/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpvector.h
*
* 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 3 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, see
* .
*/
#if !defined (__GIMP_MATH_H_INSIDE__) && !defined (GIMP_MATH_COMPILATION)
#error "Only can be included directly."
#endif
#ifndef __GIMP_VECTOR_H__
#define __GIMP_VECTOR_H__
G_BEGIN_DECLS
/* For information look into the C source or the html documentation */
/* Two dimensional vector functions */
/* ================================ */
GimpVector2 gimp_vector2_new (gdouble x,
gdouble y);
void gimp_vector2_set (GimpVector2 *vector,
gdouble x,
gdouble y);
gdouble gimp_vector2_length (const GimpVector2 *vector);
gdouble gimp_vector2_length_val (GimpVector2 vector);
void gimp_vector2_mul (GimpVector2 *vector,
gdouble factor);
GimpVector2 gimp_vector2_mul_val (GimpVector2 vector,
gdouble factor);
void gimp_vector2_normalize (GimpVector2 *vector);
GimpVector2 gimp_vector2_normalize_val (GimpVector2 vector);
void gimp_vector2_neg (GimpVector2 *vector);
GimpVector2 gimp_vector2_neg_val (GimpVector2 vector);
void gimp_vector2_add (GimpVector2 *result,
const GimpVector2 *vector1,
const GimpVector2 *vector2);
GimpVector2 gimp_vector2_add_val (GimpVector2 vector1,
GimpVector2 vector2);
void gimp_vector2_sub (GimpVector2 *result,
const GimpVector2 *vector1,
const GimpVector2 *vector2);
GimpVector2 gimp_vector2_sub_val (GimpVector2 vector1,
GimpVector2 vector2);
gdouble gimp_vector2_inner_product (const GimpVector2 *vector1,
const GimpVector2 *vector2);
gdouble gimp_vector2_inner_product_val (GimpVector2 vector1,
GimpVector2 vector2);
GimpVector2 gimp_vector2_cross_product (const GimpVector2 *vector1,
const GimpVector2 *vector2);
GimpVector2 gimp_vector2_cross_product_val (GimpVector2 vector1,
GimpVector2 vector2);
void gimp_vector2_rotate (GimpVector2 *vector,
gdouble alpha);
GimpVector2 gimp_vector2_rotate_val (GimpVector2 vector,
gdouble alpha);
GimpVector2 gimp_vector2_normal (GimpVector2 *vector);
GimpVector2 gimp_vector2_normal_val (GimpVector2 vector);
/* Three dimensional vector functions */
/* ================================== */
GimpVector3 gimp_vector3_new (gdouble x,
gdouble y,
gdouble z);
void gimp_vector3_set (GimpVector3 *vector,
gdouble x,
gdouble y,
gdouble z);
gdouble gimp_vector3_length (const GimpVector3 *vector);
gdouble gimp_vector3_length_val (GimpVector3 vector);
void gimp_vector3_mul (GimpVector3 *vector,
gdouble factor);
GimpVector3 gimp_vector3_mul_val (GimpVector3 vector,
gdouble factor);
void gimp_vector3_normalize (GimpVector3 *vector);
GimpVector3 gimp_vector3_normalize_val (GimpVector3 vector);
void gimp_vector3_neg (GimpVector3 *vector);
GimpVector3 gimp_vector3_neg_val (GimpVector3 vector);
void gimp_vector3_add (GimpVector3 *result,
const GimpVector3 *vector1,
const GimpVector3 *vector2);
GimpVector3 gimp_vector3_add_val (GimpVector3 vector1,
GimpVector3 vector2);
void gimp_vector3_sub (GimpVector3 *result,
const GimpVector3 *vector1,
const GimpVector3 *vector2);
GimpVector3 gimp_vector3_sub_val (GimpVector3 vector1,
GimpVector3 vector2);
gdouble gimp_vector3_inner_product (const GimpVector3 *vector1,
const GimpVector3 *vector2);
gdouble gimp_vector3_inner_product_val (GimpVector3 vector1,
GimpVector3 vector2);
GimpVector3 gimp_vector3_cross_product (const GimpVector3 *vector1,
const GimpVector3 *vector2);
GimpVector3 gimp_vector3_cross_product_val (GimpVector3 vector1,
GimpVector3 vector2);
void gimp_vector3_rotate (GimpVector3 *vector,
gdouble alpha,
gdouble beta,
gdouble gamma);
GimpVector3 gimp_vector3_rotate_val (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,
const GimpVector3 *vp,
GimpVector3 *p);
GimpVector3 gimp_vector_2d_to_3d_val (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,
const GimpVector3 *vp,
const GimpVector3 *p);
G_END_DECLS
#endif /* __GIMP_VECTOR_H__ */