1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/**
* @file fullbrightF.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
* $/LicenseInfo$
*/
#extension GL_ARB_texture_rectangle : enable
#ifdef DEFINE_GL_FRAGCOLOR
out vec4 frag_color;
#else
#define frag_color gl_FragColor
#endif
#if !HAS_DIFFUSE_LOOKUP
uniform sampler2D diffuseMap;
#endif
VARYING vec4 vertex_color;
VARYING vec2 vary_texcoord0;
vec3 fullbrightAtmosTransport(vec3 light);
vec3 fullbrightScaleSoftClip(vec3 light);
vec3 srgb_to_linear(vec3 cs)
{
/* { cs / 12.92, cs <= 0.04045
cl = {
{ ((cs + 0.055)/1.055)^2.4, cs > 0.04045*/
return pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
}
vec3 linear_to_srgb(vec3 cl)
{
/*{ 0.0, 0 <= cl
{ 12.92 * c, 0 < cl < 0.0031308
cs = { 1.055 * cl^0.41666 - 0.055, 0.0031308 <= cl < 1
{ 1.0, cl >= 1*/
return 1.055 * pow(cl, vec3(0.41666)) - 0.055;
}
#ifdef WATER_FOG
uniform vec4 waterPlane;
uniform vec4 waterFogColor;
uniform float waterFogDensity;
uniform float waterFogKS;
vec4 applyWaterFogDeferred(vec3 pos, vec4 color)
{
//normalize view vector
vec3 view = normalize(pos);
float es = -(dot(view, waterPlane.xyz));
//find intersection point with water plane and eye vector
//get eye depth
float e0 = max(-waterPlane.w, 0.0);
vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
//get object depth
float depth = length(pos - int_v);
//get "thickness" of water
float l = max(depth, 0.1);
float kd = waterFogDensity;
float ks = waterFogKS;
vec4 kc = waterFogColor;
float F = 0.98;
float t1 = -kd * pow(F, ks * e0);
float t2 = kd + ks * es;
float t3 = pow(F, t2*l) - 1.0;
float L = min(t1/t2*t3, 1.0);
float D = pow(0.98, l*kd);
color.rgb = color.rgb * D + kc.rgb * L;
color.a = kc.a + color.a;
return color;
}
#endif
uniform float minimum_alpha;
void main()
{
#if HAS_DIFFUSE_LOOKUP
vec4 color = diffuseLookup(vary_texcoord0.xy);
#else
vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
#endif
float final_alpha = color.a * vertex_color.a;
if (color.a < minimum_alpha)
{
discard;
}
color.rgb = srgb_to_linear(color.rgb);
color.rgb *= vertex_color.rgb;
color.rgb = fullbrightAtmosTransport(color.rgb);
color.rgb = fullbrightScaleSoftClip(color.rgb);
color.rgb = linear_to_srgb(color.rgb);
#ifdef WATER_FOG
color = applyWaterFogDeferred(pos, vec4(color));
#endif
frag_color.rgb = color.rgb;
frag_color.a = final_alpha;
}
|
