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/**
* @file WLSkyF.glsl
*
* $LicenseInfo:firstyear=2005&license=viewerlgpl$
* $/LicenseInfo$
*/
/////////////////////////////////////////////////////////////////////////
// The fragment shader for the sky
/////////////////////////////////////////////////////////////////////////
varying vec4 vary_HazeColor;
uniform sampler2D cloud_noise_texture;
uniform vec4 gamma;
/// Soft clips the light with a gamma correction
vec3 scaleSoftClip(vec3 light) {
//soft clip effect:
light = 1. - clamp(light, vec3(0.), vec3(1.));
light = 1. - pow(light, gamma.xxx);
return light;
}
void main()
{
// Potential Fill-rate optimization. Add cloud calculation
// back in and output alpha of 0 (so that alpha culling kills
// the fragment) if the sky wouldn't show up because the clouds
// are fully opaque.
vec4 color;
color = vary_HazeColor;
color *= 2.;
/// Gamma correct for WL (soft clip effect).
gl_FragData[0] = vec4(scaleSoftClip(color.rgb), 1.0);
gl_FragData[1] = vec4(0.0,0.0,0.0,0.0);
gl_FragData[2] = vec4(0,0,1,0);
}
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