65 lines
1.9 KiB
GLSL
65 lines
1.9 KiB
GLSL
/**
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* @file class1\deferred\moonF.glsl
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*
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* $LicenseInfo:firstyear=2005&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2005, 2020 Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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/*[EXTRA_CODE_HERE]*/
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out vec4 frag_data[4];
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uniform vec4 color;
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uniform vec3 moon_dir;
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uniform float moon_brightness;
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uniform sampler2D diffuseMap;
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in vec2 vary_texcoord0;
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void main()
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{
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// Restore Pre-EEP alpha fade moon near horizon
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float fade = 1.0;
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if( moon_dir.z > 0 )
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fade = clamp( moon_dir.z*moon_dir.z*4.0, 0.0, 1.0 );
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vec4 c = texture(diffuseMap, vary_texcoord0.xy);
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// SL-14113 Don't write to depth; prevent moon's quad from hiding stars which should be visible
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// Moon texture has transparent pixels <0x55,0x55,0x55,0x00>
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if (c.a <= 2./255.) // 0.00784
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{
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discard;
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}
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c.rgb *= moon_brightness;
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c.a *= fade;
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frag_data[0] = vec4(0);
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frag_data[1] = vec4(0.0);
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frag_data[2] = vec4(0.0, 0.0, 0.0, GBUFFER_FLAG_SKIP_ATMOS);
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frag_data[3] = vec4(c.rgb, c.a);
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// Added and commented out for a ground truth. Do not uncomment - Geenz
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//gl_FragDepth = 0.999985f;
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}
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