3dobj-renderer/include/opglwidget.h

#include <QtWidgets/QOpenGLWidget>
#include "obj.h"
#include <QKeyEvent>
#include <QMouseEvent>

class OPGLWidget : public QOpenGLWidget
{
	Q_OBJECT
public:
	OPGLWidget(QWidget *parent) : QOpenGLWidget(parent) {}
	ObjectLoader obj;
public slots:
	void paintGL(); // for repaint loop
	void update_camera(); // for mouse movement
protected:
	void initializeGL();
	void resizeGL(int w, int h);
	void reorient();

	// camera controls
	void keyPressEvent(QKeyEvent *event);
	void keyReleaseEvent(QKeyEvent *event);
	void mousePressEvent(QMouseEvent *event);
	void mouseReleaseEvent(QMouseEvent *event);
	void mouseMoveEvent(QMouseEvent *event);

	// init values
	int mtl_idx = -1; // index to store current material to use
	float loc[3] = {0, 0, 10}; // initial camera position
	float f[3] = {0, 0, -1}; // initial camera direction
	float up[3] = {0, 1, 0}; // initial camera up vector
	float right[3] = {1, 0, 0}; // initial camera right vector
	float vel[3] = {0, 0, 0}; // initial camera velocity
	float speed = 0; // placeholder init for abs speed (for limit and slowing mostly)
	bool key_states[6] = {false, false, false, false, false, false}; // camera control states
	float mouse_loc_old[2]; // for calculating camera direction changes with mouse movement
};