| public Transform ( global point ) : global::Windows.Foundation.Point | ||
| point | global | |
| return | global::Windows.Foundation.Point | |
private static Rect RectTransform(Rect rect, Matrix matrix)
{
Point leftTop = matrix.Transform(new Point(rect.Left, rect.Top));
Point rightTop = matrix.Transform(new Point(rect.Right, rect.Top));
Point leftBottom = matrix.Transform(new Point(rect.Left, rect.Bottom));
Point rightBottom = matrix.Transform(new Point(rect.Right, rect.Bottom));
double left = Math.Min(Math.Min(leftTop.X, rightTop.X), Math.Min(leftBottom.X, rightBottom.X));
double top = Math.Min(Math.Min(leftTop.Y, rightTop.Y), Math.Min(leftBottom.Y, rightBottom.Y));
double right = Math.Max(Math.Max(leftTop.X, rightTop.X), Math.Max(leftBottom.X, rightBottom.X));
double bottom = Math.Max(Math.Max(leftTop.Y, rightTop.Y), Math.Max(leftBottom.Y, rightBottom.Y));
Rect rectTransformed = new Rect(left, top, right - left, bottom - top);
return rectTransformed;
}
/// <summary>
/// Implement Windows Presentation Foundation's Rect.Transform on
/// Silverlight.
/// </summary>
/// <param name="rectangle">The rectangle to transform.</param>
/// <param name="matrix">The matrix to use to transform the rectangle.
/// </param>
/// <returns>The transformed rectangle.</returns>
private static Rect RectTransform(Rect rectangle, Matrix matrix)
{
// WPF equivalent of following code:
// var rectTransformed = Rect.Transform(rect, matrix);
Point leftTop = matrix.Transform(new Point(rectangle.Left, rectangle.Top));
Point rightTop = matrix.Transform(new Point(rectangle.Right, rectangle.Top));
Point leftBottom = matrix.Transform(new Point(rectangle.Left, rectangle.Bottom));
Point rightBottom = matrix.Transform(new Point(rectangle.Right, rectangle.Bottom));
double left = Math.Min(Math.Min(leftTop.X, rightTop.X), Math.Min(leftBottom.X, rightBottom.X));
double top = Math.Min(Math.Min(leftTop.Y, rightTop.Y), Math.Min(leftBottom.Y, rightBottom.Y));
double right = Math.Max(Math.Max(leftTop.X, rightTop.X), Math.Max(leftBottom.X, rightBottom.X));
double bottom = Math.Max(Math.Max(leftTop.Y, rightTop.Y), Math.Max(leftBottom.Y, rightBottom.Y));
Rect rectTransformed = new Rect(left, top, right - left, bottom - top);
return rectTransformed;
}
/*!
* @brief calibrate from the given @a point in relationship to m_calibrateRotationRoot
* @param point the point relative to the rotation root
*/
private void CalibrateFromPoint(Point point) {
float width = (float)m_calibrateRotationRoot.ActualWidth;
float height = (float)m_calibrateRotationRoot.ActualHeight;
// move origin from the top left to the center with y-up and x-right
Matrix matrix = new Matrix(
1, 0,
0, -1,
-width / 2.0, height / 2.0);
Point localPoint = matrix.Transform(point);
float angle = (float)Math.Atan2(localPoint.Y, localPoint.X);
int angleDegrees = (int)(angle * 180.0 / Math.PI);
angleDegrees += 90;
angleDegrees = (angleDegrees + 360) % 360;
angleDegrees = 360 - angleDegrees;
// apply the rotation to the ui
m_rotation.Angle = angleDegrees;
// preview the calibration and limit to 10 Hz
long milliseconds = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
if ((milliseconds - m_lastCommandSentTimeMs) > 100) {
m_sphero.Roll(angleDegrees, 0);
m_lastCommandSentTimeMs = milliseconds;
}
}
