fixedmath.h File Reference

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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.
  

• static fixed fixmul (fixed x, fixed y)

  Returns the product of two fixed point values.
  

• static 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.
  

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Detailed Description

Author:

Wei Yongming <ymwei@minigui.org>

Date:

2002/01/12

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

    Copyright (C) 2002-2006 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.

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