/// <summary>
/// Gets the transform.
/// </summary>
/// <param name="current">
/// The current.
/// </param>
/// <param name="model">
/// The model.
/// </param>
/// <param name="parentTransform">
/// The parent transform.
/// </param>
/// <returns>
/// The transform.
/// </returns>
private static GeneralTransform3D GetTransform(Model3D current, Model3D model, Transform3D parentTransform)
{
var currentTransform = Transform3DHelper.CombineTransform(current.Transform, parentTransform);
if (current == model)
{
return(currentTransform);
}
var mg = current as Model3DGroup;
if (mg != null)
{
foreach (var m in mg.Children)
{
var result = GetTransform(m, model, currentTransform);
if (result != null)
{
return(result);
}
}
}
return(null);
}
/// <summary>
/// Traverses the visual tree and invokes the specified action on each object of the specified type.
/// </summary>
/// <typeparam name="T">
/// The type filter.
/// </typeparam>
/// <param name="visual">
/// The visual.
/// </param>
/// <param name="transform">
/// The transform.
/// </param>
/// <param name="action">
/// The action.
/// </param>
private static void Traverse<T>(Visual3D visual, Transform3D transform, Action<T, Transform3D> action)
where T : Model3D
{
var childTransform = Transform3DHelper.CombineTransform(visual.Transform, transform);
var model = GetModel(visual);
if (model != null)
{
TraverseModel(model, childTransform, action);
}
foreach (var child in GetChildren(visual))
{
Traverse(child, childTransform, action);
}
}
/// <summary>
/// Traverses the Model3D tree. Run the specified action for each Model3D.
/// </summary>
/// <typeparam name="T">
/// </typeparam>
/// <param name="model">
/// The model.
/// </param>
/// <param name="transform">
/// The transform.
/// </param>
/// <param name="action">
/// The action.
/// </param>
public static void TraverseModel<T>(Model3D model, Transform3D transform, Action<T, Transform3D> action)
where T : Model3D
{
var mg = model as Model3DGroup;
if (mg != null)
{
var childTransform = Transform3DHelper.CombineTransform(model.Transform, transform);
foreach (var m in mg.Children)
{
TraverseModel(m, childTransform, action);
}
}
var gm = model as T;
if (gm != null)
{
var childTransform = Transform3DHelper.CombineTransform(model.Transform, transform);
action(gm, childTransform);
}
}
/// <summary>
/// Finds the bounding box for the specified visual.
/// </summary>
/// <param name="visual">
/// The visual.
/// </param>
/// <param name="transform">
/// The transform of the visual.
/// </param>
/// <returns>
/// A <see cref="Rect3D"/>.
/// </returns>
public static Rect3D FindBounds(Visual3D visual, Transform3D transform)
{
var bounds = Rect3D.Empty;
var childTransform = Transform3DHelper.CombineTransform(visual.Transform, transform);
var model = GetModel(visual);
if (model != null)
{
// apply transform
var transformedBounds = childTransform.TransformBounds(model.Bounds);
if (!double.IsNaN(transformedBounds.X))
{
bounds.Union(transformedBounds);
}
}
foreach (var child in GetChildren(visual))
{
var b = FindBounds(child, childTransform);
bounds.Union(b);
}
return bounds;
}
