All demos :
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Esp : Quits
Del : Reinitialises the particles systems
F1 : Changes the text display (full -> fps only -> nothing)
wheel : Zooms in and out (not all demos)
Mouse : Rotates around (not all demos)



openGL Demos :
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Pause : Pauses the particles systems
F2 : Displays the bounding boxes for particle groups or not
F4 : Changes the renderers (normal -> basic (points) -> none)
F5 : Displays or hides the environment



SFML Demo :
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F2 : Displays or hide the grid
F3 : Displays or hide the background
F4 : Pauses the particles systems
F5 : Destroys all fires
Left click on an occupied tile : Destroys the fire
Left click on an emtu tile : Creates a fire
Space : Generates smoke or not



Fire Demo :
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Space : Generates smoke or not



Rain Demo :
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Cursor keys : Moves around
+/- : Changes the rain intensity



Fountain Demo :
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Space : Switches between high an low graphics



Flakes Demo :
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+/- : Changes the number of particles
Space : Spreads particles



Writing Demo :
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Left drag : Draws particles



Tuto 1 :
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space : spawn fireworks

