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BUG-540: Math updates by Moon Metty. Reviewed by Chieron Tenk.

Review Request #606 - Created Oct. 24, 2012 and updated

MartinRJ Fayray Reviewers
3.4.0 viewer
BUG-540
None viewer-release 
Improved functions:
getEulerAngles ( now: setQuat(F32 roll, F32 pitch, F32 yaw) )
packToVector3
getAngleAxis
setAngleAxis
shortestArc
projected_vec
angle_between

For details please see: http://jira.phoenixviewer.com/browse/FIRE-7989
and http://jira.phoenixviewer.com/browse/FIRE-7997
Please go to https://jira.secondlife.com/browse/BUG-540

Diff revision 2 (Latest)

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  1. indra/llmath/llmath.h: Loading...
  2. indra/llmath/llquaternion.h: Loading...
  3. indra/llmath/llquaternion.cpp: Loading...
  4. indra/llmath/v3math.h: Loading...
indra/llmath/llmath.h
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/**
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/**
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 * @file llmath.h
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 * @file llmath.h
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 * @brief Useful math constants and macros.
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 * @brief Useful math constants and macros.
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 *
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 *
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 * $LicenseInfo:firstyear=2000&license=viewerlgpl$
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 * $LicenseInfo:firstyear=2000&license=viewerlgpl$
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 * Second Life Viewer Source Code
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 * Second Life Viewer Source Code
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 * Copyright (C) 2010, Linden Research, Inc.
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 * Copyright (C) 2010, Linden Research, Inc.
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 *
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 *
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 * This library is free software; you can redistribute it and/or
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation;
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 * License as published by the Free Software Foundation;
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const F32	F_SQRT2		= 1.4142135623730950488016887242097f;
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const F32	OO_SQRT2	= 0.7071067811865475244008443621049f;
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const F32	OO_SQRT2	= 0.7071067811865475244008443621049f;
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const F32	DEG_TO_RAD	= 0.017453292519943295769236907684886f;
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const F32	DEG_TO_RAD	= 0.017453292519943295769236907684886f;
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const F32	RAD_TO_DEG	= 57.295779513082320876798154814105f;
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const F32	RAD_TO_DEG	= 57.295779513082320876798154814105f;
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const F32	F_APPROXIMATELY_ZERO = 0.00001f;
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const F32	F_APPROXIMATELY_ZERO = 0.00001f;
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const F32	F_LN2		= 0.69314718056f;
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const F32	F_LN2		= 0.69314718056f;
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const F32	OO_LN2		= 1.4426950408889634073599246810019f;
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const F32	OO_LN2		= 1.4426950408889634073599246810019f;
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const F32	F_ALMOST_ZERO	= 0.0001f;

   		
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const F32	F_ALMOST_ZERO	= 0.0001f;

   		

  


  


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const F32	F_ALMOST_ONE	= 1.0f - F_ALMOST_ZERO;

   		
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const F32	F_ALMOST_ONE	= 1.0f - F_ALMOST_ZERO;

   		

  


  


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const F32	GIMBAL_THRESHOLD = 0.000436f; // sets the gimballock threshold 0.025 away from +/-90 degrees

   		

  


  


   


   
    

   		
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// formula: GIMBAL_THRESHOLD = sin(DEG_TO_RAD * gimbal_threshold_angle);

   		

  


  


   


   
    

   		
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// BUG: Eliminate in favor of F_APPROXIMATELY_ZERO above?

   		
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// BUG: Eliminate in favor of F_APPROXIMATELY_ZERO above?

   		

  


  


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const F32 FP_MAG_THRESHOLD = 0.0000001f;

   		
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const F32 FP_MAG_THRESHOLD = 0.0000001f;

   		

  


  


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// TODO: Replace with logic like is_approx_equal

   		
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// TODO: Replace with logic like is_approx_equal

   		

  


  


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inline bool is_approx_zero( F32 f ) { return (-F_APPROXIMATELY_ZERO < f) && (f < F_APPROXIMATELY_ZERO); }

   		
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inline bool is_approx_zero( F32 f ) { return (-F_APPROXIMATELY_ZERO < f) && (f < F_APPROXIMATELY_ZERO); }

   		

  


  


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// These functions work by interpreting sign+exp+mantissa as an unsigned

   		
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// These functions work by interpreting sign+exp+mantissa as an unsigned

   		

  


  


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// integer.

   		
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// integer.

   		

  


  


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// For example:

   		
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// For example:

   		

  


  


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// x = <sign>1 <exponent>00000010 <mantissa>00000000000000000000000

   		
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// x = <sign>1 <exponent>00000010 <mantissa>00000000000000000000000

   		

  


 



 
  

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