fixedmath.h File Reference

This file includes fixed point and three-dimension math routines. More...

#include <errno.h>
#include <math.h>
#include <stdlib.h>

Go to the source code of this file.

Functions
MG_EXPORT fixed	fixsqrt (fixed x)
	Returns the non-negative square root of a fixed point value. More...
MG_EXPORT fixed	fixhypot (fixed x, fixed y)
	Returns the Euclidean distance from the origin. More...
MG_EXPORT fixed	fixatan (fixed x)
	Calculates the arc tangent of a fixed point value. More...
MG_EXPORT fixed	fixatan2 (fixed y, fixed x)
	Calculates the arc tangent of two fixed point variables. More...
static fixed	ftofix (double x)
	Converts a float point value to a fixed point value. More...
static double	fixtof (fixed x)
	Converts a fixed point value to a float point value. More...
static fixed	fixadd (fixed x, fixed y)
	Returns the sum of two fixed point values. More...
static fixed	fixsub (fixed x, fixed y)
	Subtract a fixed point value from another. More...
MG_EXPORT fixed	fixmul (fixed x, fixed y)
	Returns the product of two fixed point values. More...
MG_EXPORT fixed	fixdiv (fixed x, fixed y)
	Returns the quotient of two fixed point values. More...
static int	fixceil (fixed x)
	Rounds a fixed point value to the nearest integer. More...
static fixed	itofix (int x)
	Converts an integer to a fixed point value. More...
static int	fixtoi (fixed x)
	Converts an fixed point value to an integer. More...
static fixed	fixcos (fixed x)
	Returns the cosine of a fixed point. More...
static fixed	fixsin (fixed x)
	Returns the sine of a fixed point. More...
static fixed	fixtan (fixed x)
	Returns the tangent of a fixed point. More...
static fixed	fixacos (fixed x)
	Calculates and returns the arc cosine of a fixed point. More...
static fixed	fixasin (fixed x)
	Calculates and returns the arc sine of a fixed point. More...

Detailed Description

This file includes fixed point and three-dimension math routines.

Author

Wei Yongming vince.nosp@m.nt@m.nosp@m.inigu.nosp@m.i.or.nosp@m.g

Date

2002/01/12

   This file is part of MiniGUI, a mature cross-platform windowing
   and Graphics User Interface (GUI) support system for embedded systems
   and smart IoT devices.

   Copyright (C) 2002~2020, Beijing FMSoft Technologies Co., Ltd.
   Copyright (C) 1998~2002, WEI Yongming

   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 3 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, see <http://www.gnu.org/licenses/>.

   Or,

   As this program is a library, any link to this program must follow
   GNU General Public License version 3 (GPLv3). If you cannot accept
   GPLv3, you need to be licensed from FMSoft.

   If you have got a commercial license of this program, please use it
   under the terms and conditions of the commercial license.

   For more information about the commercial license, please refer to
   <http://www.minigui.com/blog/minigui-licensing-policy/>.

Definition in file fixedmath.h.