xref: /aoo42x/main/svx/source/engine3d/helperhittest3d.cxx (revision cdf0e10c)

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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"

#include <svx/helperhittest3d.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <svx/svdpage.hxx>
#include <svx/scene3d.hxx>
#include <svx/svditer.hxx>
#include <drawinglayer/processor3d/cutfindprocessor3d.hxx>
#include <svx/sdr/contact/viewcontactofe3d.hxx>
#include <svx/sdr/contact/viewcontactofe3dscene.hxx>
#include <com/sun/star/uno/Sequence.h>

//////////////////////////////////////////////////////////////////////////////

using namespace com::sun::star;

//////////////////////////////////////////////////////////////////////////////

class ImplPairDephAndObject
{
private:
	const E3dCompoundObject*    mpObject;
	double                      mfDepth;

public:
    ImplPairDephAndObject(const E3dCompoundObject* pObject, double fDepth)
    :   mpObject(pObject),
        mfDepth(fDepth)
    {}

    // for ::std::sort
	bool operator<(const ImplPairDephAndObject& rComp) const
    {
    	return (mfDepth < rComp.mfDepth);
    }

    // data read access
    const E3dCompoundObject* getObject() const { return mpObject; }
    double getDepth() const { return mfDepth; }
};

//////////////////////////////////////////////////////////////////////////////

void getAllHit3DObjectWithRelativePoint(
    const basegfx::B3DPoint& rFront,
    const basegfx::B3DPoint& rBack,
    const E3dCompoundObject& rObject,
    const drawinglayer::geometry::ViewInformation3D& rObjectViewInformation3D,
    ::std::vector< basegfx::B3DPoint >& o_rResult,
    bool bAnyHit)
{
    o_rResult.clear();

    if(!rFront.equal(rBack))
    {
        // rObject is a E3dCompoundObject, so it cannot be a scene (which is a E3dObject)
        const sdr::contact::ViewContactOfE3d& rVCObject = static_cast< sdr::contact::ViewContactOfE3d& >(rObject.GetViewContact());
	    const drawinglayer::primitive3d::Primitive3DSequence aPrimitives(rVCObject.getViewIndependentPrimitive3DSequence());

        if(aPrimitives.hasElements())
        {
            // make BoundVolume empty and overlapping test for speedup
            const basegfx::B3DRange aObjectRange(drawinglayer::primitive3d::getB3DRangeFromPrimitive3DSequence(aPrimitives, rObjectViewInformation3D));

            if(!aObjectRange.isEmpty())
            {
                const basegfx::B3DRange aFrontBackRange(rFront, rBack);

                if(aObjectRange.overlaps(aFrontBackRange))
                {
                    // bound volumes hit, geometric cut tests needed
                    drawinglayer::processor3d::CutFindProcessor aCutFindProcessor(rObjectViewInformation3D, rFront, rBack, bAnyHit);
                    aCutFindProcessor.process(aPrimitives);
                    o_rResult = aCutFindProcessor.getCutPoints();
                }
            }
        }
    }
}

//////////////////////////////////////////////////////////////////////////////

E3dScene* fillViewInformation3DForCompoundObject(drawinglayer::geometry::ViewInformation3D& o_rViewInformation3D, const E3dCompoundObject& rCandidate)
{
	// Search for root scene (outmost scene) of the 3d object since e.g. in chart, multiple scenes may
	// be placed between object and outmost scene. On that search, remember the in-between scene's
	// transformation for the correct complete ObjectTransformation. For historical reasons, the
	// root scene's own object transformation is part of the scene's ViewTransformation, o do not
	// add it. For more details, see ViewContactOfE3dScene::createViewInformation3D.
	E3dScene* pParentScene = dynamic_cast< E3dScene* >(rCandidate.GetParentObj());
	E3dScene* pRootScene = 0;
    basegfx::B3DHomMatrix aInBetweenSceneMatrix;

	while(pParentScene)
	{
		E3dScene* pParentParentScene = dynamic_cast< E3dScene* >(pParentScene->GetParentObj());

		if(pParentParentScene)
		{
			// pParentScene is a in-between scene
            aInBetweenSceneMatrix = pParentScene->GetTransform() * aInBetweenSceneMatrix;
		}
		else
		{
			// pParentScene is the root scene
			pRootScene = pParentScene;
		}

		pParentScene = pParentParentScene;
	}

	if(pRootScene)
	{
        const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(pRootScene->GetViewContact());

        if(aInBetweenSceneMatrix.isIdentity())
		{
			o_rViewInformation3D = rVCScene.getViewInformation3D();
		}
		else
        {
            // build new ViewInformation containing all transforms for the candidate
	        const drawinglayer::geometry::ViewInformation3D aViewInfo3D(rVCScene.getViewInformation3D());

			o_rViewInformation3D = drawinglayer::geometry::ViewInformation3D(
                aViewInfo3D.getObjectTransformation() * aInBetweenSceneMatrix,
                aViewInfo3D.getOrientation(),
                aViewInfo3D.getProjection(),
                aViewInfo3D.getDeviceToView(),
                aViewInfo3D.getViewTime(),
                aViewInfo3D.getExtendedInformationSequence());
        }
	}
	else
	{
		const uno::Sequence< beans::PropertyValue > aEmptyParameters;
		o_rViewInformation3D = drawinglayer::geometry::ViewInformation3D(aEmptyParameters);
	}

	return pRootScene;
}

//////////////////////////////////////////////////////////////////////////////

SVX_DLLPUBLIC void getAllHit3DObjectsSortedFrontToBack(
    const basegfx::B2DPoint& rPoint,
    const E3dScene& rScene,
    ::std::vector< const E3dCompoundObject* >& o_rResult)
{
	o_rResult.clear();
    SdrObjList* pList = rScene.GetSubList();

    if(pList && pList->GetObjCount())
    {
        // prepare relative HitPoint. To do so, get the VC of the 3DScene and from there
        // the Scene's 2D transformation. Multiplying with the inverse transformation
        // will create a point relative to the 3D scene as unit-2d-object
        const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(rScene.GetViewContact());
		basegfx::B2DHomMatrix aInverseSceneTransform(rVCScene.getObjectTransformation());
        aInverseSceneTransform.invert();
        const basegfx::B2DPoint aRelativePoint(aInverseSceneTransform * rPoint);

        // check if test point is inside scene's area at all
        if(aRelativePoint.getX() >= 0.0 && aRelativePoint.getX() <= 1.0 && aRelativePoint.getY() >= 0.0 && aRelativePoint.getY() <= 1.0)
        {
	        SdrObjListIter aIterator(*pList, IM_DEEPNOGROUPS);
	        ::std::vector< ImplPairDephAndObject > aDepthAndObjectResults;
			const uno::Sequence< beans::PropertyValue > aEmptyParameters;
			drawinglayer::geometry::ViewInformation3D aViewInfo3D(aEmptyParameters);

	        while(aIterator.IsMore())
	        {
		        const E3dCompoundObject* pCandidate = dynamic_cast< const E3dCompoundObject* >(aIterator.Next());

		        if(pCandidate)
		        {
					fillViewInformation3DForCompoundObject(aViewInfo3D, *pCandidate);

				    // create HitPoint Front and Back, transform to object coordinates
                    basegfx::B3DHomMatrix aViewToObject(aViewInfo3D.getObjectToView());
                    aViewToObject.invert();
				    const basegfx::B3DPoint aFront(aViewToObject * basegfx::B3DPoint(aRelativePoint.getX(), aRelativePoint.getY(), 0.0));
				    const basegfx::B3DPoint aBack(aViewToObject * basegfx::B3DPoint(aRelativePoint.getX(), aRelativePoint.getY(), 1.0));

                    if(!aFront.equal(aBack))
                    {
                        // get all hit points with object
                        ::std::vector< basegfx::B3DPoint > aHitsWithObject;
                        getAllHit3DObjectWithRelativePoint(aFront, aBack, *pCandidate, aViewInfo3D, aHitsWithObject, false);

                        for(sal_uInt32 a(0); a < aHitsWithObject.size(); a++)
                        {
                            const basegfx::B3DPoint aPointInViewCoordinates(aViewInfo3D.getObjectToView() * aHitsWithObject[a]);
                            aDepthAndObjectResults.push_back(ImplPairDephAndObject(pCandidate, aPointInViewCoordinates.getZ()));
                        }
                    }
                }
	        }

	        // fill nRetval
	        const sal_uInt32 nCount(aDepthAndObjectResults.size());

	        if(nCount)
	        {
		        // sort aDepthAndObjectResults by depth
		        ::std::sort(aDepthAndObjectResults.begin(), aDepthAndObjectResults.end());

		        // copy SdrObject pointers to return result set
		        ::std::vector< ImplPairDephAndObject >::iterator aIterator2(aDepthAndObjectResults.begin());

		        for(;aIterator2 != aDepthAndObjectResults.end(); aIterator2++)
		        {
			        o_rResult.push_back(aIterator2->getObject());
		        }
	        }
        }
    }
}

//////////////////////////////////////////////////////////////////////////////

bool checkHitSingle3DObject(
    const basegfx::B2DPoint& rPoint,
	const E3dCompoundObject& rCandidate)
{
	const uno::Sequence< beans::PropertyValue > aEmptyParameters;
	drawinglayer::geometry::ViewInformation3D aViewInfo3D(aEmptyParameters);
	E3dScene* pRootScene = fillViewInformation3DForCompoundObject(aViewInfo3D, rCandidate);

	if(pRootScene)
	{
        // prepare relative HitPoint. To do so, get the VC of the 3DScene and from there
        // the Scene's 2D transformation. Multiplying with the inverse transformation
        // will create a point relative to the 3D scene as unit-2d-object
        const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(pRootScene->GetViewContact());
		basegfx::B2DHomMatrix aInverseSceneTransform(rVCScene.getObjectTransformation());
        aInverseSceneTransform.invert();
        const basegfx::B2DPoint aRelativePoint(aInverseSceneTransform * rPoint);

        // check if test point is inside scene's area at all
        if(aRelativePoint.getX() >= 0.0 && aRelativePoint.getX() <= 1.0 && aRelativePoint.getY() >= 0.0 && aRelativePoint.getY() <= 1.0)
        {
		    // create HitPoint Front and Back, transform to object coordinates
            basegfx::B3DHomMatrix aViewToObject(aViewInfo3D.getObjectToView());
            aViewToObject.invert();
		    const basegfx::B3DPoint aFront(aViewToObject * basegfx::B3DPoint(aRelativePoint.getX(), aRelativePoint.getY(), 0.0));
		    const basegfx::B3DPoint aBack(aViewToObject * basegfx::B3DPoint(aRelativePoint.getX(), aRelativePoint.getY(), 1.0));

            if(!aFront.equal(aBack))
            {
                // get all hit points with object
                ::std::vector< basegfx::B3DPoint > aHitsWithObject;
                getAllHit3DObjectWithRelativePoint(aFront, aBack, rCandidate, aViewInfo3D, aHitsWithObject, true);

                if(aHitsWithObject.size())
                {
					return true;
				}
			}
		}
	}

	return false;
}

//////////////////////////////////////////////////////////////////////////////
// eof