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
|
// All lights, no specular highlights
float calcDirectionalLight(vec3 n, vec3 l)
{
float a = max(dot(n,l),0.0);
return a;
}
float calcPointLight(vec3 v, vec3 n, vec4 lp, float la)
{
//get light vector
vec3 lv = lp.xyz-v;
//get distance
float d = length(lv);
//normalize light vector
lv *= 1.0/d;
//distance attenuation
float da = clamp(1.0/(la * d), 0.0, 1.0);
//angular attenuation
da *= calcDirectionalLight(n, lv);
return da;
}
float calcDirectionalSpecular(vec3 view, vec3 n, vec3 l)
{
return pow(max(dot(reflect(view, n),l), 0.0),8.0);
}
float calcDirectionalLightSpecular(inout vec4 specular, vec3 view, vec3 n, vec3 l, vec3 lightCol, float da)
{
specular.rgb += calcDirectionalSpecular(view,n,l)*lightCol*da;
return calcDirectionalLight(n,l);
}
vec3 calcPointLightSpecular(inout vec4 specular, vec3 view, vec3 v, vec3 n, vec3 l, float r, float pw, vec3 lightCol)
{
//get light vector
vec3 lv = l-v;
//get distance
float d = length(lv);
//normalize light vector
lv *= 1.0/d;
//distance attenuation
float da = clamp(1.0/(r * d), 0.0, 1.0);
//angular attenuation
da *= calcDirectionalLightSpecular(specular, view, n, lv, lightCol, da);
return da*lightCol;
}
vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
{
vec4 col;
col.a = color.a;
col.rgb = gl_LightModel.ambient.rgb + baseLight.rgb;
col.rgb += gl_LightSource[0].diffuse.rgb*calcDirectionalLight(norm, gl_LightSource[0].position.xyz);
col.rgb += gl_LightSource[1].diffuse.rgb*calcDirectionalLight(norm, gl_LightSource[1].position.xyz);
col.rgb += gl_LightSource[2].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[2].position, gl_LightSource[2].linearAttenuation);
col.rgb += gl_LightSource[3].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[3].position, gl_LightSource[3].linearAttenuation);
col.rgb += gl_LightSource[4].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[4].position, gl_LightSource[4].linearAttenuation);
col.rgb += gl_LightSource[5].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[5].position, gl_LightSource[5].linearAttenuation);
col.rgb += gl_LightSource[6].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[6].position, gl_LightSource[6].linearAttenuation);
col.rgb += gl_LightSource[7].diffuse.rgb*calcPointLight(pos, norm, gl_LightSource[7].position, gl_LightSource[7].linearAttenuation);
col.rgb = min(col.rgb*color.rgb, 1.0);
gl_FrontColor = vec4(col.rgb, col.a);
return col;
}
vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec3 baseLight)
{
return calcLighting(pos, norm, color, vec4(baseLight, 1.0));
}
vec4 calcLighting(vec3 pos, vec3 norm, vec4 color)
{
return calcLighting(pos, norm, color, vec3(0.0,0.0,0.0));
}
vec4 calcLightingSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor, vec4 baseCol)
{
vec4 col;
col.a = color.a;
col.rgb = gl_LightModel.ambient.rgb;
vec3 view = normalize(pos);
vec4 specular = specularColor;
specularColor.rgb = vec3(0.0, 0.0, 0.0);
col.rgb += baseCol.a*gl_LightSource[0].diffuse.rgb*calcDirectionalLightSpecular(specularColor, view, norm, gl_LightSource[0].position.xyz,gl_LightSource[0].diffuse.rgb*baseCol.a, 1.0);
col.rgb += gl_LightSource[1].diffuse.rgb*calcDirectionalLightSpecular(specularColor, view, norm, gl_LightSource[1].position.xyz,gl_LightSource[1].diffuse.rgb, 1.0);
col.rgb += calcPointLightSpecular(specularColor, view, pos, norm, gl_LightSource[2].position.xyz, gl_LightSource[2].linearAttenuation, gl_LightSource[2].quadraticAttenuation,gl_LightSource[2].diffuse.rgb);
col.rgb += calcPointLightSpecular(specularColor, view, pos, norm, gl_LightSource[3].position.xyz, gl_LightSource[3].linearAttenuation, gl_LightSource[3].quadraticAttenuation,gl_LightSource[3].diffuse.rgb);
col.rgb += calcPointLightSpecular(specularColor, view, pos, norm, gl_LightSource[4].position.xyz, gl_LightSource[4].linearAttenuation, gl_LightSource[4].quadraticAttenuation,gl_LightSource[4].diffuse.rgb);
col.rgb += calcPointLightSpecular(specularColor, view, pos, norm, gl_LightSource[5].position.xyz, gl_LightSource[5].linearAttenuation, gl_LightSource[5].quadraticAttenuation,gl_LightSource[5].diffuse.rgb);
//col.rgb += calcPointLightSpecular(specularColor, view, pos, norm, gl_LightSource[6].position.xyz, gl_LightSource[6].linearAttenuation, gl_LightSource[6].quadraticAttenuation,gl_LightSource[6].diffuse.rgb);
//col.rgb += calcPointLightSpecular(specularColor, view, pos, norm, gl_LightSource[7].position.xyz, gl_LightSource[7].linearAttenuation, gl_LightSource[7].quadraticAttenuation,gl_LightSource[7].diffuse.rgb);
col.rgb += baseCol.rgb;
col.rgb = min(col.rgb*color.rgb, 1.0);
specularColor.rgb = min(specularColor.rgb*specular.rgb, 1.0);
gl_FrontColor = vec4(col.rgb+specularColor.rgb,col.a);
return col;
}
vec4 calcLightingSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor, vec3 baseCol)
{
return calcLightingSpecular(pos, norm, color, specularColor, vec4(baseCol, 1.0));
}
|
