private static void AddArc(ScreenSpaceLines3D line, Point3D center, double radius, int segments, double startAngle, double stopAngle, bool closeEnd)
{
startAngle = Math1D.DegreesToRadians(startAngle);
stopAngle = Math1D.DegreesToRadians(stopAngle);
// swap angles
if (startAngle > stopAngle)
{
double temp = startAngle;
startAngle = stopAngle;
stopAngle = temp;
}
Point3D[] points = new Point3D[segments + 1];
double inc = (stopAngle - startAngle) / segments;
double r = startAngle;
for (int i = 0; i <= segments; i++, r += inc)
{
points[i] = new Point3D(
center.X + (Math.Cos(-r) * radius),
center.Y + (Math.Sin(-r) * radius),
center.Z);
}
line.AddPolygon(closeEnd, points);
}
private static void OnIsVisibleChanged(Object sender, DependencyPropertyChangedEventArgs e)
{
ScreenSpaceLines3D p = (ScreenSpaceLines3D)sender;
bool visible = (bool)e.NewValue;
if (visible)
{
p.Content = p._content;
}
else
{
p.Content = null;
}
}
public static void AddCirle(ScreenSpaceLines3D line, Point3D center, double radius, int segments)
{
AddArc(line, center, radius, segments, 0, 360, false);
}
public static void AddArc(ScreenSpaceLines3D line, Point3D center, double radius, int segments, double startAngle, double stopAngle)
{
AddArc(line, center, radius, segments, startAngle, stopAngle, false);
}