GeneralTransform3DTo2D.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media3D / GeneralTransform3DTo2D.cs / 1 / GeneralTransform3DTo2D.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Declaration of the GeneralTransform3DTo2D class. 
//
//--------------------------------------------------------------------------- 

using System.Windows.Media;
using System.Windows.Media.Animation;
 
using SR = MS.Internal.PresentationCore.SR;
using SRID = MS.Internal.PresentationCore.SRID; 
 
namespace System.Windows.Media.Media3D
{ 
    /// 
    /// GeneralTransform3DTo2D class provides services to transform points and rects in 3D to 2D
    /// 
    public class GeneralTransform3DTo2D : Freezable 
    {
        internal GeneralTransform3DTo2D() 
        { 
            _transformBetween2D = null;

        } 

        internal GeneralTransform3DTo2D(Matrix3D projectionTransform, GeneralTransform transformBetween2D)
        {
            _projectionTransform = projectionTransform; 
            _transformBetween2D = (GeneralTransform)transformBetween2D.GetAsFrozen();
        } 
 
        /// 
        /// Transform a point 
        /// 
        /// Input point
        /// Output point
        /// True if the point was transformed successfuly, false otherwise 
        public bool TryTransform(Point3D inPoint, out Point result)
        { 
            bool success = false; 
            result = new Point();
 
            // project the point
            if (_projectionTransform != null)
            {

                Point3D projectedPoint = _projectionTransform.Transform(inPoint); 

                if (_transformBetween2D != null) 
                { 
                    result = _transformBetween2D.Transform(new Point(projectedPoint.X, projectedPoint.Y));
                    success = true; 
                }
            }

            return success; 
        }
 
        ///  
        /// Transform a point from 3D in to 2D
        /// 
        /// If the transformation does not succeed, this will throw an InvalidOperationException.
        /// If you don't want to try/catch, call TryTransform instead and check the boolean it
        /// returns.
        /// 
        /// 
        /// Input point 
        /// The transformed point 
        public Point Transform(Point3D point)
        { 
            Point transformedPoint;

            if (!TryTransform(point, out transformedPoint))
            { 
                throw new InvalidOperationException(SR.Get(SRID.GeneralTransform_TransformFailed, null));
            } 
 
            return transformedPoint;
        } 

        /// 
        /// Transform a Rect3D to a Rect.  If this transformation cannot be completed Rect.Empty is returned.
        ///  
        /// Input 3D bounding box
        /// The 2D bounding box of the projection of these points 
        public Rect TransformBounds(Rect3D rect3D) 
        {
            if (_transformBetween2D != null) 
            {
                return _transformBetween2D.TransformBounds(MILUtilities.ProjectBounds(ref _projectionTransform, ref rect3D));
            }
            else 
            {
                return Rect.Empty; 
            } 
        }
 
        /// 
        /// Implementation of Freezable.CreateInstanceCore.
        /// 
        /// The new Freezable. 
        protected override Freezable CreateInstanceCore()
        { 
            return new GeneralTransform3DTo2D(); 
        }
 

        /// 
        /// Implementation of Freezable.CloneCore.
        ///  
        /// 
        protected override void CloneCore(Freezable sourceFreezable) 
        { 
            GeneralTransform3DTo2D transform = (GeneralTransform3DTo2D)sourceFreezable;
            base.CloneCore(sourceFreezable); 
            CopyCommon(transform);
        }

 
        /// 
        /// Implementation of Freezable.CloneCurrentValueCore. 
        ///  
        /// 
        protected override void CloneCurrentValueCore(Freezable sourceFreezable) 
        {
            GeneralTransform3DTo2D transform = (GeneralTransform3DTo2D)sourceFreezable;
            base.CloneCurrentValueCore(sourceFreezable);
            CopyCommon(transform); 
        }
 
 
        /// 
        /// Implementation of Freezable.GetAsFrozenCore. 
        /// 
        /// 
        protected override void GetAsFrozenCore(Freezable sourceFreezable)
        { 
            GeneralTransform3DTo2D transform = (GeneralTransform3DTo2D)sourceFreezable;
            base.GetAsFrozenCore(sourceFreezable); 
            CopyCommon(transform); 
        }
 

        /// 
        /// Implementation of Freezable.GetCurrentValueAsFrozenCore.
        ///  
        /// 
        protected override void GetCurrentValueAsFrozenCore(Freezable sourceFreezable) 
        { 
            GeneralTransform3DTo2D transform = (GeneralTransform3DTo2D)sourceFreezable;
            base.GetCurrentValueAsFrozenCore(sourceFreezable); 
            CopyCommon(transform);
        }

        ///  
        /// Clones values that do not have corresponding DPs
        ///  
        ///  
        private void CopyCommon(GeneralTransform3DTo2D transform)
        { 
            _projectionTransform = transform._projectionTransform;
            _transformBetween2D = transform._transformBetween2D;
        }
 

        private Matrix3D _projectionTransform; 
        private GeneralTransform _transformBetween2D; 

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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GeneralTransform3DTo2D.cs source code in C# .NET

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