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/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media3D / Model3DGroup.cs / 1 / Model3DGroup.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: 3D model collection. // // See spec at [....]/medialayer/Specifications/Avalon3D%20API%20Spec.mht // // History: // 06/28/2003 : [....] - 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 { ////// 3D model group. /// [ContentProperty("Children")] public sealed partial class Model3DGroup : Model3D { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors ////// Default constructor. /// public Model3DGroup() {} #endregion Constructors //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- #region Public Methods #endregion Public Methods ////// Override of OnChanged that propagates an internal dirty bit up the tree /// protected override void OnChanged() { base.OnChanged(); // It's possible that... // 1) A child just changed // 2) A child was just inserted/removed // 3) The Children collection changed // ...so we need to update our dirty flag bool dirtyForPreCompute = false; Model3DCollection children = Children; if (children != null) { int count = children.Count; for (int i = 0; i < count; i++) { dirtyForPreCompute |= children.Internal_GetItem(i)._flags[DirtyForPreComputeFlag]; } } _flags[DirtyForPreComputeFlag] = dirtyForPreCompute; } //------------------------------------------------------ // // 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; } internal override void PreCompute() { Debug.Assert(_flags[DirtyForPreComputeFlag]); Model3DCollection children = Children; bool requiresRealization = false; if (children != null) { int count = children.Count; for (int i = 0; i < count; i++) { Model3D child = children.Internal_GetItem(i); if (child._flags[DirtyForPreComputeFlag]) { child.PreCompute(); } requiresRealization |= child._flags[RequiresRealizationFlag]; } } _flags[RequiresRealizationFlag] = requiresRealization; _flags[DirtyForPreComputeFlag] = false; } ////// Traverses the model group to mark all realizations. /// internal override void MarkVisibleRealizations(RealizationContext rc) { Debug.Assert(_flags[RequiresRealizationFlag]); Transform3D transform3D = Transform; Matrix3DStack stack3D = rc.Transform3DStack; if (transform3D != null) { stack3D.Push(transform3D.Value); } Model3DCollection children = Children; if (children != null) { int count = children.Count; for (int i = 0; i < count; i++) { Model3D child = children.Internal_GetItem(i); if (child._flags[RequiresRealizationFlag]) { child.MarkVisibleRealizations(rc); } } } if (transform3D != null) { stack3D.Pop(); } } #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 } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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