Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 893 insertions, 0 deletions

diff --git a/slideshow/source/engine/box2dtools.cxx b/slideshow/source/engine/box2dtools.cxx
new file mode 100644
index 000000000..c6009afa6
--- /dev/null
+++ b/slideshow/source/engine/box2dtools.cxx
@@ -0,0 +1,893 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <box2dtools.hxx>
+#include <config_box2d.h>
+#include BOX2D_HEADER
+
+#include <shapemanager.hxx>
+#include <attributableshape.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/polygon/b2dpolygontriangulator.hxx>
+
+#include <svx/svdobj.hxx>
+#include <svx/svdoashp.hxx>
+#include <svx/svdpage.hxx>
+
+#include <svx/unoapi.hxx>
+
+#define BOX2D_SLIDE_SIZE_IN_METERS 100.00f
+constexpr double fDefaultStaticBodyBounciness(0.1);
+
+namespace box2d::utils
+{
+namespace
+{
+double calculateScaleFactor(const ::basegfx::B2DVector& rSlideSize)
+{
+    double fWidth = rSlideSize.getX();
+    double fHeight = rSlideSize.getY();
+
+    // Scale factor is based on whatever is the larger
+    // value between slide width and height
+    if (fWidth > fHeight)
+        return BOX2D_SLIDE_SIZE_IN_METERS / fWidth;
+    else
+        return BOX2D_SLIDE_SIZE_IN_METERS / fHeight;
+}
+
+b2BodyType getBox2DInternalBodyType(const box2DBodyType eType)
+{
+    switch (eType)
+    {
+        default:
+        case BOX2D_STATIC_BODY:
+            return b2_staticBody;
+        case BOX2D_KINEMATIC_BODY:
+            return b2_kinematicBody;
+        case BOX2D_DYNAMIC_BODY:
+            return b2_dynamicBody;
+    }
+}
+
+box2DBodyType getBox2DLOBodyType(const b2BodyType eType)
+{
+    switch (eType)
+    {
+        default:
+        case b2_staticBody:
+            return BOX2D_STATIC_BODY;
+        case b2_kinematicBody:
+            return BOX2D_KINEMATIC_BODY;
+        case b2_dynamicBody:
+            return BOX2D_DYNAMIC_BODY;
+    }
+}
+
+b2Vec2 convertB2DPointToBox2DVec2(const basegfx::B2DPoint& aPoint, const double fScaleFactor)
+{
+    return { static_cast<float>(aPoint.getX() * fScaleFactor),
+             static_cast<float>(aPoint.getY() * -fScaleFactor) };
+}
+
+// expects rTriangleVector to have coordinates relative to the shape's bounding box center
+void addTriangleVectorToBody(const basegfx::triangulator::B2DTriangleVector& rTriangleVector,
+                             b2Body* aBody, const float fDensity, const float fFriction,
+                             const float fRestitution, const double fScaleFactor)
+{
+    for (const basegfx::triangulator::B2DTriangle& aTriangle : rTriangleVector)
+    {
+        b2FixtureDef aFixture;
+        b2PolygonShape aPolygonShape;
+        b2Vec2 aTriangleVertices[3]
+            = { convertB2DPointToBox2DVec2(aTriangle.getA(), fScaleFactor),
+                convertB2DPointToBox2DVec2(aTriangle.getB(), fScaleFactor),
+                convertB2DPointToBox2DVec2(aTriangle.getC(), fScaleFactor) };
+
+        bool bValidPointDistance = true;
+
+        // check whether the triangle has degenerately close points
+        for (int nPointIndexA = 0; nPointIndexA < 3; nPointIndexA++)
+        {
+            for (int nPointIndexB = 0; nPointIndexB < 3; nPointIndexB++)
+            {
+                if (nPointIndexA == nPointIndexB)
+                    continue;
+
+                if (b2DistanceSquared(aTriangleVertices[nPointIndexA],
+                                      aTriangleVertices[nPointIndexB])
+                    < 0.003f)
+                {
+                    bValidPointDistance = false;
+                }
+            }
+        }
+
+        if (bValidPointDistance)
+        {
+            // create a fixture that represents the triangle
+            aPolygonShape.Set(aTriangleVertices, 3);
+            aFixture.shape = &aPolygonShape;
+            aFixture.density = fDensity;
+            aFixture.friction = fFriction;
+            aFixture.restitution = fRestitution;
+            aBody->CreateFixture(&aFixture);
+        }
+    }
+}
+
+// expects rPolygon to have coordinates relative to it's center
+void addEdgeShapeToBody(const basegfx::B2DPolygon& rPolygon, b2Body* aBody, const float fDensity,
+                        const float fFriction, const float fRestitution, const double fScaleFactor)
+{
+    // make sure there's no bezier curves on the polygon
+    assert(!rPolygon.areControlPointsUsed());
+    basegfx::B2DPolygon aPolygon = basegfx::utils::removeNeutralPoints(rPolygon);
