void hVp3D_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
if (_enableHover)
{
var point = Mouse.GetPosition(hVp3D);
Point3D pnt;
Vector3D normal;
Model3D model;
if (hVp3D.FindNearest(point, out pnt, out normal, out model))
{
OnModelHovered(model);
}
}
}
/// <summary>
/// Find the coordinates of the nearest point given a 2D position in the viewport
/// </summary>
/// <param name="viewport">The viewport.</param>
/// <param name="position">The position.</param>
/// <returns>The nearest point, or null if no point was found.</returns>
public static Point3D?FindNearestPoint(this Viewport3DX viewport, Point position)
{
if (viewport.FindNearest(position.ToVector2(), out var p, out var n, out var model))
{
return(p.ToPoint3D());
}
return(null);
}
/// <summary>
/// Finds the nearest point and its normal.
/// </summary>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="position">
/// The position.
/// </param>
/// <param name="point">
/// The point.
/// </param>
/// <param name="normal">
/// The normal.
/// </param>
/// <param name="model">
/// The model.
/// </param>
/// <param name="node"></param>
/// <returns>
/// The find nearest.
/// </returns>
public static bool FindNearest(this Viewport3DX viewport, Point position,
out Vector3 point, out Vector3 normal, out Element3D model, out SceneNode node)
{
model = null;
node = null;
if (viewport.FindNearest(position.ToVector2(), out point, out normal, out var m))
{
if (m is Element3D ele)
{
model = ele;
node = ele.SceneNode;
}
else if (m is SceneNode nd)
{
node = nd;
model = null;
}
return(true);
}
return(false);
}
/// <summary>
/// Finds the nearest point and its normal.
/// </summary>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="position">
/// The position.
/// </param>
/// <param name="point">
/// The point.
/// </param>
/// <param name="normal">
/// The normal.
/// </param>
/// <param name="model">
/// The model.
/// </param>
/// <param name="node"></param>
/// <returns>
/// The find nearest.
/// </returns>
public static bool FindNearest(this Viewport3DX viewport, Point position,
out Point3D point, out Vector3D normal, out Element3D model, out SceneNode node)
{
var succ = viewport.FindNearest(position.ToVector2(), out var p, out var n, out var m);
point = p.ToPoint3D();
normal = n.ToVector3D();
if (m is Element3D ele)
{
model = ele;
node = ele.SceneNode;
}
else if (m is SceneNode nd)
{
node = nd;
model = null;
}
else
{
model = null;
node = null;
}
return(succ);
}
