private static void DrawPlane(DisplayPipeline di, RhinoViewport vp, Plane plane)
{
double num;
if (!vp.GetWorldToScreenScale(plane.Origin, out num))
return;
var unit = 10.0;
if ((unit * num) < 20.0)
unit = 20.0 / num;
unit *= 0.2;
var min = -5;
var max = 5;
for (var x = min; x <= max; x++)
{
var p0 = plane.PointAt(min * unit, x * unit);
var p1 = plane.PointAt(max * unit, x * unit);
if (x == 0)
{
var origin = plane.Origin;
di.DrawLine(p0, origin, Color.Gray);
di.DrawLine(origin, p1, Color.DarkRed, 3);
di.DrawArrowHead(p1, p1 - origin, Color.DarkRed, 0.0, 1.0 * unit);
}
else
{
di.DrawLine(p0, p1, Color.Gray);
}
}
for (var y = min; y <= max; y++)
{
var p0 = plane.PointAt(y * unit, min * unit);
var p1 = plane.PointAt(y * unit, max * unit);
if (y == 0)
{
var origin = plane.Origin;
di.DrawLine(p0, origin, Color.Gray);
di.DrawLine(origin, p1, Color.DarkGreen, 3);
di.DrawArrowHead(p1, p1 - origin, Color.DarkGreen, 0.0, 1.0 * unit);
}
else
{
di.DrawLine(p0, p1, Color.Gray);
}
}
}