GeneralTransform2DTo3D.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media3D / GeneralTransform2DTo3D.cs / 2 / GeneralTransform2DTo3D.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Declaration of the GeneralTransform2DTo3D class. 
//
//--------------------------------------------------------------------------- 

using System.Diagnostics;

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
{
    /// 
    /// TransformTo3D class provides services to transform points from 2D in to 3D 
    /// 
    public class GeneralTransform2DTo3D : Freezable 
    { 
        internal GeneralTransform2DTo3D()
        { 
        }

        internal GeneralTransform2DTo3D(GeneralTransform transform2D,
                                        Viewport2DVisual3D containingVisual3D, 
                                        GeneralTransform3D transform3D)
        { 
            Visual child = containingVisual3D.Visual; 

            Debug.Assert(child != null, "Going from 2D to 3D containingVisual3D.Visual should not be null"); 

            _transform3D = (GeneralTransform3D)transform3D.GetAsFrozen();

            // we also need to go one more level up to handle a transform being placed 
            // on the Viewport2DVisual3D's child
            GeneralTransformGroup transformGroup = new GeneralTransformGroup(); 
            transformGroup.Children.Add((GeneralTransform)transform2D.GetAsFrozen()); 
            transformGroup.Children.Add((GeneralTransform)child.TransformToOuterSpace().GetAsFrozen());
            transformGroup.Freeze(); 
            _transform2D = transformGroup;

            _positions = containingVisual3D.InternalPositionsCache;
            _textureCoords = containingVisual3D.InternalTextureCoordinatesCache; 
            _triIndices = containingVisual3D.InternalTriangleIndicesCache;
 
            _childBounds = child.CalculateSubgraphRenderBoundsOuterSpace(); 
        }
 
        /// 
        /// Transform a point
        /// 
        /// Input point 
        /// Output point
        /// True if the point was transformed successfuly, false otherwise 
        public bool TryTransform(Point inPoint, out Point3D result) 
        {
            Point final2DPoint; 

            // assign this now so that we can return false if needed
            result = new Point3D();
 
            if (!_transform2D.TryTransform(inPoint, out final2DPoint))
            { 
                return false; 
            }
 
            Point texCoord = Viewport2DVisual3D.VisualCoordsToTextureCoords(final2DPoint, _childBounds);

            // need to walk the texture coordinates on the Viewport2DVisual3D
            // and look for where this point intersects one of them 
            Point3D coordPoint;
            if (!Viewport2DVisual3D.Get3DPointFor2DCoordinate(texCoord, 
                                                            out coordPoint, 
                                                            _positions,
                                                            _textureCoords, 
                                                            _triIndices))
            {
                return false;

            } 

            if (!_transform3D.TryTransform(coordPoint, out result)) 
            { 
                return false;
            } 

            return true;
        }
 
        /// 
        /// Transform a point from 2D in to 3D 
        /// 
        /// 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 Point3D Transform(Point point) 
        { 
            Point3D transformedPoint;
 
            if (!TryTransform(point, out transformedPoint))
            {
                throw new InvalidOperationException(SR.Get(SRID.GeneralTransform_TransformFailed, null));
            } 

            return transformedPoint; 
        } 

        ///  
        /// Implementation of Freezable.CreateInstanceCore.
        /// 
        /// The new Freezable.
        protected override Freezable CreateInstanceCore() 
        {
            return new GeneralTransform2DTo3D(); 
        } 

 
        /// 
        /// Implementation of Freezable.CloneCore.
        /// 
        ///  
        protected override void CloneCore(Freezable sourceFreezable)
        { 
            GeneralTransform2DTo3D transform = (GeneralTransform2DTo3D)sourceFreezable; 
            base.CloneCore(sourceFreezable);
            CopyCommon(transform); 
        }


        ///  
        /// Implementation of Freezable.CloneCurrentValueCore.
        ///  
        ///  
        protected override void CloneCurrentValueCore(Freezable sourceFreezable)
        { 
            GeneralTransform2DTo3D transform = (GeneralTransform2DTo3D)sourceFreezable;
            base.CloneCurrentValueCore(sourceFreezable);
            CopyCommon(transform);
        } 

 
        ///  
        /// Implementation of Freezable.GetAsFrozenCore.
        ///  
        /// 
        protected override void GetAsFrozenCore(Freezable sourceFreezable)
        {
            GeneralTransform2DTo3D transform = (GeneralTransform2DTo3D)sourceFreezable; 
            base.GetAsFrozenCore(sourceFreezable);
            CopyCommon(transform); 
        } 

 
        /// 
        /// Implementation of Freezable.GetCurrentValueAsFrozenCore.
        /// 
        ///  
        protected override void GetCurrentValueAsFrozenCore(Freezable sourceFreezable)
        { 
            GeneralTransform2DTo3D transform = (GeneralTransform2DTo3D)sourceFreezable; 
            base.GetCurrentValueAsFrozenCore(sourceFreezable);
            CopyCommon(transform); 
        }

        /// 
        /// Clones values that do not have corresponding DPs 
        /// 
        ///  
        private void CopyCommon(GeneralTransform2DTo3D transform) 
        {
            _transform2D = transform._transform2D; 
            _transform3D = transform._transform3D;
            _positions = transform._positions;
            _textureCoords = transform._textureCoords;
            _triIndices = transform._triIndices; 
            _childBounds = transform._childBounds;
        } 
 
        private GeneralTransform _transform2D;
        private GeneralTransform3D _transform3D; 

        private Point3DCollection _positions;
        private PointCollection _textureCoords;
        private Int32Collection _triIndices; 

        private Rect _childBounds; 
    } 
}
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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GeneralTransform2DTo3D.cs source code in C# .NET

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