/**
 * @file waterFogF.glsl
 *
 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2007, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */
 


vec4 applyWaterFog(vec4 color)
{
	// GL_EXP2 Fog
	//float fog = exp(-gl_Fog.density * gl_Fog.density * gl_FogFragCoord * gl_FogFragCoord);
	// GL_EXP Fog
	// float fog = exp(-gl_Fog.density * gl_FogFragCoord);
	// GL_LINEAR Fog
	float fog = (gl_Fog.end - gl_FogFragCoord) * gl_Fog.scale;
	fog = clamp(fog, 0.0, 1.0);
	color.rgb = mix(gl_Fog.color.rgb, color.rgb, fog);
	return color;
}