+
+    // value that somewhat defines half width of the quadrilateral
+    // that will be representing edge segment in the box2d world
+    const float fHalfWidth = 0.1f;
+    bool bHasPreviousQuadrilateralEdge = false;
+    b2Vec2 aQuadrilateralVertices[4];
+
+    for (sal_uInt32 nIndex = 0; nIndex < aPolygon.count(); nIndex++)
+    {
+        b2FixtureDef aFixture;
+        b2PolygonShape aPolygonShape;
+
+        basegfx::B2DPoint aPointA;
+        basegfx::B2DPoint aPointB;
+        if (nIndex != 0)
+        {
+            // get two adjacent points to create an edge out of
+            aPointA = aPolygon.getB2DPoint(nIndex - 1);
+            aPointB = aPolygon.getB2DPoint(nIndex);
+        }
+        else if (aPolygon.isClosed())
+        {
+            // start by connecting the last point to the first one
+            aPointA = aPolygon.getB2DPoint(aPolygon.count() - 1);
+            aPointB = aPolygon.getB2DPoint(nIndex);
+        }
+        else // the polygon isn't closed, won't connect last and first points
+        {
+            continue;
+        }
+
+        // create a vector that represents the direction of the edge
+        // and make it a unit vector
+        b2Vec2 aEdgeUnitVec(convertB2DPointToBox2DVec2(aPointB, fScaleFactor)
+                            - convertB2DPointToBox2DVec2(aPointA, fScaleFactor));
+        aEdgeUnitVec.Normalize();
+
+        // create a unit vector that represents Normal of the edge
+        b2Vec2 aEdgeNormal(-aEdgeUnitVec.y, aEdgeUnitVec.x);
+
+        // if there was an edge previously created it should just connect
+        // using it's ending points so that there are no empty spots
+        // between edge segments, if not use wherever aPointA is at
+        if (!bHasPreviousQuadrilateralEdge)
+        {
+            // the point is translated along the edge normal both directions by
+            // fHalfWidth to create a quadrilateral edge
+            aQuadrilateralVertices[0]
+                = convertB2DPointToBox2DVec2(aPointA, fScaleFactor) + fHalfWidth * aEdgeNormal;
+            aQuadrilateralVertices[1]
+                = convertB2DPointToBox2DVec2(aPointA, fScaleFactor) + -fHalfWidth * aEdgeNormal;
+            bHasPreviousQuadrilateralEdge = true;
+        }
+        aQuadrilateralVertices[2]
+            = convertB2DPointToBox2DVec2(aPointB, fScaleFactor) + fHalfWidth * aEdgeNormal;
+        aQuadrilateralVertices[3]
+            = convertB2DPointToBox2DVec2(aPointB, fScaleFactor) + -fHalfWidth * aEdgeNormal;
+
+        // check whether the edge would have degenerately close points
+        bool bValidPointDistance
+            = b2DistanceSquared(aQuadrilateralVertices[0], aQuadrilateralVertices[2]) > 0.003f;
+
+        if (bValidPointDistance)
+        {
+            // create a quadrilateral shaped fixture to represent the edge
+            aPolygonShape.Set(aQuadrilateralVertices, 4);
+            aFixture.shape = &aPolygonShape;
+            aFixture.density = fDensity;
+            aFixture.friction = fFriction;
+            aFixture.restitution = fRestitution;
+            aBody->CreateFixture(&aFixture);
+
+            // prepare the quadrilateral edge for next connection
+            aQuadrilateralVertices[0] = aQuadrilateralVertices[2];
+            aQuadrilateralVertices[1] = aQuadrilateralVertices[3];
+        }
+    }
+}
+
+void addEdgeShapeToBody(const basegfx::B2DPolyPolygon& rPolyPolygon, b2Body* aBody,
+                        const float fDensity, const float fFriction, const float fRestitution,
+                        const double fScaleFactor)
+{
+    for (const basegfx::B2DPolygon& rPolygon : rPolyPolygon)
+    {
+        addEdgeShapeToBody(rPolygon, aBody, fDensity, fFriction, fRestitution, fScaleFactor);
+    }
+}
+}
+
+box2DWorld::box2DWorld(const ::basegfx::B2DVector& rSlideSize)
+    : mpBox2DWorld()
+    , mfScaleFactor(calculateScaleFactor(rSlideSize))
+    , mbShapesInitialized(false)
+    , mbHasWorldStepper(false)
+    , mbAlreadyStepped(false)
+    , mnPhysicsAnimationCounter(0)
+    , mpXShapeToBodyMap()
+    , maShapeParallelUpdateQueue()
+{
+}
+
+box2DWorld::~box2DWorld() = default;
+
+bool box2DWorld::initiateWorld(const ::basegfx::B2DVector& rSlideSize)
+{
+    if (!mpBox2DWorld)
+    {
+        mpBox2DWorld = std::make_unique<b2World>(b2Vec2(0.0f, -30.0f));
+        createStaticFrameAroundSlide(rSlideSize);
