2 * Copyright 2011, Blender Foundation.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 __device void svm_node_normal(KernelGlobals *kg, ShaderData *sd, float *stack, uint in_normal_offset, uint out_normal_offset, uint out_dot_offset, int *offset)
24 uint4 node1 = read_node(kg, offset);
25 float3 normal = stack_load_float3(stack, in_normal_offset);
28 direction.x = __int_as_float(node1.x);
29 direction.y = __int_as_float(node1.y);
30 direction.z = __int_as_float(node1.z);
31 direction = normalize(direction);
33 if (stack_valid(out_normal_offset))
34 stack_store_float3(stack, out_normal_offset, direction);
36 if (stack_valid(out_dot_offset))
37 stack_store_float(stack, out_dot_offset, dot(direction, normalize(normal)));