public void DrawEllipse(int x, int y, int radiusX, int radiusY, Color color, int thickness = 1)
{
if (radiusX <= -1)
{
radiusX *= -1;
}
if (radiusY <= -1)
{
radiusY *= -1;
}
int x1 = x - radiusX;
int y1 = y - radiusY;
int x2 = x + radiusX;
int y2 = y + radiusY;
if (!IsObjectOnScreen(x1, y1, x2 - x1, y2 - y1))
{
return;
}
EllipseKey key = new EllipseKey(radiusX, radiusY, color, thickness);
Rectangle screen = _parent.GetScreen();
double zoom = _parent.GetZoom();
TextureExt tx_ellipse = GetEllipse(key);
DrawTexture(tx_ellipse, new Rectangle(0, 0, x2 - x1, y2 - y1), new Vector3(0, 0, 0), new Vector3(x1 - (int)(screen.X / zoom), y1 - (int)(screen.Y / zoom), 0), color);
}
public TextureExt GetEllipse(EllipseKey key)
{
if (tx_ellipses.ContainsKey(key))
{
return(tx_ellipses[key]);
}
else
{
int size = 0;
if (key.radiusX * 2 > key.radiusY * 2)
{
size = key.radiusX * 2;
}
else
{
size = key.radiusY * 2;
}
size += key.thickness;
size += 1;
Bitmap txb_ellipse = GetTextureReadyBitmap(new Bitmap(size, size));
using (Graphics g = Graphics.FromImage(txb_ellipse))
{
g.Clear(Color.Transparent);
Pen pen = new Pen(key.color);
pen.Width = key.thickness;
int x = 0;
int y = 0;
int width = key.radiusX * 2;
int height = key.radiusY * 2;
g.DrawEllipse(pen, new System.Drawing.RectangleF(x, y, width, height));
}
TextureExt tx_ellipse = Methods.Drawing.TextureCreator.FromBitmap(_device, txb_ellipse);
tx_ellipses.Add(key, tx_ellipse);
txb_ellipse.Dispose();
return(tx_ellipses[key]);
}
}