/// <summary>
/// Sets mouse down point.
/// </summary>
/// <param name="position">
/// The position.
/// </param>
private void SetMouseDownPoint(Point position)
{
this.MouseDownPoint = position.ToVector2();
if (!this.Controller.Viewport.FixedRotationPointEnabled && this.Controller.Viewport.FindHitsInFrustum(this.MouseDownPoint, ref hits))
{
if (hits.Count > 0)
{
MouseDownNearestPoint3D = hits[0].PointHit;
if (hits[0].ModelHit is Element3D ele)
{
MouseDownNearestModelBoundCenter = ele.BoundsWithTransform.Center;
}
else if (hits[0].ModelHit is Model.Scene.SceneNode node)
{
MouseDownNearestModelBoundCenter = node.BoundsWithTransform.Center;
}
}
}
else
{
MouseDownNearestModelBoundCenter = null;
MouseDownNearestPoint3D = null;
}
this.MouseDownPoint3D = this.UnProject(position);
}
/// <summary>
/// Occurs when the position is changed during a manipulation.
/// </summary>
/// <param name="e">The <see cref="Point"/> instance containing the event data.</param>
public override void Delta(Point e)
{
var delta = e.ToVector2() - this.LastPoint.ToVector2();
this.LastPoint = e;
this.Zoom(delta.Y * 0.01, this.zoomPoint3D);
}
/// <summary>
/// Sets mouse down point.
/// </summary>
/// <param name="position">
/// The position.
/// </param>
private void SetMouseDownPoint(Point position)
{
this.MouseDownPoint = position.ToVector2();
if (!this.Controller.Viewport.FixedRotationPointEnabled &&
this.Controller.Viewport.FindNearest(position, out var nearestPoint, out var normal, out var visual))
{
this.MouseDownNearestPoint3D = nearestPoint;
}
/// <summary>
/// Occurs when the position is changed during a manipulation.
/// </summary>
/// <param name="e">The <see cref="Point"/> instance containing the event data.</param>
public override void Delta(Point e)
{
base.Delta(e);
double ar = this.Controller.Viewport.ActualHeight / this.Controller.Viewport.ActualWidth;
var delta = this.MouseDownPoint.ToVector2() - e.ToVector2();
if (Math.Abs(delta.Y / delta.X) < ar)
{
delta.Y = (float)(Math.Sign(delta.Y) * Math.Abs(delta.X * ar));
}
else
{
delta.X = (float)(Math.Sign(delta.X) * Math.Abs(delta.Y / ar));
}
this.zoomRectangle = new Rect(this.MouseDownPoint, (this.MouseDownPoint.ToVector2() - delta).ToPoint());
//this.Viewport.ShowZoomRectangle(this.zoomRectangle);
}
/// <summary>
/// Un-projects a point from the screen (2D) to a point on plane (3D)
/// </summary>
/// <param name="p">
/// The 2D point.
/// </param>
/// <param name="position">
/// plane position
/// </param>
/// <param name="normal">
/// plane normal
/// </param>
/// <returns>
/// A 3D point.
/// </returns>
public Point3D?UnProject(Point p, Point3D position, Vector3D normal)
{
return(UnProject(p.ToVector2(), position, normal));
}
public static Ray UnProject(this Viewport3DX viewport, Point point2d)
{
return(UnProject(viewport, point2d.ToVector2()));
}