/// <summary>
/// Invoked when an unhandled MouseLeftButtonDown routed event is raised on this element.
/// </summary>
/// <param name="e">The MouseButtonEventArgs that contains the event data.</param>
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
Keyboard.Focus(this);
// if (!System.Deployment.Application.ApplicationDeployment.IsNetworkDeployed)
{
if (!((Keyboard.Modifiers & ModifierKeys.Control) > 0) && (!this.IsDragging))
{
// Memorizations must occur before CaptureAndHideMouse() call
// GetCursorPos(out _dragOriginScreenPoint);
// Mouse.GetPosition(
// _dragOriginScreenPoint = _viewport.PointToScreen(point);
_viewport = Helper3D.GetViewport3D(this);
_dragOriginPoint = e.GetPosition(this);
// CaptureAndHideMouse Moves the mouse
CaptureAndHideMouse();
base.SetValue(IsDraggingPropertyKey, true);
base.SetValue(IsSelectedPropertyKey, true);
}
}
base.OnMouseLeftButtonDown(e);
}
/// <summary>
/// Build a MeshGeometry3D object from the Sculptor object.
/// Points should be initialized before the call.
/// Fires a BuiltMesh event, where custom texture coordinates may be created.
/// </summary>
/// <returns>MeshGeometry3D object</returns>
public void BuildMesh()
{
CreateTriangles();
_mesh = new MeshGeometry3D();
foreach (Point3DTriplet tpl in this._triangles)
{
Helper3D.BuildTriangleMesh(_mesh, tpl.Points[0], tpl.Points[1], tpl.Points[2]);
}
}
/// <summary>
/// Captures and hides the mouse.
/// </summary>
protected void CaptureAndHideMouse()
{
base.CaptureMouse();
Mouse.OverrideCursor = Cursors.None;
// code specific to 3D
Viewport3D viewport = Helper3D.GetViewport3D(this);
// GeneralTransform3DTo2D transform = this.TransformToAncestor(ancestor);
// Point pScreen = transform.Transform(<3d point from the mesh in myVisual3D space>);
Point p = new Point(
_dragOriginPoint.X,
_dragOriginPoint.Y - (DragHeight * Rate));
Point pScreen = viewport.PointToScreen(p);
SetCursorPos(
Convert.ToInt32(pScreen.X),
Convert.ToInt32(pScreen.Y));
}
/// <summary>
/// Rounds a vertex of a triangle.
/// </summary>
/// <param name="pA">First point.</param>
/// <param name="pB">Second point. Vertex to round</param>
/// <param name="pC">Third point.</param>
/// <param name="roundingRate">Vertex rounding rate. The value must be comprized between 0.0 and 0.5.</param>
/// <returns></returns>
public static Point3DCollection RoundCorner(Point3D pA, Point3D pB, Point3D pC, double roundingRate)
{
if (!((pA.Z == pB.Z) && (pB.Z == pC.Z))
)
{
throw new ArgumentOutOfRangeException("pA");
}
if ((roundingRate < 0.0) ||
(roundingRate > 0.5)
)
{
throw new ArgumentOutOfRangeException("roundingRate");
}
Point3DCollection points = new Point3DCollection();
int roundingDefinition = (int)(roundingRate * 40.0);
Vector3D v1 = new Vector3D();
v1 = pA - pB;
v1.X = Math.Round(v1.X, 3);
v1.Y = Math.Round(v1.Y, 3);
v1.Z = Math.Round(v1.Z, 3);
Point3D p1 = Point3D.Add(pB, Vector3D.Multiply(v1, roundingRate));
Vector3D v2 = new Vector3D();
v2 = pC - pB;
v2.X = Math.Round(v2.X, 3);
v2.Y = Math.Round(v2.Y, 3);
v2.Z = Math.Round(v2.Z, 3);
Point3D p2 = Point3D.Add(pB, Vector3D.Multiply(v2, roundingRate));
// v1 is the normal vector for the linear curve
// v1.X*x + v1.Y*y + c1 = 0;
// p1 is woned by this curve so
double c1 = -(v1.X * p1.X) - (v1.Y * p1.Y);
// same for v2 and p2
double c2 = -(v2.X * p2.X) - (v2.Y * p2.Y);
// center for the arc that owns p1 and p2
Point3D center = new Point3D();
if (v1.Y == 0.0)
{
if (v1.X == 0.0)
{
throw new InvalidOperationException();
}
center.X = -c1 / v1.X;
if (v2.Y == 0.0)
{
throw new InvalidOperationException();
}
else
{
center.Y = (-c2 - v2.X * center.X) / v2.Y;
}
}
else
{
if (v2.Y == 0.0)
{
if (v2.X == 0.0)
{
throw new InvalidOperationException();
}
center.X = -c2 / v2.X;
}
else
{
center.X = (c1 / v1.Y - c2 / v2.Y) / (v2.X / v2.Y - v1.X / v1.Y);
}
center.Y = (-c1 - v1.X * center.X) / v1.Y;
}
center.Z = pB.Z;
// angle of the arc between p1 and p2
// 360 - 180 - Vector3D.AngleBetween(v1, v2)
double angleArc = Helper3D.DegreeToRadian(180 - Vector3D.AngleBetween(v1, v2));
// angle of each part
double angleStep = angleArc / roundingDefinition;
Vector3D vRadius = p1 - center;
double angleBaseDeg = Vector3D.AngleBetween(new Vector3D(1, 0, 0), vRadius);
// necessar adjustment because of Vector3D.AngleBetween() - see documentation
if (p1.Y < 0.0)
{
angleBaseDeg = 360 - angleBaseDeg;
}
double angleBase = Helper3D.DegreeToRadian(angleBaseDeg);
points.Add(p1);
// points of the arc
for (int j = 1; j <= roundingDefinition - 1; j++)
{
double angle = angleBase + (angleStep * j);
Point3D p = new Point3D();
p.X = center.X + Math.Cos(angle) * vRadius.Length;
p.Y = center.Y + Math.Sin(angle) * vRadius.Length;
p.Z = pB.Z;
points.Add(p);
}
points.Add(p2);
return(points);
}
