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/***************************************************************************
Engine.h - description
-------------------
begin : Wed Jan 26 2000
copyright : (C) 2000 by Henrik Enqvist
email : henqvist@excite.com
***************************************************************************/
#ifndef ENGINE_H
#define ENGINE_H
#ifndef PRIVATE_H
#error Must include Private.h before Engine.h
#endif
#include "TextureUtil.h"
#include "Group.h"
class Light;
class Camera;
/** The engine in the system.
* @see Group
* @see Shape3D
* @see Light
* @see Sound */
class Engine : public Group {
public:
/** Engine(argc, argv). All arguments belonging to the engine are removed from the vector. */
Engine(int & argc, char** argv);
~Engine();
/** Shutdown the engine */
void stopEngine();
void clearScreen();
/** Deallocate all objects in engine. */
void clear();
/** Draws a background to the screen. Do not use inside render loop, it
might put OpenGL in a weird state. */
void drawSplash(EmTexture * tex);
/** Aligns vertices, calculates light, clears the screen and draws the polygons to
* the GL buffer. */
void render();
/** Swaps the SDL buffers. Extern GLs must use something else. */
void swap();
/** Moves objects, detects collision, etc. Does NOT align vertices, caclulate light or
* draw any polygons. Call the render() function for those things that. */
void tick();
void setEngineCamera(Group*);
/** Sets diffuse and ambient light. The light source is straight above. */
void setLightning(float diffuse, float ambient);
void addLight(Light*);
/** Use this function to limit the main loop to a desired frame rate.
* @return false if the thread is behind schedule else true. see limitFPS */
bool nextTick();
/** Available FPS: 100, 50, 40, 33, 25, 20 */
void setSpeed(int fps=25*4);
void resetTick();
// bool limitFPS(int fps);
void delay(int ms);
void setClearColor(float r, float g, float b, float a);
static float getFps() { return m_fFps; };
/** A short cut to the last created engine, NULL if non created. */
inline static Engine * getCurrentEngine() { return p_Engine; };
#if EM_THREADS
/** When using threaded ticks you must use this function instead of render(). */
void renderThreadSafe();
void startTickThread();
void pauseTickThread();
void resumeTickThread();
void endTickThread();
#endif
protected:
unsigned int m_iPeriod; ///< Allocated time for tick
private:
static float m_fFps;
static Engine * p_Engine;
};
#endif // ENGINE_H
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