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51 typedef real mat4[4][4];
57 int ecenter; /* enum for centering, see pbc.h */
58 vec4 eye, origin; /* The eye and origin position */
59 mat4 proj; /* Projection matrix */
60 mat4 Rot; /* Total rotation matrix */
61 real sc_x, sc_y; /* Scaling for aspect ratio */
62 mat4 RotP[DIM]; /* state for 3d rotations */
66 extern void print_m4(FILE *fp, const char *s, mat4 A);
68 extern void print_v4(FILE *fp, char *s, int dim, real *a);
70 extern void m4_op(mat4 m, rvec x, vec4 v);
72 extern void unity_m4(mat4 m);
74 extern void mult_matrix(mat4 A, mat4 B, mat4 C);
76 extern void rotate(int axis, real angle, mat4 A);
78 extern void translate(real tx, real ty, real tz, mat4 A);
80 extern void m4_op(mat4 m, rvec x, vec4 v);
82 extern void calculate_view(t_3dview *view);
84 extern t_3dview *init_view(matrix box);
85 /* Generate the view matrix from the eye pos and the origin,
86 * applying also the scaling for the aspect ration.
87 * There is no accompanying done_view routine: the struct can simply
91 /* The following options are present on the 3d struct:
93 * rotate around the center of the box
97 extern gmx_bool zoom_3d(t_3dview *view, real fac);
98 /* Zoom in or out with factor fac, returns TRUE when zoom successful,
102 extern void init_rotate_3d(t_3dview *view);
103 /* Initiates the state of 3d rotation matrices in the structure */
105 extern void rotate_3d(t_3dview *view, int axis, gmx_bool bPositive);
106 /* Rotate the eye around the center of the box, around axis */
108 extern void translate_view(t_3dview *view, int axis, gmx_bool bPositive);
109 /* Translate the origin at which one is looking */
111 extern void reset_view(t_3dview *view);
112 /* Reset the viewing to the initial view */