fixedmath.h File Reference

Functions

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

Detailed Description

Author:: Wei Yongming <ymwei@minigui.org>

Date:: 2002/01/12

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


    Copyright (C) 2002-2009 Feynman Software.
    Copyright (C) 1998-2002 Wei Yongming.

    All rights reserved by Feynman Software.

    This file is part of MiniGUI, a compact cross-platform Graphics 
    User Interface (GUI) support system for real-time embedded systems.

Definition in file fixedmath.h.