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
|
/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "stdosl.h"
shader node_normal_map(
normal NormalIn = N,
float Strength = 1.0,
color Color = color(0.5, 0.5, 1.0),
string space = "Tangent",
string attr_name = "geom:tangent",
string attr_sign_name = "geom:tangent_sign",
output normal Normal = NormalIn)
{
color mcolor = 2.0*color(Color[0] - 0.5, Color[1] - 0.5, Color[2] - 0.5);
if (space == "Tangent") {
vector tangent;
float tangent_sign;
getattribute(attr_name, tangent);
getattribute(attr_sign_name, tangent_sign);
tangent = transform("object", "world", tangent);
vector B = tangent_sign * cross(NormalIn, tangent);
Normal = normalize(mcolor[0] * tangent + mcolor[1] * B + mcolor[2] * NormalIn);
}
else if (space == "Object")
Normal = normalize(transform("object", "world", vector(mcolor)));
else if (space == "World")
Normal = normalize(vector(mcolor));
if (Strength != 1.0)
Normal = normalize(NormalIn + (Normal - NormalIn)*max(Strength, 0.0));
}
|