+        return false;
+    }
+    else
+    {
+        return true;
+    }
+}
+
+void box2DWorld::createStaticFrameAroundSlide(const ::basegfx::B2DVector& rSlideSize)
+{
+    assert(mpBox2DWorld);
+
+    float fWidth = static_cast<float>(rSlideSize.getX() * mfScaleFactor);
+    float fHeight = static_cast<float>(rSlideSize.getY() * mfScaleFactor);
+
+    // static body for creating the frame around the slide
+    b2BodyDef aBodyDef;
+    aBodyDef.type = b2_staticBody;
+    aBodyDef.position.Set(0, 0);
+
+    // not going to be stored anywhere, will live
+    // as long as the Box2DWorld does
+    b2Body* pStaticBody = mpBox2DWorld->CreateBody(&aBodyDef);
+
+    // create an edge loop that represents slide frame
+    b2Vec2 aEdgePoints[4];
+    aEdgePoints[0].Set(0, 0);
+    aEdgePoints[1].Set(0, -fHeight);
+    aEdgePoints[2].Set(fWidth, -fHeight);
+    aEdgePoints[3].Set(fWidth, 0);
+
+    b2ChainShape aEdgesChainShape;
+    aEdgesChainShape.CreateLoop(aEdgePoints, 4);
+
+    // create the fixture for the shape
+    b2FixtureDef aFixtureDef;
+    aFixtureDef.shape = &aEdgesChainShape;
+    pStaticBody->CreateFixture(&aFixtureDef);
+}
+
+void box2DWorld::setShapePosition(const css::uno::Reference<com::sun::star::drawing::XShape> xShape,
+                                  const basegfx::B2DPoint& rOutPos)
+{
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+    pBox2DBody->setPosition(rOutPos);
+}
+
+void box2DWorld::setShapePositionByLinearVelocity(
+    const css::uno::Reference<com::sun::star::drawing::XShape> xShape,
+    const basegfx::B2DPoint& rOutPos, const double fPassedTime)
+{
+    assert(mpBox2DWorld);
+    if (fPassedTime > 0) // this only makes sense if there was an advance in time
+    {
+        Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+        pBox2DBody->setPositionByLinearVelocity(rOutPos, fPassedTime);
+    }
+}
+
+void box2DWorld::setShapeLinearVelocity(
+    const css::uno::Reference<com::sun::star::drawing::XShape> xShape,
+    const basegfx::B2DVector& rVelocity)
+{
+    assert(mpBox2DWorld);
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+    pBox2DBody->setLinearVelocity(rVelocity);
+}
+
+void box2DWorld::setShapeAngle(const css::uno::Reference<com::sun::star::drawing::XShape> xShape,
+                               const double fAngle)
+{
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+    pBox2DBody->setAngle(fAngle);
+}
+
+void box2DWorld::setShapeAngleByAngularVelocity(
+    const css::uno::Reference<com::sun::star::drawing::XShape> xShape, const double fAngle,
+    const double fPassedTime)
+{
+    assert(mpBox2DWorld);
+    if (fPassedTime > 0) // this only makes sense if there was an advance in time
+    {
+        Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+        pBox2DBody->setAngleByAngularVelocity(fAngle, fPassedTime);
+    }
+}
+
+void box2DWorld::setShapeAngularVelocity(
+    const css::uno::Reference<com::sun::star::drawing::XShape> xShape,
+    const double fAngularVelocity)
+{
+    assert(mpBox2DWorld);
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+    pBox2DBody->setAngularVelocity(fAngularVelocity);
+}
+
+void box2DWorld::setShapeCollision(
+    const css::uno::Reference<com::sun::star::drawing::XShape> xShape, bool bCanCollide)
+{
+    assert(mpBox2DWorld);
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+    pBox2DBody->setCollision(bCanCollide);
+}
+
+void box2DWorld::processUpdateQueue(const double fPassedTime)
+{
+    while (!maShapeParallelUpdateQueue.empty())
+    {
+        Box2DDynamicUpdateInformation& aQueueElement = maShapeParallelUpdateQueue.front();
+
+        if (aQueueElement.mnDelayForSteps > 0)
+        {
+            // it was queued as a delayed action, skip it, don't pop
+            aQueueElement.mnDelayForSteps--;
+        }
+        else
+        {
+            switch (aQueueElement.meUpdateType)
+            {
+                default:
+                case BOX2D_UPDATE_POSITION_CHANGE:
+                    setShapePositionByLinearVelocity(aQueueElement.mxShape,
+                                                     aQueueElement.maPosition, fPassedTime);
+                    break;
+                case BOX2D_UPDATE_POSITION:
+                    setShapePosition(aQueueElement.mxShape, aQueueElement.maPosition);
+                    break;
+                case BOX2D_UPDATE_ANGLE:
