2000-05-28 00:00:28 +00:00
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/* LIBGIMP - The GIMP Library
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2000-02-26 03:41:06 +00:00
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* gimpmatrix.h
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1998-10-14 02:54:02 +00:00
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* Copyright (C) 1998 Jay Cox <jaycox@earthlink.net>
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*
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* This library is free software; you can redistribute it and/or
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1999-11-17 21:13:50 +00:00
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* modify it under the terms of the GNU Lesser General Public
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1998-10-14 02:54:02 +00:00
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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1999-12-26 07:54:39 +00:00
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* Lesser General Public License for more details.
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1998-10-14 02:54:02 +00:00
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*
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1999-11-17 21:13:50 +00:00
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* You should have received a copy of the GNU Lesser General Public
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1998-10-14 02:54:02 +00:00
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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2000-02-14 16:29:41 +00:00
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#ifndef __GIMP_MATRIX_H__
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#define __GIMP_MATRIX_H__
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1998-10-30 10:21:33 +00:00
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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2000-05-30 23:38:46 +00:00
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2000-02-14 16:29:41 +00:00
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typedef gdouble GimpMatrix3[3][3];
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typedef gdouble GimpMatrix4[4][4];
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void gimp_matrix3_transform_point (GimpMatrix3 matrix,
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gdouble x,
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gdouble y,
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gdouble *newx,
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gdouble *newy);
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void gimp_matrix3_mult (GimpMatrix3 matrix1,
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GimpMatrix3 matrix2);
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void gimp_matrix3_identity (GimpMatrix3 matrix);
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void gimp_matrix3_translate (GimpMatrix3 matrix,
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gdouble x,
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gdouble y);
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void gimp_matrix3_scale (GimpMatrix3 matrix,
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gdouble x,
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gdouble y);
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void gimp_matrix3_rotate (GimpMatrix3 matrix,
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gdouble theta);
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void gimp_matrix3_xshear (GimpMatrix3 matrix,
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gdouble amount);
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void gimp_matrix3_yshear (GimpMatrix3 matrix,
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gdouble amount);
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gdouble gimp_matrix3_determinant (GimpMatrix3 matrix);
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void gimp_matrix3_invert (GimpMatrix3 matrix,
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GimpMatrix3 matrix_inv);
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void gimp_matrix3_duplicate (GimpMatrix3 src,
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GimpMatrix3 target);
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gboolean gimp_matrix3_is_diagonal (GimpMatrix3 matrix);
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gboolean gimp_matrix3_is_identity (GimpMatrix3 matrix);
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gboolean gimp_matrix3_is_simple (GimpMatrix3 matrix);
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void gimp_matrix4_to_deg (GimpMatrix4 matrix,
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gdouble *a,
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gdouble *b,
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gdouble *c);
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1998-10-14 02:54:02 +00:00
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2000-05-30 23:38:46 +00:00
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1998-10-30 10:21:33 +00:00
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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1998-10-14 02:54:02 +00:00
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2000-05-30 23:38:46 +00:00
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#endif /* __GIMP_MATRIX_H__ */
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