private void C1()
{
G1();
Point2D p0 = BSplineControlPoints[BSplineControlPoints.Count - 2];
Point2D p1 = BezierControlPoints.First();
Point2D p2 = BezierControlPoints[1];
BezierCurve.Scale(
new PointF(
(p1.Location.X - p0.Location.X) / (p2.Location.X - p1.Location.X),
(p1.Location.Y - p0.Location.Y) / (p2.Location.Y - p1.Location.Y)
),
p1.Location
);
float scale = BSplineCurve.Degree / (
BSplineCurve.Knots[BSplineCurve.ControlPointsNum - 1 + BSplineCurve.Degree] -
BSplineCurve.Knots[BSplineCurve.ControlPointsNum - 1]
);
scale /= BezierCurve.Degree;
BezierCurve.Scale(new PointF(scale, scale), p1.Location);
}
private void C0()
{
float deltaX = BSplineControlPoints.Last().Location.X - BezierControlPoints.First().Location.X;
float deltaY = BSplineControlPoints.Last().Location.Y - BezierControlPoints.First().Location.Y;
foreach (Point2D p in BezierControlPoints)
{
p.Location.X += deltaX;
p.Location.Y += deltaY;
}
}
private void G1()
{
C0();
Point2D p0 = BSplineControlPoints[BSplineControlPoints.Count - 2];
Point2D p1 = BezierControlPoints.First();
Point2D p2 = BezierControlPoints[1];
float angle = 0;
if (p1.Location.X - p0.Location.X <= 0 && p1.Location.Y - p0.Location.Y <= 0)
{
angle = (float)PI;
}
else if (p1.Location.X - p0.Location.X >= 0 && p1.Location.Y - p0.Location.Y <= 0)
{
angle = (float)(PI / 2);
}
else if (p1.Location.X - p0.Location.X <= 0 && p1.Location.Y - p0.Location.Y >= 0)
{
angle = (float)(-PI / 2);
}
BSplineCurve.Rotate(angle, p1.Location);
if (p2.Location.X - p1.Location.X <= 0 && p2.Location.Y - p1.Location.Y <= 0)
{
BezierCurve.Rotate((float)PI, p1.Location);
}
else if (p2.Location.X - p1.Location.X >= 0 && p2.Location.Y - p1.Location.Y <= 0)
{
BezierCurve.Rotate((float)(PI / 2), p1.Location);
}
else if (p2.Location.X - p1.Location.X <= 0 && p2.Location.Y - p1.Location.Y >= 0)
{
BezierCurve.Rotate((float)(-PI / 2), p1.Location);
}
BezierCurve.Rotate(
(float)(Atan(Abs(p2.Location.X - p1.Location.X) / Abs(p2.Location.Y - p1.Location.Y)) -
Atan(Abs(p1.Location.X - p0.Location.X) / Abs(p1.Location.Y - p0.Location.Y))),
p1.Location);
BezierCurve.Rotate(-angle, p1.Location);
BSplineCurve.Rotate(-angle, p1.Location);
}
public Window()
{
InitializeComponent();
string[] fileLines = File.ReadAllLines(@"points");
for (int i = 5; i < fileLines.Length; i++)
{
string[] coordinates = fileLines[i].Split(';');
BSplineControlPoints.Add(
new Point2D(ParseFloat(coordinates[0]), ParseFloat(coordinates[1]), Color.Coral, panel1)
);
}
BSplineCurve = new BSpline(BSplineControlPoints[0],
BSplineControlPoints[1],
BSplineControlPoints[2],
BSplineControlPoints[3],
BSplineControlPoints[4],
BSplineControlPoints[5],
Color.OrangeRed);
for (int i = 0; i < 5; i++)
{
string[] coordinates = fileLines[i].Split(';');
BezierControlPoints.Add(
new Point2D(ParseFloat(coordinates[0]), ParseFloat(coordinates[1]), Color.BlueViolet, panel1)
);
}
BezierCurve = new Bezier(BezierControlPoints[0],
BezierControlPoints[1],
BezierControlPoints[2],
BezierControlPoints[3],
BezierControlPoints[4],
Color.Blue);
panel1.Paint += new PaintEventHandler(panel1_Paint);
button1.Click += (s, e) => { C0(); panel1.Invalidate(); };
button2.Click += (s, e) => { G1(); panel1.Invalidate(); };
button3.Click += (s, e) => { C1(); panel1.Invalidate(); };
button4.Click += (s, e) => { G2(); panel1.Invalidate(); };
button5.Click += (s, e) => { C2(); panel1.Invalidate(); };
chBox.Click += (s, e) =>
{
ShowControlPoints = !ShowControlPoints;
foreach (Point2D p in BSplineControlPoints)
{
p.Active = !p.Active;
}
foreach (Point2D p in BezierControlPoints)
{
p.Active = !p.Active;
}
panel1.Invalidate();
};
panel1.MouseWheel += MouseWheelEvent;
panel1.MouseDown += (s, e) =>
{
if (panel1.Dragging)
{
return;
}
DraggingPanel = true;
MouseLocation = e.Location;
};
panel1.MouseMove += (s, e) =>
{
if (!DraggingPanel)
{
return;
}
PointF newMousePos = e.Location;
foreach (Point2D p in BSplineControlPoints)
{
p.Location.X += newMousePos.X - MouseLocation.X;
p.Location.Y += newMousePos.Y - MouseLocation.Y;
}
foreach (Point2D p in BezierControlPoints)
{
p.Location.X += newMousePos.X - MouseLocation.X;
p.Location.Y += newMousePos.Y - MouseLocation.Y;
}
MouseLocation = newMousePos;
panel1.Invalidate();
};
panel1.MouseUp += (s, e) => { DraggingPanel = false; };
}
