/* SPDX-License-Identifier: Apache-2.0
 * Copyright 2011-2022 Blender Foundation */

#include "stdcycles.h"

shader node_voxel_texture(string filename = "",
                          string interpolation = "linear",
                          int use_mapping = 0,
                          matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
                          point Vector = P,
                          output float Density = 0,
                          output color Color = 0)
{
  point p = Vector;
  if (use_mapping) {
    p = transform(mapping, p);
  }
  else {
    p = transform("object", Vector);
    matrix tfm;
    if (getattribute("geom:generated_transform", tfm))
      p = transform(tfm, p);
  }
  if (p[0] < 0.0 || p[1] < 0.0 || p[2] < 0.0 || p[0] > 1.0 || p[1] > 1.0 || p[2] > 1.0) {
    Density = 0;
    Color = color(0, 0, 0);
  }
  else {
    Color = (color)texture3d(
        filename, p, "wrap", "periodic", "interp", interpolation, "alpha", Density);
  }
}