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#include <QMap>
#include <CGAL/Qt/qglviewer.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <QOpenGLFunctions_2_1>
#include <QOpenGLVertexArrayObject>
#include <QOpenGLBuffer>
#include <QOpenGLShaderProgram>
typedef CGAL::Exact_predicates_inexact_constructions_kernel EPIC;
class Viewer : public CGAL::QGLViewer
{
public:
Viewer(QWidget* parent = nullptr);
~Viewer();
GLuint dl_nb;
protected :
virtual void draw();
virtual void init();
template<class Output_iterator>
void naive_compute_intersection_points(const std::vector<EPIC::Point_3>&,Output_iterator) const;
private:
//Shaders elements
int vertexLocation[3];
int normalsLocation[3];
int centerLocation;
int trivialCenterLocation;
int mvpLocation;
int mvLocation;
int colorLocation;
int lightLocation[5];
bool extension_is_found;
std::vector<float> pos_points;
std::vector<float> pos_lines;
std::vector<float> pos_sphere;
std::vector<float> pos_sphere_inter;
std::vector<float> normals;
std::vector<float> normals_inter;
std::vector<float> trivial_center;
std::vector<float> normals_lines;
QOpenGLBuffer buffers[9];
QOpenGLVertexArrayObject vao[3];
QOpenGLShaderProgram rendering_program;
QOpenGLShaderProgram rendering_program_no_ext;
typedef void (APIENTRYP PFNGLDRAWARRAYSINSTANCEDARBPROC) (GLenum mode, GLint first, GLsizei count, GLsizei primcount);
typedef void (APIENTRYP PFNGLVERTEXATTRIBDIVISORARBPROC) (GLuint index, GLuint divisor);
PFNGLDRAWARRAYSINSTANCEDARBPROC glDrawArraysInstanced;
PFNGLVERTEXATTRIBDIVISORARBPROC glVertexAttribDivisor;
void initialize_buffers();
void compute_elements();
void attrib_buffers(CGAL::QGLViewer*);
void compile_shaders();
};
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