VertexArrayBase.h

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#pragma once
#include <QOpenGLVertexArrayObject>
#include <misc/gen/TVector.h>
#include <xgl/Color.h>
#include <xgl/global.h>
 
namespace sf::xgl
{
 
class _XGL_CLASS VertexArrayBase : public QOpenGLVertexArrayObject
{
    Q_OBJECT
 
  public:
    typedef unsigned VertexMember;
 
    enum EVertexMember : VertexMember
    {
      vmPosition = 1 << 0,
      vmNormal = 1 << 1,
      vmColor = 1 << 2,
      vmTexCoord = 1 << 3,
    };
 
    enum EDrawMode
    {
      dmDrawArrays,
      dmDrawElements
    };
 
    enum ERenderOption : int
    {
      roNone = 0,
      roWires = 1 << 0,
      roNormals = 1 << 1
    };
    Q_DECLARE_FLAGS(RenderOptions, ERenderOption)
 
    
    explicit VertexArrayBase(QObject* parent = nullptr);
 
    virtual void draw() = 0;
 
    virtual void paint() = 0;
 
    virtual bool hasColor() const = 0;
 
    virtual bool hasTexture() const = 0;
 
    static const Color& getDefaultColor();
 
    static void setDefaultColor(const QColor& color);
 
    typedef TVector<std::pair<vector3f, vector3f>> NormalsDataType;
 
    virtual NormalsDataType getNormalsData() const = 0;
 
    void triggerGenerate();
 
    void setRenderOptions(RenderOptions options);
 
    RenderOptions getRenderOptions() const;
 
  protected:
    virtual bool setup() = 0;
 
    virtual void clearData() = 0;
 
    bool callGenerate();
    virtual void generate() = 0;
 
    virtual void modifyContext(bool before, bool draw, size_t mode_index);
 
    bool isTriggered() const;
 
  private:
    bool _triggerGenerate;
 
    RenderOptions _renderOptions;
};
 
}// namespace sf::xgl