include/3dview.h

   1 /*
   2  * $Id$
   3  *
   4  *                This source code is part of
   5  *
   6  *                 G   R   O   M   A   C   S
   7  *
   8  *          GROningen MAchine for Chemical Simulations
   9  *
  10  *                        VERSION 3.1
  11  * Copyright (c) 1991-2001, University of Groningen, The Netherlands
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * If you want to redistribute modifications, please consider that
  18  * scientific software is very special. Version control is crucial -
  19  * bugs must be traceable. We will be happy to consider code for
  20  * inclusion in the official distribution, but derived work must not
  21  * be called official GROMACS. Details are found in the README & COPYING
  22  * files - if they are missing, get the official version at www.gromacs.org.
  23  *
  24  * To help us fund GROMACS development, we humbly ask that you cite
  25  * the papers on the package - you can find them in the top README file.
  26  *
  27  * For more info, check our website at http://www.gromacs.org
  28  *
  29  * And Hey:
  30  * Grunge ROck MAChoS
  31  */
  32
  33 #ifndef _3dview_h
  34 #define _3dview_h
  35
  36 static char *SRCID_3dview_h = "$Id$";
  37 #ifdef HAVE_CONFIG_H
  38 #include <config.h>
  39 #endif
  40
  41 #include <typedefs.h>
  42
  43 #define WW 3
  44
  45 typedef real vec4[4];
  46
  47 typedef real mat4[4][4];
  48
  49 typedef int  iv2[2];
  50
  51 typedef struct {
  52   matrix box;
  53   vec4   eye,origin;    /* The eye and origin position          */
  54   mat4   proj;          /* Projection matrix                    */
  55   mat4   Rot;           /* Total rotation matrix                */
  56   real   sc_x,sc_y;     /* Scaling for aspect ratio             */
  57 } t_3dview;
  58
  59 extern void print_m4(FILE *fp,char *s,mat4 A);
  60
  61 extern void print_v4(FILE *fp,char *s,int dim,real *a);
  62
  63 extern void m4_op(mat4 m,rvec x,vec4 v);
  64
  65 extern void unity_m4(mat4 m);
  66
  67 extern void mult_matrix(mat4 A, mat4 B, mat4 C);
  68
  69 extern void rotate(int axis, real angle, mat4 A);
  70
  71 extern void translate(real tx, real ty, real tz, mat4 A);
  72
  73 extern void m4_op(mat4 m,rvec x,vec4 v);
  74
  75 extern void calculate_view(t_3dview *view);
  76
  77 extern t_3dview *init_view(matrix box);
  78 /* Generate the view matrix from the eye pos and the origin,
  79  * applying also the scaling for the aspect ration.
  80  * There is no accompanying done_view routine: the struct can simply
  81  * be sfree'd.
  82  */
  83
  84 /* The following options are present on the 3d struct:
  85  * zoom (scaling)
  86  * rotate around the center of the box
  87  * reset the view
  88  */
  89
  90 extern bool zoom_3d(t_3dview *view,real fac);
  91 /* Zoom in or out with factor fac, returns TRUE when zoom succesful,
  92  * FALSE otherwise.
  93  */
  94
  95 extern void rotate_3d(t_3dview *view,int axis,bool bPositive);
  96 /* Rotate the eye around the center of the box, around axis */
  97
  98 extern void translate_view(t_3dview *view,int axis,bool bPositive);
  99 /* Translate the origin at which one is looking */
 100
 101 extern void reset_view(t_3dview *view);
 102 /* Reset the viewing to the initial view */
 103
 104 #endif
 105