BrushSculptPlugin.h

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/*

             *
            ***
           *****
   *********************       Mercenaries Engineering SARL
     *****************              Copyright (C) 2019
       *************
         *********        http://www.mercenaries-engineering.com
        ***********
       ****     ****
      **           **

*/
#pragma once

#include "BrushPlugin.h"
#include "Utils.h"

namespace maquina
{


class MAQUINA_EXPORT BrushSculptPlugin : public BrushPlugin
{
public:


  class MAQUINA_EXPORT BrushSculptUserData : public BrushUserData
  {
  public:
    BrushSculptUserData(
      const SparseBufferV3f& delta_points,
      const BrushPlugin::GeometryData& geometry,
      const BufferConstM33f& vertex_space,
      const std::shared_ptr<SceneConst>& reference
    );


    virtual bool sculpt_callback(gsl::span<Imath::V3f>& /* delta */, bool /* finished */) { return false; };

    std::shared_ptr<SparseBufferV3f> delta_points;
  
    std::vector<Imath::V3f> delta_points_orig;

    std::vector<Imath::V4f> accum;

    const BrushPlugin::GeometryData& geometry;


    const BufferConstM33f vertex_space;
    gsl::span<const Imath::M33f> vertex_space_span;


    const std::shared_ptr<SceneConst> reference;

    Imath::V3f input_to_ref(size_t i, const Imath::V3f& l);

    Imath::V3f ref_to_input(size_t i, const Imath::V3f& l);

    std::vector<bool> vertex_on_edge;
  };

  BrushSculptPlugin(Node* node);


  virtual std::shared_ptr<BrushSculptUserData> user_data(
    const SparseBufferV3f& delta_points,
    const BrushPlugin::GeometryData& geometry,
    const BufferConstM33f& vertex_space,
    const std::shared_ptr<SceneConst>& reference
  ) { return std::make_shared<BrushSculptUserData>(delta_points, geometry, vertex_space, reference); };

  virtual SceneConst delta_points() const { return {}; }

  virtual void set_delta_points(const SceneConst& /* delta_points */) {}

  virtual SceneConst vertex_space() { return {}; };

  virtual SceneConst reference() { return {}; };

  virtual bool preserve_edges() { return false; }

  // From ToolPlugin
  void deactivate() override;

  // From BrushPlugin
  void stroke_begin(int modifiers) override;
  void stroke_update(bool first, bool finished) override;

private:

  void _stroke_init_data(GeometryData& geometry);
  void _stroke_update(GeometryData& geometry, bool finished);

  // The edited attributes
  Scene _delta_points;
};

inline Imath::V3f BrushSculptPlugin::BrushSculptUserData::input_to_ref(size_t i, const Imath::V3f& l)
{
  if(vertex_space_span.empty())
    return l;

  return mul_dir(l, vertex_space_span[i].inverse());
}

inline Imath::V3f BrushSculptPlugin::BrushSculptUserData::ref_to_input(size_t i, const Imath::V3f& l)
{
  if(vertex_space_span.empty())
    return l;

  return mul_dir(l, vertex_space_span[i]);
}

}