blob: d992821d3fe1cfc083925e10d7e3e5aac32277ef (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#include "stdcycles.h"
shader node_refraction_bsdf(color Color = 0.8,
string distribution = "sharp",
float Roughness = 0.2,
float IOR = 1.45,
normal Normal = N,
output closure color BSDF = 0)
{
float f = max(IOR, 1e-5);
float eta = backfacing() ? 1.0 / f : f;
float roughness = Roughness * Roughness;
if (distribution == "sharp")
BSDF = Color * refraction(Normal, eta);
else if (distribution == "beckmann")
BSDF = Color * microfacet_beckmann_refraction(Normal, roughness, eta);
else if (distribution == "GGX")
BSDF = Color * microfacet_ggx_refraction(Normal, roughness, eta);
}
|