quad.h

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/*
** ---------------------------------------------------------------
** quad.h  -  Quadrilateral primitive class definition.
**
** ---------------------------------------------------------------
*/

#ifndef _QUAD_H
#define _QUAD_H

/*
** ---------------------------------------------------------------
** Used global definitions:
**
*/
#include <stdio.h>  /* FILE */
#include "prm.h"


class Quad : public Prm
{
 protected:
/*
** ---------------------------------------------------------------
** Protected data type definitions:
*/

  struct Pnt3d {
    double    x;
    double    y;
    double    z;
   };

  struct Vec3d {
    double    x;
    double    y;
    double    z;
   };

/*
** ---------------------------------------------------------------
** Protected object private attributes:
**
*/
  Coord p[4];

 public:
/*
** ---------------------------------------------------------------
** Public constructor and destructor functions:
**
*/
/* --------------------------------------------------------------- */
  Quad( );
  
/* --------------------------------------------------------------- */
  Quad( int back );
  
/* --------------------------------------------------------------- */
  virtual ~Quad( );

 protected:
/*
** ---------------------------------------------------------------
** Protected class functions:
**
*/
/* --------------------------------------------------------------- */
  static void PickCode( double x, double y, double xmin, double xmax,
                        double ymin, double ymax, int cod[4] );

/* --------------------------------------------------------------- */
  static int PickLine( double x, double y, double pick_tol,
                       double x0, double y0, double x1, double y1 );

/* --------------------------------------------------------------- */
  static void FaceNormal( Pnt3d* p0, Pnt3d* p1, Pnt3d* p2, Pnt3d* p3,
                          Vec3d* normal );

/*
** ---------------------------------------------------------------
** Protected instance (object) functions:
**
*/
/* --------------------------------------------------------------- */
  void BuildSolidPrm( Pnt3d* solid_prm );

 public:
/*
** ---------------------------------------------------------------
** Public instance (object) functions
** (implemented in the derived class):
**
*/
/* --------------------------------------------------------------- */
  void Read( FILE* fd );

/* --------------------------------------------------------------- */
  void Write( FILE* fd );

/* --------------------------------------------------------------- */
  int GetNPts( void );

/* --------------------------------------------------------------- */
  void SetCoords( int id, double x, double y );

/* --------------------------------------------------------------- */
  void GetCoords( int id, double* x, double* y );

/* --------------------------------------------------------------- */
  void Set1stPt( double x, double y );

/* --------------------------------------------------------------- */
  void Set2ndPt( double x, double y );

/* --------------------------------------------------------------- */
  int PickArea( double x, double y );

/* --------------------------------------------------------------- */
  int PickVertex( double x, double y, double tol, int* id );

/* --------------------------------------------------------------- */
  int PickSide( double x, double y, double tol, int* id );

/* --------------------------------------------------------------- */
  void Translate( double dx, double dy );

/* --------------------------------------------------------------- */
  void TranslateVertex( int id, double dx, double dy );

/* --------------------------------------------------------------- */
  void TranslateSide( int id, double dx, double dy );

/* --------------------------------------------------------------- */
  void GetBox( double* xmin, double* xmax, 
               double* ymin, double* ymax );

/* --------------------------------------------------------------- */
  void DisplayBoundary( void );

/* --------------------------------------------------------------- */
  void DisplayInterior( void );

/* --------------------------------------------------------------- */
  void DisplaySolid( void );

/* --------------------------------------------------------------- */
  void HighltSolid( void );

/* --------------------------------------------------------------- */
  void DisplayZbuffer( void );

};

#endif

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