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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : #include <helperminimaldepth3d.hxx>
22 : #include <drawinglayer/processor3d/baseprocessor3d.hxx>
23 : #include <drawinglayer/primitive3d/drawinglayer_primitivetypes3d.hxx>
24 : #include <drawinglayer/primitive3d/transformprimitive3d.hxx>
25 : #include <drawinglayer/primitive3d/polygonprimitive3d.hxx>
26 : #include <drawinglayer/primitive3d/polypolygonprimitive3d.hxx>
27 : #include <svx/sdr/contact/viewcontactofe3d.hxx>
28 : #include <svx/sdr/contact/viewcontactofe3dscene.hxx>
29 : #include <svx/obj3d.hxx>
30 : #include <svx/scene3d.hxx>
31 :
32 : //////////////////////////////////////////////////////////////////////////////
33 :
34 : namespace drawinglayer
35 : {
36 : namespace processor3d
37 : {
38 0 : class MinimalDephInViewExtractor : public BaseProcessor3D
39 : {
40 : private:
41 : // the value which will be fetched as result
42 : double mfMinimalDepth;
43 :
44 : // as tooling, the process() implementation takes over API handling and calls this
45 : // virtual render method when the primitive implementation is BasePrimitive3D-based.
46 : virtual void processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate);
47 :
48 : public:
49 0 : MinimalDephInViewExtractor(const geometry::ViewInformation3D& rViewInformation)
50 : : BaseProcessor3D(rViewInformation),
51 0 : mfMinimalDepth(DBL_MAX)
52 0 : {}
53 :
54 : // data access
55 0 : double getMinimalDepth() const { return mfMinimalDepth; }
56 : };
57 :
58 0 : void MinimalDephInViewExtractor::processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate)
59 : {
60 : // it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
61 0 : switch(rCandidate.getPrimitive3DID())
62 : {
63 : case PRIMITIVE3D_ID_TRANSFORMPRIMITIVE3D :
64 : {
65 : // transform group. Remember current transformations
66 0 : const primitive3d::TransformPrimitive3D& rPrimitive = static_cast< const primitive3d::TransformPrimitive3D& >(rCandidate);
67 0 : const geometry::ViewInformation3D aLastViewInformation3D(getViewInformation3D());
68 :
69 : // create new transformation; add new object transform from right side
70 : const geometry::ViewInformation3D aNewViewInformation3D(
71 0 : aLastViewInformation3D.getObjectTransformation() * rPrimitive.getTransformation(),
72 0 : aLastViewInformation3D.getOrientation(),
73 0 : aLastViewInformation3D.getProjection(),
74 0 : aLastViewInformation3D.getDeviceToView(),
75 : aLastViewInformation3D.getViewTime(),
76 0 : aLastViewInformation3D.getExtendedInformationSequence());
77 0 : updateViewInformation(aNewViewInformation3D);
78 :
79 : // let break down
80 0 : process(rPrimitive.getChildren());
81 :
82 : // restore transformations
83 0 : updateViewInformation(aLastViewInformation3D);
84 0 : break;
85 : }
86 : case PRIMITIVE3D_ID_POLYGONHAIRLINEPRIMITIVE3D :
87 : {
88 : // PolygonHairlinePrimitive3D
89 0 : const primitive3d::PolygonHairlinePrimitive3D& rPrimitive = static_cast< const primitive3d::PolygonHairlinePrimitive3D& >(rCandidate);
90 0 : const basegfx::B3DPolygon& rPolygon = rPrimitive.getB3DPolygon();
91 0 : const sal_uInt32 nCount(rPolygon.count());
92 :
93 0 : for(sal_uInt32 a(0); a < nCount; a++)
94 : {
95 0 : const basegfx::B3DPoint aPointInView(getViewInformation3D().getObjectToView() * rPolygon.getB3DPoint(a));
96 :
97 0 : if(aPointInView.getZ() < mfMinimalDepth)
98 : {
99 0 : mfMinimalDepth = aPointInView.getZ();
100 : }
101 0 : }
102 :
103 0 : break;
104 : }
105 : case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
106 : {
107 : // PolyPolygonMaterialPrimitive3D
108 0 : const primitive3d::PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const primitive3d::PolyPolygonMaterialPrimitive3D& >(rCandidate);
109 0 : const basegfx::B3DPolyPolygon& rPolyPolygon = rPrimitive.getB3DPolyPolygon();
110 0 : const sal_uInt32 nPolyCount(rPolyPolygon.count());
111 :
112 0 : for(sal_uInt32 a(0); a < nPolyCount; a++)
113 : {
