mesh_update.h

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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
 
#ifndef _SCENEPIC_MESH_UPDATE_H_
#define _SCENEPIC_MESH_UPDATE_H_
 
#include "json_value.h"
#include "matrix.h"
 
#include <cstdint>
#include <limits>
#include <string>
#include <vector>
 
namespace scenepic
{
  enum class VertexBufferType
  {
    None = 0,
    Positions = 1,
    Normals = 2,
    Colors = 4,
    Rotations = 8
  };
 
  inline VertexBufferType operator|(VertexBufferType a, VertexBufferType b)
  {
    return (VertexBufferType)((int)a | (int)b);
  }
 
  inline VertexBufferType operator&(VertexBufferType a, VertexBufferType b)
  {
    return (VertexBufferType)((int)a & (int)b);
  }
 
  inline VertexBufferType& operator|=(VertexBufferType& a, VertexBufferType b)
  {
    return (VertexBufferType&)((int&)a |= (int)b);
  }
 
  class MeshUpdate
  {
  public:
    const std::string& base_mesh_id() const;
 
    const std::string& mesh_id() const;
 
    VertexBufferRef vertex_buffer();
 
    std::string to_string() const;
 
    JsonValue to_json() const;
 
    std::uint32_t frame_index() const;
 
    bool is_quantized() const;
 
    void quantize(
      std::uint32_t keyframe_index,
      float fixed_point_range,
      const ConstVertexBufferRef& keyframe_vertex_buffer);
 
    VertexBuffer unquantize() const;
 
    float difference_range(const ConstVertexBufferRef& vertex_buffer) const;
 
    static const std::size_t QuantizationBinCount =
      std::numeric_limits<FixedPointVertexBuffer::Scalar>::max();
 
  private:
    friend class Scene;
 
    MeshUpdate(
      const std::string& base_mesh_id,
      const std::string& mesh_id,
      const std::vector<ConstVertexBufferRef>& buffers,
      const std::vector<VertexBufferType>& buffer_types,
      std::uint32_t frame_index);
 
    std::string m_base_mesh_id;
    std::string m_mesh_id;
    VertexBuffer m_vertex_buffer;
    FixedPointVertexBuffer m_fp_vertex_buffer;
    float m_min;
    float m_max;
    std::uint32_t m_frame_index;
    std::uint32_t m_keyframe_index;
    VertexBufferType m_update_flags;
  };
} // namespace scenepic
 
#endif