curves.hh

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/* SPDX-FileCopyrightText: 2011-2022 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include <pxr/base/vt/array.h>
#include <pxr/imaging/hd/sceneDelegate.h>
 
#include "BLI_set.hh"
 
#include "DNA_particle_types.h"
 
#include "material.hh"
#include "object.hh"
 
namespace blender::io::hydra {
 
class CurvesData : public ObjectData {
 protected:
  pxr::VtIntArray curve_vertex_counts_;
  pxr::VtVec3fArray vertices_;
  pxr::VtVec2fArray uvs_;
  pxr::VtFloatArray widths_;
 
  MaterialData *mat_data_ = nullptr;
 
 public:
  CurvesData(HydraSceneDelegate *scene_delegate,
             const Object *object,
             pxr::SdfPath const &prim_id);
 
  void init() override;
  void insert() override;
  void remove() override;
  void update() override;
 
  pxr::VtValue get_data(pxr::TfToken const &key) const override;
  pxr::SdfPath material_id() const override;
  void available_materials(Set<pxr::SdfPath> &paths) const override;
 
  pxr::HdBasisCurvesTopology topology() const;
  pxr::HdPrimvarDescriptorVector primvar_descriptors(pxr::HdInterpolation interpolation) const;
 
 protected:
  void write_materials() override;
  virtual void write_curves();
};
 
class HairData : public CurvesData {
 private:
  ParticleSystem *particle_system_;
 
 public:
  HairData(HydraSceneDelegate *scene_delegate,
           const Object *object,
           pxr::SdfPath const &prim_id,
           ParticleSystem *particle_system);
 
  static bool is_supported(const ParticleSystem *particle_system);
  static bool is_visible(HydraSceneDelegate *scene_delegate,
                         Object *object,
                         ParticleSystem *particle_system);
 
  void update() override;
 
 protected:
  void write_transform() override;
  void write_curves() override;
};
 
}  // namespace blender::io::hydra