114 0 : const basegfx::B3DPolygon aPolygon(rPolyPolygon.getB3DPolygon(a));
115 0 : const sal_uInt32 nCount(aPolygon.count());
116 :
117 0 : for(sal_uInt32 b(0); b < nCount; b++)
118 : {
119 0 : const basegfx::B3DPoint aPointInView(getViewInformation3D().getObjectToView() * aPolygon.getB3DPoint(b));
120 :
121 0 : if(aPointInView.getZ() < mfMinimalDepth)
122 : {
123 0 : mfMinimalDepth = aPointInView.getZ();
124 : }
125 0 : }
126 0 : }
127 :
128 0 : break;
129 : }
130 : default :
131 : {
132 : // process recursively
133 0 : process(rCandidate.get3DDecomposition(getViewInformation3D()));
134 0 : break;
135 : }
136 : }
137 0 : }
138 : } // end of namespace processor3d
139 : } // end of namespace drawinglayer
140 :
141 : //////////////////////////////////////////////////////////////////////////////
142 : // changed to create values using VCs, Primitive3DSequence and ViewInformation3D to allow
143 : // removal of old 3D bucket geometry. There is one slight difference in the result, it's
144 : // in [0.0 .. 1.0] for Z-Depth since the scaling of the scene as 2D object is no longer
145 : // part of the 3D transformations. This could be added since the ViewContactOfE3dScene is
146 : // given, but is not needed since the permutation of the depth values needs only be correct
147 : // relative to each other
148 :
149 0 : double getMinimalDepthInViewCoordinates(const E3dCompoundObject& rObject)
150 : {
151 : // this is a E3dCompoundObject, so it cannot be a scene (which is a E3dObject).
152 : // Get primitive sequence using VC
153 0 : const sdr::contact::ViewContactOfE3d& rVCObject = static_cast< sdr::contact::ViewContactOfE3d& >(rObject.GetViewContact());
154 0 : const drawinglayer::primitive3d::Primitive3DSequence aPrimitives = rVCObject.getViewIndependentPrimitive3DSequence();
155 0 : double fRetval(DBL_MAX);
156 :
157 0 : if(aPrimitives.hasElements())
158 : {
159 0 : const E3dScene* pScene = rObject.GetScene();
160 :
161 0 : if(pScene)
162 : {
163 : // get ViewInformation3D from scene using VC
164 0 : const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(pScene->GetViewContact());
165 0 : const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());
166 :
167 : // the scene's object transformation is already part of aViewInfo3D.getObjectTransformation()
168 : // for historical reasons (see ViewContactOfE3dScene::createViewInformation3D for more info)
169 : // and the object's transform is part of aPrimitives (and taken into account when decomposing
170 : // to PolygonHairlinePrimitive3D and PolyPolygonMaterialPrimitive3D). The missing part may be
171 : // some Scene SdrObjects lying in-between which may need to be added. This is e.g. used in chart,
172 : // and generally allowed in 3d scenes an their 3d object hierarchy
173 0 : basegfx::B3DHomMatrix aInBetweenSceneMatrix;
174 0 : E3dScene* pParentScene = dynamic_cast< E3dScene* >(rObject.GetParentObj());
175 :
176 0 : while(pParentScene && pParentScene != pScene)
177 : {
178 0 : aInBetweenSceneMatrix = pParentScene->GetTransform() * aInBetweenSceneMatrix;
179 0 : pParentScene = dynamic_cast< E3dScene* >(pParentScene->GetParentObj());
180 : }
181 :
182 : // build new ViewInformation containing all transforms
183 : const drawinglayer::geometry::ViewInformation3D aNewViewInformation3D(
184 0 : aViewInfo3D.getObjectTransformation() * aInBetweenSceneMatrix,
185 0 : aViewInfo3D.getOrientation(),
186 0 : aViewInfo3D.getProjection(),
187 0 : aViewInfo3D.getDeviceToView(),
188 : aViewInfo3D.getViewTime(),
189 0 : aViewInfo3D.getExtendedInformationSequence());
190 :
191 : // create extractor helper, proccess geometry and get return value
192 0 : drawinglayer::processor3d::MinimalDephInViewExtractor aExtractor(aNewViewInformation3D);
193 0 : aExtractor.process(aPrimitives);
194 0 : fRetval = aExtractor.getMinimalDepth();
195 : }
196 : }
197 :
198 0 : return fRetval;
199 : }
200 :
201 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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