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21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_svx.hxx"
26 
27 #include <helperminimaldepth3d.hxx>
28 #include <drawinglayer/processor3d/baseprocessor3d.hxx>
29 #include <drawinglayer/primitive3d/drawinglayer_primitivetypes3d.hxx>
30 #include <drawinglayer/primitive3d/transformprimitive3d.hxx>
31 #include <drawinglayer/primitive3d/polygonprimitive3d.hxx>
32 #include <drawinglayer/primitive3d/polypolygonprimitive3d.hxx>
33 #include <svx/sdr/contact/viewcontactofe3d.hxx>
34 #include <svx/sdr/contact/viewcontactofe3dscene.hxx>
35 #include <svx/obj3d.hxx>
36 #include <svx/scene3d.hxx>
37 
38 //////////////////////////////////////////////////////////////////////////////
39 
40 namespace drawinglayer
41 {
42 	namespace processor3d
43 	{
44 		class MinimalDephInViewExtractor : public BaseProcessor3D
45 		{
46 		private:
47             // the value which will be fetched as result
48             double                                  mfMinimalDepth;
49 
50 			// as tooling, the process() implementation takes over API handling and calls this
51 			// virtual render method when the primitive implementation is BasePrimitive3D-based.
52 			virtual void processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate);
53 
54 		public:
MinimalDephInViewExtractor(const geometry::ViewInformation3D & rViewInformation)55 			MinimalDephInViewExtractor(const geometry::ViewInformation3D& rViewInformation)
56             :   BaseProcessor3D(rViewInformation),
57                 mfMinimalDepth(DBL_MAX)
58             {}
59 
60 			// data access
getMinimalDepth() const61             double getMinimalDepth() const { return mfMinimalDepth; }
62 		};
63 
processBasePrimitive3D(const primitive3d::BasePrimitive3D & rCandidate)64         void MinimalDephInViewExtractor::processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate)
65         {
66 			// it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
67 			switch(rCandidate.getPrimitive3DID())
68 			{
69 				case PRIMITIVE3D_ID_TRANSFORMPRIMITIVE3D :
70 				{
71 					// transform group. Remember current transformations
72 					const primitive3d::TransformPrimitive3D& rPrimitive = static_cast< const primitive3d::TransformPrimitive3D& >(rCandidate);
73 					const geometry::ViewInformation3D aLastViewInformation3D(getViewInformation3D());
74 
75 					// create new transformation; add new object transform from right side
76 					const geometry::ViewInformation3D aNewViewInformation3D(
77 						aLastViewInformation3D.getObjectTransformation() * rPrimitive.getTransformation(),
78 						aLastViewInformation3D.getOrientation(),
79 						aLastViewInformation3D.getProjection(),
80 						aLastViewInformation3D.getDeviceToView(),
81 						aLastViewInformation3D.getViewTime(),
82 						aLastViewInformation3D.getExtendedInformationSequence());
83 					updateViewInformation(aNewViewInformation3D);
84 
85 					// let break down
86 					process(rPrimitive.getChildren());
87 
88 					// restore transformations
89 					updateViewInformation(aLastViewInformation3D);
90 					break;
91 				}
92 				case PRIMITIVE3D_ID_POLYGONHAIRLINEPRIMITIVE3D :
93 				{
94 					// PolygonHairlinePrimitive3D
95 					const primitive3d::PolygonHairlinePrimitive3D& rPrimitive = static_cast< const primitive3d::PolygonHairlinePrimitive3D& >(rCandidate);
96            			const basegfx::B3DPolygon& rPolygon = rPrimitive.getB3DPolygon();
97                     const sal_uInt32 nCount(rPolygon.count());
98 
99                     for(sal_uInt32 a(0); a < nCount; a++)
100                     {
101                         const basegfx::B3DPoint aPointInView(getViewInformation3D().getObjectToView() * rPolygon.getB3DPoint(a));
102 
103                         if(aPointInView.getZ() < mfMinimalDepth)
104                         {
105                             mfMinimalDepth = aPointInView.getZ();
106                         }
107                     }
108 
109                     break;
110 				}
111 				case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
112 				{
113 					// PolyPolygonMaterialPrimitive3D
114 					const primitive3d::PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const primitive3d::PolyPolygonMaterialPrimitive3D& >(rCandidate);
115            			const basegfx::B3DPolyPolygon& rPolyPolygon = rPrimitive.getB3DPolyPolygon();
116                     const sal_uInt32 nPolyCount(rPolyPolygon.count());
117 
118                     for(sal_uInt32 a(0); a < nPolyCount; a++)
119                     {
