private void OnShaken(Accelerometer sender, AccelerometerShakenEventArgs args)
{
((MainPageVM) DataContext).WasShaken();
Path[] paths;
if (zoom.IsZoomedInViewActive)
{
paths = GetVisiblePaths();
}
else
{
paths = GetAllPaths();
}
int MaxParts = 100;
foreach (Path geo in paths)
{
for (int i = 0; i < MaxParts; i++)
{
// The geometry allows us to get the position and
// the tangent at a given fraction length.
Geometry flattened = GetFlattenedPathGeometry(geo.Data);
Point tangent;
Point point;
GetPointAtFractionLength(flattened, (i/MaxParts), out point, out tangent);
// Create the visual representation of the broken part.
var rectangle = new Rectangle
{
Width = 8,
Height = 3,
Fill = new SolidColorBrush(Colors.Black),
RadiusX = 1.5,
RadiusY = 1.5
};
// Add the rectangle to the explosion area and set the position
Canvas.SetLeft(rectangle, point.X - (rectangle.Width/2));
Canvas.SetTop(rectangle, point.Y - (rectangle.Height/2));
((Canvas) geo.Parent).Children.Add(rectangle);
// For a good look, the rectangle shall be rotated,
// based on the tangent of the point.
var v = new Vector(tangent.X, tangent.Y);
v.Normalize();
double angle = Vector.AngleBetween(new Vector(1, 0), v);
rectangle.RenderTransform = new RotateTransform
{
Angle = angle,
CenterX = rectangle.Width/2,
CenterY = rectangle.Height/2
};
}
}
}
public static double AngleBetween(Vector v1, Vector v2)
{
return 0;
}