add bounciness velocity and density options to physics animations

Adding new xml options to specify the starting velocity, bounciness,
and density of the rigid body that physics animation control.

Change-Id: Ifaba785e82c8ee17be00711a3e7a75257e7704ae
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/101141
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

4 files changed, 103 insertions, 11 deletions

diff --git a/slideshow/source/engine/animationfactory.cxx b/slideshow/source/engine/animationfactory.cxx
index 8f6534a30539..327a048afeb1 100644
--- a/slideshow/source/engine/animationfactory.cxx
+++ b/slideshow/source/engine/animationfactory.cxx
@@ -362,6 +362,9 @@ namespace slideshow::internal
                                     const double                 fDuration,
                                     const ShapeManagerSharedPtr& rShapeManager,
                                     const ::basegfx::B2DVector&  rSlideSize,
+                                    const ::basegfx::B2DVector&  rStartVelocity,
+                                    const double                 fDensity,
+                                    const double                 fBounciness,
                                     int                          nFlags ) :
                     mpShape(),
                     mpAttrLayer(),
@@ -372,6 +375,9 @@ namespace slideshow::internal
                     mpBox2DBody(),
                     mpBox2DWorld( pBox2DWorld ),
                     mfDuration(fDuration),
+                    maStartVelocity(rStartVelocity),
+                    mfDensity(fDensity),
+                    mfBounciness(fBounciness),
                     mfPreviousElapsedTime(0.00f),
                     mbIsBox2dWorldStepper(false)
                 {
@@ -411,7 +417,7 @@ namespace slideshow::internal
                     ENSURE_OR_THROW( rAttrLayer,
                                      "PhysicsAnimation::start(): Invalid attribute layer" );
 
-                    mpBox2DBody = mpBox2DWorld->makeShapeDynamic( rShape );
+                    mpBox2DBody = mpBox2DWorld->makeShapeDynamic( rShape->getXShape(), maStartVelocity, mfDensity, mfBounciness );
 
                     if( !mbAnimationStarted )
                     {
@@ -495,6 +501,9 @@ namespace slideshow::internal
                 box2d::utils::Box2DBodySharedPtr   mpBox2DBody;
                 box2d::utils::Box2DWorldSharedPtr  mpBox2DWorld;
                 double                             mfDuration;
+                const ::basegfx::B2DVector         maStartVelocity;
+                const double                       mfDensity;
+                const double                       mfBounciness;
                 double                             mfPreviousElapsedTime;
                 bool                               mbIsBox2dWorldStepper;
             };
@@ -1468,11 +1477,17 @@ namespace slideshow::internal
                                                                               const double                      fDuration,
                                                                               const ShapeManagerSharedPtr&      rShapeManager,
                                                                               const ::basegfx::B2DVector&       rSlideSize,
+                                                                              const ::basegfx::B2DVector&       rStartVelocity,
+                                                                              const double                      fDensity,
+                                                                              const double                      fBounciness,
                                                                               int                               nFlags )
         {
             return std::make_shared<PhysicsAnimation>( pBox2DWorld, fDuration,
                                    rShapeManager,
                                    rSlideSize,
+                                   rStartVelocity,
+                                   fDensity,
+                                   fBounciness,
                                    nFlags );
         }
 
diff --git a/slideshow/source/engine/animationnodes/animationphysicsnode.cxx b/slideshow/source/engine/animationnodes/animationphysicsnode.cxx
index 8f531ea24ed7..3c7c227f2d0c 100644
--- a/slideshow/source/engine/animationnodes/animationphysicsnode.cxx
+++ b/slideshow/source/engine/animationnodes/animationphysicsnode.cxx
@@ -19,6 +19,12 @@
 
 #include "animationphysicsnode.hxx"
 #include <animationfactory.hxx>
+#include <o3tl/any.hxx>
+
+constexpr double fDefaultStartVelocityX(0.0);
+constexpr double fDefaultStartVelocityY(0.0);
+constexpr double fDefaultDensity(1.0);
+constexpr double fDefaultBounciness(0.1);
 
 namespace slideshow::internal
 {
@@ -34,12 +40,47 @@ AnimationActivitySharedPtr AnimationPhysicsNode::createActivity() const
     ENSURE_OR_THROW((mxPhysicsMotionNode->getDuration() >>= fDuration),
                     "Couldn't get the animation duration.");
 
+    ::css::uno::Any aTemp;
+    double fStartVelocityX;
+    aTemp = mxPhysicsMotionNode->getStartVelocityX();
+    if (aTemp.hasValue())
+        aTemp >>= fStartVelocityX;
+    else
+        fStartVelocityX = fDefaultStartVelocityX;
+
+    double fStartVelocityY;
+    aTemp = mxPhysicsMotionNode->getStartVelocityY();
+    if (aTemp.hasValue())
+        aTemp >>= fStartVelocityY;
+    else
+        fStartVelocityY = fDefaultStartVelocityY;
+
+    double fDensity;
+    aTemp = mxPhysicsMotionNode->getDensity();
+    if (aTemp.hasValue())
+    {
+        aTemp >>= fDensity;
+        fDensity = (fDensity < 0.0) ? 0.0 : fDensity;
+    }
+    else
+        fDensity = fDefaultDensity;
+
+    double fBounciness;
+    aTemp = mxPhysicsMotionNode->getBounciness();
+    if (aTemp.hasValue())
+    {
+        aTemp >>= fBounciness;
+        fBounciness = std::clamp(fBounciness, 0.0, 1.0);
+    }
+    else
+        fBounciness = fDefaultBounciness;
+
     ActivitiesFactory::CommonParameters const aParms(fillCommonParameters());
     return ActivitiesFactory::createSimpleActivity(
         aParms,
-        AnimationFactory::createPhysicsAnimation(getContext().mpBox2DWorld, fDuration,
-                                                 getContext().mpSubsettableShapeManager,
-                                                 getSlideSize(), 0),
+        AnimationFactory::createPhysicsAnimation(
+            getContext().mpBox2DWorld, fDuration, getContext().mpSubsettableShapeManager,
+            getSlideSize(), { fStartVelocityX, fStartVelocityY }, fDensity, fBounciness, 0),
         true);
 }
 
