svx/source/sdr/contact/viewcontactofe3d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   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 #include <sdr/contact/viewcontactofe3d.hxx>
  21 #include <sdr/contact/viewobjectcontactofe3d.hxx>
  22 #include <svx/obj3d.hxx>
  23 #include <drawinglayer/primitive2d/embedded3dprimitive2d.hxx>
  24 #include <svx/sdr/contact/viewcontactofe3dscene.hxx>
  25 #include <svx/scene3d.hxx>
  26 #include <drawinglayer/primitive3d/transformprimitive3d.hxx>
  27 #include <drawinglayer/attribute/sdrsceneattribute3d.hxx>
  28 #include <drawinglayer/attribute/sdrlightingattribute3d.hxx>
  29 #include <drawinglayer/attribute/sdrlightattribute3d.hxx>
  30
  31 namespace {
  32
  33 const sdr::contact::ViewContactOfE3dScene* tryToFindVCOfE3DScene(
  34     const sdr::contact::ViewContact& rCandidate,
  35     basegfx::B3DHomMatrix& o_rInBetweenObjectTransform)
  36 {
  37     const sdr::contact::ViewContactOfE3dScene* pSceneParent =
  38         dynamic_cast< const sdr::contact::ViewContactOfE3dScene* >(rCandidate.GetParentContact());
  39
  40     if(pSceneParent)
  41     {
  42         // each 3d object (including in-between scenes) should have a scene as parent
  43         const sdr::contact::ViewContactOfE3dScene* pSceneParentParent =
  44             dynamic_cast< const sdr::contact::ViewContactOfE3dScene* >(pSceneParent->GetParentContact());
  45
  46         if(pSceneParentParent)
  47         {
  48             // the parent scene of rCandidate is an in-between scene, call recursively and collect
  49             // the in-between scene's object transformation part in o_rInBetweenObjectTransform
  50             const basegfx::B3DHomMatrix& rSceneParentTransform = pSceneParent->GetE3dScene().GetTransform();
  51             o_rInBetweenObjectTransform = rSceneParentTransform * o_rInBetweenObjectTransform;
  52             return tryToFindVCOfE3DScene(*pSceneParent, o_rInBetweenObjectTransform);
  53         }
  54         else
  55         {
  56             // the parent scene is the outmost scene
  57             return pSceneParent;
  58         }
  59     }
  60
  61     // object hierarchy structure is incorrect; no result
  62     return nullptr;
  63 }
  64
  65 } // end of anonymous namespace
  66
  67 namespace sdr::contact {
  68
  69 drawinglayer::primitive2d::Primitive2DContainer ViewContactOfE3d::impCreateWithGivenPrimitive3DContainer(
  70     const drawinglayer::primitive3d::Primitive3DContainer& rxContent3D) const
  71 {
  72     drawinglayer::primitive2d::Primitive2DContainer xRetval;
  73
  74     if(!rxContent3D.empty())
  75     {
  76         // try to get the outmost ViewObjectContactOfE3dScene for this single 3d object,
  77         // the ones on the way there are grouping scenes. Collect the in-between scene's
  78         // transformations to build a correct object transformation for the embedded
  79         // object
  80         basegfx::B3DHomMatrix aInBetweenObjectTransform;
  81         const ViewContactOfE3dScene* pVCOfE3DScene = tryToFindVCOfE3DScene(*this, aInBetweenObjectTransform);
  82
  83         if(pVCOfE3DScene)
  84         {
  85             basegfx::B3DVector aLightNormal;
  86             const double fShadowSlant(pVCOfE3DScene->getSdrSceneAttribute().getShadowSlant());
  87             const basegfx::B3DRange aAllContentRange = pVCOfE3DScene->getAllContentRange3D();
  88             drawinglayer::geometry::ViewInformation3D aViewInformation3D(pVCOfE3DScene->getViewInformation3D());
  89
  90             if(!pVCOfE3DScene->getSdrLightingAttribute().getLightVector().empty())
  91             {
  92                 // get light normal from first light and normalize
  93                 aLightNormal = pVCOfE3DScene->getSdrLightingAttribute().getLightVector()[0].getDirection();
  94                 aLightNormal.normalize();
  95             }
  96
  97             if(!aInBetweenObjectTransform.isIdentity())
  98             {
  99                 // if aInBetweenObjectTransform is used, create combined ViewInformation3D which
 100                 // contains the correct object transformation for the embedded 3d object
 101                 aViewInformation3D = drawinglayer::geometry::ViewInformation3D(
 102                     aViewInformation3D.getObjectTransformation() * aInBetweenObjectTransform,
 103                     aViewInformation3D.getOrientation(),
 104                     aViewInformation3D.getProjection(),
 105                     aViewInformation3D.getDeviceToView(),
 106                     aViewInformation3D.getViewTime(),
 107                     aViewInformation3D.getExtendedInformationSequence());
 108             }
 109
 110             // create embedded 2d primitive and add. LightNormal and ShadowSlant are needed for evtl.
