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Cycles: add Point Info node

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With (center) position, radius and random value outputs.

Eevee does not yet support rendering point clouds, but an untested
implementation of this node was added for when it does.

Ref T92573
This commit is contained in:
Brecht Van Lommel
2022-01-25 13:25:33 +01:00
parent eab066cbf2
commit c813a1b358
33 changed files with 339 additions and 47 deletions
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11
source/blender/gpu/shaders/material/gpu_shader_material_hair_info.glsl
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@@ -1,15 +1,4 @@
float wang_hash_noise(uint s)
{
s = (s ^ 61u) ^ (s >> 16u);
s *= 9u;
s = s ^ (s >> 4u);
s *= 0x27d4eb2du;
s = s ^ (s >> 15u);
return fract(float(s) / 4294967296.0);
}
void node_hair_info(float hair_length,
out float is_strand,
out float intercept,

11
source/blender/gpu/shaders/material/gpu_shader_material_hash.glsl
View File

@@ -215,3 +215,14 @@ float integer_noise(int n)
nn = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff;
return 0.5 * (float(nn) / 1073741824.0);
}
float wang_hash_noise(uint s)
{
s = (s ^ 61u) ^ (s >> 16u);
s *= 9u;
s = s ^ (s >> 4u);
s *= 0x27d4eb2du;
s = s ^ (s >> 15u);
return fract(float(s) / 4294967296.0);
}

13
source/blender/gpu/shaders/material/gpu_shader_material_point_info.glsl Normal file
View File

@@ -0,0 +1,13 @@
void node_point_info(out vec3 position, out float radius, out float random)
{
#ifdef POINTCLOUD_SHADER
position = pointPosition;
radius = pointRadius;
random = wang_hash_noise(uint(pointID));
#else
position = vec3(0.0, 0.0, 0.0);
radius = 0.0;
random = 0.0;
#endif
}