public Point EndPoint(ScreenConverter s)
{
Point p = new Point();
p.X = (int)(s.II(Center.X) + R * Math.Cos((SweepAngle + StartAngle) * Math.PI / 180));
p.Y = (int)(s.JJ(Center.Y) + R * Math.Sin((SweepAngle + StartAngle) * Math.PI / 180));
return(p);
}
public Point StartPoint(ScreenConverter s)
{
Point p = new Point();
p.X = (int)(s.II(Center.X) + R * Math.Cos(StartAngle * Math.PI / 180));
p.Y = (int)(s.JJ(Center.Y) + R * Math.Sin(StartAngle * Math.PI / 180));;
return(p);
}
public MainForm()
{
InitializeComponent();
converter = new ScreenConverter(ClientRectangle);
_Axes = new Axes(converter);
_Segment = new Segment(100, 100, 50,
0, 90);
Invalidate();
}
public bool IsInside(Point pt, ScreenConverter conv)
{
int ptLength = Math.Abs((int)Math.Sqrt(Math.Pow(pt.X - conv.II(Center.X), 2) + Math.Pow(pt.Y - conv.JJ(Center.Y), 2)));
if (ptLength >= 0 && ptLength <= R)
{
return(true);
}
return(false);
}
public bool IsStart(Point pt, ScreenConverter conv)
{
int ptLength = Math.Abs((int)Math.Sqrt(Math.Pow(pt.X - StartPoint(conv).X, 2)
+ Math.Pow(pt.Y - StartPoint(conv).Y, 2)));
if (ptLength >= 0 && ptLength <= R / 5)
{
return(true);
}
return(false);
}
public bool IsEnd(Point pt, ScreenConverter conv)
{
int ptLength = (int)Math.Sqrt(Math.Pow(pt.X - EndPoint(conv).X, 2)
+ Math.Pow(pt.Y - EndPoint(conv).Y, 2));
if (ptLength >= 0 && ptLength <= R / 5)
{
return(true);
}
return(false);
}
public void CalculateAngle(Point pt, ScreenConverter conv, bool start)
{
double x;
double y;
x = pt.X - conv.II(Center.X);
y = pt.Y - conv.JJ(Center.Y);
float alpha = (float)(Math.Atan2(y, x) * 180 / Math.PI);
if (start)
{
StartAngle = alpha;
}
else
{
if (alpha < 0)
{
if (StartAngle > 90 && StartAngle < 180)
{
SweepAngle = 360 - StartAngle - Math.Abs(alpha);
}
else
{
SweepAngle = 360 - StartAngle - Math.Abs(alpha);
if (SweepAngle > 360)
{
SweepAngle = SweepAngle % 360;
}
}
}
else
{
if (StartAngle > 90 && StartAngle < 180)
{
SweepAngle = 360 + alpha - StartAngle;
SweepAngle = SweepAngle % 360;
}
else
{
if (StartAngle < 0)
{
SweepAngle = -StartAngle + alpha;
}
else
{
SweepAngle = alpha;
}
}
}
}
}
public static Bitmap Draw(Bitmap bmp, Segment s, ScreenConverter conv)
{
Graphics g = Graphics.FromImage(bmp);
g.DrawArc(Pens.Black, conv.II(s.Center.X) - s.R, conv.JJ(s.Center.Y) - s.R,
s.R * 2, s.R * 2, s.StartAngle, s.SweepAngle);
g.DrawEllipse(Pens.Black, s.StartPoint(conv).X - s.R / 10, s.StartPoint(conv).Y - s.R / 10, s.R / 5, s.R / 5);
g.DrawEllipse(Pens.Black, s.EndPoint(conv).X - s.R / 10, s.EndPoint(conv).Y - s.R / 10, s.R / 5, s.R / 5);
if (!(s.StartAngle == 0 && s.SweepAngle == 360))
{
g.DrawLine(Pens.Black, s.StartPoint(conv), s.EndPoint(conv));
}
g.Dispose();
return(bmp);
}
public void CalculateRadius(Point pt, ScreenConverter conv)
{
R = (float)Math.Sqrt(Math.Pow(pt.X - conv.II(Center.X), 2) + Math.Pow(pt.Y - conv.JJ(Center.Y), 2));
}
public Axes(ScreenConverter c)
{
conv = c;
aFont = new Font("Arial", 7, FontStyle.Bold);
}