From 76425feed8644a8fe1c0e52ef3f77b95012ba44e Mon Sep 17 00:00:00 2001 From: Alexander Romanov Date: Fri, 14 Apr 2017 18:13:44 +0300 Subject: Object Info node support for GLSL mode and the internal render Object Info node can be useful to give some variation to a single material assigned to multiple instances. This patch adds support for Viewport and BI. {F499530} Example: {F499528} Reviewers: merwin, brecht, dfelinto Reviewed By: brecht Subscribers: duarteframos, fclem, homyachetser, Evgeny_Rodygin, AlexKowel, yurikovelenov Differential Revision: https://developer.blender.org/D2425 --- source/blender/blenlib/BLI_hash.h | 66 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 source/blender/blenlib/BLI_hash.h (limited to 'source/blender/blenlib') diff --git a/source/blender/blenlib/BLI_hash.h b/source/blender/blenlib/BLI_hash.h new file mode 100644 index 00000000000..551143f5d72 --- /dev/null +++ b/source/blender/blenlib/BLI_hash.h @@ -0,0 +1,66 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#ifndef __BLI_HASH_H__ +#define __BLI_HASH_H__ + +/** \file BLI_hash.h + * \ingroup bli + */ + +static inline unsigned int BLI_hash_int_2d(unsigned int kx, unsigned int ky) +{ +#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k)))) + + unsigned int a, b, c; + + a = b = c = 0xdeadbeef + (2 << 2) + 13; + a += kx; + b += ky; + + c ^= b; c -= rot(b,14); + a ^= c; a -= rot(c,11); + b ^= a; b -= rot(a,25); + c ^= b; c -= rot(b,16); + a ^= c; a -= rot(c,4); + b ^= a; b -= rot(a,14); + c ^= b; c -= rot(b,24); + + return c; + +#undef rot +} + +static inline unsigned int BLI_hash_string(const char *str) +{ + unsigned int i = 0, c; + + while((c = *str++)) + i = i * 37 + c; + + return i; +} + +static inline unsigned int BLI_hash_int(unsigned int k) +{ + return BLI_hash_int_2d(k, 0); +} + +#endif // __BLI_HASH_H__ -- cgit v1.2.3