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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/**
* @file class3\deferred\multiPointLightF.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
* $/LicenseInfo$
*/
/*[EXTRA_CODE_HERE]*/
out vec4 frag_color;
uniform sampler2D diffuseRect;
uniform sampler2D specularRect;
uniform sampler2D emissiveRect; // PBR linear packed Occlusion, Roughness, Metal. See: pbropaqueF.glsl
uniform sampler2D lightFunc;
uniform vec3 env_mat[3];
uniform float sun_wash;
uniform int light_count;
uniform vec4 light[LIGHT_COUNT]; // .w = size; see C++ fullscreen_lights.push_back()
uniform vec4 light_col[LIGHT_COUNT]; // .a = falloff
uniform vec2 screen_res;
uniform float far_z;
uniform mat4 inv_proj;
in vec4 vary_fragcoord;
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 getPosition(vec2 pos_screen);
vec4 getNorm(vec2 screenpos);
vec2 getScreenXY(vec4 clip);
vec2 getScreenCoord(vec4 clip);
vec3 srgb_to_linear(vec3 c);
// Util
vec3 hue_to_rgb(float hue);
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, 0, 0);
vec2 tc = getScreenCoord(vary_fragcoord);
vec3 pos = getPosition(tc).xyz;
if (pos.z < far_z)
{
discard;
}
vec4 norm = getNorm(tc); // need `norm.w` for GET_GBUFFER_FLAG()
vec3 n = norm.xyz;
vec4 spec = texture(specularRect, tc);
vec3 diffuse = texture(diffuseRect, tc).rgb;
vec3 h, l, v = -normalize(pos);
float nh, nv, vh, lightDist;
if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
{
vec3 colorEmissive = texture(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);
for (int light_idx = 0; light_idx < LIGHT_COUNT; ++light_idx)
{
vec3 lightColor = light_col[ light_idx ].rgb; // Already in linear, see pipeline.cpp: volume->getLightLinearColor();
float falloff = light_col[ light_idx ].a;
float lightSize = light[ light_idx ].w;
vec3 lv = light[ light_idx ].xyz - pos;
lightDist = length(lv);
float dist = lightDist / lightSize;
if (dist <= 1.0)
{
lv /= lightDist;
float dist_atten = calcLegacyDistanceAttenuation(dist, falloff);
vec3 intensity = dist_atten * lightColor * 3.25;
final_color += intensity*pbrPunctual(diffuseColor, specularColor, perceptualRoughness, metallic, n.xyz, v, lv);
}
}
}
else
{
diffuse = srgb_to_linear(diffuse);
spec.rgb = srgb_to_linear(spec.rgb);
// As of OSX 10.6.7 ATI Apple's crash when using a variable size loop
for (int i = 0; i < LIGHT_COUNT; ++i)
{
vec3 lv = light[i].xyz - pos;
float dist = length(lv);
dist /= light[i].w;
if (dist <= 1.0)
{
float nl = dot(n, lv);
if (nl > 0.0)
{
float lightDist;
calcHalfVectors(lv, n, v, h, l, nh, nl, nv, vh, lightDist);
float fa = light_col[i].a;
float dist_atten = calcLegacyDistanceAttenuation(dist, fa);
float lit = nl * dist_atten;
vec3 col = light_col[i].rgb * lit * diffuse;
if (spec.a > 0.0)
{
lit = min(nl * 6.0, 1.0) * dist_atten;
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 * texture(lightFunc, vec2(nh, spec.a)).r * gt / (nh * nl);
col += lit * scol * light_col[i].rgb * spec.rgb;
}
}
final_color += col;
}
}
}
}
frag_color.rgb = max(final_color, vec3(0));
frag_color.a = 0.0;
#ifdef IS_AMD_CARD
// If it's AMD make sure the GLSL compiler sees the arrays referenced once by static index. Otherwise it seems to optimise the storage
// away which leads to unfun crashes and artifacts.
vec4 dummy1 = light[0];
vec4 dummy2 = light_col[0];
vec4 dummy3 = light[LIGHT_COUNT - 1];
vec4 dummy4 = light_col[LIGHT_COUNT - 1];
#endif
}
|
