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/**
* @file class1\deferred\terrainF.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
* $/LicenseInfo$
*/
/*[EXTRA_CODE_HERE]*/
out vec4 frag_data[4];
uniform sampler2D detail_0;
uniform sampler2D detail_1;
uniform sampler2D detail_2;
uniform sampler2D detail_3;
uniform sampler2D alpha_ramp;
in vec3 pos;
in vec3 vary_normal;
in vec4 vary_texcoord0;
in vec4 vary_texcoord1;
void mirrorClip(vec3 position);
vec4 encodeNormal(vec3 n, float env, float gbuffer_flag);
void main()
{
mirrorClip(pos);
/// Note: This should duplicate the blending functionality currently used for the terrain rendering.
vec4 color0 = texture(detail_0, vary_texcoord0.xy);
vec4 color1 = texture(detail_1, vary_texcoord0.xy);
vec4 color2 = texture(detail_2, vary_texcoord0.xy);
vec4 color3 = texture(detail_3, vary_texcoord0.xy);
float alpha1 = texture(alpha_ramp, vary_texcoord0.zw).a;
float alpha2 = texture(alpha_ramp,vary_texcoord1.xy).a;
float alphaFinal = texture(alpha_ramp, vary_texcoord1.zw).a;
vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
outColor.a = 0.0; // yes, downstream atmospherics
frag_data[0] = max(outColor, vec4(0));
frag_data[1] = vec4(0.0,0.0,0.0,-1.0);
vec3 nvn = normalize(vary_normal);
frag_data[2] = encodeNormal(nvn.xyz, 0, GBUFFER_FLAG_HAS_ATMOS);
#if defined(HAS_EMISSIVE)
frag_data[3] = vec4(0);
#endif
}
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