private Point Bezier3(Point p0, Point p1, Point p2, Point p3, double t, double z)
{
List <Point> mt = new List <Point> {
p0, p1, p2, p3
};
List <Point> res = new List <Point>();
Point r = new Point();
for (int i = 0; i < matrix.Count; i++)
{
double x = 0;
double y = 0;
for (int j = 0; j < matrix[i].Count; j++)
{
x += mt[j].X * matrix[j][i];
y += mt[j].Y * matrix[j][i];
}
res.Add(new Point {
X = x, Y = y, Z = z
});
}
for (int i = 0; i < res.Count; i++)
{
r.X += res[i].X * Math.Pow(t, i);
r.Y += res[i].Y * Math.Pow(t, i);
}
return(r);
}
public SunControl(Control parent)
{
sunXY = new PictureBox();
var sunZ = new TrackBar
{
Orientation = Orientation.Vertical, Minimum = -100, Maximum = 100, Value = 0,
};
parent.Controls.Add(sunXY);
parent.Controls.Add(sunZ);
parent.Resize += (sender, args) =>
{
var width = Math.Min(parent.ClientSize.Width, parent.ClientSize.Height) - parent.Margin.Vertical - sunZ.Width - 8;
if (parent.Width <= 0)
{
return;
}
sunXY.Size = new Size(width, width);
sunZ.Height = width;
Redraw();
};
sunXY.MouseMove += (sender, args) =>
{
if ((args.Button & MouseButtons.Left) == 0)
{
return;
}
var delta = new Point {
X = args.X - sunXY.Width / 2, Y = args.Y - sunXY.Height / 2
};
var r = (float)delta.Length();
Y = -(float)delta.X / r;
X = -(float)delta.Y / r;
Redraw();
NewPosition?.Invoke(new Point {
X = X * xy, Y = Y * xy, Z = Z
});
};
sunZ.ValueChanged += (sender, args) =>
{
Z = sunZ.Value / 100F;
Redraw();
NewPosition?.Invoke(new Point {
X = X * xy, Y = Y * xy, Z = Z
});
};
}
void GenerateBezier()
{
List <Spline> spline = new List <Spline>();
foreach (var select in context.world.selected)
{
Spline s = select as Spline;
if (s != null && s.points.Count > 3)
{
var copypoints = new LinkedList <Point>();
int count = (s.points.Count + 1) / 2 - 1;
bool flag = s.points.Count % 2 != 0;
foreach (var point in s.points)
{
copypoints.AddLast(point);
}
LinkedListNode <Point> p0 = copypoints.First;
spline.Add(new Spline());
while (count != 0)
{
LinkedListNode <Point> p1, p2, p3;
p1 = p0.Next;
p2 = p1.Next;
if (flag && count == 1)
{
p3 = p2;
}
else if (!flag && count == 1)
{
p2 = p2.Next;
p3 = p2;
}
else if (!flag && count == 1)
{
p2 = p1;
p3 = p2.Next;
count++;
flag = true;
}
else
{
p3 = p2.Next;
}
var p = new Point
{
X = (p2.Value.X + p3.Value.X) / 2, Y = (p2.Value.Y + p3.Value.Y) / 2,
Z = (p2.Value.Z + p3.Value.Z) / 2
}; //p'
Point q0 = p0.Value;
for (float t = (float)0.12; t <= 1.0; t += (float)0.02)
{
var q1 = Bezier3(p0.Value, p1.Value, p2.Value, p, t, p.Z);
spline.Last().Add(q0);
q0 = q1;
}
spline.Last().Add(q0);
p0 = copypoints.AddAfter(p2, p); //p'
count--;
}
}
}
context.world.selected.Clear();
foreach (var s in spline)
{
context.world.entities.Add(s);
context.world.selected.Add(s);
}
context.Redraw();
}