Normals.h

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#pragma once
#include <xgl/TVertexArray.h>
#include <xgl/global.h>
 
namespace sf::xgl
{

class _XGL_CLASS Normals final : public TVertexArray<VertexArrayBase::vmPosition>
{
  public:
    // Use the constructors from the base class.
    using TVertexArray::TVertexArray;

    struct Parameters
    {
        float length;
        float lineWidth;
 
    } parameters{0.02f, 2.0f};

    bool isTarget(const VertexArrayBase* object) const;

    void setTarget(const VertexArrayBase* object);
 
  protected:
    void generate() override;

    void modifyContext(bool before, bool draw, size_t mode_index) override;
 
  private:
    const VertexArrayBase* _vertexArray{nullptr};
};
 
}// namespace sf::xgl