vpView.h

/****************************************************************************
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2015 by Inria. All rights reserved.
 *
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * ("GPL") version 2 as published by the Free Software Foundation.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See http://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * Le module "view.h" contient les Macros et les types
 * des parametres de visualisation et de transformation 3D.
 *
 * Authors:
 * Jean-Luc CORRE
 *
 *****************************************************************************/

#ifndef vpView_H
#define vpView_H

#include <visp3/core/vpConfig.h>

#ifndef DOXYGEN_SHOULD_SKIP_THIS

/*
 * Macros de numerotation des 6 plans de decoupage :
 * - Les 6 plans de clipping definissent le volume canonique 
 *   de la pyramide de vision dans lequel la scene est visible.
 * - les 6 plans ont pour equations :
 * Plan dessus  :  W = Y
 * Plan dessous : -W = Y
 * Plan droit   :  W = X
 * Plan gauche  : -W = X
 * Plan arriere :  W = Z
 * Plan avant   :  W = 0
 */
#define PLANE_ABOVE 0
#define PLANE_BELOW 1
#define PLANE_RIGHT 2
#define PLANE_LEFT  3
#define PLANE_BACK  4
#define PLANE_FRONT 5
#define PLANE_NBR   6

/*
 * Macros de positionnement des points 4D :
 * Le positionnement d'un point 4D dans l'espace de l'observateur virtuel
 * se fait par rapport aux 6 plans de decoupage.
 * A chaque point 4D on associe 6 bits, un par plan de decoupage.
 */
#define IS_INSIDE   0x00
#define IS_ABOVE    0x01
#define IS_BELOW    0x02
#define IS_RIGHT    0x04
#define IS_LEFT     0x08
#define IS_BACK     0x10
#define IS_FRONT    0x20

#define vpDEFAULT_REMOVE    IS_INSIDE

#define PARALLEL    0
#define PERSPECTIVE 1

#define vpDEFAULT_EYE   { 0.0, 0.0, 1.0 }
#define vpDEFAULT_TARGET    { 0.0, 0.0, 0.0 }
#define vpDEFAULT_FOCAL 1.0
#define vpDEFAULT_ANGLE 45.0
#define vpDEFAULT_TWIST 0.0
#define vpDEFAULT_SPEED 0.0
#define vpDEFAULT_CAMERA    { vpDEFAULT_EYE,    vpDEFAULT_TARGET,\
              vpDEFAULT_FOCAL,vpDEFAULT_ANGLE, vpDEFAULT_TWIST,\
              vpDEFAULT_SPEED }

#define vpDEFAULT_COP   { 0.0, 0.0, 1.0 }
#define vpDEFAULT_VRP   { 0.0, 0.0, 0.0 }
#define vpDEFAULT_VPN   { 0.0, 0.0,-1.0 }
#define vpDEFAULT_VUP   { 0.0, 1.0, 0.0 }
#define vpDEFAULT_VWD   {-1.0, 1.0,-1.0, 1.0 }
#define vpDEFAULT_DEPTH { 0.0, 1.0  }
#define vpDEFAULT_TYPE  PERSPECTIVE

#define vpDEFAULT_VIEW  { vpDEFAULT_TYPE,\
              vpDEFAULT_COP, vpDEFAULT_VRP,\
              vpDEFAULT_VPN, vpDEFAULT_VUP,\
              vpDEFAULT_VWD, vpDEFAULT_DEPTH }

#define vpDEFAULT_WC    { 1.0, 0.0, 0.0, 0.0,\
              0.0, 1.0, 0.0, 0.0,\
              0.0, 0.0, 1.0, 0.0,\
              0.0, 0.0, 0.0, 1.0 }


/*
 *          CAMERA PARAMETERS
 *          _________________
 *
 * La structure "Camera_parameters" definit les parametres de la camera.
 * eye      Position de l'oeil ou de la camera.
 * target   Position de la cible ou du point visee dans la scene.
 * focal    Distance eye-target
 * angle    Angle d'ouverture en degres.
 * twist    Angle de rotation sur l'axe de visee (eye,target) en degres.
 * speed    Vitesse sur l'axe de visee (eye,target).
 */
typedef struct  {
    Point3f eye;        /* position de l'observateur    */
    Point3f target;     /* point vise           */
    float   focal;      /* focale de la camera      */
    float   angle;      /* angle d'ouverture        */
    float   twist;      /* rotation sur l'axe de visee  */
    float   speed;      /* vitesse  sur l'axe de visee  */
} Camera_parameters;

typedef struct  {
    float   umin,umax;  /* bords gauche et droit    */
    float   vmin,vmax;  /* bords inferieur et superieur */
} View_window;

typedef struct  {
    float   front;      /* plan avant ("hither")    */
    float   back;       /* plan arriere ("yon")     */
} View_depth;

typedef struct  {
    Type        type;   /* type de la  projection   */
    Point3f     cop;    /* centre de projection     */
    Point3f     vrp;    /* point de reference de visee  */
    Vector      vpn;    /* vecteur nomal au plan    */
    Vector      vup;    /* vecteur indiquant le "haut"  */
    View_window vwd;    /* fenetre de projection    */
    View_depth  depth;  /* profondeurs de decoupages    */
} View_parameters;

#endif
#endif