+                    setShapeAngleByAngularVelocity(aQueueElement.mxShape, aQueueElement.mfAngle,
+                                                   fPassedTime);
+                    break;
+                case BOX2D_UPDATE_SIZE:
+                    break;
+                case BOX2D_UPDATE_VISIBILITY:
+                    setShapeCollision(aQueueElement.mxShape, aQueueElement.mbVisibility);
+                    break;
+                case BOX2D_UPDATE_LINEAR_VELOCITY:
+                    setShapeLinearVelocity(aQueueElement.mxShape, aQueueElement.maVelocity);
+                    break;
+                case BOX2D_UPDATE_ANGULAR_VELOCITY:
+                    setShapeAngularVelocity(aQueueElement.mxShape, aQueueElement.mfAngularVelocity);
+            }
+            maShapeParallelUpdateQueue.pop();
+        }
+    }
+}
+
+void box2DWorld::initiateAllShapesAsStaticBodies(
+    const slideshow::internal::ShapeManagerSharedPtr& pShapeManager)
+{
+    assert(mpBox2DWorld);
+
+    mbShapesInitialized = true;
+    auto aXShapeToShapeMap = pShapeManager->getXShapeToShapeMap();
+
+    std::unordered_map<css::uno::Reference<css::drawing::XShape>, bool> aXShapeBelongsToAGroup;
+
+    // iterate over the shapes in the current slide and flag them if they belong to a group
+    // will flag the only ones that are belong to a group since std::unordered_map operator[]
+    // defaults the value to false if the key doesn't have a corresponding value
+    for (auto aIt = aXShapeToShapeMap.begin(); aIt != aXShapeToShapeMap.end(); aIt++)
+    {
+        slideshow::internal::ShapeSharedPtr pShape = aIt->second;
+        if (pShape->isForeground())
+        {
+            SdrObject* pTemp = SdrObject::getSdrObjectFromXShape(pShape->getXShape());
+            if (pTemp && pTemp->IsGroupObject())
+            {
+                // if it is a group object iterate over its children and flag them
+                SdrObjList* aObjList = pTemp->GetSubList();
+                const size_t nObjCount(aObjList->GetObjCount());
+
+                for (size_t nObjIndex = 0; nObjIndex < nObjCount; ++nObjIndex)
+                {
+                    SdrObject* pGroupMember(aObjList->GetObj(nObjIndex));
+                    aXShapeBelongsToAGroup.insert(
+                        std::make_pair(GetXShapeForSdrObject(pGroupMember), true));
+                }
+            }
+        }
+    }
+
+    // iterate over shapes in the current slide
+    for (auto aIt = aXShapeToShapeMap.begin(); aIt != aXShapeToShapeMap.end(); aIt++)
+    {
+        slideshow::internal::ShapeSharedPtr pShape = aIt->second;
+        // only create static bodies for the shapes that do not belong to a group
+        // groups themselves will have one body that represents the whole shape
+        // collection
+        if (pShape->isForeground() && !aXShapeBelongsToAGroup[pShape->getXShape()])
+        {
+            Box2DBodySharedPtr pBox2DBody = createStaticBody(pShape);
+
+            mpXShapeToBodyMap.insert(std::make_pair(pShape->getXShape(), pBox2DBody));
+            if (!pShape->isVisible())
+            {
+                // if the shape isn't visible, queue an update for it
+                queueShapeVisibilityUpdate(pShape->getXShape(), false);
+            }
+        }
+    }
+}
+
+bool box2DWorld::hasWorldStepper() const { return mbHasWorldStepper; }
+
+void box2DWorld::setHasWorldStepper(const bool bHasWorldStepper)
+{
+    mbHasWorldStepper = bHasWorldStepper;
+}
+
+void box2DWorld::queueDynamicPositionUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape,
+    const basegfx::B2DPoint& rOutPos)
+{
+    Box2DDynamicUpdateInformation aQueueElement = { xShape, {}, BOX2D_UPDATE_POSITION_CHANGE };
+    aQueueElement.maPosition = rOutPos;
+    maShapeParallelUpdateQueue.push(aQueueElement);
+}
+
+void box2DWorld::queueLinearVelocityUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape,
+    const basegfx::B2DVector& rVelocity, const int nDelayForSteps)
+{
+    Box2DDynamicUpdateInformation aQueueElement
+        = { xShape, {}, BOX2D_UPDATE_LINEAR_VELOCITY, nDelayForSteps };
+    aQueueElement.maVelocity = rVelocity;
+    maShapeParallelUpdateQueue.push(aQueueElement);
+}
+
+void box2DWorld::queueDynamicRotationUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape, const double fAngle)
+{
+    Box2DDynamicUpdateInformation aQueueElement = { xShape, {}, BOX2D_UPDATE_ANGLE };
+    aQueueElement.mfAngle = fAngle;
