public void DrawCircle(IflPoint c, double r, bool fill = false)
{
Graphics g = this;
Point scrCenter = viewportToScreen(c);
flPoint scrRadii = scaleToScreen(new flPoint(r, r));
System.Drawing.Rectangle boundingRec = new System.Drawing.Rectangle(
(int)Math.Round(scrCenter.X - scrRadii.X), (int)Math.Round(scrCenter.Y - scrRadii.Y),
(int)Math.Round(2 * scrRadii.X), (int)Math.Round(2 * scrRadii.Y));
g.DrawEllipse(CurrentPen as Pen, boundingRec);
if (fill)
{
g.FillEllipse(CurrentBrush as Brush, boundingRec);
}
// flPoint[] circle = new flPoint[circularTessellation];
// flPoint[] quarterCircle = new flPoint[circularTessellation/4];
// double deltaAngle = (2 * Math.PI) / circularTessellation;
// // first half quadrent
// for (int idx = 0; idx < circularTessellation / 8; idx++)
// {
// double angle = (deltaAngle * idx) + (deltaAngle/2);
// double x = Math.Sin(angle) * r;
// double y = Math.Cos(angle) * r;
// quarterCircle[idx] = new flPoint(x, y);
// circle[idx] = quarterCircle[idx].Translate(c);
// }
// //DrawPolygon(g, circle);
// // second half quadrent
// for (int idx = 0; idx < circularTessellation / 8; idx++)
// {
// quarterCircle[idx + circularTessellation / 8] =
// new flPoint(quarterCircle[(circularTessellation / 8) - idx - 1].Y,
// quarterCircle[(circularTessellation / 8) - idx - 1].X);
// circle[idx + circularTessellation / 8] = quarterCircle[idx + circularTessellation / 8].Translate(c);
// }
// //DrawPolygon(g, circle);
// // second quadrant
// for (int idx = 0; idx < circularTessellation / 4; idx++)
// {
// circle[idx + circularTessellation / 4] = quarterCircle[circularTessellation / 4 - idx - 1].Scale(1, -1).Translate(c);
// }
// //DrawPolygon(g, circle);
// // third quadrent
// for (int idx = 0; idx < circularTessellation / 4; idx++)
// {
// circle[idx + circularTessellation / 2] = quarterCircle[idx].Scale(-1, -1).Translate(c);
// }
// //DrawPolygon(g, circle);
//// fourth quadrent
// for (int idx = 0; idx < circularTessellation / 4; idx++)
// {
// circle[idx + ((circularTessellation * 3) / 4)] = quarterCircle[circularTessellation / 4 - idx - 1].Scale(-1, 1).Translate(c);
// }
// DrawPolygon(g, circle);
}
private flPoint scaleToScreen(Size s)
{
//return p;
flPoint value = new flPoint();
value.X = (szScreen.X * s.Width) / szViewport.X;
value.Y = ((szScreen.Y * s.Height) / szViewport.Y);
return(value);
}
private flPoint scaleToScreen(flPoint p)
{
//return p;
flPoint value = new flPoint();
value.X = (int)Math.Round((szScreen.X * p.X) / szViewport.X);
value.Y = (int)Math.Round((szScreen.Y * p.Y) / szViewport.Y);
return(value);
}
public void DrawPoint(IflPoint p)
{
Graphics g = this;
Point scrCenter = viewportToScreen(p);
flPoint scrRadii = scaleToScreen(new flPoint(.5, .5));
System.Drawing.Rectangle boundingRec = new System.Drawing.Rectangle(
(int)Math.Round(scrCenter.X - scrRadii.X), (int)Math.Round(scrCenter.Y - scrRadii.Y),
(int)Math.Round(2 * scrRadii.X), (int)Math.Round(2 * scrRadii.Y));
//g.DrawEllipse(CurrentPen as Pen, boundingRec);
g.FillEllipse(CurrentBrush as Brush, boundingRec);
}
public Canvas()
{
InitializeComponent();
//this.Paint += new PaintEventHandler(Canvas_Paint);
szViewport = new flPoint(110, 110);
szScreen = new flPoint(-1, -1);
ptViewport = new flPoint(55, 55);
CurrentPen = Pens.Black;
CurrentBrush = Brushes.LightGray;
}
private void Canvas_SizeChanged(object sender, EventArgs e)
{
Size sz = this.Size;
// force a square aspect ratio for now
if (sz.Height > sz.Width)
{
sz.Height = sz.Width;
}
else
{
sz.Width = sz.Height;
}
szScreen = new flPoint(sz);
Invalidate();
}
public void Canvas_Paint(Object sender, PaintEventArgs e)
{
try
{
_graphics = e.Graphics;
if (szScreen.X <= 0 || szScreen.Y <= 0)
{
Size sz = this.Size;
// force a square aspect ratio for now
if (sz.Height > sz.Width)
{
sz.Height = sz.Width;
}
else
{
sz.Width = sz.Height;
}
szScreen = new flPoint(sz);
}
DrawGrid(e.Graphics);
foreach (IDrawingObject o in ObjectList.Values)
{
o.Draw(this);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "OOPS!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
// _graphics = null;
}
}
public Line(Point p1, Point p2)
{
P1 = new flPoint(p1); P2 = new flPoint(p2);
}
public Circle(flPoint center, double radius, bool fill = false)
{
Center = center;
Radius = radius;
Fill = fill;
}
