VsMouseSpring.cpp

#include "StdAfx.h"
#include "VsMouseSpring.h"


namespace VortexAnimatSim
{
        namespace Visualization
        {

VsMouseSpring* VsMouseSpring::m_instance = NULL;

VsMouseSpring::VsMouseSpring(void)
{
        m_gdeLine = NULL;
        m_aryLines = NULL;
        m_v3Start.set(0,0,0);
        m_v3End.set(1,0,0);
        m_osgRB = NULL;
}

VsMouseSpring::~VsMouseSpring(void)
{
}

void VsMouseSpring::Visible(bool bVal)
{
        if(bVal)
                m_gdeLine->setNodeMask(0x1);
        else
                m_gdeLine->setNodeMask(0x0);
}

void VsMouseSpring::Initialize()
{
        //create a line geometry
        m_linesGeom = new osg::Geometry();      

        m_aryLines = new osg::Vec3Array();
        
        m_aryLines->push_back(m_v3Start);
        m_aryLines->push_back(m_v3End);

        //set the vertex array
        m_linesGeom->setVertexArray(m_aryLines.get());  

        //add a primativeset to the geometry
        m_linesGeom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP,0,m_aryLines->size()));

         // set the color
    osg::Vec4Array* colors = new osg::Vec4Array;
    colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
        colors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f));
    m_linesGeom->setColorArray(colors);
        m_linesGeom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);

        //m_linesGeom display list so that the geometry updates each frame
        m_linesGeom->setDataVariance(osg::Object::DYNAMIC);
        m_linesGeom->setUseDisplayList(false);

        m_gdeLine = new osg::Geode();
        m_gdeLine->addDrawable(m_linesGeom.get());

        osg::StateSet *ss = new osg::StateSet();
        ss->setMode( GL_LIGHTING, osg::StateAttribute::PROTECTED | osg::StateAttribute::OFF );

    m_lineWidth = new osg::LineWidth();
    m_lineWidth->setWidth(1.0f);
    ss->setAttributeAndModes(m_lineWidth.get(), osg::StateAttribute::ON);
    ss->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
    m_gdeLine->setStateSet(ss);

        //Initially not visible.
        Visible(false);
}

void VsMouseSpring::SetStart(osg::Vec3 v3Start)
{
        m_v3Start = v3Start;
        Update();
}

void VsMouseSpring::SetEnd(osg::Vec3 v3End)
{
        m_v3End = v3End;
        Update();
}

void VsMouseSpring::Update()
{
        (*m_aryLines)[0].set(m_v3Start);
        (*m_aryLines)[1].set(m_v3End);

        m_linesGeom->dirtyBound();
}

        }// end Visualization
}// end VortexAnimatSim