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SPARK : free opensource particle engine in C++

Started by Frifron Jan 5, 2009 at 5:02 PM 1 replies 8.4k views

Original Post

Jan 5, 2009 at 5:02 PM

Hello, let me introduce to you my particle engine library : SPARK is an opensource particle engine on CPU side written in C++. It was designed to be portable, configurable, evolving, and simple to use. Domains of applications of the library are mainly the rendering of 2D and 3D effect based on particles but it can also be used for light simulation of numerous physical entities. You can check the website at http://spark.developpez.com for a list of features, documentation, demos, downloads... The licence of SPARK is the lgpl so it is very permissive. Here are the keys for demos :

F1 : changes the display of text
F2 : displays or the bounding boxes. For SFML Demo : display or not the grid
F3 : changes the rendering mode. For SFML Demo : displays or not the BG
F4 : pauses the particle systems
Supp : reinit the particle systems
Esc : quits the app
Mouse : moves the camera
Mouse wheel : zoom in and out (on certain demos only)

Specific demos keys :

Fire Demo : space : activates or desactivates the smoke
Fountain Demo : space : switches to high or low graphics
Rain Demo : +/- : changes the rain rate
Writing Demo : left mouse button : adds particles
SFML Demo :
- F5 : Destroys all fires
- space : activates or desactivates the smoke
- left mouse button on empty tile : adds a fire
- left mouse button on occupied tile : removes a fire

Any comments, suggestions, questions are welcome ! A few screenshots :

[Edited by - Frifron on January 5, 2009 6:13:27 PM]

fireworking

Feb 2, 2009 at 7:34 PM

Is there the ability to gradually stop emitting particles? I really like your site but I have a suggestion.

When you are listing the Versions, I suggest you do it in a more professional way.

I have never seen your way but it is quite clever.

Instead of using 1.02.02

You should try 1.0.2 Build4 or RC2

RC = Release Candidate.

Other than that, I have just downloaded your particle system. I will stay in tuned. thank you.

Frifron

Feb 2, 2009 at 10:31 PM

Hi, thx for your answer

Quote:
Original post by fireworking
Is there the ability to gradually stop emitting particles?

Yes you have to decrease the emitters' flows at each frame with something like :

emitter.changeFlow(-A * deltaTime);

This function clamps the flow to [0,[. Once the flow reaches 0, the emitter is inactive. Once all emitters in a group are inactive and no more particles are alive, the group becomes inactive

Quote:
When you are listing the Versions, I suggest you do it in a more professional way.

Well this is more or less the way I release stuff professionnaly as well:
A.BB.CC

A being version number
BB being major release number (new features, modifications...)
CC being minor release number (bug fixes and small modif...)

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