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//---------------------------------------------------------------------------
//
// <copyright file="Model3DGroup.cs" company="Microsoft">
// Copyright (C) Microsoft Corporation. All rights reserved.
// </copyright>
//
//
// Description: 3D model collection.
//
// See spec at http://avalon/medialayer/Specifications/Avalon3D%20API%20Spec.mht
//
// History:
// 06/28/2003 : t-gregr - Created
//
//---------------------------------------------------------------------------
using System;
using System.Collections;
using System.Diagnostics;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Media3D;
using System.Windows.Markup;
using MS.Internal;
using MS.Internal.Media3D;
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID;
namespace System.Windows.Media.Media3D
{
/// <summary>
/// 3D model group.
/// </summary>
[ContentProperty("Children")]
public sealed partial class Model3DGroup : Model3D
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
/// <summary>
/// Default constructor.
/// </summary>
public Model3DGroup() {}
#endregion Constructors
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
internal override void RayHitTestCore(
RayHitTestParameters rayParams)
{
Model3DCollection children = Children;
if (children == null)
{
return;
}
for (int i = children.Count - 1; i >= 0; i--)
{
Model3D child = children.Internal_GetItem(i);
// Perform the hit-test against the child.
child.RayHitTest(rayParams);
}
}
internal override Rect3D CalculateSubgraphBoundsInnerSpace()
{
Model3DCollection children = Children;
if (children == null)
{
return Rect3D.Empty;
}
Rect3D bounds = Rect3D.Empty;
for (int i = 0, count = children.Count; i < count; i++)
{
Model3D child = children.Internal_GetItem(i);
// Calls CSBOS rather than Bounds to avoid ReadPreamble.
bounds.Union(child.CalculateSubgraphBoundsOuterSpace());
}
return bounds;
}
#endregion Internal Methods
//------------------------------------------------------
//
// Internal Properties
//
//------------------------------------------------------
#region Internal Properties
// named EmptyGroup not to collide with public Model3D.Empty
internal static Model3DGroup EmptyGroup
{
get
{
if (s_empty == null)
{
s_empty = new Model3DGroup();
s_empty.Freeze();
}
return s_empty;
}
}
#endregion Internal Properties
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
private static Model3DGroup s_empty;
#endregion Private Fields
}
}
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