public MainPage()
{
InitializeComponent();
mesh = (SharedLineMesh)Activator.CreateInstance(figureType);
sharedLines = mesh.SharedLines.ToArray();
lineViews = new LineView[sharedLines.Length];
// Set up page with LineView elements.
AbsoluteLayout absoluteLayout = new AbsoluteLayout
{
};
for (int i = 0; i < lineViews.Length; i++)
{
lineViews[i] = new LineView
{
Thickness = 3
};
absoluteLayout.Children.Add(lineViews[i]);
}
contentStack.Children.Add(absoluteLayout);
App.pg = this;
}
// Argument is SharedLineMesh derivative in Forms3D
public DisplayPage()
{
Title = figureType.Name;
SharedLineMesh mesh = (SharedLineMesh)Activator.CreateInstance(figureType);
SharedLine[] sharedLines = mesh.SharedLines.ToArray();
LineView[] lineViews = new LineView[sharedLines.Length];
// Set up page with LineView elements.
AbsoluteLayout absoluteLayout = new AbsoluteLayout();
for (int i = 0; i < lineViews.Length; i++)
{
lineViews[i] = new LineView
{
Thickness = 3
};
absoluteLayout.Children.Add(lineViews[i]);
}
this.Content = absoluteLayout;
// Run animation.
stopwatch.Start();
Device.StartTimer(TimeSpan.FromMilliseconds(100), () =>
{
double totalSeconds = stopwatch.Elapsed.TotalSeconds;
Matrix4D matX = Matrix4D.RotationX(0);
Matrix4D matY = Matrix4D.RotationY(0);
Matrix4D matZ = Matrix4D.RotationZ(0);
Matrix4D matView = Matrix4D.OrthographicView(new Point(this.Width / 2, this.Height / 2),
Math.Min(this.Width, this.Height) / 4);
// Get composite 3D transform matrix.
Matrix4D matrix = matX * matY * matZ * matView;
// Loop through the shared lines that comprise the figure.
for (int i = 0; i < sharedLines.Length; i++)
{
// Transform the points and normals of those points.
Point3D point1 = sharedLines[i].Point1 * matrix;
Point3D point2 = sharedLines[i].Point2 * matrix;
Vector3D normal1 = (Point3D)((Point3D)(sharedLines[i].Normal1) * matrix);
Vector3D normal2 = (Point3D)((Point3D)(sharedLines[i].Normal2) * matrix);
// Set each LineView to its new position.
lineViews[i].Point1 = point1;
lineViews[i].Point2 = point2;
// Determine if the line is visible or hidden.
bool isFacing = normal1.Z > 0 || normal2.Z > 0;
lineViews[i].Color = isFacing ? Color.Accent : Color.FromRgba(0.75, 0.75, 0.75, 0.5);
}
return(!stopAnimation);
});
}