Add BLI_math_solver, where non-linear solvers should be.

For now, only has an eigen solver for 3×3 (symmetric) matrix.

1 files changed, 66 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_math_solvers.h b/source/blender/blenlib/BLI_math_solvers.h
new file mode 100644
index 00000000000..ec9ba5538e2
--- /dev/null
+++ b/source/blender/blenlib/BLI_math_solvers.h
@@ -0,0 +1,66 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2015 by Blender Foundation
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ * */
+
+#ifndef __BLI_MATH_SOLVERS_H__
+#define __BLI_MATH_SOLVERS_H__
+
+/** \file BLI_math_solvers.h
+ *  \ingroup bli
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "BLI_compiler_attrs.h"
+#include "BLI_math_inline.h"
+
+#ifdef BLI_MATH_GCC_WARN_PRAGMA
+#  pragma GCC diagnostic push
+#  pragma GCC diagnostic ignored "-Wredundant-decls"
+#endif
+
+/********************************** Eigen Solvers *********************************/
+
+bool BLI_eigen_solve_selfadjoint_m3(const float m3[3][3], float r_eigen_values[3], float r_eigen_vectors[3][3]);
+
+
+/**************************** Inline Definitions ******************************/
+#if 0  /* None so far. */
+#  if BLI_MATH_DO_INLINE
+#    include "intern/math_geom_inline.c"
+#  endif
+#endif
+
+#ifdef BLI_MATH_GCC_WARN_PRAGMA
+#  pragma GCC diagnostic pop
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __BLI_MATH_SOLVERS_H__ */
+