arcdraw.cpp

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#include <arcdraw.h>
#include <graphmisc.h>

#define SHOW(x) #x << '=' << (x)


arcdraw::arcdraw(arc const & ac_)
{
  init(ac_);
}

void arcdraw::init(arc const & ac_)
{
  ac = & ac_;
  enableCenter=true;
  enableEndPoints=true;
  enableArc=true;

  update();
}

void arcdraw::update()
{
  assert(ac!=0);

  gobjContainer & g(graphicsdeffered);
  g.nuke();

  if (ac->isStraightLine())
  {
    g.push( new gobjglColor3f(1.0,0.0,0.0) );
    g.push( new gobjglBegin(GL_LINE) );

    g.push( new gobjglVertex3f(ac->p0) );
    g.push( new gobjglVertex3f(ac->p1) );

    g.push( new gobjglEnd() );
    return;
  }

  gobjQuadric * q = new gobjQuadric();
  q->radius=.02;
  g.push(q);

  if (enableCenter)
  {
    g.push( new gobjglColor3f(0.0,1.0,0.0) );
    g.push( new gobjMySphereDraw(ac->center,q) );

    // Two lines from the center to the end points.
    static bool togglecolor=false;

    if (togglecolor)
      g.push( new gobjglColor3ub(34,139,34) );
    else
      g.push( new gobjglColor3ub(139,0,139) );
    togglecolor = !togglecolor;
      
    g.push( new gobjglEnable(GL_LINE_STIPPLE) );
    g.push( new gobjglLineStipple(1,0x0101) );
    g.push( new gobjglBegin(GL_LINE) );

    g.push( new gobjglVertex3f(ac->center) );
    g.push( new gobjglVertex3f(ac->p0) );
    g.push( new gobjglVertex3f(ac->center) );
    g.push( new gobjglVertex3f(ac->p1) );

    g.push( new gobjglEnd() );
    g.push( new gobjglDisable(GL_LINE_STIPPLE) );

  }

  if (enableArc)
  {
//    g.push( new gobjglPushAttrib(GL_CURRENT_BIT) );
//    g.push( new gobjglPushAttrib(GL_LIGHTING_BIT) );
    g.push( new gobjglDisable(GL_LIGHTING) );
    g.push( new gobjglColor3f(1.0,0.0,0.0) );

//cout << SHOW(ac) << endl;
//cout << SHOW(ac->center) << endl;
//cout << SHOW (ac->phi0()*180.0/PI) << endl;
//cout << SHOW (ac->phi1()*180.0/PI) << endl;
    double theta0 = ac->phi0;
    double theta1 = ac->phi1;
/*
    if (theta0>theta1)
    {
      double temp = theta0;
      theta0 = theta1;
      theta1 = temp;
    }
*/
//cout << SHOW (theta0*180.0/PI) << endl;
//cout << SHOW (theta1*180.0/PI) << endl;

    gobjMyCircle * c2;
    if (ac->isAntiClockwise())
      c2=new gobjMyCircle(theta0,theta1,abs(ac->radius));
    else
      c2=new gobjMyCircle(theta1,theta0,abs(ac->radius));

    g.push( new gobjMyCircleDraw(ac->center,*c2) );

//    g.push( new gobjglPopAttrib() );
//    g.push( new gobjglPopAttrib() );
  }

  if (enableEndPoints)
  {
//    g.push( new gobjglEnable(GL_LIGHTING) );
    g.push( new gobjglColor3f(0.0,0.0,1.0) );
    g.push( new gobjMySphereDraw(ac->p0,q) );
    g.push( new gobjMySphereDraw(ac->p1,q) );
  }
}

void arcdraw::draw()
{
  graphicsdeffered.draw();
}