[Bug 51421] sin and cos is broken - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 51421] sin and cos is broken
Date: Tue, 27 Nov 2012 11:26:26 +0000	[thread overview]
Message-ID: <bug-51421-502-2OFchHxOKB@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-51421-502@http.bugs.freedesktop.org/>

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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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