 111             // 3D shadow extraction for correct B2DRange calculation (shadow is part of the object)
 112             const drawinglayer::primitive2d::Primitive2DReference xReference(
 113                 new drawinglayer::primitive2d::Embedded3DPrimitive2D(
 114                     rxContent3D,
 115                     pVCOfE3DScene->getObjectTransformation(),
 116                     std::move(aViewInformation3D),
 117                     aLightNormal,
 118                     fShadowSlant,
 119                     aAllContentRange));
 120
 121             xRetval = drawinglayer::primitive2d::Primitive2DContainer { xReference };
 122         }
 123     }
 124
 125     return xRetval;
 126 }
 127
 128 ViewContactOfE3d::ViewContactOfE3d(E3dObject& rSdrObject)
 129 :   ViewContactOfSdrObj(rSdrObject)
 130 {
 131 }
 132
 133 ViewContactOfE3d::~ViewContactOfE3d()
 134 {
 135 }
 136
 137 drawinglayer::primitive3d::Primitive3DContainer const & ViewContactOfE3d::getVIP3DSWithoutObjectTransform() const
 138 {
 139     // local up-to-date checks. Create new list and compare.
 140     drawinglayer::primitive3d::Primitive3DContainer xNew(createViewIndependentPrimitive3DContainer());
 141
 142     if(mxViewIndependentPrimitive3DContainer != xNew)
 143     {
 144         // has changed, copy content
 145         const_cast< ViewContactOfE3d* >(this)->mxViewIndependentPrimitive3DContainer = std::move(xNew);
 146     }
 147
 148     // return current Primitive2DContainer
 149     return mxViewIndependentPrimitive3DContainer;
 150 }
 151
 152 drawinglayer::primitive3d::Primitive3DContainer ViewContactOfE3d::getViewIndependentPrimitive3DContainer() const
 153 {
 154     // get sequence without object transform
 155     drawinglayer::primitive3d::Primitive3DContainer xRetval(getVIP3DSWithoutObjectTransform());
 156
 157     if(!xRetval.empty())
 158     {
 159         // add object transform if it's used
 160         const basegfx::B3DHomMatrix& rObjectTransform(GetE3dObject().GetTransform());
 161
 162         if(!rObjectTransform.isIdentity())
 163         {
 164             const drawinglayer::primitive3d::Primitive3DReference xReference(
 165                 new drawinglayer::primitive3d::TransformPrimitive3D(
 166                     rObjectTransform,
 167                     xRetval));
 168
 169             xRetval = { xReference };
 170         }
 171     }
 172
 173     // return current Primitive2DContainer
 174     return xRetval;
 175 }
 176
 177 void ViewContactOfE3d::createViewIndependentPrimitive2DSequence(drawinglayer::primitive2d::Primitive2DDecompositionVisitor& rVisitor) const
 178 {
 179     // also need to create a 2D embedding when the view-independent part is requested,
 180     // see view-dependent part in ViewObjectContactOfE3d::createPrimitive2DSequence
 181     // get 3d primitive vector, isPrimitiveVisible() is done in 3d creator
 182     return rVisitor.visit(impCreateWithGivenPrimitive3DContainer(getViewIndependentPrimitive3DContainer()));
 183 }
 184
 185 ViewObjectContact& ViewContactOfE3d::CreateObjectSpecificViewObjectContact(ObjectContact& rObjectContact)
 186 {
 187     ViewObjectContact* pRetval = new ViewObjectContactOfE3d(rObjectContact, *this);
 188     DBG_ASSERT(pRetval, "ViewContactOfE3d::CreateObjectSpecificViewObjectContact() failed (!)");
 189
 190     return *pRetval;
 191 }
 192
 193 }
 194
 195 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */