C++ BoundingBox::yMin方法代码示例

        inline void init_towbar()
        {
            body_s_ = findFirstNode((tow_visual_object_)->root(),"body_s");
            body_b_ = findFirstNode((tow_visual_object_)->root(),"body_b");
            body_a_ = findFirstNode((tow_visual_object_)->root(),"body_a");

            osg::ComputeBoundsVisitor cbvs;
            body_s_->accept( cbvs );
            const osg::BoundingBox bb_s = cbvs.getBoundingBox();

            osg::ComputeBoundsVisitor cbvb;
            body_b_->accept( cbvb );
            const osg::BoundingBox bb_b = cbvb.getBoundingBox();

            osg::ComputeBoundsVisitor cbva;
            body_a_->accept( cbva );
            const osg::BoundingBox bb_a = cbva.getBoundingBox();

            osg::ComputeBoundsVisitor cbv;
            (tow_visual_object_)->root()->accept( cbv );
            const osg::BoundingBox bb_ = cbv.getBoundingBox();

            radius_   = abs(bb_.yMax() - bb_.yMin())/2.0;//(*tow_visual_object_)->root()->getBound().radius();

            radius_s_ = abs(bb_s.yMax() - bb_s.yMin())/2.0;//body_s_->getBound().radius();
            radius_a_ = abs(bb_a.yMax() - bb_a.yMin())/2.0;//body_a_->getBound().radius(); 
            radius_b_ = abs(bb_b.yMax() - bb_b.yMin())/2.0;//body_b_->getBound().radius();
        }

BboxDrawable::BboxDrawable( const osg::BoundingBox& box, const BBoxSymbol &bboxSymbol ) :
osg::Geometry()
{
    setUseVertexBufferObjects(true);

    float margin = bboxSymbol.margin().isSet() ? bboxSymbol.margin().value() : 2.f;
    osg::Vec3Array* v = new osg::Vec3Array();
    if ( bboxSymbol.geom().isSet() && bboxSymbol.geom().value() == BBoxSymbol::GEOM_BOX_ORIENTED )
    {
        float h = box.yMax() - box.yMin() + 2.f * margin;
        v->push_back( osg::Vec3(box.xMax()+margin+h/2.f, box.yMax()+margin-h/2.f, 0) );
    }
    v->push_back( osg::Vec3(box.xMax()+margin, box.yMax()+margin, 0) );
    v->push_back( osg::Vec3(box.xMin()-margin, box.yMax()+margin, 0) );
    v->push_back( osg::Vec3(box.xMin()-margin, box.yMin()-margin, 0) );
    v->push_back( osg::Vec3(box.xMax()+margin, box.yMin()-margin, 0) );
    setVertexArray(v);
    if ( v->getVertexBufferObject() )
        v->getVertexBufferObject()->setUsage(GL_STATIC_DRAW_ARB);

    osg::Vec4Array* c = new osg::Vec4Array();
    if ( bboxSymbol.fill().isSet() )
    {
        c->push_back( bboxSymbol.fill()->color() );
        addPrimitiveSet( new osg::DrawArrays(GL_POLYGON, 0, v->getNumElements()) );
    }

    if ( bboxSymbol.border().isSet() )
    {
        c->push_back( bboxSymbol.border()->color() );
        if ( bboxSymbol.border()->width().isSet() )
            getOrCreateStateSet()->setAttribute( new osg::LineWidth( bboxSymbol.border()->width().value() ));
        addPrimitiveSet( new osg::DrawArrays(GL_LINE_LOOP, 0, v->getNumElements()) );
    }

    setColorArray( c );
    setColorBinding( osg::Geometry::BIND_PER_PRIMITIVE_SET );

    // add the static "isText=true" uniform; this is a hint for the annotation shaders
    // if they get installed.
    static osg::ref_ptr<osg::Uniform> s_isTextUniform = new osg::Uniform(osg::Uniform::BOOL, AnnotationUtils::UNIFORM_IS_TEXT());
    s_isTextUniform->set( false );
    getOrCreateStateSet()->addUniform( s_isTextUniform.get() );

    // Disable culling since this bounding box will eventually be drawn in screen space.
#if OSG_MIN_VERSION_REQUIRED(3,4,0)
    setCullingActive(false);
#endif
}

void BuildKdTree::computeDivisions(KdTree::BuildOptions& options)
{
    osg::Vec3 dimensions(_bb.xMax()-_bb.xMin(),
                         _bb.yMax()-_bb.yMin(),
                         _bb.zMax()-_bb.zMin());

#ifdef VERBOSE_OUTPUT
    OSG_NOTICE<<"computeDivisions("<<options._maxNumLevels<<") "<<dimensions<< " { "<<std::endl;
#endif

    _axisStack.reserve(options._maxNumLevels);

    for(unsigned int level=0; level<options._maxNumLevels; ++level)
    {
        int axis = 0;
        if (dimensions[0]>=dimensions[1])
        {
            if (dimensions[0]>=dimensions[2]) axis = 0;
            else axis = 2;
        }
        else if (dimensions[1]>=dimensions[2]) axis = 1;
        else axis = 2;

        _axisStack.push_back(axis);
        dimensions[axis] /= 2.0f;

#ifdef VERBOSE_OUTPUT
        OSG_NOTICE<<"  "<<level<<", "<<dimensions<<", "<<axis<<std::endl;
#endif
    }

#ifdef VERBOSE_OUTPUT
    OSG_NOTICE<<"}"<<std::endl;
#endif
}

BboxDrawable::BboxDrawable( const osg::BoundingBox& box, const BBoxSymbol &bboxSymbol ) :
osg::Geometry()
{
    setUseVertexBufferObjects(true);

    float margin = bboxSymbol.margin().isSet() ? bboxSymbol.margin().value() : 2.f;
    osg::Vec3Array* v = new osg::Vec3Array();
    if ( bboxSymbol.geom().isSet() && bboxSymbol.geom().value() == BBoxSymbol::GEOM_BOX_ORIENTED )
    {
        float h = box.yMax() - box.yMin() + 2.f * margin;
        v->push_back( osg::Vec3(box.xMax()+margin+h/2.f, box.yMax()+margin-h/2.f, 0) );
    }
    v->push_back( osg::Vec3(box.xMax()+margin, box.yMax()+margin, 0) );
    v->push_back( osg::Vec3(box.xMin()-margin, box.yMax()+margin, 0) );
    v->push_back( osg::Vec3(box.xMin()-margin, box.yMin()-margin, 0) );
    v->push_back( osg::Vec3(box.xMax()+margin, box.yMin()-margin, 0) );
    setVertexArray(v);
    if ( v->getVertexBufferObject() )
        v->getVertexBufferObject()->setUsage(GL_STATIC_DRAW_ARB);

    osg::Vec4Array* c = new osg::Vec4Array(osg::Array::BIND_PER_PRIMITIVE_SET);
    if ( bboxSymbol.fill().isSet() )
    {
        c->push_back( bboxSymbol.fill()->color() );
        osg::DrawElements* de = new osg::DrawElementsUByte(GL_TRIANGLE_STRIP);
        de->addElement(0);
        de->addElement(1);
        de->addElement(3);
        de->addElement(2);
        addPrimitiveSet(de);
        //addPrimitiveSet( new osg::DrawArrays(GL_POLYGON, 0, v->getNumElements()) );
    }

    if ( bboxSymbol.border().isSet() )
    {
        c->push_back( bboxSymbol.border()->color() );
        if ( bboxSymbol.border()->width().isSet() )
            getOrCreateStateSet()->setAttribute( new osg::LineWidth( bboxSymbol.border()->width().value() ));
        addPrimitiveSet( new osg::DrawArrays(GL_LINE_LOOP, 0, v->getNumElements()) );
    }

    setColorArray( c );

    // Disable culling since this bounding box will eventually be drawn in screen space.
    setCullingActive(false);
}

osg::BoundingSphere
TileNode::computeBound() const
{
    osg::BoundingSphere bs;
    if (_surface.valid())
    {
        bs = _surface->getBound();
        const osg::BoundingBox bbox = _surface->getAlignedBoundingBox();
        _tileKeyValue.a() = std::max( (bbox.xMax()-bbox.xMin()), (bbox.yMax()-bbox.yMin()) );
    }    
    return bs;
}

CSulGeomBox::CSulGeomBox( const osg::BoundingBox& bb ) :
CSulGeode()
{
	m_minX = bb.xMin();
	m_maxX = bb.xMax();
	m_minY = bb.yMin();
	m_maxY = bb.yMax();
	m_minZ = bb.zMin();
	m_maxZ = bb.zMax();

	createDrawable();
}

osg::ref_ptr<osg::Geometry> HUDView::createRandNumBackground(osg::BoundingBox bb)
{
	osg::ref_ptr<osg::Geometry> geom = new osg::Geometry;
	osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;

	osg::Vec3 sizeUpY(0, bb.yMax() + bb.yMax() / 2, 0.0);
	osg::Vec3 sizeUpYN(0, -bb.yMax() / 2, 0.0);
	bb.expandBy(sizeUpY);
	bb.expandBy(sizeUpYN);


	osg::Vec3 halfExtent((bb.xMax() - bb.xMin()) / 2.0, (bb.yMax() - bb.yMin()) / 2.0f, 0);
	float x_length = bb.xMax() - bb.xMin();
	float y_length = bb.yMax() - bb.yMin();

	vertices->push_back(osg::Vec3(0, y_length, 0) - halfExtent);
	vertices->push_back(osg::Vec3(0, 0, 0) - halfExtent);
	vertices->push_back(osg::Vec3(x_length, 0, 0) - halfExtent);
	vertices->push_back(osg::Vec3(x_length, y_length, 0) - halfExtent);
	geom->setVertexArray(vertices);
	osg::ref_ptr<osg::Vec3Array> normals = new osg::Vec3Array;
	normals->push_back(osg::Vec3(0.0f, 0.0f, 1.0f));
	geom->setNormalArray(normals, osg::Array::BIND_OVERALL);
	osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array;
	colors->push_back(osg::Vec4(0.0f, 0.2f, 1.0f, 0.7f));
	geom->setColorArray(colors, osg::Array::BIND_OVERALL);
	geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS, 0, 4));
	osg::ref_ptr<osg::StateSet> stateset = geom->getOrCreateStateSet();
	stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
	stateset->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
	//stateset->setAttribute(new osg::PolygonOffset(1.0f,1.0f),osg::StateAttribute::ON);
	stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);

	return geom;

}

void Style::setupClipStateSet(const osg::BoundingBox& extents, osg::StateSet* stateset)
{
    unsigned int clipTextureUnit = 1;

    stateset->setAttributeAndModes( new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.0f), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);

    stateset->setTextureAttributeAndModes( clipTextureUnit, _clipTexture.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);

    osg::Matrixd matrix = osg::Matrixd::translate(osg::Vec3(-extents.xMin(), -extents.yMin(), -extents.zMin()))*
                          osg::Matrixd::scale(osg::Vec3(1.0f/(extents.xMax()-extents.xMin()), 1.0f/(extents.yMax()-extents.yMin()), 1.0f));

    osg::ref_ptr<osg::TexGen> texgen = new osg::TexGen;
    texgen->setPlanesFromMatrix(matrix);
    texgen->setMode(osg::TexGen::OBJECT_LINEAR);
    stateset->setTextureAttributeAndModes( clipTextureUnit, texgen.get(), osg::StateAttribute::ON);
}

osg::Vec2 Curve::mapTo2D( const osg::Vec3 p, osg::BoundingBox originRect, osg::BoundingBox newRect )
{
    if ( originRect.xMin()==originRect.xMax() )
    {
        newRect.zMin() = newRect.yMin(); newRect.zMax() = newRect.yMax();
        newRect.yMin() = newRect.xMin(); newRect.yMax() = newRect.xMax();
        newRect.xMin() = 0.0;            newRect.xMax() = 0.0;
    }
    else if ( originRect.yMin()==originRect.yMax() )
    {
        newRect.zMin() = newRect.yMin(); newRect.zMax() = newRect.yMax();
        newRect.yMin() = 0.0;            newRect.yMax() = 0.0;
    }

    osg::Vec3 newPoint = mapTo( p, originRect, newRect );
    osg::Vec2 point2D( newPoint.x(), newPoint.y() );
    if ( originRect.xMin()==originRect.xMax() ) point2D.set( newPoint.y(), newPoint.z() );
    else if ( originRect.yMin()==originRect.yMax() ) point2D.set( newPoint.x(), newPoint.z() );

    return point2D;
}

void
WriterCompareTriangle::cutscene(int                     nbVertices,
                                const osg::BoundingBox& sceneBox)
{
    osg::BoundingBox::vec_type length = sceneBox._max - sceneBox._min;

    static const unsigned int k = 4;

    unsigned int nbVerticesX = (nbVertices * k) / (length.z() * length.y());
    unsigned int nbVerticesY = (nbVertices * k) / (length.z() * length.x());
    unsigned int nbVerticesZ = (nbVertices * k) / (length.x() * length.y());

    setMaxMin (nbVerticesX, nbVerticesY, nbVerticesZ);

    OSG_DEBUG << "Cutting x by " << nbVerticesX << std::endl
        << "Cutting y by " << nbVerticesY << std::endl
        << "Cutting z by " << nbVerticesZ << std::endl;

    osg::BoundingBox::value_type blocX = length.x() / nbVerticesX; //These 3 lines set the size of a box in x, y and z
    osg::BoundingBox::value_type blocY = length.y() / nbVerticesY;
    osg::BoundingBox::value_type blocZ = length.z() / nbVerticesZ;

    boxList.reserve(nbVerticesX * nbVerticesY * nbVerticesZ);
    short yinc = 1;
    short xinc = 1;
    unsigned int y = 0;
    unsigned int x = 0;
    for (unsigned int z = 0; z < nbVerticesZ; ++z)
    {
        while (x < nbVerticesX && x >= 0)
        {
            while (y < nbVerticesY && y >= 0)
            {
                osg::BoundingBox::value_type xMin = sceneBox.xMin() + x * blocX;
                if (x == 0) //to prevent from mesh with no case
                    xMin -= 10;

                osg::BoundingBox::value_type yMin = sceneBox.yMin() + y * blocY;
                if (y == 0) //to prevent from mesh with no case
                    yMin -= 10;

                osg::BoundingBox::value_type zMin = sceneBox.zMin() + z * blocZ;
                if (z == 0) //to prevent from mesh with no case
                    zMin -= 10;

                osg::BoundingBox::value_type xMax = sceneBox.xMin() + (x + 1) * blocX;
                if (x == nbVerticesX - 1) //to prevent from mesh with no case
                    xMax += 10;

                osg::BoundingBox::value_type yMax = sceneBox.yMin() + (y + 1) * blocY;
                if (y == nbVerticesY - 1) //to prevent from mesh with no case
                    yMax += 10;

                osg::BoundingBox::value_type zMax = sceneBox.zMin() + (z + 1) * blocZ;
                if (z == nbVerticesZ - 1) //to prevent from mesh with no case
                    zMax += 10;

                boxList.push_back(osg::BoundingBox(xMin, // Add a box to the list
                    yMin,
                    zMin,
                    xMax, 
                    yMax,
                    zMax));
                y += yinc;
            }
            yinc = -yinc;
            y += yinc;
            x += xinc;
        }
        xinc = -xinc;
        x += xinc;
    }
}

void WriterCompareTriangle::cutscene(int nbVertices, const osg::BoundingBox & sceneBox)
{
    osg::BoundingBox::vec_type length = sceneBox._max - sceneBox._min;

    static const float k = 1.3f;        // Arbitrary constant multiplier for density computation ("simulates" non-uniform point distributions)
    // Computes "density" of points, and thus the number of blocks to divide the mesh into
    int nbVerticesX = static_cast<int>( (nbVertices * k) / (length.z() * length.y()) );
    int nbVerticesY = static_cast<int>( (nbVertices * k) / (length.z() * length.x()) );
    int nbVerticesZ = static_cast<int>( (nbVertices * k) / (length.x() * length.y()) );

    setMaxMin (nbVerticesX, nbVerticesY, nbVerticesZ); // This function prevent from cutting the scene in too many blocs

    OSG_INFO
        << "Cutting x by " << nbVerticesX << std::endl
        << "Cutting y by " << nbVerticesY << std::endl
        << "Cutting z by " << nbVerticesZ << std::endl;

    osg::BoundingBox::value_type blocX = length.x() / nbVerticesX;    // These 3 lines set the size of a bloc in x, y and z
    osg::BoundingBox::value_type blocY = length.y() / nbVerticesY;
    osg::BoundingBox::value_type blocZ = length.z() / nbVerticesZ;

    boxList.reserve(nbVerticesX * nbVerticesY * nbVerticesZ);
    short yinc = 1;
    short xinc = 1;
    int y = 0;
    int x = 0;
    for (int z = 0; z < nbVerticesZ; ++z)
    {
        while (x < nbVerticesX && x >= 0)
        {
            while (y < nbVerticesY && y >= 0)
            {
                osg::BoundingBox::value_type xMin = sceneBox.xMin() + x * blocX;
                if (x == 0) //to prevent from mesh with no case
                    xMin -= 10;

                osg::BoundingBox::value_type yMin = sceneBox.yMin() + y * blocY;
                if (y == 0) //to prevent from mesh with no case
                    yMin -= 10;

                osg::BoundingBox::value_type zMin = sceneBox.zMin() + z * blocZ;
                if (z == 0) //to prevent from mesh with no case
                    zMin -= 10;

                osg::BoundingBox::value_type xMax = sceneBox.xMin() + (x + 1) * blocX;
                if (x == nbVerticesX - 1) //to prevent from mesh with no case
                    xMax += 10;

                osg::BoundingBox::value_type yMax = sceneBox.yMin() + (y + 1) * blocY;
                if (y == nbVerticesY - 1) //to prevent from mesh with no case
                    yMax += 10;

                osg::BoundingBox::value_type zMax = sceneBox.zMin() + (z + 1) * blocZ;
                if (z == nbVerticesZ - 1) //to prevent from mesh with no case
                    zMax += 10;

                boxList.push_back(osg::BoundingBox(xMin, // Add a bloc to the list
                    yMin,
                    zMin,
                    xMax,
                    yMax,
                    zMax));
                y += yinc;
            }
            yinc = -yinc;
            y += yinc;
            x += xinc;
        }
        xinc = -xinc;
        x += xinc;
    }
}

bool IntersectKdTree::intersectAndClip(osg::Vec3& s, osg::Vec3& e, const osg::BoundingBox& bb) const
{
    //return true;

    //if (!bb.valid()) return true;

    // compate s and e against the xMin to xMax range of bb.
    if (s.x()<=e.x())
    {

        // trivial reject of segment wholely outside.
        if (e.x()<bb.xMin()) return false;
        if (s.x()>bb.xMax()) return false;

        if (s.x()<bb.xMin())
        {
            // clip s to xMin.
            s = s+_d_invX*(bb.xMin()-s.x());
        }

        if (e.x()>bb.xMax())
        {
            // clip e to xMax.
            e = s+_d_invX*(bb.xMax()-s.x());
        }
    }
    else
    {
        if (s.x()<bb.xMin()) return false;
        if (e.x()>bb.xMax()) return false;

        if (e.x()<bb.xMin())
        {
            // clip s to xMin.
            e = s+_d_invX*(bb.xMin()-s.x());
        }

        if (s.x()>bb.xMax())
        {
            // clip e to xMax.
            s = s+_d_invX*(bb.xMax()-s.x());
        }
    }

    // compate s and e against the yMin to yMax range of bb.
    if (s.y()<=e.y())
    {

        // trivial reject of segment wholely outside.
        if (e.y()<bb.yMin()) return false;
        if (s.y()>bb.yMax()) return false;

        if (s.y()<bb.yMin())
        {
            // clip s to yMin.
            s = s+_d_invY*(bb.yMin()-s.y());
        }

        if (e.y()>bb.yMax())
        {
            // clip e to yMax.
            e = s+_d_invY*(bb.yMax()-s.y());
        }
    }
    else
    {
        if (s.y()<bb.yMin()) return false;
        if (e.y()>bb.yMax()) return false;

        if (e.y()<bb.yMin())
        {
            // clip s to yMin.
            e = s+_d_invY*(bb.yMin()-s.y());
        }

        if (s.y()>bb.yMax())
        {
            // clip e to yMax.
            s = s+_d_invY*(bb.yMax()-s.y());
        }
    }

    // compate s and e against the zMin to zMax range of bb.
    if (s.z()<=e.z())
    {

        // trivial reject of segment wholely outside.
        if (e.z()<bb.zMin()) return false;
        if (s.z()>bb.zMax()) return false;

        if (s.z()<bb.zMin())
        {
            // clip s to zMin.
            s = s+_d_invZ*(bb.zMin()-s.z());
        }

        if (e.z()>bb.zMax())
        {
            // clip e to zMax.
            e = s+_d_invZ*(bb.zMax()-s.z());
//.........这里部分代码省略.........