usd_reader_points.hh

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/* SPDX-FileCopyrightText: 2024 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
 
#include "usd.hh"
#include "usd_reader_geom.hh"
 
#include <pxr/usd/usdGeom/points.h>
 
struct Main;
struct PointCloud;
 
namespace blender::io::usd {
 
/*
 * Read UsdGeomPoints primitives as Blender point clouds.
 */
class USDPointsReader : public USDGeomReader {
 private:
  pxr::UsdGeomPoints points_prim_;
 
 public:
  USDPointsReader(const pxr::UsdPrim &prim,
                  const USDImportParams &import_params,
                  const ImportSettings &settings)
      : USDGeomReader(prim, import_params, settings), points_prim_(prim)
  {
  }
 
  bool valid() const override
  {
    return bool(points_prim_);
  }
 
  /* Initial object creation. */
  void create_object(Main *bmain) override;
 
  /* Initial point cloud data update. */
  void read_object_data(Main *bmain, pxr::UsdTimeCode time) override;
 
  /* Implement point cloud update. This may be called by the cache modifier
   * to update animated geometry. */
  void read_geometry(bke::GeometrySet &geometry_set,
                     USDMeshReadParams params,
                     const char **r_err_str) override;
 
  void read_velocities(PointCloud *pointcloud, const pxr::UsdTimeCode time) const;
  void read_custom_data(PointCloud *pointcloud, const pxr::UsdTimeCode time) const;
 
  /* Return true if the USD data may be time varying. */
  bool is_animated() const;
};
 
}  // namespace blender::io::usd