include/3dview.h

   1 /*
   2  *
   3  *                This source code is part of
   4  *
   5  *                 G   R   O   M   A   C   S
   6  *
   7  *          GROningen MAchine for Chemical Simulations
   8  *
   9  *                        VERSION 3.2.0
  10  * Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
  11  * Copyright (c) 1991-2000, University of Groningen, The Netherlands.
  12  * Copyright (c) 2001-2004, The GROMACS development team,
  13  * check out http://www.gromacs.org for more information.
  14
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
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  35
  36 #ifndef _3dview_h
  37 #define _3dview_h
  38
  39 #ifdef HAVE_CONFIG_H
  40 #include <config.h>
  41 #endif
  42
  43 #include "typedefs.h"
  44
  45 #ifdef __cplusplus
  46 extern "C" {
  47 #endif
  48
  49 #define WW 3
  50
  51 typedef real vec4[4];
  52
  53 typedef real mat4[4][4];
  54
  55 typedef int  iv2[2];
  56
  57 typedef struct {
  58   matrix box;
  59   int    ecenter;       /* enum for centering, see pbc.h        */
  60   vec4   eye,origin;    /* The eye and origin position          */
  61   mat4   proj;          /* Projection matrix                    */
  62   mat4   Rot;           /* Total rotation matrix                */
  63   real   sc_x,sc_y;     /* Scaling for aspect ratio             */
  64   mat4   RotP[DIM];     /* state for 3d rotations  */
  65   mat4   RotM[DIM];
  66 } t_3dview;
  67
  68 extern void print_m4(FILE *fp,const char *s,mat4 A);
  69
  70 extern void print_v4(FILE *fp,char *s,int dim,real *a);
  71
  72 extern void m4_op(mat4 m,rvec x,vec4 v);
  73
  74 extern void unity_m4(mat4 m);
  75
  76 extern void mult_matrix(mat4 A, mat4 B, mat4 C);
  77
  78 extern void rotate(int axis, real angle, mat4 A);
  79
  80 extern void translate(real tx, real ty, real tz, mat4 A);
  81
  82 extern void m4_op(mat4 m,rvec x,vec4 v);
  83
  84 extern void calculate_view(t_3dview *view);
  85
  86 extern t_3dview *init_view(matrix box);
  87 /* Generate the view matrix from the eye pos and the origin,
  88  * applying also the scaling for the aspect ration.
  89  * There is no accompanying done_view routine: the struct can simply
  90  * be sfree'd.
  91  */
  92
  93 /* The following options are present on the 3d struct:
  94  * zoom (scaling)
  95  * rotate around the center of the box
  96  * reset the view
  97  */
  98
  99 extern bool zoom_3d(t_3dview *view,real fac);
 100 /* Zoom in or out with factor fac, returns TRUE when zoom successful,
 101  * FALSE otherwise.
 102  */
 103
 104 extern void init_rotate_3d(t_3dview *view);
 105 /* Initiates the state of 3d rotation matrices in the structure */
 106
 107 extern void rotate_3d(t_3dview *view,int axis,bool bPositive);
 108 /* Rotate the eye around the center of the box, around axis */
 109
 110 extern void translate_view(t_3dview *view,int axis,bool bPositive);
 111 /* Translate the origin at which one is looking */
 112
 113 extern void reset_view(t_3dview *view);
 114 /* Reset the viewing to the initial view */
 115
 116 #ifdef __cplusplus
 117 }
 118 #endif
 119
 120 #endif
 121