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#ifndef OPENGLCANVAS_H
#define OPENGLCANVAS_H
#include <QGLWidget>
#include <fcntl.h>
#include <unistd.h>
#include "chronos.h"
#include <QTimer>
extern "C" {
#include <ppm.h>
#include <pm.h>
#include <pam.h>
}
#define GL_GLEXT_PROTOTYPES 1
#include<OpenGL/gl.h>
#include<OpenGL/glu.h>
#include<Glut/glut.h>
#include<OpenGL/glext.h>
class OpenGLCanvas : public QGLWidget
{
Q_OBJECT
public:
explicit OpenGLCanvas(QWidget *parent = 0);
protected:
void initializeGL();
void resizeGL(int w, int h);
void paintGL();
void define_texture_coordinates(float *texCoord, int m, int n, float min_phi, float max_phi, float min_lambda, float max_lambda);
void vertex_transformation(float *positions, int m, int n, float center_lambda, float center_phi, float fov_rads, float scale);
void load_sphere_mesh(float *positions, int m, int n);
float calculate_extent(float fov_rads);
void define_triangle_indices(unsigned int * indices, int m, int n);
int getTextureSize(const char * const progname, const char * texturePath);
void readTextureBytes(const char * const progname, const char * texturePath,unsigned char * textureBytes,int * outImageWidth, int * outImageHeight);
char *textFileRead(char *fn);
void setShaders(void);
signals:
void fps(QString newFPS);
public slots:
void change_fov(double f);
// void change_scale(double s);
void change_center_lambda(double lambda);
void change_center_phi(double phi);
void change_fov_scale_relation(QString name);
void change_visualization(QString name);
void slotTimer();
private:
double fov;
double scale;
double center_lambda;
double center_phi;
QString fov_scale_relation;
QString visualization;
Chronos time_time;
QTimer time_timer;
int time_frames;
double time_start;
double time_fps;
unsigned int numberOfIndices;
unsigned int * triangleIndices;
float * verticesPositions;
float * textureCoordinates;
float windowWidth;
float windowHeight;
};
#endif // OPENGLCANVAS_H