CoordFrameNode.cc

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//=============================================================================
//
//  CLASS CoordFrameNode - IMPLEMENTATION
//
//=============================================================================

//== INCLUDES =================================================================


#include "CoordFrameNode.hh"
#include "SceneGraph.hh"
#include "../GL/gltext.hh"
#include "../GL/stipple_alpha.hh"

#include <cstdio>


//== NAMESPACES ===============================================================


namespace ACG {
namespace SceneGraph {


//== IMPLEMENTATION ========================================================== 


CoordFrameNode::
CoordFrameNode(BaseNode* _parent, const std::string& _name)
  : MaterialNode(_parent, _name)
{
  bb_min_ = bb_max_ = Vec3f(0,0,0);
}


//-----------------------------------------------------------------------------


DrawModes::DrawMode
CoordFrameNode::availableDrawModes() const
{
  return ( DrawModes::WIREFRAME           |
           DrawModes::SOLID_FLAT_SHADED   );
}


//-----------------------------------------------------------------------------


void 
CoordFrameNode::boundingBox(Vec3d& _bbMin, Vec3d& _bbMax)
{
  _bbMin.minimize(bb_min_);
  _bbMax.maximize(bb_max_);
}
  

//-----------------------------------------------------------------------------


void 
CoordFrameNode::draw(GLState& /* _state */ , const DrawModes::DrawMode& /* _drawMode */ )
{
  // draw bounding box

  ACG::GLState::disable(GL_LIGHTING);
  ACG::GLState::shadeModel(GL_FLAT);

  glBegin(GL_LINE_LOOP);
  glVertex3f(bb_min_[0], bb_min_[1], bb_min_[2]);
  glVertex3f(bb_max_[0], bb_min_[1], bb_min_[2]);
  glVertex3f(bb_max_[0], bb_max_[1], bb_min_[2]);
  glVertex3f(bb_min_[0], bb_max_[1], bb_min_[2]);
  glEnd();

  glBegin(GL_LINE_LOOP);
  glVertex3f(bb_min_[0], bb_min_[1], bb_max_[2]);
  glVertex3f(bb_max_[0], bb_min_[1], bb_max_[2]);
  glVertex3f(bb_max_[0], bb_max_[1], bb_max_[2]);
  glVertex3f(bb_min_[0], bb_max_[1], bb_max_[2]);
  glEnd();

  glBegin(GL_LINES);
  glVertex3f(bb_min_[0], bb_min_[1], bb_min_[2]);
  glVertex3f(bb_min_[0], bb_min_[1], bb_max_[2]);
  glVertex3f(bb_max_[0], bb_min_[1], bb_min_[2]);
  glVertex3f(bb_max_[0], bb_min_[1], bb_max_[2]);
  glVertex3f(bb_max_[0], bb_max_[1], bb_min_[2]);
  glVertex3f(bb_max_[0], bb_max_[1], bb_max_[2]);
  glVertex3f(bb_min_[0], bb_max_[1], bb_min_[2]);
  glVertex3f(bb_min_[0], bb_max_[1], bb_max_[2]);
  glEnd();



  // draw planes: transparently filled

  std::vector<float>::const_iterator p_it, p_end;
  Vec3f v0, v1, v2, v3;
  char s[20], axis;


  stipple_alpha(0.25);

  p_it  = x_planes_.begin(); 
  p_end = x_planes_.end();
  axis  = 'x';


  for (bool finished(false); !finished; )
  {
    // break check
    if (p_it == p_end)
    {
      switch (axis)
      {
        case 'x':
          p_it  = y_planes_.begin(); 
          p_end = y_planes_.end();
          axis  = 'y';
          break;

        case 'y':
          p_it  = z_planes_.begin(); 
          p_end = z_planes_.end();
          axis  = 'z';
          break;

        default:
          finished = true;
          break;
      }
      continue;
    }


    switch (axis)
    {
      case 'x':
        v0 = Vec3f(*p_it, bb_min_[1], bb_min_[2]);
        v1 = Vec3f(*p_it, bb_max_[1], bb_min_[2]);
        v2 = Vec3f(*p_it, bb_max_[1], bb_max_[2]);
        v3 = Vec3f(*p_it, bb_min_[1], bb_max_[2]);
        break;

      case 'y':
        v0 = Vec3f(bb_min_[0], *p_it, bb_min_[2]);
        v1 = Vec3f(bb_max_[0], *p_it, bb_min_[2]);
        v2 = Vec3f(bb_max_[0], *p_it, bb_max_[2]);
        v3 = Vec3f(bb_min_[0], *p_it, bb_max_[2]);
        break;

      case 'z':
        v0 = Vec3f(bb_min_[0], bb_min_[1], *p_it);
        v1 = Vec3f(bb_max_[0], bb_min_[1], *p_it);
        v2 = Vec3f(bb_max_[0], bb_max_[1], *p_it);
        v3 = Vec3f(bb_min_[0], bb_max_[1], *p_it);
        break;
    };


    // quads
    glBegin(GL_QUADS);
    glVertex(v0);  glVertex(v1);  glVertex(v2);  glVertex(v3);
    glEnd();


    // outlines
    glBegin(GL_LINE_LOOP);
    glVertex(v0);  glVertex(v1);  glVertex(v2);  glVertex(v3);
    glEnd();


    // text
    sprintf(s, "%c=%f", axis, *p_it);
    glText(v0, s);  glText(v1, s);  glText(v2, s);  glText(v3, s);


    ++p_it;
  }


  stipple_alpha(1.0);
}


//-----------------------------------------------------------------------------


void 
CoordFrameNode::update_bounding_box()
{
  BoundingBoxAction bb_action;
  traverse(this, bb_action);

  bb_min_ = bb_action.bbMin();
  bb_max_ = bb_action.bbMax();
}


//-----------------------------------------------------------------------------


void 
CoordFrameNode::set_bounding_box(const Vec3f& _bb_min, const Vec3f& _bb_max)
{
  bb_min_ = _bb_min;
  bb_max_ = _bb_max;
}


//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================