+    maShapeParallelUpdateQueue.push(aQueueElement);
+}
+
+void box2DWorld::queueAngularVelocityUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape,
+    const double fAngularVelocity, const int nDelayForSteps)
+{
+    Box2DDynamicUpdateInformation aQueueElement
+        = { xShape, {}, BOX2D_UPDATE_ANGULAR_VELOCITY, nDelayForSteps };
+    aQueueElement.mfAngularVelocity = fAngularVelocity;
+    maShapeParallelUpdateQueue.push(aQueueElement);
+}
+
+void box2DWorld::queueShapeVisibilityUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape, const bool bVisibility)
+{
+    Box2DDynamicUpdateInformation aQueueElement = { xShape, {}, BOX2D_UPDATE_VISIBILITY };
+    aQueueElement.mbVisibility = bVisibility;
+    maShapeParallelUpdateQueue.push(aQueueElement);
+}
+
+void box2DWorld::queueShapePositionUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape,
+    const basegfx::B2DPoint& rOutPos)
+{
+    Box2DDynamicUpdateInformation aQueueElement = { xShape, {}, BOX2D_UPDATE_POSITION };
+    aQueueElement.maPosition = rOutPos;
+    maShapeParallelUpdateQueue.push(aQueueElement);
+}
+
+void box2DWorld::queueShapePathAnimationUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape,
+    const slideshow::internal::ShapeAttributeLayerSharedPtr& pAttrLayer, const bool bIsFirstUpdate)
+{
+    // Workaround for PathAnimations since they do not have their own AttributeType
+    // - using PosX makes it register a DynamicPositionUpdate -
+    queueShapeAnimationUpdate(xShape, pAttrLayer, slideshow::internal::AttributeType::PosX,
+                              bIsFirstUpdate);
+}
+
+void box2DWorld::queueShapeAnimationUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape,
+    const slideshow::internal::ShapeAttributeLayerSharedPtr& pAttrLayer,
+    const slideshow::internal::AttributeType eAttrType, const bool bIsFirstUpdate)
+{
+    switch (eAttrType)
+    {
+        case slideshow::internal::AttributeType::Visibility:
+            queueShapeVisibilityUpdate(xShape, pAttrLayer->getVisibility());
+            return;
+        case slideshow::internal::AttributeType::Rotate:
+            queueDynamicRotationUpdate(xShape, pAttrLayer->getRotationAngle());
+            return;
+        case slideshow::internal::AttributeType::PosX:
+        case slideshow::internal::AttributeType::PosY:
+            if (bIsFirstUpdate) // if it is the first update shape should _teleport_ to the position
+                queueShapePositionUpdate(xShape, { pAttrLayer->getPosX(), pAttrLayer->getPosY() });
+            else
+                queueDynamicPositionUpdate(xShape,
+                                           { pAttrLayer->getPosX(), pAttrLayer->getPosY() });
+            return;
+        default:
+            return;
+    }
+}
+
+void box2DWorld::queueShapeAnimationEndUpdate(
+    const css::uno::Reference<com::sun::star::drawing::XShape>& xShape,
+    const slideshow::internal::AttributeType eAttrType)
+{
+    switch (eAttrType)
+    {
+        // end updates that change the velocity are delayed for a step
+        // since we do not want them to override the last position/angle
+        case slideshow::internal::AttributeType::Rotate:
+            queueAngularVelocityUpdate(xShape, 0.0, 1);
+            return;
+        case slideshow::internal::AttributeType::PosX:
+        case slideshow::internal::AttributeType::PosY:
+            queueLinearVelocityUpdate(xShape, { 0, 0 }, 1);
+            return;
+        default:
+            return;
+    }
+}
+
+void box2DWorld::alertPhysicsAnimationEnd(const slideshow::internal::ShapeSharedPtr& pShape)
+{
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(pShape->getXShape())->second;
+    // since the animation ended make the body static
+    makeBodyStatic(pBox2DBody);
+    pBox2DBody->setRestitution(fDefaultStaticBodyBounciness);
+    if (--mnPhysicsAnimationCounter == 0)
+    {
+        // if there are no more physics animation effects going on clean up
+        maShapeParallelUpdateQueue = {};
+        mbShapesInitialized = false;
+        // clearing the map will make the box2d bodies get
+        // destroyed if there's nothing else that owns them
+        mpXShapeToBodyMap.clear();
+    }
+    else
+    {
+        // the physics animation that will take over the lock after this one
+        // shouldn't step the world for an update cycle - since it was already
+        // stepped.
