https://github.com/divideconcept/FastTrigo

Fast yet accurate trigonometric functions
https://github.com/divideconcept/FastTrigo

Last synced: 3 months ago
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Fast yet accurate trigonometric functions

• Host: GitHub
• URL: https://github.com/divideconcept/FastTrigo
• Owner: divideconcept
• License: bsd-3-clause
• Created: 2013-01-26T20:38:51.000Z (about 12 years ago)
• Default Branch: master
• Last Pushed: 2022-05-11T12:18:33.000Z (over 2 years ago)
• Last Synced: 2024-08-01T00:41:30.213Z (6 months ago)
• Language: C++
• Homepage: http://www.divideconcept.net
• Size: 12.7 KB
• Stars: 140
• Watchers: 6
• Forks: 15
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesomecpp - FastTrigo - - fast yet accurate trigonometric functions. (Math)

README

        
FastTrigo 1.0 (c) 2013 Robin Lobel

=========

Fast yet accurate trigonometric functions

Each namespace (FT, FTA) has 3 sets of functions:

    Scalar: standard trigonometric functions

    Packed Scalar: same functions computing 4 values at the same time (using SSE/SSE2/SSE3/SSE4.1 if available)

    Qt: convenience functions if using QVector2D/QVector3D classes from Qt

  

FT Accuracy:

    FT::sqrt/sqrt_ps max error: 0.032% (average error: 0.0094%)

    FT::atan2/atan2_ps max error: 0.024% (0.0015 radians, 0.086 degrees)

    FT::cos/cos_ps max error: 0.06%

    FT::sin/sin_ps max error: 0.06%

FT Speed up (MSVC2012 x64):

    FT::sqrt speed up: x2.5 (from standard sqrt)

    FT::atan2 speed up: x2.3 (from standard atan2)

    FT::sin/cos speed up: x1.9 (from standard sin/cos)

    FT::sincos speed up: x2.3 (from standard sin+cos)

    FT::sqrt_ps speed up: x8 (from standard sqrt)

    FT::atan2_ps speed up: x7.3 (from standard atan2)

    FT::sin_ps/cos_ps speed up: x4.9 (from standard sin/cos)

    FT::sincos_ps speed up: x6.2 (from standard sin+cos)

FTA Accuracy:

    FTA::sqrt/sqrt_ps max error: 0%

    FTA::atan2/atan2_ps max error: 0.0005%

    FTA::cos/cos_ps max error: 0.0007%

    FTA::sin/sin_ps max error: 0.0007%

FTA Speed up (MSVC2012 x64):

    FTA::sqrt speed up: x1.5 (from standard sqrt)

    FTA::atan2 speed up: x1.7 (from standard atan2)

    FTA::sin/cos speed up: x1.6 (from standard sin/cos)

    FTA::sincos speed up: x1.8 (from standard sin+cos)

    FTA::sqrt_ps speed up: x4.9 (from standard sqrt)

    FTA::atan2_ps speed up: x5.2 (from standard atan2)

    FTA::sin_ps/cos_ps speed up: x4.3 (from standard sin/cos)

    FTA::sincos_ps speed up: x5.2 (from standard sin+cos)

Distributed under Revised BSD License