Vector2 closestPointToRectangle(Vector2 p, Rectangle r)
{
Vector2 rectPos = new Vector2(r.Left, r.Top);
// relative position of p from the point 'p'
Vector2 d = p - rectPos;
// rectangle half-size
Vector2 h = new Maths.Vector2((float)r.Width / 2f, (float)r.Height / 2f);
// special case when the sphere centre is inside the rectangle
if (Math.Abs(d.X) < h.X && Math.Abs(d.Y) < h.Y)
{
// use left or right side of the rectangle boundary
// as it is the closest
if ((h.X - Math.Abs(d.X)) < (h.Y - Math.Abs(d.Y)))
{
d.Y = 0.0f;
d.X = h.X * Math.Sign(d.X);
}
// use top or bottom side of the rectangle boundary
// as it is the closest
else
{
d.X = 0.0f;
d.Y = h.Y * Math.Sign(d.Y);
}
}
else
{
// clamp to rectangle boundary
if (Math.Abs(d.X) > h.X)
{
d.X = h.X * Math.Sign(d.X);
}
if (Math.Abs(d.Y) > h.Y)
{
d.Y = h.Y * Math.Sign(d.Y);
}
}
// the closest point on rectangle from p
Vector2 c = rectPos + d;
return(c);
}
/// <summary>
///
/// </summary>
/// <param name="pX"></param>
/// <param name="pY"></param>
/// <param name="pRadius"></param>
/// <param name="pColor"></param>
public override void DrawCircle(float pX, float pY, float pRadius, float pWidth, bool pDashed, Maths.Color4 pColor)
{
SMX.Maths.Vector2 start = GetScreenCoords(pX, pY);
SMX.Maths.Vector2 radScreen = GetScreenCoords(pRadius, pRadius);
Pen pen = new Pen(pColor.ToGDI(), pWidth);
if (pDashed)
{
pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;
}
else
{
pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Solid;
}
float width = radScreen.X * 2;
mGraphics.DrawEllipse(pen, start.X - width / 2, start.Y - width / 2, width, width);
}
/// <summary>
///
/// </summary>
/// <param name="pX"></param>
/// <param name="pY"></param>
/// <param name="pRadius"></param>
/// <param name="pColor"></param>
public override void DrawCircle(float pX, float pY, float pRadius, float pWidth, bool pDashed, Maths.Color4 pColor)
{
SolidColorBrush brush = new SolidColorBrush(mRenderTarget2D, pColor.ToSDX());
SharpDX.Vector2 start = GetScreenCoords(pX, pY).ToSDX();
SMX.Maths.Vector2 radScreen = GetScreenCoords(pRadius, pRadius);
if (pDashed)
{
StrokeStyleProperties props = new StrokeStyleProperties();
props.DashCap = CapStyle.Flat;
props.EndCap = CapStyle.Flat;
props.StartCap = CapStyle.Flat;
props.DashOffset = 0;
props.DashStyle = DashStyle.Dash;
props.LineJoin = LineJoin.Round;
SharpDX.Direct2D1.StrokeStyle strokeStyle = new StrokeStyle(mFactory2D, props);
mRenderTarget2D.DrawEllipse(new Ellipse(start, radScreen.X, radScreen.X), brush, pWidth, strokeStyle);
}
else
{
mRenderTarget2D.DrawEllipse(new Ellipse(start, radScreen.X, radScreen.X), brush, pWidth);
}
}