+        mbAlreadyStepped = true;
+    }
+}
+
+void box2DWorld::alertPhysicsAnimationStart(
+    const ::basegfx::B2DVector& rSlideSize,
+    const slideshow::internal::ShapeManagerSharedPtr& pShapeManager)
+{
+    if (!mpBox2DWorld)
+        initiateWorld(rSlideSize);
+
+    if (!mbShapesInitialized)
+        initiateAllShapesAsStaticBodies(pShapeManager);
+
+    mnPhysicsAnimationCounter++;
+}
+
+void box2DWorld::step(const float fTimeStep, const int nVelocityIterations,
+                      const int nPositionIterations)
+{
+    assert(mpBox2DWorld);
+    mpBox2DWorld->Step(fTimeStep, nVelocityIterations, nPositionIterations);
+}
+
+double box2DWorld::stepAmount(const double fPassedTime, const float fTimeStep,
+                              const int nVelocityIterations, const int nPositionIterations)
+{
+    assert(mpBox2DWorld);
+
+    unsigned int nStepAmount = static_cast<unsigned int>(std::round(fPassedTime / fTimeStep));
+    // find the actual time that will be stepped through so
+    // that the updates can be processed using that value
+    double fTimeSteppedThrough = fTimeStep * nStepAmount;
+
+    // do the updates required to simulate other animation effects going in parallel
+    processUpdateQueue(fTimeSteppedThrough);
+
+    if (!mbAlreadyStepped)
+    {
+        for (unsigned int nStepCounter = 0; nStepCounter < nStepAmount; nStepCounter++)
+        {
+            step(fTimeStep, nVelocityIterations, nPositionIterations);
+        }
+    }
+    else
+    {
+        // just got the step lock from another physics animation
+        // so skipping stepping the world for an update cycle
+        mbAlreadyStepped = false;
+    }
+
+    return fTimeSteppedThrough;
+}
+
+bool box2DWorld::shapesInitialized() { return mbShapesInitialized; }
+
+bool box2DWorld::isInitialized() const
+{
+    if (mpBox2DWorld)
+        return true;
+    else
+        return false;
+}
+
+Box2DBodySharedPtr
+box2DWorld::makeShapeDynamic(const css::uno::Reference<css::drawing::XShape>& xShape,
+                             const basegfx::B2DVector& rStartVelocity, const double fDensity,
+                             const double fBounciness)
+{
+    assert(mpBox2DWorld);
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+    pBox2DBody->setDensityAndRestitution(fDensity, fBounciness);
+    queueLinearVelocityUpdate(xShape, rStartVelocity, 1);
+    return makeBodyDynamic(pBox2DBody);
+}
+
+Box2DBodySharedPtr makeBodyDynamic(const Box2DBodySharedPtr& pBox2DBody)
+{
+    if (pBox2DBody->getType() != BOX2D_DYNAMIC_BODY)
+    {
+        pBox2DBody->setType(BOX2D_DYNAMIC_BODY);
+    }
+    return pBox2DBody;
+}
+
+Box2DBodySharedPtr box2DWorld::makeShapeStatic(const slideshow::internal::ShapeSharedPtr& pShape)
+{
+    assert(mpBox2DWorld);
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(pShape->getXShape())->second;
+    return makeBodyStatic(pBox2DBody);
+}
+
+Box2DBodySharedPtr makeBodyStatic(const Box2DBodySharedPtr& pBox2DBody)
+{
+    if (pBox2DBody->getType() != BOX2D_STATIC_BODY)
+    {
+        pBox2DBody->setType(BOX2D_STATIC_BODY);
+    }
+    return pBox2DBody;
+}
+
+Box2DBodySharedPtr box2DWorld::createStaticBody(const slideshow::internal::ShapeSharedPtr& rShape,
+                                                const float fDensity, const float fFriction)
+{
+    assert(mpBox2DWorld);
+
+    ::basegfx::B2DRectangle aShapeBounds = rShape->getBounds();
+
+    b2BodyDef aBodyDef;
+    aBodyDef.type = b2_staticBody;
+    aBodyDef.position = convertB2DPointToBox2DVec2(aShapeBounds.getCenter(), mfScaleFactor);
+
+    slideshow::internal::ShapeAttributeLayerSharedPtr pShapeAttributeLayer
+        = static_cast<slideshow::internal::AttributableShape*>(rShape.get())
+              ->getTopmostAttributeLayer();
+    if (pShapeAttributeLayer && pShapeAttributeLayer->isRotationAngleValid())
+    {
+        // if the shape's rotation value was altered by another animation effect set it.
