test2/intern/cycles/kernel/osl/shaders/node_attribute.osl

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

#include "stdcycles.h"

shader node_attribute(string bump_offset = "center",
                      string name = "",
                      output point Vector = point(0.0, 0.0, 0.0),
                      output color Color = 0.0,
                      output float Fac = 0.0,
                      output float Alpha = 0.0)
{
  float data[4] = {0.0, 0.0, 0.0, 0.0};
  getattribute(name, data);
  Color = color(data[0], data[1], data[2]);
  Vector = point(Color);
  getattribute(name, Fac);
  Alpha = data[3];

  if (bump_offset == "dx") {
    Color += Dx(Color) * BUMP_DX;
    Vector += Dx(Vector) * BUMP_DX;
    Fac += Dx(Fac) * BUMP_DX;
    Alpha += Dx(Alpha) * BUMP_DX;
  }
  else if (bump_offset == "dy") {
    Color += Dy(Color) * BUMP_DY;
    Vector += Dy(Vector) * BUMP_DY;
    Fac += Dy(Fac) * BUMP_DY;
    Alpha += Dy(Alpha) * BUMP_DY;
  }
}