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Retired Document

Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.

gle/gutil.h

/*

 * gutil.h

 * FUNCTION:

 * Provide utilities that allow rotation to occur

 * around any axis.

 * HISTORY:

 * created by Linas Vepstas  1990

 * added single & double precision, June 1991, Linas Vepstas

*/

#ifndef __GUTIL_H__

#define __GUTIL_H__

#ifdef __GUTIL_DOUBLE

#define gutDouble double

#else

#define gutDouble float

#endif

#ifdef _NO_PROTO        /* NO ANSI C PROTOTYPING */

/* Rotation Utilities */

extern void rot_axis_f ();

extern void rot_about_axis_f ();

extern void rot_omega_f ();

extern void urot_axis_f ();

extern void urot_about_axis_f ();

extern void urot_omega_f ();

/* double-precision versions */

extern void rot_axis_d ();

extern void rot_about_axis_d ();

extern void rot_omega_d ();

extern void urot_axis_d ();

extern void urot_about_axis_d ();

extern void urot_omega_d ();

/* viewpoint functions */

extern void uview_direction_d ();

extern void uview_direction_f ();

extern void uviewpoint_d ();

extern void uviewpoint_f ();

#else /* _NO_PROTO */       /* ANSI C PROTOTYPING */

/* Rotation Utilities */

extern void rot_axis_f (float omega, float axis[3]);

extern void rot_about_axis_f (float angle, float axis[3]);

extern void rot_omega_f (float axis[3]);

extern void urot_axis_f (float m[4][4], float omega, float axis[3]);

extern void urot_about_axis_f (float m[4][4], float angle, float axis[3]);

extern void urot_omega_f (float m[4][4], float axis[3]);

/* double-precision versions */

extern void rot_axis_d (double omega, double axis[3]);

extern void rot_about_axis_d (double angle, double axis[3]);

extern void rot_omega_d (double axis[3]);

extern void urot_axis_d (double m[4][4], double omega, double axis[3]);

extern void urot_about_axis_d (double m[4][4], double angle, double axis[3]);

extern void urot_omega_d (double m[4][4], double axis[3]);

/* viewpoint functions */

extern void uview_direction_d (double m[4][4],      /* returned */

                        double v21[3],      /* input */

                        double up[3]);      /* input */

extern void uview_direction_f (float m[4][4],       /* returned */

                        float v21[3],       /* input */

                        float up[3]);       /* input */

extern void uviewpoint_d (double m[4][4],       /* returned */

                   double v1[3],        /* input */

                   double v2[3],        /* input */

                   double up[3]);       /* input */

extern void uviewpoint_f (float m[4][4],        /* returned */

                   float v1[3],     /* input */

                   float v2[3],     /* input */

                   float up[3]);        /* input */

#endif /* _NO_PROTO */

#endif /* _GUTIL_H__ */

/* ------------------- end of file ---------------------- */

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