diff --git a/slideshow/source/engine/animationnodes/animationphysicsnode.hxx b/slideshow/source/engine/animationnodes/animationphysicsnode.hxx
index 8517dbbb803b..d9af6802a037 100644
--- a/slideshow/source/engine/animationnodes/animationphysicsnode.hxx
+++ b/slideshow/source/engine/animationnodes/animationphysicsnode.hxx
@@ -20,6 +20,7 @@
 
 #include "animationbasenode.hxx"
 #include <com/sun/star/animations/XAnimateMotion.hpp>
+#include <com/sun/star/animations/XAnimatePhysics.hpp>
 
 namespace slideshow
 {
@@ -46,7 +47,7 @@ private:
     virtual AnimationActivitySharedPtr createActivity() const override;
     virtual bool enqueueActivity() const override;
 
-    css::uno::Reference<css::animations::XAnimateMotion> mxPhysicsMotionNode;
+    css::uno::Reference<css::animations::XAnimatePhysics> mxPhysicsMotionNode;
 };
 
 } // namespace internal
diff --git a/slideshow/source/engine/box2dtools.cxx b/slideshow/source/engine/box2dtools.cxx
index bdeabc12e985..845363501ca4 100644
--- a/slideshow/source/engine/box2dtools.cxx
+++ b/slideshow/source/engine/box2dtools.cxx
@@ -20,6 +20,7 @@
 #include <svx/svdoashp.hxx>
 
 #define BOX2D_SLIDE_SIZE_IN_METERS 100.00f
+constexpr double fDefaultStaticBodyBounciness(0.1);
 
 namespace box2d::utils
 {
@@ -551,6 +552,13 @@ void box2DWorld::queueShapeAnimationEndUpdate(
     }
 }
 
+void box2DWorld::alertAnimationEndForShape(const slideshow::internal::ShapeSharedPtr& pShape)
+{
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(pShape->getXShape())->second;
+    makeBodyStatic(pBox2DBody);
+    pBox2DBody->setRestitution(fDefaultStaticBodyBounciness);
+}
+
 void box2DWorld::step(const float fTimeStep, const int nVelocityIterations,
                       const int nPositionIterations)
 {
@@ -586,10 +594,15 @@ bool box2DWorld::isInitialized()
         return false;
 }
 
-Box2DBodySharedPtr box2DWorld::makeShapeDynamic(const slideshow::internal::ShapeSharedPtr& pShape)
+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(pShape->getXShape())->second;
+    Box2DBodySharedPtr pBox2DBody = mpXShapeToBodyMap.find(xShape)->second;
+    pBox2DBody->setDensityAndRestitution(fDensity, fBounciness);
+    queueLinearVelocityUpdate(xShape, rStartVelocity, 1);
     return makeBodyDynamic(pBox2DBody);
 }
 
@@ -679,15 +692,17 @@ Box2DBodySharedPtr box2DWorld::createStaticBody(const slideshow::internal::Shape
             }
             else
             {
-                addEdgeShapeToBody(rPolygon, pBody.get(), fDensity, fFriction, 0.1f, mfScaleFactor);
+                addEdgeShapeToBody(rPolygon, pBody.get(), fDensity, fFriction,
+                                   static_cast<float>(fDefaultStaticBodyBounciness), mfScaleFactor);
             }
         }
-        addTriangleVectorToBody(aTriangleVector, pBody.get(), fDensity, fFriction, 0.1f,
-                                mfScaleFactor);
+        addTriangleVectorToBody(aTriangleVector, pBody.get(), fDensity, fFriction,
+                                static_cast<float>(fDefaultStaticBodyBounciness), mfScaleFactor);
     }
     else
     {
-        addEdgeShapeToBody(aPolyPolygon, pBody.get(), fDensity, fFriction, 0.1f, mfScaleFactor);
+        addEdgeShapeToBody(aPolyPolygon, pBody.get(), fDensity, fFriction,
+                           static_cast<float>(fDefaultStaticBodyBounciness), mfScaleFactor);
     }
 
     return std::make_shared<box2DBody>(pBody, mfScaleFactor);
@@ -776,6 +791,26 @@ void box2DBody::setAngle(const double fAngle)
     mpBox2DBody->SetTransform(mpBox2DBody->GetPosition(), ::basegfx::deg2rad(-fAngle));
 }
 
+void box2DBody::setDensityAndRestitution(const double fDensity, const double fRestitution)
+{
+    for (b2Fixture* pFixture = mpBox2DBody->GetFixtureList(); pFixture;
+         pFixture = pFixture->GetNext())
+    {
+        pFixture->SetDensity(static_cast<float>(fDensity));
+        pFixture->SetRestitution(static_cast<float>(fRestitution));
+    }
+    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));