MaterialGroup.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media3D / MaterialGroup.cs / 1 / MaterialGroup.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Material group 
//
//--------------------------------------------------------------------------- 

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 
{ 
    /// 
    ///     Material group 
    /// 
    [ContentProperty("Children")]
    public sealed partial class MaterialGroup : Material
    { 
        //-----------------------------------------------------
        // 
        //  Constructors 
        //
        //----------------------------------------------------- 

        #region Constructors

        ///  
        ///     Default constructor.
        ///  
        public MaterialGroup() {} 

        #endregion Constructors 

        //------------------------------------------------------
        //
        //  Public Methods 
        //
        //----------------------------------------------------- 
 
        #region Public Methods
 
        #endregion Public Methods

        //------------------------------------------------------
        // 
        //  Internal Methods
        // 
        //------------------------------------------------------ 

        #region Internal Methods 

        // If a child changes or is added/removed to this,
        // that will fire changed which will mark the GeometryModel3D
        // containing this as DirtyForPreCompute which will 
        // cause PreCompute() to be called on us.
        // 
        // Thus, we don't need to override OnChanged() and update 
        // _requiresRealization here in MaterialGroup.
 
        internal override bool PreCompute()
        {
            _requiresRealization = false;
 
            MaterialCollection children = Children;
            if (children != null) 
            { 
                int count = children.Count;
                for (int i = 0; i < count; i++) 
                {
                    // Can't early exit on first 'true' because PreCompute
                    // does work that's necessary for every Material that
                    // has text in it 
                    _requiresRealization |= children.Internal_GetItem(i).PreCompute();
                } 
            } 

            return _requiresRealization; 
        }

        internal override void UpdateRealizations(
            RealizationContext ctx, 
            ref Rect bounds
            ) 
        { 
            Debug.Assert(_requiresRealization);
 
            MaterialCollection children = Children;
            if (children != null)
            {
                int count = children.Count; 
                for (int i = 0; i < count; i++)
                { 
                    Material material = children.Internal_GetItem(i); 
                    if (material.RequiresRealization)
                    { 
                        material.UpdateRealizations(ctx, ref bounds);
                    }
                }
            } 
        }
 
        #endregion Internal Methods 

        //----------------------------------------------------- 
        //
        //  Internal Properties
        //
        //------------------------------------------------------ 

        #region Internal Properties 
 
        internal override bool RequiresRealization

        { 
            get
            {
                return _requiresRealization;
            } 
        }
 
        #endregion Internal Properties 

        //----------------------------------------------------- 
        //
        //  Private Fields
        //
        //----------------------------------------------------- 

        #region Private Fields 
 
        private bool _requiresRealization = false;
 
        #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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