src/gromacs/math/3dview.h

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  37 #ifndef GMX_MATH_3DVIEW_H
  38 #define GMX_MATH_3DVIEW_H
  39
  40 #include "../utility/basedefinitions.h"
  41 #include "../utility/real.h"
  42 #include "3dtransforms.h"
  43 #include "vectypes.h"
  44
  45 #ifdef __cplusplus
  46 extern "C" {
  47 #endif
  48
  49 typedef int  iv2[2];
  50
  51 typedef struct {
  52     matrix box;
  53     int    ecenter;     /* enum for centering, see pbc.h */
  54     vec4   eye, origin; /* The eye and origin position   */
  55     mat4   proj;        /* Projection matrix             */
  56     mat4   Rot;         /* Total rotation matrix         */
  57     real   sc_x, sc_y;  /* Scaling for aspect ratio      */
  58     mat4   RotP[DIM];   /* state for 3d rotations        */
  59     mat4   RotM[DIM];
  60 } t_3dview;
  61
  62 t_3dview *init_view(matrix box);
  63 /* Generate the view matrix from the eye pos and the origin,
  64  * applying also the scaling for the aspect ration.
  65  * There is no accompanying done_view routine: the struct can simply
  66  * be sfree'd.
  67  */
  68
  69 /* The following options are present on the 3d struct:
  70  * zoom (scaling)
  71  * rotate around the center of the box
  72  * reset the view
  73  */
  74
  75 gmx_bool zoom_3d(t_3dview *view, real fac);
  76 /* Zoom in or out with factor fac, returns TRUE when zoom successful,
  77  * FALSE otherwise.
  78  */
  79
  80 void rotate_3d(t_3dview *view, int axis, gmx_bool bPositive);
  81 /* Rotate the eye around the center of the box, around axis */
  82
  83 void translate_view(t_3dview *view, int axis, gmx_bool bPositive);
  84 /* Translate the origin at which one is looking */
  85
  86 void reset_view(t_3dview *view);
  87 /* Reset the viewing to the initial view */
  88
  89 #ifdef __cplusplus
  90 }
  91 #endif
  92
  93 #endif