+        aBodyDef.angle = ::basegfx::deg2rad(-pShapeAttributeLayer->getRotationAngle());
+    }
+
+    // create a shared pointer with a destructor so that the body will be properly destroyed
+    std::shared_ptr<b2Body> pBody(mpBox2DWorld->CreateBody(&aBodyDef), [](b2Body* pB2Body) {
+        pB2Body->GetWorld()->DestroyBody(pB2Body);
+    });
+
+    SdrObject* pSdrObject = SdrObject::getSdrObjectFromXShape(rShape->getXShape());
+
+    rtl::OUString aShapeType = rShape->getXShape()->getShapeType();
+
+    basegfx::B2DPolyPolygon aPolyPolygon;
+    // workaround:
+    // TakeXorPoly() doesn't return beziers for CustomShapes and we want the beziers
+    // so that we can decide the complexity of the polygons generated from them
+    if (aShapeType == "com.sun.star.drawing.CustomShape")
+    {
+        aPolyPolygon = static_cast<SdrObjCustomShape*>(pSdrObject)->GetLineGeometry(true);
+    }
+    else
+    {
+        aPolyPolygon = pSdrObject->TakeXorPoly();
+    }
+
+    // make beziers into polygons, using a high degree angle as fAngleBound in
+    // adaptiveSubdivideByAngle reduces complexity of the resulting polygon shapes
+    aPolyPolygon = aPolyPolygon.areControlPointsUsed()
+                       ? basegfx::utils::adaptiveSubdivideByAngle(aPolyPolygon, 20)
+                       : aPolyPolygon;
+    aPolyPolygon.removeDoublePoints();
+
+    // make polygon coordinates relative to the center of the shape instead of top left of the slide
+    // since box2d shapes are expressed this way
+    aPolyPolygon
+        = basegfx::utils::distort(aPolyPolygon, aPolyPolygon.getB2DRange(),
+                                  { -aShapeBounds.getWidth() / 2, -aShapeBounds.getHeight() / 2 },
+                                  { aShapeBounds.getWidth() / 2, -aShapeBounds.getHeight() / 2 },
+                                  { -aShapeBounds.getWidth() / 2, aShapeBounds.getHeight() / 2 },
+                                  { aShapeBounds.getWidth() / 2, aShapeBounds.getHeight() / 2 });
+
+    if (pSdrObject->IsClosedObj() && !pSdrObject->IsEdgeObj() && pSdrObject->HasFillStyle())
+    {
+        basegfx::triangulator::B2DTriangleVector aTriangleVector;
+        // iterate over the polygons of the shape and create representations for them
+        for (const auto& rPolygon : std::as_const(aPolyPolygon))
+        {
+            // if the polygon is closed it will be represented by triangles
+            if (rPolygon.isClosed())
+            {
+                basegfx::triangulator::B2DTriangleVector aTempTriangleVector(
+                    basegfx::triangulator::triangulate(rPolygon));
+                aTriangleVector.insert(aTriangleVector.end(), aTempTriangleVector.begin(),
+                                       aTempTriangleVector.end());
+            }
+            else // otherwise it will be an edge representation (example: smile line of the smiley shape)
+            {
+                addEdgeShapeToBody(rPolygon, pBody.get(), fDensity, fFriction,
+                                   static_cast<float>(fDefaultStaticBodyBounciness), mfScaleFactor);
+            }
+        }
+        addTriangleVectorToBody(aTriangleVector, pBody.get(), fDensity, fFriction,
+                                static_cast<float>(fDefaultStaticBodyBounciness), mfScaleFactor);
+    }
+    else
+    {
+        addEdgeShapeToBody(aPolyPolygon, pBody.get(), fDensity, fFriction,
+                           static_cast<float>(fDefaultStaticBodyBounciness), mfScaleFactor);
+    }
+
+    return std::make_shared<box2DBody>(pBody, mfScaleFactor);
+}
+
+box2DBody::box2DBody(std::shared_ptr<b2Body> pBox2DBody, double fScaleFactor)
+    : mpBox2DBody(pBox2DBody)
+    , mfScaleFactor(fScaleFactor)
+{
+}
+
+::basegfx::B2DPoint box2DBody::getPosition() const
+{
+    b2Vec2 aPosition = mpBox2DBody->GetPosition();
+    double fX = static_cast<double>(aPosition.x) / mfScaleFactor;
+    double fY = static_cast<double>(aPosition.y) / -mfScaleFactor;
+    return ::basegfx::B2DPoint(fX, fY);
