[Bug 51421] New: sin and cos is broken

[Bug 51421] New: sin and cos is broken

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=51421

             Bug #: 51421
           Summary: sin and cos is broken
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/i915g
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: cme3000@gmail.com


sin is broken with negative values
it just renders on the right side of the screen in shaders like 
http://glsl.heroku.com/e#2465.1

cos seems to be broken, too, just replace sin with cos on that web page.

mesa: git-d105654
OS: Debian unstable, kernel 3.4

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[Bug 51421] sin and cos is broken

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=51421

Golubev Yaroslav <My3blkant50@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTABUG

--- Comment #1 from Golubev Yaroslav <My3blkant50@gmail.com> ---
http://glsl.heroku.com/e#2465.1
>#ifdef GL_ES
>precision mediump float;
>#endif
>uniform float time;
>uniform vec2 mouse;
>uniform vec2 resolution;
>
>void main( void ) {
>	float bla = gl_FragCoord.x/resolution.x; 
>	float value = sin((bla-0.5)*100.0);
>	gl_FragColor = vec4(value,value,value, 1.0 );
>}

1) according to specification sin accepts angle in radians:
2) also gl_FragColor.# should be in [0;1], but sin (x in (0;-pi))<0

=> float value = abs(sin(radians((bla-0.5)*100.0)));
works fine

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