diff options
Diffstat (limited to 'intern/cycles/kernel/shaders/node_ies_light.osl')
-rw-r--r-- | intern/cycles/kernel/shaders/node_ies_light.osl | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/intern/cycles/kernel/shaders/node_ies_light.osl b/intern/cycles/kernel/shaders/node_ies_light.osl new file mode 100644 index 00000000000..a0954e3a444 --- /dev/null +++ b/intern/cycles/kernel/shaders/node_ies_light.osl @@ -0,0 +1,42 @@ +/* + * Copyright 2011-2015 Blender Foundation + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "stdosl.h" +#include "node_texture.h" + +/* IES Light */ + +shader node_ies_light( + int use_mapping = 0, + matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), + int slot = 0, + float Strength = 1.0, + point Vector = I, + output float Fac = 0.0) +{ + point p = Vector; + + if (use_mapping) { + p = transform(mapping, p); + } + + p = normalize(p); + + float v_angle = acos(-p[2]); + float h_angle = atan2(p[0], p[1]) + M_PI; + + Fac = Strength * texture(format("@l%d", slot), h_angle, v_angle); +} |