node_shader_ambient_occlusion.c

Go to the documentation of this file.

/*
 * 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.
 *
 * The Original Code is Copyright (C) 2005 Blender Foundation.
 * All rights reserved.
 */
 
#include "../node_shader_util.h"
 
/* **************** OUTPUT ******************** */
 
static bNodeSocketTemplate sh_node_ambient_occlusion_in[] = {
    {SOCK_RGBA, N_("Color"), 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f},
    {SOCK_FLOAT, N_("Distance"), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1000.0f},
    {SOCK_VECTOR, N_("Normal"), 0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, PROP_NONE, SOCK_HIDE_VALUE},
    {-1, ""},
};
 
static bNodeSocketTemplate sh_node_ambient_occlusion_out[] = {
    {SOCK_RGBA, N_("Color"), 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f},
    {SOCK_FLOAT, N_("AO"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
    {-1, ""},
};
 
static int node_shader_gpu_ambient_occlusion(GPUMaterial *mat,
                                             bNode *node,
                                             bNodeExecData *UNUSED(execdata),
                                             GPUNodeStack *in,
                                             GPUNodeStack *out)
{
  if (!in[2].link) {
    GPU_link(mat, "world_normals_get", &in[2].link);
  }
 
  GPU_material_flag_set(mat, GPU_MATFLAG_DIFFUSE);
 
  float inverted = node->custom2 ? 1.0f : 0.0f;
  float f_samples = divide_ceil_u(node->custom1, 4);
 
  return GPU_stack_link(mat,
                        node,
                        "node_ambient_occlusion",
                        in,
                        out,
                        GPU_constant(&inverted),
                        GPU_constant(&f_samples));
}
 
static void node_shader_init_ambient_occlusion(bNodeTree *UNUSED(ntree), bNode *node)
{
  node->custom1 = 16; /* samples */
  node->custom2 = 0;
}
 
/* node type definition */
void register_node_type_sh_ambient_occlusion(void)
{
  static bNodeType ntype;
 
  sh_node_type_base(&ntype, SH_NODE_AMBIENT_OCCLUSION, "Ambient Occlusion", NODE_CLASS_INPUT, 0);
  node_type_socket_templates(&ntype, sh_node_ambient_occlusion_in, sh_node_ambient_occlusion_out);
  node_type_init(&ntype, node_shader_init_ambient_occlusion);
  node_type_storage(&ntype, "", NULL, NULL);
  node_type_gpu(&ntype, node_shader_gpu_ambient_occlusion);
 
  nodeRegisterType(&ntype);
}