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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/**
* @file multiSpotLightF.glsl
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* $/LicenseInfo$
*/
#extension GL_ARB_texture_rectangle : enable
#extension GL_ARB_texture_multisample : enable
uniform sampler2DMS diffuseRect;
uniform sampler2DMS specularRect;
uniform sampler2DMS depthMap;
uniform sampler2DMS normalMap;
uniform sampler2DRect lightMap;
uniform sampler2D noiseMap;
uniform sampler2D lightFunc;
uniform sampler2D projectionMap;
uniform mat4 proj_mat; //screen space to light space
uniform float proj_near; //near clip for projection
uniform vec3 proj_p; //plane projection is emitting from (in screen space)
uniform vec3 proj_n;
uniform float proj_focus; //distance from plane to begin blurring
uniform float proj_lod; //(number of mips in proj map)
uniform float proj_range; //range between near clip and far clip plane of projection
uniform float proj_ambient_lod;
uniform float proj_ambiance;
uniform float near_clip;
uniform float far_clip;
uniform vec3 proj_origin; //origin of projection to be used for angular attenuation
uniform float sun_wash;
uniform int proj_shadow_idx;
uniform float shadow_fade;
varying vec4 vary_light;
varying vec4 vary_fragcoord;
uniform vec2 screen_res;
uniform mat4 inv_proj;
vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
{
vec4 ret = texture2DLod(projectionMap, tc, lod);
vec2 dist = tc-vec2(0.5);
float det = max(1.0-lod/(proj_lod*0.5), 0.0);
float d = dot(dist,dist);
ret *= min(clamp((0.25-d)/0.25, 0.0, 1.0)+det, 1.0);
return ret;
}
vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
{
vec4 ret = texture2DLod(projectionMap, tc, lod);
vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
float det = min(lod/(proj_lod*0.5), 1.0);
float d = min(dist.x, dist.y);
float edge = 0.25*det;
ret *= clamp(d/edge, 0.0, 1.0);
return ret;
}
vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
{
vec4 ret = texture2DLod(projectionMap, tc, lod);
vec2 dist = tc-vec2(0.5);
float d = dot(dist,dist);
ret *= min(clamp((0.25-d)/0.25, 0.0, 1.0), 1.0);
return ret;
}
vec4 getPosition(ivec2 pos_screen, int sample)
{
float depth = texelFetch(depthMap, pos_screen, sample).r;
vec2 sc = vec2(pos_screen.xy)*2.0;
sc /= screen_res;
sc -= vec2(1.0,1.0);
vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
vec4 pos = inv_proj * ndc;
pos /= pos.w;
pos.w = 1.0;
return pos;
}
void main()
{
int wght = 0;
vec3 fcol = vec3(0,0,0);
vec2 frag = (vary_fragcoord.xy*0.5+0.5)*screen_res;
ivec2 itc = ivec2(frag.xy);
float shadow = 1.0;
if (proj_shadow_idx >= 0)
{
vec4 shd = texture2DRect(lightMap, frag);
float sh[2];
sh[0] = shd.b;
sh[1] = shd.a;
shadow = min(sh[proj_shadow_idx]+shadow_fade, 1.0);
}
for (int i = 0; i < samples; i++)
{
vec3 pos = getPosition(itc, i).xyz;
vec3 lv = vary_light.xyz-pos.xyz;
float dist2 = dot(lv,lv);
dist2 /= vary_light.w;
if (dist2 <= 1.0)
{
vec3 norm = texelFetch(normalMap, itc, i).xyz;
norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
norm = normalize(norm);
float l_dist = -dot(lv, proj_n);
vec4 proj_tc = (proj_mat * vec4(pos.xyz, 1.0));
if (proj_tc.z >= 0.0)
{
proj_tc.xyz /= proj_tc.w;
float fa = gl_Color.a+1.0;
float dist_atten = min(1.0-(dist2-1.0*(1.0-fa))/fa, 1.0);
if (dist_atten > 0.0)
{
lv = proj_origin-pos.xyz;
lv = normalize(lv);
float da = dot(norm, lv);
vec3 col = vec3(0,0,0);
vec3 diff_tex = texelFetch(diffuseRect, itc, i).rgb;
float noise = texture2D(noiseMap, frag.xy/128.0).b;
if (proj_tc.z > 0.0 &&
proj_tc.x < 1.0 &&
proj_tc.y < 1.0 &&
proj_tc.x > 0.0 &&
proj_tc.y > 0.0)
{
float lit = 0.0;
float amb_da = proj_ambiance;
if (da > 0.0)
{
float diff = clamp((l_dist-proj_focus)/proj_range, 0.0, 1.0);
float lod = diff * proj_lod;
vec4 plcol = texture2DLodDiffuse(projectionMap, proj_tc.xy, lod);
vec3 lcol = gl_Color.rgb * plcol.rgb * plcol.a;
lit = da * dist_atten * noise;
col = lcol*lit*diff_tex*shadow;
amb_da += (da*0.5)*(1.0-shadow)*proj_ambiance;
}
//float diff = clamp((proj_range-proj_focus)/proj_range, 0.0, 1.0);
vec4 amb_plcol = texture2DLodAmbient(projectionMap, proj_tc.xy, proj_lod);
amb_da += (da*da*0.5+0.5)*proj_ambiance;
amb_da *= dist_atten * noise;
amb_da = min(amb_da, 1.0-lit);
col += amb_da*gl_Color.rgb*diff_tex.rgb*amb_plcol.rgb*amb_plcol.a;
}
vec4 spec = texelFetch(specularRect, itc, i);
if (spec.a > 0.0)
{
vec3 ref = reflect(normalize(pos), norm);
//project from point pos in direction ref to plane proj_p, proj_n
vec3 pdelta = proj_p-pos;
float ds = dot(ref, proj_n);
if (ds < 0.0)
{
vec3 pfinal = pos + ref * dot(pdelta, proj_n)/ds;
vec4 stc = (proj_mat * vec4(pfinal.xyz, 1.0));
if (stc.z > 0.0)
{
stc.xy /= stc.w;
float fatten = clamp(spec.a*spec.a+spec.a*0.5, 0.25, 1.0);
stc.xy = (stc.xy - vec2(0.5)) * fatten + vec2(0.5);
if (stc.x < 1.0 &&
stc.y < 1.0 &&
stc.x > 0.0 &&
stc.y > 0.0)
{
vec4 scol = texture2DLodSpecular(projectionMap, stc.xy, proj_lod-spec.a*proj_lod);
col += dist_atten*scol.rgb*gl_Color.rgb*scol.a*spec.rgb*shadow;
}
}
}
}
fcol += col;
wght++;
}
}
}
}
if (wght <= 0)
{
discard;
}
gl_FragColor.rgb = fcol/samples;
gl_FragColor.a = 0.0;
}
|
