--- /dev/null
+/***************************************************************************/
+/* */
+/* ahangles.h */
+/* */
+/* A routine used to compute vector angles with limited accuracy */
+/* and very high speed (specification). */
+/* */
+/* Copyright 2000-2001 Catharon Productions Inc. */
+/* Author: David Turner */
+/* */
+/* This file is part of the Catharon Typography Project and shall only */
+/* be used, modified, and distributed under the terms of the Catharon */
+/* Open Source License that should come with this file under the name */
+/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/* Note that this license is compatible with the FreeType license. */
+/* */
+/***************************************************************************/
+
+
+#ifndef __AHANGLES_H__
+#define __AHANGLES_H__
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_OBJECTS_H
+#include "ahtypes.h"
+
+
+FT_BEGIN_HEADER
+
+
+ /* PI expressed in ah_angles -- we don't really need an important */
+ /* precision, so 256 should be enough */
+#define AH_PI 256
+#define AH_2PI ( AH_PI * 2 )
+#define AH_HALF_PI ( AH_PI / 2 )
+#define AH_2PIMASK ( AH_2PI - 1 )
+
+ /* the number of bits used to express an arc tangent; */
+ /* see the structure of the lookup table */
+#define AH_ATAN_BITS 8
+
+ extern
+ const AH_Angle ah_arctan[1L << AH_ATAN_BITS];
+
+
+ FT_LOCAL AH_Angle
+ ah_angle( FT_Vector* v );
+
+
+FT_END_HEADER
+
+#endif /* __AHANGLES_H__ */
+
+
+/* END */