/// <summary>
/// Gets the distance from the camera for the specified visual.
/// </summary>
/// <param name="c">
/// The visual.
/// </param>
/// <param name="cameraPos">
/// The camera position.
/// </param>
/// <param name="transform">
/// The total transform of the visual.
/// </param>
/// <returns>
/// The camera distance.
/// </returns>
private double GetCameraDistance(Visual3D c, Point3D cameraPos, Transform3D transform)
{
var bounds = Visual3DHelper.FindBounds(c, transform);
switch (this.Method)
{
case SortingMethod.BoundingBoxCenter:
var mid = new Point3D(
bounds.X + bounds.SizeX * 0.5, bounds.Y + bounds.SizeY * 0.5, bounds.Z + bounds.SizeZ * 0.5);
return((mid - cameraPos).LengthSquared);
case SortingMethod.BoundingBoxCorners:
double d = double.MaxValue;
d = Math.Min(d, cameraPos.DistanceTo(new Point3D(bounds.X, bounds.Y, bounds.Z)));
d = Math.Min(d, cameraPos.DistanceTo(new Point3D(bounds.X + bounds.SizeX, bounds.Y, bounds.Z)));
d = Math.Min(
d, cameraPos.DistanceTo(new Point3D(bounds.X + bounds.SizeX, bounds.Y + bounds.SizeY, bounds.Z)));
d = Math.Min(d, cameraPos.DistanceTo(new Point3D(bounds.X, bounds.Y + bounds.SizeY, bounds.Z)));
d = Math.Min(d, cameraPos.DistanceTo(new Point3D(bounds.X, bounds.Y, bounds.Z + bounds.SizeZ)));
d = Math.Min(
d, cameraPos.DistanceTo(new Point3D(bounds.X + bounds.SizeX, bounds.Y, bounds.Z + bounds.SizeZ)));
d = Math.Min(
d,
cameraPos.DistanceTo(
new Point3D(bounds.X + bounds.SizeX, bounds.Y + bounds.SizeY, bounds.Z + bounds.SizeZ)));
d = Math.Min(
d, cameraPos.DistanceTo(new Point3D(bounds.X, bounds.Y + bounds.SizeY, bounds.Z + bounds.SizeZ)));
return(d);
default:
var boundingSphere = BoundingSphere.CreateFromRect3D(bounds);
return(boundingSphere.DistanceFrom(cameraPos));
}
}
/// <summary>
/// Zooms to fit the extents of the specified viewport.
/// </summary>
/// <param name="camera">
/// The actual camera.
/// </param>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void ZoomExtents(this ProjectionCamera camera, Viewport3D viewport, double animationTime = 0)
{
var bounds = Visual3DHelper.FindBounds(viewport.Children);
var diagonal = new Vector3D(bounds.SizeX, bounds.SizeY, bounds.SizeZ);
if (bounds.IsEmpty || diagonal.LengthSquared < double.Epsilon)
{
return;
}
ZoomExtents(camera, viewport, bounds, animationTime);
}
/// <summary>
/// Gets the distance squared.
/// </summary>
/// <param name="position">
/// The position.
/// </param>
/// <param name="visual">
/// The visual.
/// </param>
/// <returns>
/// The get distance squared.
/// </returns>
public static double GetDistanceSquared(Point3D position, Visual3D visual)
{
var bounds = Visual3DHelper.FindBounds(visual, Transform3D.Identity);
return(Point3D.Subtract(bounds.Location, position).LengthSquared);
}
