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
|
void node_attribute_volume_density(sampler3D tex, out vec4 outcol, out vec3 outvec, out float outf)
{
#if defined(MESH_SHADER) && defined(VOLUMETRICS)
vec3 cos = volumeObjectLocalCoord;
#else
vec3 cos = vec3(0.0);
#endif
outf = texture(tex, cos).r;
outvec = vec3(outf, outf, outf);
outcol = vec4(outf, outf, outf, 1.0);
}
uniform vec3 volumeColor = vec3(1.0);
void node_attribute_volume_color(sampler3D tex, out vec4 outcol, out vec3 outvec, out float outf)
{
#if defined(MESH_SHADER) && defined(VOLUMETRICS)
vec3 cos = volumeObjectLocalCoord;
#else
vec3 cos = vec3(0.0);
#endif
vec4 value = texture(tex, cos).rgba;
/* Density is premultiplied for interpolation, divide it out here. */
if (value.a > 1e-8) {
value.rgb /= value.a;
}
outvec = value.rgb * volumeColor;
outcol = vec4(outvec, 1.0);
outf = avg(outvec);
}
void node_attribute_volume_flame(sampler3D tex, out vec4 outcol, out vec3 outvec, out float outf)
{
#if defined(MESH_SHADER) && defined(VOLUMETRICS)
vec3 cos = volumeObjectLocalCoord;
#else
vec3 cos = vec3(0.0);
#endif
outf = texture(tex, cos).r;
outvec = vec3(outf, outf, outf);
outcol = vec4(outf, outf, outf, 1.0);
}
void node_attribute_volume_temperature(
sampler3D tex, vec2 temperature, out vec4 outcol, out vec3 outvec, out float outf)
{
#if defined(MESH_SHADER) && defined(VOLUMETRICS)
vec3 cos = volumeObjectLocalCoord;
#else
vec3 cos = vec3(0.0);
#endif
float flame = texture(tex, cos).r;
outf = (flame > 0.01) ? temperature.x + flame * (temperature.y - temperature.x) : 0.0;
outvec = vec3(outf, outf, outf);
outcol = vec4(outf, outf, outf, 1.0);
}
void node_volume_info(sampler3D densitySampler,
sampler3D colorSampler,
sampler3D flameSampler,
vec2 temperature,
out vec4 outColor,
out float outDensity,
out float outFlame,
out float outTemprature)
{
#if defined(MESH_SHADER) && defined(VOLUMETRICS)
vec3 p = volumeObjectLocalCoord;
#else
vec3 p = vec3(0.0);
#endif
outDensity = texture(densitySampler, p).r;
/* Color is premultiplied for interpolation, divide it out here. */
vec4 color = texture(colorSampler, p);
if (color.a > 1e-8) {
color.rgb /= color.a;
}
outColor = vec4(color.rgb * volumeColor, 1.0);
float flame = texture(flameSampler, p).r;
outFlame = flame;
outTemprature = (flame > 0.01) ? temperature.x + flame * (temperature.y - temperature.x) : 0.0;
}
|
