gimp/libgimp/gimpvector.h

129 lines
3.8 KiB
C

/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* The gimp_vector* functions were taken from:
* GCK - The General Convenience Kit
* Copyright (C) 1996 Tom Bech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GIMP_VECTOR_H__
#define __GIMP_VECTOR_H__
#include <glib.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct _GimpVector2 GimpVector2;
typedef struct _GimpVector3 GimpVector3;
typedef struct _GimpVector4 GimpVector4;
struct _GimpVector2
{
gdouble x, y;
};
struct _GimpVector3
{
gdouble x, y, z;
};
struct _GimpVector4
{
gdouble x, y, z, w;
};
/* Two dimensional vector functions */
/* ================================ */
gdouble gimp_vector2_inner_product (GimpVector2 *vector1,
GimpVector2 *vector2);
GimpVector2 gimp_vector2_cross_product (GimpVector2 *vector1,
GimpVector2 *vector2);
gdouble gimp_vector2_length (GimpVector2 *vector);
void gimp_vector2_normalize (GimpVector2 *vector);
void gimp_vector2_mul (GimpVector2 *vector,
gdouble factor);
void gimp_vector2_sub (GimpVector2 *result,
GimpVector2 *vector1,
GimpVector2 *vector2);
void gimp_vector2_set (GimpVector2 *vector,
gdouble x,
gdouble y);
void gimp_vector2_add (GimpVector2 *result,
GimpVector2 *vector1,
GimpVector2 *vector2);
void gimp_vector2_neg (GimpVector2 *vector);
void gimp_vector2_rotate (GimpVector2 *vector,
gdouble alpha);
/* Three dimensional vector functions */
/* ================================== */
gdouble gimp_vector3_inner_product (GimpVector3 *vector1,
GimpVector3 *vector2);
GimpVector3 gimp_vector3_cross_product (GimpVector3 *vector1,
GimpVector3 *vector2);
gdouble gimp_vector3_length (GimpVector3 *vector);
void gimp_vector3_normalize (GimpVector3 *vector);
void gimp_vector3_mul (GimpVector3 *vector,
gdouble factor);
void gimp_vector3_sub (GimpVector3 *result,
GimpVector3 *vector1,
GimpVector3 *vector2);
void gimp_vector3_set (GimpVector3 *vector,
gdouble x,
gdouble y,
gdouble z);
void gimp_vector3_add (GimpVector3 *result,
GimpVector3 *vector1,
GimpVector3 *vector2);
void gimp_vector3_neg (GimpVector3 *vector);
void gimp_vector3_rotate (GimpVector3 *vector,
gdouble alpha,
gdouble beta,
gdouble gamma);
/* 2d <-> 3d Vector projection functions */
/* ===================================== */
void gimp_vector_2d_to_3d (gint sx,
gint sy,
gint w,
gint h,
gint x,
gint y,
GimpVector3 *vp,
GimpVector3 *p);
void gimp_vector_3d_to_2d (gint sx,
gint sy,
gint w,
gint h,
gdouble *x,
gdouble *y,
GimpVector3 *vp,
GimpVector3 *p);
#ifdef __cplusplus
}
#endif
#endif /* __GIMP_VECTOR_H__ */