interpolation.h

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/* SPDX-FileCopyrightText: 2011-2024 Blender Foundation
 *
 * SPDX-License-Identifier: Apache-2.0 */
 
#pragma once
 
#include "subd/osd.h"
 
#include "util/types.h"
#include "util/vector.h"
 
#include <cstddef>
#include <functional>
 
CCL_NAMESPACE_BEGIN
 
class Mesh;
class Attribute;
 
/* Attribute Interpolation. */
 
struct SubdAttribute {
  std::function<void(const int, const int, const int, const int *, const float2 *, const int)>
      interp;
  vector<char> refined_data;
};
 
class SubdAttributeInterpolation {
 protected:
  Mesh &mesh;
 
#ifdef WITH_OPENSUBDIV
  OsdMesh &osd_mesh;
  OsdData &osd_data;
#endif
 
 public:
  vector<SubdAttribute> vertex_attributes;
  vector<SubdAttribute> triangle_attributes;
 
#ifdef WITH_OPENSUBDIV
  SubdAttributeInterpolation(Mesh &mesh, OsdMesh &osd_mesh, OsdData &osd_data);
#else
  SubdAttributeInterpolation(Mesh &mesh);
#endif
 
  void setup();
 
 protected:
  bool support_interp_attribute(const Attribute &attr) const;
  void setup_attribute(const Attribute &subd_attr, Attribute &mesh_attr);
 
  template<typename T>
  void setup_attribute_vertex_linear(const Attribute &subd_attr,
                                     Attribute &mesh_attr,
                                     const int motion_step = 0);
 
  template<typename T>
  void setup_attribute_corner_linear(const Attribute &subd_attr, Attribute &mesh_attr);
 
#ifdef WITH_OPENSUBDIV
  template<typename T>
  void setup_attribute_vertex_smooth(const Attribute &subd_attr,
                                     Attribute &mesh_attr,
                                     const int motion_step = 0);
 
  template<typename T>
  void setup_attribute_corner_smooth(Attribute &mesh_attr,
                                     const int channel,
                                     const vector<char> &merged_values);
#endif
 
  template<typename T> void setup_attribute_face(const Attribute &subd_attr, Attribute &mesh_attr);
 
  template<typename T> void setup_attribute_type(const Attribute &subd_attr, Attribute &mesh_attr);
};
 
CCL_NAMESPACE_END