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scene.h
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Wed, Jan 8, 13:32

scene.h
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#ifndef __SCENE_H__
#define __SCENE_H__
/*
* This namespace manages all "low level"
* rendering state and functions
*
* Idea: All graphical components
* are contained in a "linked" list such that,
* for every frame and for each component
* their "update" and "render" method are called.
*
*
*
*/
#include <QGLWidget>
#include <QTime>
#include <list>
#include <set>
#include "sktools.h"
/* Forward declarations */
class SKActor;
class Camera;
class QGLShaderProgram;
class Renderable;
class Evolvable;
class Describable;
class KeyListener;
class MouseListener;
/* typedef for visibility, main typedef in glbuffer.h */
typedef GLuint texture_t;
/* Graphics scene manager */
class Scene : public QGLWidget
{
/* QObject macro, it expands to most of QWidget functionalities */
Q_OBJECT
public:
/* Windows constructor */
Scene(QWidget* parent = 0);
/* Destructor */
~Scene();
/* Iterator definition to loop through all SKActors */
typedef std::list<SKActor*>::iterator iterator;
typedef std::list<SKActor*>::const_iterator const_iterator;
iterator begin();
iterator end();
const_iterator begin() const;
const_iterator end() const;
/* Add and remove SKActor functions */
void addActor(SKActor *);
void rmActor(SKActor *);
/* Returns a list of actors that match the given label */
std::list<SKActor*> findActorsByLabel(const QString&) const;
void removeActorsByLabel(const QString&);
void removeAllActors();
/* Key listeners binding */
void addKeyListener(KeyListener *listener);
void rmKeyListener(KeyListener *listener);
/* Mouse listener binding */
void addMouseListener(MouseListener *listener);
void rmMouseListener(MouseListener *listener);
/* Camera settings */
Camera * getCamera();
/* Timer functions */
void pause();
void resume();
/* Delta time settings */
void setDeltaTime(int delta_time);
int getDeltaTime() const;
/* Perspective angle */
void setPerspectiveAngle(float angle);
float getPerspectiveAngle() const;
/* Screen informations */
float resolution() const;
int glWidth() const;
int glHeight() const;
/* Background color */
void setClearColor(float r, float g, float b, float alpha = 1.0);
void setClearColor(symkit::color_s);
/*
* Quit the program with an exit code
* Alias to QApplication::exit(int)
*/
static void exit(int code = 0);
/* Load a texture */
static texture_t loadTexture(const QString& filename);
/* Constants, filename of the shaders to load */
static const QString vertex_shader;
static const QString fragment_shader;
/* Constants, shaders attribute and uniform locations */
static const QString attrib_vertex;
static const QString attrib_color;
static const char * unif_projection;
protected:
virtual void initialize() {}
private:
/*
* Overridden methods from QGLWidget
* They implement all OpenGL calls
*/
virtual void initializeGL() override;
virtual void resizeGL(int width, int height) override;
virtual void paintGL() override;
/* Timer callback */
virtual void timerEvent(QTimerEvent *event) override;
/* Event listening calls */
virtual bool eventFilter(QObject *watched, QEvent *event) override;
/* Evolution calls */
void evolveActors(float dt);
void checkEvents();
void loadActorMatrix(SKActor*, QMatrix4x4&);
/* SKActor list */
std::list<SKActor*> actors;
/*
* Evolvable list
*/
std::list<Evolvable*> evolvables;
/*
* Descriptable list
* Separing describable from evolvable
* instances allows to call the evolve() and render()
* functions in different times.
*
* Evolvable are called before Describable
*/
std::list<Describable*> descriptables;
/*
* Event listening buffers
*/
std::set<int> key_pressed;
std::set<int> key_released;
std::list<KeyListener*> keyListeners;
std::list<symkit::mouse_s> mouse_pressed;
std::list<symkit::mouse_s> mouse_released;
std::list<symkit::mouse_s> mouse_moving;
std::list<MouseListener*> mouseListeners;
/* A camera instance to be used */
Camera * camera;
/* Shader manager for detailed colors and vertices settings */
QGLShaderProgram * shaderProgram;
/* Time management */
int timerId;
QTime timer;
/* Default delta time settings in milliseconds */
int delta_time;
/* Window and view settings */
float perspective_angle;
/* variables where are read only screen informations */
int width;
int height;
/* screen clear color RGBA format */
symkit::color_s clearColor;
/* Initialized flag */
bool initialized;
};
#endif

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