diff options
| -rw-r--r-- | intern/cycles/kernel/osl/nodes/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | intern/cycles/kernel/osl/nodes/node_light_falloff.osl | 46 |
2 files changed, 47 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/nodes/CMakeLists.txt b/intern/cycles/kernel/osl/nodes/CMakeLists.txt index 541076f84c9..cb965ac1530 100644 --- a/intern/cycles/kernel/osl/nodes/CMakeLists.txt +++ b/intern/cycles/kernel/osl/nodes/CMakeLists.txt @@ -30,6 +30,7 @@ set(SRC_OSL node_image_texture.osl node_invert.osl node_light_path.osl + node_light_falloff.osl node_magic_texture.osl node_mapping.osl node_math.osl diff --git a/intern/cycles/kernel/osl/nodes/node_light_falloff.osl b/intern/cycles/kernel/osl/nodes/node_light_falloff.osl new file mode 100644 index 00000000000..fd68594a1d8 --- /dev/null +++ b/intern/cycles/kernel/osl/nodes/node_light_falloff.osl @@ -0,0 +1,46 @@ +/* + * Copyright 2012, 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_light_falloff( + float Strength = 0.0, + float Smooth = 0.0, + output float Quadratic = 0.0, + output float Linear = 0.0, + output float Constant = 0.0) +{ + float ray_length = 0.0; + float strength = Strength; + getattribute("std::ray_length", ray_length); + + if(Smooth > 0.0) { + float squared = ray_length*ray_length; + strength *= squared/(Smooth + squared); + } + + /* Quadratic */ + Quadratic = strength; + + /* Linear */ + Linear = (strength*ray_length); + + /* Constant */ + Constant = (strength*ray_length*ray_length); +} + |