
e.Graphics.FillEllipse(c, ComplexToRect(b.points[n], size + 1));
}
public static void DrawBezier(PaintEventArgs e, Bezier b, float stepSize = 0.005f)
{
PointF prev = b.castelijou(0.0).ToPointF();
PointF curr;
Pen p = new Pen(Brushes.Black, 5);
for (double t = stepSize; t <= 1.0f; t += stepSize)
{
curr = b.castelijou(t).ToPointF();
e.Graphics.DrawLine(p, prev, curr);
prev = curr;
}
e.Graphics.DrawLine(p, prev, b.castelijou(1.0).ToPointF());
}
public static void DrawConvexHull(PaintEventArgs e, Bezier b, Pen p)
{
List<Complex> hull = GrahamHull.GetGrahamHull(b.points);
if (hull.Count < 2)
return; // no need to draw..
PointF prev = hull[0].ToPointF();
PointF curr;
foreach (var ch in hull)
{
curr = ch.ToPointF();
e.Graphics.DrawLine(p, prev, curr);
prev = curr;
}
e.Graphics.DrawLine(p, prev, hull[0].ToPointF());
}
public static void DrawConnections(PaintEventArgs e, Bezier b, Pen p)
{
var pt = b.points.Select(x => {return x.ToPointF(); } ).ToArray();
e.Graphics.DrawLines(p, pt);
}
private void drawingPanel_Click(object sender, EventArgs e)
{
MouseEventArgs mos = e as MouseEventArgs;
switch (mode)
{
case Mode.ConstructCurve:
case Mode.PathCreate:
if (mos.Button == MouseButtons.Left)
{
construct.Add(mos.Location);
(sender as Panel).Invalidate();
construct.exit = false;
}
else if (mos.Button == MouseButtons.Right)
{
if (mode == Mode.PathCreate)
{
if (construct.exit)
{
WorkingMode = Mode.Normal;
Cursor = Cursors.Default;
}
else if (construct.CanBeDrawed() && construct.currentSet == null) // first curve
{
Complex last = new Complex(construct.bezier.points[construct.bezier.points.Count - 1]);
construct.currentSet = new BezierSet(construct.bezier);
beziers.Add(construct.currentSet);
construct.bezier = new Bezier();
construct.pt = new List<Complex>();
construct.Add(new Point((int)last.Re, (int)last.Im));
}
else if (construct != null && construct.currentSet != null && construct.bezier != null)
{
var last = construct.currentSet.set.Last();
construct.currentSet.set.Add(construct.bezier);
last.ConnectRight(construct.bezier, false); // polacz z pierwszym
Complex l = construct.bezier.points[construct.bezier.Degree - 1];
construct.pt = new List<Complex>();
construct.Add(new Point((int)l.Re, (int)l.Im));
}
construct.exit = true;
}
else
{
if (construct != null && construct.bezier != null && construct.bezier.points.Count > 1)
{
beziers.Add(new BezierSet(construct.bezier));
}
WorkingMode = Mode.Normal;
Cursor = Cursors.Default;
}
(sender as Panel).Invalidate();
}
break;
case Mode.AddingNewCurve:
if (mos.Button == MouseButtons.Left)
{
addnew.Add(mos.Location);
(sender as Panel).Invalidate();
if (addnew.Ready())
{
Cursor = Cursors.Arrow;
FormAddCurve ask = new FormAddCurve();
ask.ShowDialog(this);
// construct curve with enough control points
Bezier b = new Bezier(addnew.pt, ask.Degree - 2);
beziers.Add(new BezierSet(b));
// exit adding curve
WorkingMode = Mode.Normal;
drawingPanel.Invalidate();
}
}
break;
case Mode.Merging:
if (mos.Button == MouseButtons.Right)
WorkingMode = Mode.Normal;
else if (mos.Button == MouseButtons.Left)
{
var p = FindNearestPoint(mos);
if (p != null)
{
if (normalMode.ptr.i == 0) // jesli zaznaczony byl po lewej
{
if (normalMode.ptr.bez.ConnectLeft(p.bez, p.i != 0)) // to dopnij z prawej strony z odpowiednim koncem
{
if (p.bset != normalMode.ptr.bset)
{
normalMode.ptr.bset.Add(p.bset);
beziers.Remove(p.bset);
}
drawingPanel.Invalidate();
WorkingMode = Mode.Normal;
}
}
else if (normalMode.ptr.i == normalMode.ptr.bez.Degree - 1)
{
if (normalMode.ptr.bez.ConnectRight(p.bez, p.i != 0))
{
if (p.bset != normalMode.ptr.bset)
{
normalMode.ptr.bset.Add(p.bset);
beziers.Remove(p.bset);
}
drawingPanel.Invalidate();
WorkingMode = Mode.Normal;
}
}
}
}
break;
}
}
public Bezier(Bezier b)
{
Id = IdCounter++;
points = new List<Complex>(b.points.ToArray());
}
public void Add(Point p)
{
pt.Add(new Complex(p.X, p.Y));
if (pt.Count > 1)
bezier = new Bezier(pt.ToArray());
}
public bool ConnectRight(Bezier s, bool last = true, bool force = false)
{
if (s == null || (right != null && force == false))
return false;
int nr = last ? s.Degree - 1 : 0;
if (last) // tutejszy prawy z tamtym ostatnim [prawym]
{
if (s.right != null && force == false)
return false;
right = s;
rightNode = nr;
s.right = this;
s.rightNode = Degree - 1;
}
else // prawy z lewym
{
if (s.right != null && force == false)
return false;
right = s;
rightNode = nr;
s.left = this;
s.leftNode = Degree - 1;
}
return true;
}
public bool ConnectLeft(Bezier s, bool last = false, bool force = false)
{
if (s == null || (left != null && force == false))
return false;
int nr = last ? s.Degree - 1 : 0;
if (last) // tutejszy lewy z tamtym ostatnim [prawym]
{
if (s.right != null && force == false)
return false;
left = s;
leftNode = nr;
s.right = this;
s.rightNode = 0;
//Chaining(0);
//Chaining(1);
//Chaining(Degree - 1);
//Chaining(Degree - 2);
}
else // lewy z lewym
{
if (s.left != null && force == false)
return false;
left = s;
leftNode = nr;
s.left = this;
s.leftNode = 0;
//Chaining(0);
//Chaining(1);
}
return true;
}
public CurrentPtr(Bezier b, BezierSet s, int index)
{
bez = b;
bset = s;
i = index;
}
public void Add(Bezier b)
{
set.Add(b);
}
public BezierSet(Bezier b)
{
set = new List<Bezier>();
set.Add(b);
}