120            			    const basegfx::B3DPolygon aPolygon(rPolyPolygon.getB3DPolygon(a));
121                         const sal_uInt32 nCount(aPolygon.count());
122 
123                         for(sal_uInt32 b(0); b < nCount; b++)
124                         {
125                             const basegfx::B3DPoint aPointInView(getViewInformation3D().getObjectToView() * aPolygon.getB3DPoint(b));
126 
127                             if(aPointInView.getZ() < mfMinimalDepth)
128                             {
129                                 mfMinimalDepth = aPointInView.getZ();
130                             }
131                         }
132                     }
133 
134                     break;
135 				}
136 				default :
137 				{
138 					// process recursively
139 					process(rCandidate.get3DDecomposition(getViewInformation3D()));
140 					break;
141 				}
142             }
143         }
144 	} // end of namespace processor3d
145 } // end of namespace drawinglayer
146 
147 //////////////////////////////////////////////////////////////////////////////
148 // changed to create values using VCs, Primitive3DSequence and ViewInformation3D to allow
149 // removal of old 3D bucket geometry. There is one slight difference in the result, it's
150 // in [0.0 .. 1.0] for Z-Depth since the scaling of the scene as 2D object is no longer
151 // part of the 3D transformations. This could be added since the ViewContactOfE3dScene is
152 // given, but is not needed since the permutation of the depth values needs only be correct
153 // relative to each other
154 
getMinimalDepthInViewCoordinates(const E3dCompoundObject & rObject)155 double getMinimalDepthInViewCoordinates(const E3dCompoundObject& rObject)
156 {
157     // this is a E3dCompoundObject, so it cannot be a scene (which is a E3dObject).
158     // Get primitive sequence using VC
159     const sdr::contact::ViewContactOfE3d& rVCObject = static_cast< sdr::contact::ViewContactOfE3d& >(rObject.GetViewContact());
160 	const drawinglayer::primitive3d::Primitive3DSequence aPrimitives = rVCObject.getViewIndependentPrimitive3DSequence();
161     double fRetval(DBL_MAX);
162 
163     if(aPrimitives.hasElements())
164     {
165         const E3dScene* pScene = rObject.GetScene();
166 
167         if(pScene)
168         {
169             // get ViewInformation3D from scene using VC
170             const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(pScene->GetViewContact());
171 	        const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());
172 
173             // the scene's object transformation is already part of aViewInfo3D.getObjectTransformation()
174             // for historical reasons (see ViewContactOfE3dScene::createViewInformation3D for more info)
175             // and the object's transform is part of aPrimitives (and taken into account when decomposing
176             // to PolygonHairlinePrimitive3D and PolyPolygonMaterialPrimitive3D). The missing part may be
177             // some Scene SdrObjects lying in-between which may need to be added. This is e.g. used in chart,
178             // and generally allowed in 3d scenes an their 3d object hierarchy
179             basegfx::B3DHomMatrix aInBetweenSceneMatrix;
180             E3dScene* pParentScene = dynamic_cast< E3dScene* >(rObject.GetParentObj());
181 
182             while(pParentScene && pParentScene != pScene)
183             {
184                 aInBetweenSceneMatrix = pParentScene->GetTransform() * aInBetweenSceneMatrix;
185                 pParentScene = dynamic_cast< E3dScene* >(pParentScene->GetParentObj());
186             }
187 
188             // build new ViewInformation containing all transforms
189             const drawinglayer::geometry::ViewInformation3D aNewViewInformation3D(
190                 aViewInfo3D.getObjectTransformation() * aInBetweenSceneMatrix,
191                 aViewInfo3D.getOrientation(),
192                 aViewInfo3D.getProjection(),
193                 aViewInfo3D.getDeviceToView(),
194                 aViewInfo3D.getViewTime(),
195                 aViewInfo3D.getExtendedInformationSequence());
196 
197             // create extractor helper, proccess geometry and get return value
198             drawinglayer::processor3d::MinimalDephInViewExtractor aExtractor(aNewViewInformation3D);
199             aExtractor.process(aPrimitives);
200             fRetval = aExtractor.getMinimalDepth();
201         }
202     }
203 
204 	return fRetval;
205 }
206 
207 //////////////////////////////////////////////////////////////////////////////
208 // eof
209