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
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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