/// <summary>
/// draws a 3d coordinate system overlay in the canonical volume
/// </summary>
/// <param name="draw"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="z"></param>
/// <param name="flipY"></param>
public static void Draw(Direct2D.Context draw, Float3 x, Float3 y, Float3 z, bool flipY)
{
draw.FillCircle(Float2.Zero, 1.0f, new Color(0.5f));
// do some coordinate shuffling because of weird coordinate systems
y = -y;
z = -z;
x = -x;
x.X = -x.X;
y.X = -y.X;
z.X = -z.X;
if (flipY)
{
y = -y;
}
var draws = new List <Drawable>
{
new Drawable(x, xColor, "x"),
new Drawable(-x, xColor, null),
new Drawable(y, yColor, "y"),
new Drawable(-y, yColor, null),
new Drawable(z, zColor, "z"),
new Drawable(-z, zColor, null),
};
draws.Sort();
foreach (var drawable in draws)
{
drawable.Draw(draw);
}
}
public void Draw(Direct2D.Context draw)
{
float labelThreshold = -0.05f;
var lineColor = new Color(color.Red * 0.7f, color.Green * 0.7f, color.Blue * 0.7f);
var center = vector.XY * radius;
if (label != null && vector.Z >= labelThreshold)
{
draw.Line(Float2.Zero, center, stroke, lineColor);
}
draw.FillCircle(center, circleRadius, color);
if (label == null)
{
return;
}
var tl = center + new Float2(-textRadius, textRadius);
var tr = center + new Float2(textRadius, textRadius);
var bl = center + new Float2(-textRadius, -textRadius);
var br = center + new Float2(textRadius, -textRadius);
switch (label)
{
case "x":
draw.Line(tl, br, textStroke, Colors.Black);
draw.Line(tr, bl, textStroke, Colors.Black);
break;
case "y":
draw.Line(center, tl, textStroke, Colors.Black);
draw.Line(center, tr, textStroke, Colors.Black);
draw.Line(center, center - new Float2(0.0f, textRadius), textStroke, Colors.Black);
break;
case "z":
draw.Line(tl, tr, textStroke, Colors.Black);
draw.Line(tr, bl, textStroke, Colors.Black);
draw.Line(bl, br, textStroke, Colors.Black);
break;
}
if (label != null && vector.Z <= labelThreshold)
{
draw.Line(Float2.Zero, center, stroke, lineColor);
}
}
