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
|
/**
* @file underWaterF.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]*/
#ifdef DEFINE_GL_FRAGCOLOR
out vec4 frag_data[3];
#else
#define frag_data gl_FragData
#endif
uniform sampler2D diffuseMap;
uniform sampler2D bumpMap;
uniform sampler2D screenTex;
uniform sampler2D refTex;
uniform sampler2D screenDepth;
uniform vec4 fogCol;
uniform vec3 lightDir;
uniform vec3 specular;
uniform float lightExp;
uniform vec2 fbScale;
uniform float refScale;
uniform float znear;
uniform float zfar;
uniform float kd;
uniform vec4 waterPlane;
uniform vec3 eyeVec;
uniform vec4 waterFogColor;
uniform float waterFogDensity;
uniform float waterFogKS;
uniform vec2 screenRes;
//bigWave is (refCoord.w, view.w);
VARYING vec4 refCoord;
VARYING vec4 littleWave;
VARYING vec4 view;
vec3 srgb_to_linear(vec3 c);
vec2 encode_normal(vec3 n);
vec4 applyWaterFog(vec4 color, vec3 viewVec)
{
//normalize view vector
vec3 view = normalize(viewVec);
float es = -view.z;
//find intersection point with water plane and eye vector
//get eye depth
float e0 = max(-waterPlane.w, 0.0);
//get object depth
float depth = length(viewVec);
//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);
//return vec4(1.0, 0.0, 1.0, 1.0);
return color * D + kc * L;
//depth /= 10.0;
//return vec4(depth,depth,depth,0.0);
}
void main()
{
vec4 color;
//get detail normals
vec3 wave1 = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0-1.0;
vec3 wave2 = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
vec3 wave3 = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;
vec3 wavef = normalize(wave1+wave2+wave3);
//figure out distortion vector (ripply)
vec2 distort = (refCoord.xy/refCoord.z) * 0.5 + 0.5;
distort = distort+wavef.xy*refScale;
vec4 fb = texture2D(screenTex, distort);
fb.rgb = srgb_to_linear(fb.rgb);
frag_data[0] = vec4(fb.rgb, 1.0); // diffuse
frag_data[1] = vec4(0.5,0.5,0.5, 0.95); // speccolor*spec, spec
frag_data[2] = vec4(encode_normal(wavef), 0.0, 0.0); // normalxyz, displace
}
|