+}
+
+void box2DBody::setPosition(const basegfx::B2DPoint& rPos)
+{
+    mpBox2DBody->SetTransform(convertB2DPointToBox2DVec2(rPos, mfScaleFactor),
+                              mpBox2DBody->GetAngle());
+}
+
+void box2DBody::setPositionByLinearVelocity(const basegfx::B2DPoint& rDesiredPos,
+                                            const double fPassedTime)
+{
+    // kinematic bodies are not affected by other bodies, but unlike static ones can still have velocity
+    if (mpBox2DBody->GetType() != b2_kinematicBody)
+        mpBox2DBody->SetType(b2_kinematicBody);
+
+    ::basegfx::B2DPoint aCurrentPos = getPosition();
+    // calculate the velocity needed to reach the rDesiredPos in the given time frame
+    ::basegfx::B2DVector aVelocity = (rDesiredPos - aCurrentPos) / fPassedTime;
+
+    setLinearVelocity(aVelocity);
+}
+
+void box2DBody::setAngleByAngularVelocity(const double fDesiredAngle, const double fPassedTime)
+{
+    // kinematic bodies are not affected by other bodies, but unlike static ones can still have velocity
+    if (mpBox2DBody->GetType() != b2_kinematicBody)
+        mpBox2DBody->SetType(b2_kinematicBody);
+
+    double fDeltaAngle = fDesiredAngle - getAngle();
+
+    // temporary hack for repeating animation effects
+    while (fDeltaAngle > 180
+           || fDeltaAngle < -180) // if it is bigger than 180 opposite rotation is actually closer
+        fDeltaAngle += fDeltaAngle > 0 ? -360 : +360;
+
+    double fAngularVelocity = fDeltaAngle / fPassedTime;
+    setAngularVelocity(fAngularVelocity);
+}
+
+void box2DBody::setLinearVelocity(const ::basegfx::B2DVector& rVelocity)
+{
+    b2Vec2 aVelocity = { static_cast<float>(rVelocity.getX() * mfScaleFactor),
+                         static_cast<float>(rVelocity.getY() * -mfScaleFactor) };
+    mpBox2DBody->SetLinearVelocity(aVelocity);
+}
+
+void box2DBody::setAngularVelocity(const double fAngularVelocity)
+{
+    float fBox2DAngularVelocity = static_cast<float>(basegfx::deg2rad(-fAngularVelocity));
+    mpBox2DBody->SetAngularVelocity(fBox2DAngularVelocity);
+}
+
+void box2DBody::setCollision(const bool bCanCollide)
+{
+    // collision have to be set for each fixture of the body individually
+    for (b2Fixture* pFixture = mpBox2DBody->GetFixtureList(); pFixture;
+         pFixture = pFixture->GetNext())
+    {
+        b2Filter aFilter = pFixture->GetFilterData();
+        // 0xFFFF means collides with everything
+        // 0x0000 means collides with nothing
+        aFilter.maskBits = bCanCollide ? 0xFFFF : 0x0000;
+        pFixture->SetFilterData(aFilter);
+    }
+}
+
+double box2DBody::getAngle() const
+{
+    double fAngle = static_cast<double>(mpBox2DBody->GetAngle());
+    return ::basegfx::rad2deg(-fAngle);
+}
+
+void box2DBody::setAngle(const double fAngle)
+{
+    mpBox2DBody->SetTransform(mpBox2DBody->GetPosition(), ::basegfx::deg2rad(-fAngle));
+}
+
+void box2DBody::setDensityAndRestitution(const double fDensity, const double fRestitution)
+{
+    // density and restitution have to be set for each fixture of the body individually
+    for (b2Fixture* pFixture = mpBox2DBody->GetFixtureList(); pFixture;
+         pFixture = pFixture->GetNext())
+    {
+        pFixture->SetDensity(static_cast<float>(fDensity));
+        pFixture->SetRestitution(static_cast<float>(fRestitution));
+    }
+    // without resetting the massdata of the body, density change won't take effect
+    mpBox2DBody->ResetMassData();
+}
+
+void box2DBody::setRestitution(const double fRestitution)
+{
+    for (b2Fixture* pFixture = mpBox2DBody->GetFixtureList(); pFixture;
+         pFixture = pFixture->GetNext())
+    {
+        pFixture->SetRestitution(static_cast<float>(fRestitution));
+    }
+}
+
+void box2DBody::setType(box2DBodyType eType)
+{
+    mpBox2DBody->SetType(getBox2DInternalBodyType(eType));
+}
+
+box2DBodyType box2DBody::getType() const { return getBox2DLOBodyType(mpBox2DBody->GetType()); }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */