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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/**
* @file class3\deferred\pointLightF.glsl
*
* $LicenseInfo:firstyear=2022&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2022, 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
/*[EXTRA_CODE_HERE]*/
#ifdef DEFINE_GL_FRAGCOLOR
out vec4 frag_color;
#else
#define frag_color gl_FragColor
#endif
uniform sampler2D diffuseRect;
uniform sampler2D specularRect;
uniform sampler2D normalMap;
uniform sampler2D emissiveRect; // PBR linear packed Occlusion, Roughness, Metal. See: pbropaqueF.glsl
uniform sampler2D noiseMap;
uniform sampler2D lightFunc;
uniform sampler2D depthMap;
uniform vec3 env_mat[3];
uniform float sun_wash;
// light params
uniform vec3 color;
uniform float falloff;
uniform float size;
VARYING vec4 vary_fragcoord;
VARYING vec3 trans_center;
uniform vec2 screen_res;
uniform mat4 inv_proj;
uniform vec4 viewport;
void calcHalfVectors(vec3 lv, vec3 n, vec3 v, out vec3 h, out vec3 l, out float nh, out float nl, out float nv, out float vh, out float lightDist);
float calcLegacyDistanceAttenuation(float distance, float falloff);
vec4 getNormalEnvIntensityFlags(vec2 screenpos, out vec3 n, out float envIntensity);
vec4 getPosition(vec2 pos_screen);
vec2 getScreenXY(vec4 clip);
vec2 getScreenCoord(vec4 clip);
vec3 srgb_to_linear(vec3 c);
float getDepth(vec2 tc);
vec3 pbrPunctual(vec3 diffuseColor, vec3 specularColor,
float perceptualRoughness,
float metallic,
vec3 n, // normal
vec3 v, // surface point to camera
vec3 l); //surface point to light
void main()
{
vec3 final_color = vec3(0);
vec2 tc = getScreenCoord(vary_fragcoord);
vec3 pos = getPosition(tc).xyz;
float envIntensity;
vec3 n;
vec4 norm = getNormalEnvIntensityFlags(tc, n, envIntensity); // need `norm.w` for GET_GBUFFER_FLAG()
vec3 diffuse = texture2D(diffuseRect, tc).rgb;
vec4 spec = texture2D(specularRect, tc);
// Common half vectors calcs
vec3 lv = trans_center.xyz-pos;
vec3 h, l, v = -normalize(pos);
float nh, nl, nv, vh, lightDist;
calcHalfVectors(lv, n, v, h, l, nh, nl, nv, vh, lightDist);
if (lightDist >= size)
{
discard;
}
float dist = lightDist / size;
float dist_atten = calcLegacyDistanceAttenuation(dist, falloff);
if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
{
vec3 colorEmissive = texture2D(emissiveRect, tc).rgb;
vec3 orm = spec.rgb;
float perceptualRoughness = orm.g;
float metallic = orm.b;
vec3 f0 = vec3(0.04);
vec3 baseColor = diffuse.rgb;
vec3 diffuseColor = baseColor.rgb*(vec3(1.0)-f0);
diffuseColor *= 1.0 - metallic;
vec3 specularColor = mix(f0, baseColor.rgb, metallic);
vec3 intensity = dist_atten * color * 3.0; // Legacy attenuation
final_color += intensity*pbrPunctual(diffuseColor, specularColor, perceptualRoughness, metallic, n.xyz, v, normalize(lv));
}
else
{
if (nl < 0.0)
{
discard;
}
diffuse = srgb_to_linear(diffuse);
spec.rgb = srgb_to_linear(spec.rgb);
float noise = texture2D(noiseMap, tc).b;
float lit = nl * dist_atten * noise;
final_color = color.rgb*lit*diffuse;
if (spec.a > 0.0)
{
lit = min(nl*6.0, 1.0) * dist_atten;
float sa = nh;
float fres = pow(1 - vh, 5) * 0.4+0.5;
float gtdenom = 2 * nh;
float gt = max(0,(min(gtdenom * nv / vh, gtdenom * nl / vh)));
if (nh > 0.0)
{
float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
final_color += lit*scol*color.rgb*spec.rgb;
}
}
if (dot(final_color, final_color) <= 0.0)
{
discard;
}
}
frag_color.rgb = final_color;
frag_color.a = 0.0;
}
|
